Example #1
0
int main(int argc, char* argv[]) {
    /* str to lower */
    ngx_str_t str = ngx_string("Hello World!");
    u_char* strlow = (u_char*)malloc(str.len);
    ngx_strlow(strlow, str.data, str.len);
    fprintf(stdout, "strlow %.*s\n", str.len, strlow);
    free(strlow);

    /* base64 encode and decode */
    ngx_str_t raw_str = ngx_string("123abc"); 
    ngx_str_t base64_encoded_str = ngx_null_string; 
    ngx_str_t base64_decoded_str = ngx_null_string;

    base64_encoded_str.len = ngx_base64_encoded_length(raw_str.len);
    base64_encoded_str.data = (u_char*)malloc(base64_encoded_str.len);
    ngx_encode_base64(&base64_encoded_str, &raw_str);
    fprintf(stdout, "%.*s\n", base64_encoded_str.len, base64_encoded_str.data);

    base64_decoded_str.len = ngx_base64_decoded_length(base64_encoded_str.len);
    base64_decoded_str.data = (u_char*)malloc(base64_decoded_str.len);
    ngx_decode_base64(&base64_decoded_str, &base64_encoded_str);
    fprintf(stdout, "%.*s\n", base64_decoded_str.len, base64_decoded_str.data);
    free(base64_encoded_str.data);
    free(base64_decoded_str.data);

    return 0;
}
static char *
ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_sub_loc_conf_t *slcf = conf;

    ngx_str_t                         *value;
    ngx_http_compile_complex_value_t   ccv;

    if (slcf->match.data) {
        return "is duplicate";
    }

    value = cf->args->elts;

    ngx_strlow(value[1].data, value[1].data, value[1].len);

    slcf->match = value[1];

    ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));

    ccv.cf = cf;
    ccv.value = &value[2];
    ccv.complex_value = &slcf->value;

    if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    return NGX_CONF_OK;
}
ngx_int_t
ngx_stream_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
{
    ngx_uint_t                    i;
    ngx_stream_variable_t        *v;
    ngx_stream_core_main_conf_t  *cmcf;

    if (name->len == 0) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid variable name \"$\"");
        return NGX_ERROR;
    }

    cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);

    v = cmcf->variables.elts;

    if (v == NULL) {
        if (ngx_array_init(&cmcf->variables, cf->pool, 4,
                           sizeof(ngx_stream_variable_t))
            != NGX_OK)
        {
            return NGX_ERROR;
        }

    } else {
        for (i = 0; i < cmcf->variables.nelts; i++) {
            if (name->len != v[i].name.len
                || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
            {
                continue;
            }

            return i;
        }
    }

    v = ngx_array_push(&cmcf->variables);
    if (v == NULL) {
        return NGX_ERROR;
    }

    v->name.len = name->len;
    v->name.data = ngx_pnalloc(cf->pool, name->len);
    if (v->name.data == NULL) {
        return NGX_ERROR;
    }

    ngx_strlow(v->name.data, name->data, name->len);

    v->set_handler = NULL;
    v->get_handler = NULL;
    v->data = 0;
    v->flags = 0;
    v->index = cmcf->variables.nelts - 1;

    return v->index;
}
static ngx_stream_variable_t *
ngx_stream_add_prefix_variable(ngx_conf_t *cf, ngx_str_t *name,
    ngx_uint_t flags)
{
    ngx_uint_t                    i;
    ngx_stream_variable_t        *v;
    ngx_stream_core_main_conf_t  *cmcf;

    cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);

    v = cmcf->prefix_variables.elts;
    for (i = 0; i < cmcf->prefix_variables.nelts; i++) {
        if (name->len != v[i].name.len
            || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
        {
            continue;
        }

        v = &v[i];

        if (!(v->flags & NGX_STREAM_VAR_CHANGEABLE)) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "the duplicate \"%V\" variable", name);
            return NULL;
        }

        v->flags &= flags | ~NGX_STREAM_VAR_WEAK;

        return v;
    }

    v = ngx_array_push(&cmcf->prefix_variables);
    if (v == NULL) {
        return NULL;
    }

    v->name.len = name->len;
    v->name.data = ngx_pnalloc(cf->pool, name->len);
    if (v->name.data == NULL) {
        return NULL;
    }

    ngx_strlow(v->name.data, name->data, name->len);

    v->set_handler = NULL;
    v->get_handler = NULL;
    v->data = 0;
    v->flags = flags;
    v->index = 0;

    return v;
}
ngx_http_variable_t *
ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags)
{//在cmcf->variables_keys里面查找有没有key相同的,如果有就返回,否则申请一个新的槽位。
//变量的get/set回调还没有设置,需要上层设置的。
    ngx_int_t                   rc;
    ngx_uint_t                  i;
    ngx_hash_key_t             *key;
    ngx_http_variable_t        *v;
    ngx_http_core_main_conf_t  *cmcf;

    cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);

    key = cmcf->variables_keys->keys.elts;
    for (i = 0; i < cmcf->variables_keys->keys.nelts; i++) {
        if (name->len != key[i].key.len || ngx_strncasecmp(name->data, key[i].key.data, name->len) != 0) {
            continue;
        }
        v = key[i].value;
        if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the duplicate \"%V\" variable", name);
            return NULL;
        }
        return v;
    }
	//没有找到已有的,下面申请一个
    v = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t));
    if (v == NULL) {
        return NULL;
    }
    v->name.len = name->len;
    v->name.data = ngx_pnalloc(cf->pool, name->len);
    if (v->name.data == NULL) {
        return NULL;
    }
    ngx_strlow(v->name.data, name->data, name->len);
    v->set_handler = NULL;//回调需要上层设置。
    v->get_handler = NULL;
    v->data = 0;
    v->flags = flags;
    v->index = 0;//
    rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v, 0);
    if (rc == NGX_ERROR) {
        return NULL;
    }
    if (rc == NGX_BUSY) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "conflicting variable name \"%V\"", name);
        return NULL;
    }
    return v;
}
static int
ngx_http_lua_socket_error_retval_handler(ngx_http_request_t *r,
    ngx_http_lua_socket_udp_upstream_t *u, lua_State *L)
{
    u_char           errstr[NGX_MAX_ERROR_STR];
    u_char          *p;

    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                   "lua udp socket error retval handler");

    if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_RESOLVER) {
        return 2;
    }

    lua_pushnil(L);

    if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_PARTIALWRITE) {
        lua_pushliteral(L, "partial write");

    } else if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_TIMEOUT) {
        lua_pushliteral(L, "timeout");

    } else if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_CLOSED) {
        lua_pushliteral(L, "closed");

    } else if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_BUFTOOSMALL) {
        lua_pushliteral(L, "buffer too small");

    } else if (u->ft_type & NGX_HTTP_LUA_SOCKET_FT_NOMEM) {
        lua_pushliteral(L, "out of memory");

    } else {

        if (u->socket_errno) {
#if (nginx_version >= 1000000)
            p = ngx_strerror(u->socket_errno, errstr, sizeof(errstr));
#else
            p = ngx_strerror_r(u->socket_errno, errstr, sizeof(errstr));
#endif
            /* for compatibility with LuaSocket */
            ngx_strlow(errstr, errstr, p - errstr);
            lua_pushlstring(L, (char *) errstr, p - errstr);

        } else {
            lua_pushliteral(L, "error");
        }
    }

    return 2;
}
Example #7
0
static ngx_int_t
ngx_http_xrlt_init_subrequest_headers(ngx_http_request_t *sr, off_t len)
{
    ngx_table_elt_t  *h;
    u_char           *p;

    memset(&sr->headers_in, 0, sizeof(ngx_http_headers_in_t));

    sr->headers_in.content_length_n = len;

    if (ngx_list_init(&sr->headers_in.headers, sr->pool, 20,
                      sizeof(ngx_table_elt_t)) != NGX_OK)
    {
        return NGX_ERROR;
    }

    h = ngx_list_push(&sr->headers_in.headers);
    if (h == NULL) {
        return NGX_ERROR;
    }

    h->key = ngx_http_xrlt_content_length_key;
    h->lowcase_key = ngx_pnalloc(sr->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    sr->headers_in.content_length = h;

    p = ngx_palloc(sr->pool, NGX_OFF_T_LEN);
    if (p == NULL) {
        return NGX_ERROR;
    }

    h->value.data = p;

    h->value.len = ngx_sprintf(h->value.data, "%O", len) - h->value.data;

    h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(
        ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(
        ngx_hash('c', 'o'), 'n'), 't'), 'e'), 'n'), 't'), '-'), 'l'), 'e'),
        'n'), 'g'), 't'), 'h');

    return NGX_OK;
}
static ngx_int_t __decode_header_line(ngx_http_request_t *r, ngx_hash_t * headers_in_hash)
{
    ngx_table_elt_t * h = ngx_list_push(&r->upstream->headers_in.headers);
    if (!h)
    {
        return NGX_ERROR;
    }

    h->hash = r->header_hash;

    h->key.len = r->header_name_end - r->header_name_start;
    h->value.len = r->header_end - r->header_start;

    h->key.data = ngx_pnalloc(r->pool, h->key.len + 1 + h->value.len + 1 + h->key.len);
    if (h->key.data == NULL)
    {
        return NGX_ERROR;
    }

    h->value.data = h->key.data + h->key.len + 1;
    h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;

    ngx_memcpy(h->key.data, r->header_name_start, h->key.len);
    h->key.data[h->key.len] = '\0';
    ngx_memcpy(h->value.data, r->header_start, h->value.len);
    h->value.data[h->value.len] = '\0';

    if (h->key.len == r->lowcase_index)
    {
        ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
    }
    else
    {
        ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
    }

    ngx_http_upstream_header_t * hh = ngx_hash_find(
        headers_in_hash, h->hash, h->lowcase_key, h->key.len);

    if (hh && hh->handler(r, h, hh->offset) != NGX_OK)
    {
        return NGX_ERROR;
    }
    return NGX_OK;
}
static int
ngx_http_modsecurity_save_headers_in_visitor(void *data, const char *key, const char *value)
{
    ngx_http_request_t         *r = data;
    ngx_table_elt_t            *h;
    ngx_http_header_t          *hh;
    ngx_http_core_main_conf_t  *cmcf;

    h = ngx_list_push(&r->headers_in.headers);
    if (h == NULL) {
        return 0;
    }

    h->key.data = (u_char *)key;
    h->key.len = ngx_strlen(key);

    h->value.data = (u_char *)value;
    h->value.len = ngx_strlen(value);

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);

    if (h->lowcase_key == NULL) {
        return 0;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    h->hash = ngx_hash_key(h->lowcase_key, h->key.len);

    cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);

    hh = ngx_hash_find(&cmcf->headers_in_hash, h->hash,
                       h->lowcase_key, h->key.len);

    if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
        return 0;
    }

    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                   "ModSecurity: save headers in: \"%V: %V\"",
                   &h->key, &h->value);

    return 1;
}
Example #10
0
static int
ngx_http_modsecurity_save_headers_out_visitor(void *data, const char *key, const char *value)
{
    ngx_http_request_t             *r = data;
    ngx_table_elt_t                *h, he;
    ngx_http_upstream_header_t     *hh;
    ngx_http_upstream_main_conf_t  *umcf;

    umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);

    h = &he;

    h->key.data = (u_char *)key;
    h->key.len = ngx_strlen(key);

    h->value.data = (u_char *)value;
    h->value.len = ngx_strlen(value);

    h->lowcase_key = ngx_palloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return 0;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    h->hash = ngx_hash_key(h->lowcase_key, h->key.len);

    hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
                       h->lowcase_key, h->key.len);

    if (hh) {
        /* copy all */
        if (hh->copy_handler(r, h, hh->conf) != NGX_OK) {
            return 0;
        }
    }

    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                   "ModSecurity: save headers out: \"%V: %V\"",
                   &h->key, &h->value);

    return 1;
}
static int
ngx_tcp_lua_req_error_retval_handler(ngx_tcp_session_t *s, lua_State *L)
{
    u_char                   errstr[NGX_MAX_ERROR_STR];
    u_char                  *p;
    ngx_tcp_lua_ctx_t       *ctx;

    ngx_log_debug0(NGX_LOG_DEBUG_TCP, s->connection->log, 0,
                   "lua socket error retval handler");

    //ngx_tcp_lua_socket_finalize(s, u);

    ctx = s->ctx;

    lua_pushnil(L);

    if (ctx->ft_type & NGX_TCP_LUA_REQ_FT_TIMEOUT) {
        lua_pushliteral(L, "timeout");

    } else if (ctx->ft_type & NGX_TCP_LUA_REQ_FT_CLOSED) {
        lua_pushliteral(L, "closed");

    } else if (ctx->ft_type & NGX_TCP_LUA_REQ_FT_NOMEM) {
        lua_pushliteral(L, "out of memory");

    } else {

        if (ctx->socket_errno) {

            p = ngx_strerror(ctx->socket_errno, errstr, sizeof(errstr));

            /* for compatibility with LuaSocket */
            ngx_strlow(errstr, errstr, p - errstr);
            lua_pushlstring(L, (char *) errstr, p - errstr);

        } else {
            lua_pushliteral(L, "error");
        }
    }

    return 2;
}
Example #12
0
/**
 * pass array pointer to read elts[i].key_hash, then for getting the position - key
 */
void dump_hash(ngx_hash_t *hash, ngx_array_t *array)
{
    int loop;
    char prefix[] = "          ";
    u_short test[Max_Num] = {0};
    ngx_uint_t key;
    ngx_hash_key_t* elts;
    int nelts;

    if (hash == NULL)
        return;

    printf("hash = 0x%x: **buckets = 0x%x, size = %d\n", hash, hash->buckets, hash->size);

    for (loop = 0; loop < hash->size; loop++)
    {
        ngx_hash_elt_t *elt = hash->buckets[loop];
        printf("  0x%x: buckets[%d] = 0x%x\n", &(hash->buckets[loop]), loop, elt);
    }
    printf("\n");

    elts = (ngx_hash_key_t*)array->elts;
    nelts = array->nelts;
    for (loop = 0; loop < nelts; loop++)
    {
        char url[Max_Url_Len + 1] = {0};

        key = elts[loop].key_hash % hash->size;
        ngx_hash_elt_t *elt = (ngx_hash_elt_t *) ((u_char *) hash->buckets[key] + test[key]);

        ngx_strlow(url, elt->name, elt->len);
		//值得参考的是%.*s的输出,通过参数控制输出字符的个数
        printf("  key %-10d: buckets %d: 0x%x: {value = \"%s\"%.*s, len = %d, name = \"%s\"%.*s}\n", 
            elts[loop].key_hash, key, elt, (char*)elt->value, Max_Ip_Len - strlen((char*)elt->value), prefix, 
            elt->len, url, Max_Url_Len - elt->len, prefix); //replace elt->name with url

        test[key] = (u_short) (test[key] + NGX_HASH_ELT_SIZE(&elts[loop]));
    }
}
ngx_int_t
ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
{//根据变量名字,获取其在&cmcf->variables里面的下标。如果没有,就新建它。
    ngx_uint_t                  i;
    ngx_http_variable_t        *v;
    ngx_http_core_main_conf_t  *cmcf;

    cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
    v = cmcf->variables.elts;
    if (v == NULL) {//默认申请四个变量空间,为啥是4个呢
        if (ngx_array_init(&cmcf->variables, cf->pool, 4, sizeof(ngx_http_variable_t)) != NGX_OK) {
            return NGX_ERROR;
        }
    } else {
        for (i = 0; i < cmcf->variables.nelts; i++) {//如果cmcf->variables.elts已存在,则根据名字查找,如果找到就返回下标,否则添加一个。
            if (name->len != v[i].name.len || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)  {
                continue;
            }
            return i;
        }
    }
    v = ngx_array_push(&cmcf->variables);
    if (v == NULL) {
        return NGX_ERROR;
    }
    v->name.len = name->len;
    v->name.data = ngx_pnalloc(cf->pool, name->len);
    if (v->name.data == NULL) {
        return NGX_ERROR;
    }
    ngx_strlow(v->name.data, name->data, name->len);
    v->set_handler = NULL;//回调上层设置。不过这个变量貌似鸭羹就没有设置过。
    v->get_handler = NULL;
    v->data = 0;
    v->flags = 0;
    v->index = cmcf->variables.nelts - 1;

    return cmcf->variables.nelts - 1;
}
Example #14
0
static ngx_int_t
ngx_http_add_names(ngx_conf_t *cf, ngx_http_core_srv_conf_t *cscf,
    ngx_http_conf_addr_t *addr)
{
    ngx_uint_t               i;
    ngx_http_server_name_t  *server_names, *name;

    if (addr->names.elts == NULL) {
        if (ngx_array_init(&addr->names, cf->temp_pool, 4,
                           sizeof(ngx_http_server_name_t))
            != NGX_OK)
        {
            return NGX_ERROR;
        }
    }

    server_names = cscf->server_names.elts;

    for (i = 0; i < cscf->server_names.nelts; i++) {

        ngx_strlow(server_names[i].name.data, server_names[i].name.data,
                   server_names[i].name.len);

        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, cf->log, 0,
                       "name: %V", &server_names[i].name);

        name = ngx_array_push(&addr->names);
        if (name == NULL) {
            return NGX_ERROR;
        }

        *name = server_names[i];
    }

    return NGX_OK;
}
static u_char *
ngx_http_v2_string_encode(u_char *dst, u_char *src, size_t len, u_char *tmp,
    ngx_uint_t lower)
{
    size_t  hlen;

    hlen = ngx_http_v2_huff_encode(src, len, tmp, lower);

    if (hlen > 0) {
        *dst = NGX_HTTP_V2_ENCODE_HUFF;
        dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), hlen);
        return ngx_cpymem(dst, tmp, hlen);
    }

    *dst = NGX_HTTP_V2_ENCODE_RAW;
    dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), len);

    if (lower) {
        ngx_strlow(dst, src, len);
        return dst + len;
    }

    return ngx_cpymem(dst, src, len);
}
static ngx_int_t
ngx_http_set_header_helper(ngx_http_request_t *r, ngx_http_lua_header_val_t *hv,
    ngx_str_t *value, ngx_table_elt_t **output_header,
    unsigned no_create)
{
    ngx_table_elt_t             *h;
    ngx_list_part_t             *part;
    ngx_uint_t                   i;
    unsigned                     matched = 0;

    if (hv->no_override) {
        goto new_header;
    }

#if 1
    if (r->headers_out.location
        && r->headers_out.location->value.len
        && r->headers_out.location->value.data[0] == '/')
    {
        /* XXX ngx_http_core_find_config_phase, for example,
         * may not initialize the "key" and "hash" fields
         * for a nasty optimization purpose, and
         * we have to work-around it here */

        r->headers_out.location->hash = ngx_http_lua_location_hash;
        ngx_str_set(&r->headers_out.location->key, "Location");
    }
#endif

    part = &r->headers_out.headers.part;
    h = part->elts;

    for (i = 0; /* void */; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            h = part->elts;
            i = 0;
        }

        if (h[i].hash != 0
            && h[i].key.len == hv->key.len
            && ngx_strncasecmp(hv->key.data, h[i].key.data, h[i].key.len) == 0)
        {
            dd("found out header %.*s", (int) h[i].key.len, h[i].key.data);

            if (value->len == 0 || matched) {
                dd("clearing normal header for %.*s", (int) hv->key.len,
                   hv->key.data);

                h[i].value.len = 0;
                h[i].hash = 0;

            } else {
                dd("setting header to value %.*s", (int) value->len,
                        value->data);

                h[i].value = *value;
                h[i].hash = hv->hash;
            }

            if (output_header) {
                *output_header = &h[i];
            }

            /* return NGX_OK; */
            matched = 1;
        }
    }

    if (matched){
        return NGX_OK;
    }

    if (no_create && value->len == 0) {
        return NGX_OK;
    }

new_header:

    /* XXX we still need to create header slot even if the value
     * is empty because some builtin headers like Last-Modified
     * relies on this to get cleared */

    h = ngx_list_push(&r->headers_out.headers);

    if (h == NULL) {
        return NGX_ERROR;
    }

    if (value->len == 0) {
        h->hash = 0;

    } else {
        h->hash = hv->hash;
    }

    h->key = hv->key;
    h->value = *value;

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    if (output_header) {
        *output_header = h;
    }

    return NGX_OK;
}
static ngx_int_t
ngx_http_set_header_helper(ngx_http_request_t *r, ngx_http_lua_header_val_t *hv,
    ngx_str_t *value, ngx_table_elt_t **output_header,
    unsigned no_create)
{
    ngx_table_elt_t             *h;
    ngx_list_part_t             *part;
    ngx_uint_t                   i;
    unsigned                     matched = 0;

    if (hv->no_override) {
        goto new_header;
    }

    part = &r->headers_out.headers.part;
    h = part->elts;

    for (i = 0; /* void */; i++) {
        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            h = part->elts;
            i = 0;
        }

        if (h[i].key.len == hv->key.len
            && ngx_strncasecmp(hv->key.data, h[i].key.data, h[i].key.len) == 0)
        {
            dd("found out header %.*s", (int) h[i].key.len, h[i].key.data);

            if (value->len == 0 || matched) {
                dd("clearing normal header for %.*s", (int) hv->key.len,
                   hv->key.data);

                h[i].value.len = 0;
                h[i].hash = 0;

            } else {
                dd("setting header to value %.*s", (int) value->len,
                        value->data);

                h[i].value = *value;
                h[i].hash = hv->hash;
            }

            if (output_header) {
                *output_header = &h[i];
            }

            /* return NGX_OK; */
            matched = 1;
        }
    }

    if (matched){
        return NGX_OK;
    }

    if (no_create && value->len == 0) {
        return NGX_OK;
    }

new_header:

    /* XXX we still need to create header slot even if the value
     * is empty because some builtin headers like Last-Modified
     * relies on this to get cleared */

    h = ngx_list_push(&r->headers_out.headers);

    if (h == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (value->len == 0) {
        h->hash = 0;

    } else {
        h->hash = hv->hash;
    }

    h->key = hv->key;
    h->value = *value;

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    if (output_header) {
        *output_header = h;
    }

    return NGX_OK;
}
Example #18
0
static ngx_int_t
ngx_http_set_header_helper(ngx_http_request_t *r, ngx_http_lua_header_val_t *hv,
    ngx_str_t *value, ngx_table_elt_t **output_header)
{
    ngx_table_elt_t             *h, *matched;
    ngx_list_part_t             *part;
    ngx_uint_t                   i;
    ngx_uint_t                   rc;

    if (hv->no_override) {
        goto new_header;
    }

    matched = NULL;

retry:
    part = &r->headers_in.headers.part;
    h = part->elts;

    for (i = 0; /* void */; i++) {
        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            h = part->elts;
            i = 0;
        }

        dd("i: %d, part: %p", (int) i, part);

        if (h[i].key.len == hv->key.len
            && ngx_strncasecmp(h[i].key.data, hv->key.data, h[i].key.len)
               == 0)
        {
            if (value->len == 0 || (matched && matched != &h[i])) {
                h[i].hash = 0;

                dd("rm header %.*s: %.*s", (int) h[i].key.len, h[i].key.data,
                   (int) h[i].value.len, h[i].value.data);

                rc = ngx_http_lua_rm_header_helper(&r->headers_in.headers,
                                                   part, i);

                ngx_http_lua_assert(!(r->headers_in.headers.part.next == NULL
                                      && r->headers_in.headers.last
                                         != &r->headers_in.headers.part));

                dd("rm header: rc=%d", (int) rc);

                if (rc == NGX_OK) {

                    if (output_header) {
                        *output_header = NULL;
                    }

                    goto retry;
                }

                return NGX_ERROR;
            }

            h[i].value = *value;

            if (output_header) {
                *output_header = &h[i];
                dd("setting existing builtin input header");
            }

            if (matched == NULL) {
                matched = &h[i];
            }
        }
    }

    if (matched){
        return NGX_OK;
    }

    if (value->len == 0) {
        return NGX_OK;
    }

new_header:
    h = ngx_list_push(&r->headers_in.headers);

    if (h == NULL) {
        return NGX_ERROR;
    }

    dd("created new header for %.*s", (int) hv->key.len, hv->key.data);

    if (value->len == 0) {
        h->hash = 0;

    } else {
        h->hash = hv->hash;
    }

    h->key = hv->key;
    h->value = *value;

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    if (output_header) {
        *output_header = h;
    }

    return NGX_OK;
}
static ngx_int_t
ngx_http_v2_header_filter(ngx_http_request_t *r)
{
    u_char                     status, *pos, *start, *p, *tmp;
    size_t                     len, tmp_len;
    ngx_str_t                  host, location;
    ngx_uint_t                 i, port;
    ngx_list_part_t           *part;
    ngx_table_elt_t           *header;
    ngx_connection_t          *fc;
    ngx_http_cleanup_t        *cln;
    ngx_http_v2_out_frame_t   *frame;
    ngx_http_core_loc_conf_t  *clcf;
    ngx_http_core_srv_conf_t  *cscf;
    u_char                     addr[NGX_SOCKADDR_STRLEN];

    static const u_char nginx[5] = "\x84\xaa\x63\x55\xe7";
#if (NGX_HTTP_GZIP)
    static const u_char accept_encoding[12] =
        "\x8b\x84\x84\x2d\x69\x5b\x05\x44\x3c\x86\xaa\x6f";
#endif

    static size_t nginx_ver_len = ngx_http_v2_literal_size(NGINX_VER);
    static u_char nginx_ver[ngx_http_v2_literal_size(NGINX_VER)];

    if (!r->stream) {
        return ngx_http_next_header_filter(r);
    }

    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                   "http2 header filter");

    if (r->header_sent) {
        return NGX_OK;
    }

    r->header_sent = 1;

    if (r != r->main) {
        return NGX_OK;
    }

    if (r->method == NGX_HTTP_HEAD) {
        r->header_only = 1;
    }

    switch (r->headers_out.status) {

    case NGX_HTTP_OK:
        status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_200_INDEX);
        break;

    case NGX_HTTP_NO_CONTENT:
        r->header_only = 1;

        ngx_str_null(&r->headers_out.content_type);

        r->headers_out.content_length = NULL;
        r->headers_out.content_length_n = -1;

        r->headers_out.last_modified_time = -1;
        r->headers_out.last_modified = NULL;

        status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_204_INDEX);
        break;

    case NGX_HTTP_PARTIAL_CONTENT:
        status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_206_INDEX);
        break;

    case NGX_HTTP_NOT_MODIFIED:
        r->header_only = 1;
        status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_304_INDEX);
        break;

    default:
        r->headers_out.last_modified_time = -1;
        r->headers_out.last_modified = NULL;

        switch (r->headers_out.status) {

        case NGX_HTTP_BAD_REQUEST:
            status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_400_INDEX);
            break;

        case NGX_HTTP_NOT_FOUND:
            status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_404_INDEX);
            break;

        case NGX_HTTP_INTERNAL_SERVER_ERROR:
            status = ngx_http_v2_indexed(NGX_HTTP_V2_STATUS_500_INDEX);
            break;

        default:
            status = 0;
        }
    }

    len = status ? 1 : 1 + ngx_http_v2_literal_size("418");

    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    if (r->headers_out.server == NULL) {
        len += 1 + (clcf->server_tokens ? nginx_ver_len : sizeof(nginx));
    }

    if (r->headers_out.date == NULL) {
        len += 1 + ngx_http_v2_literal_size("Wed, 31 Dec 1986 18:00:00 GMT");
    }

    if (r->headers_out.content_type.len) {
        len += 1 + NGX_HTTP_V2_INT_OCTETS + r->headers_out.content_type.len;

        if (r->headers_out.content_type_len == r->headers_out.content_type.len
            && r->headers_out.charset.len)
        {
            len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
        }
    }

    if (r->headers_out.content_length == NULL
        && r->headers_out.content_length_n >= 0)
    {
        len += 1 + ngx_http_v2_integer_octets(NGX_OFF_T_LEN) + NGX_OFF_T_LEN;
    }

    if (r->headers_out.last_modified == NULL
        && r->headers_out.last_modified_time != -1)
    {
        len += 1 + ngx_http_v2_literal_size("Wed, 31 Dec 1986 18:00:00 GMT");
    }

    fc = r->connection;

    if (r->headers_out.location && r->headers_out.location->value.len) {

        if (r->headers_out.location->value.data[0] == '/') {
            if (clcf->server_name_in_redirect) {
                cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
                host = cscf->server_name;

            } else if (r->headers_in.server.len) {
                host = r->headers_in.server;

            } else {
                host.len = NGX_SOCKADDR_STRLEN;
                host.data = addr;

                if (ngx_connection_local_sockaddr(fc, &host, 0) != NGX_OK) {
                    return NGX_ERROR;
                }
            }

            port = ngx_inet_get_port(fc->local_sockaddr);

            location.len = sizeof("https://") - 1 + host.len
                           + r->headers_out.location->value.len;

            if (clcf->port_in_redirect) {

#if (NGX_HTTP_SSL)
                if (fc->ssl)
                    port = (port == 443) ? 0 : port;
                else
#endif
                    port = (port == 80) ? 0 : port;

            } else {
                port = 0;
            }

            if (port) {
                location.len += sizeof(":65535") - 1;
            }

            location.data = ngx_pnalloc(r->pool, location.len);
            if (location.data == NULL) {
                return NGX_ERROR;
            }

            p = ngx_cpymem(location.data, "http", sizeof("http") - 1);

#if (NGX_HTTP_SSL)
            if (fc->ssl) {
                *p++ = 's';
            }
#endif

            *p++ = ':'; *p++ = '/'; *p++ = '/';
            p = ngx_cpymem(p, host.data, host.len);

            if (port) {
                p = ngx_sprintf(p, ":%ui", port);
            }

            p = ngx_cpymem(p, r->headers_out.location->value.data,
                              r->headers_out.location->value.len);

            /* update r->headers_out.location->value for possible logging */

            r->headers_out.location->value.len = p - location.data;
            r->headers_out.location->value.data = location.data;
            ngx_str_set(&r->headers_out.location->key, "Location");
        }

        r->headers_out.location->hash = 0;

        len += 1 + NGX_HTTP_V2_INT_OCTETS + r->headers_out.location->value.len;
    }

    tmp_len = len;

#if (NGX_HTTP_GZIP)
    if (r->gzip_vary) {
        if (clcf->gzip_vary) {
            len += 1 + sizeof(accept_encoding);

        } else {
            r->gzip_vary = 0;
        }
    }
#endif

    part = &r->headers_out.headers.part;
    header = part->elts;

    for (i = 0; /* void */; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            header = part->elts;
            i = 0;
        }

        if (header[i].hash == 0) {
            continue;
        }

        if (header[i].key.len > NGX_HTTP_V2_MAX_FIELD) {
            ngx_log_error(NGX_LOG_CRIT, fc->log, 0,
                          "too long response header name: \"%V\"",
                          &header[i].key);
            return NGX_ERROR;
        }

        if (header[i].value.len > NGX_HTTP_V2_MAX_FIELD) {
            ngx_log_error(NGX_LOG_CRIT, fc->log, 0,
                          "too long response header value: \"%V: %V\"",
                          &header[i].key, &header[i].value);
            return NGX_ERROR;
        }

        len += 1 + NGX_HTTP_V2_INT_OCTETS + header[i].key.len
                 + NGX_HTTP_V2_INT_OCTETS + header[i].value.len;

        if (header[i].key.len > tmp_len) {
            tmp_len = header[i].key.len;
        }

        if (header[i].value.len > tmp_len) {
            tmp_len = header[i].value.len;
        }
    }

    tmp = ngx_palloc(r->pool, tmp_len);
    pos = ngx_pnalloc(r->pool, len);

    if (pos == NULL || tmp == NULL) {
        return NGX_ERROR;
    }

    start = pos;

    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                   "http2 output header: \":status: %03ui\"",
                   r->headers_out.status);

    if (status) {
        *pos++ = status;

    } else {
        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_STATUS_INDEX);
        *pos++ = NGX_HTTP_V2_ENCODE_RAW | 3;
        pos = ngx_sprintf(pos, "%03ui", r->headers_out.status);
    }

    if (r->headers_out.server == NULL) {
        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"server: %s\"",
                       clcf->server_tokens ? NGINX_VER : "nginx");

        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_SERVER_INDEX);

        if (clcf->server_tokens) {
            if (nginx_ver[0] == '\0') {
                p = ngx_http_v2_write_value(nginx_ver, (u_char *) NGINX_VER,
                                            sizeof(NGINX_VER) - 1, tmp);
                nginx_ver_len = p - nginx_ver;
            }

            pos = ngx_cpymem(pos, nginx_ver, nginx_ver_len);

        } else {
            pos = ngx_cpymem(pos, nginx, sizeof(nginx));
        }
    }

    if (r->headers_out.date == NULL) {
        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"date: %V\"",
                       &ngx_cached_http_time);

        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_DATE_INDEX);
        pos = ngx_http_v2_write_value(pos, ngx_cached_http_time.data,
                                      ngx_cached_http_time.len, tmp);
    }

    if (r->headers_out.content_type.len) {
        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_CONTENT_TYPE_INDEX);

        if (r->headers_out.content_type_len == r->headers_out.content_type.len
            && r->headers_out.charset.len)
        {
            len = r->headers_out.content_type.len + sizeof("; charset=") - 1
                  + r->headers_out.charset.len;

            p = ngx_pnalloc(r->pool, len);
            if (p == NULL) {
                return NGX_ERROR;
            }

            p = ngx_cpymem(p, r->headers_out.content_type.data,
                           r->headers_out.content_type.len);

            p = ngx_cpymem(p, "; charset=", sizeof("; charset=") - 1);

            p = ngx_cpymem(p, r->headers_out.charset.data,
                           r->headers_out.charset.len);

            /* updated r->headers_out.content_type is also needed for logging */

            r->headers_out.content_type.len = len;
            r->headers_out.content_type.data = p - len;
        }

        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"content-type: %V\"",
                       &r->headers_out.content_type);

        pos = ngx_http_v2_write_value(pos, r->headers_out.content_type.data,
                                      r->headers_out.content_type.len, tmp);
    }

    if (r->headers_out.content_length == NULL
        && r->headers_out.content_length_n >= 0)
    {
        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"content-length: %O\"",
                       r->headers_out.content_length_n);

        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_CONTENT_LENGTH_INDEX);

        p = pos;
        pos = ngx_sprintf(pos + 1, "%O", r->headers_out.content_length_n);
        *p = NGX_HTTP_V2_ENCODE_RAW | (u_char) (pos - p - 1);
    }

    if (r->headers_out.last_modified == NULL
        && r->headers_out.last_modified_time != -1)
    {
        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_LAST_MODIFIED_INDEX);

        ngx_http_time(pos, r->headers_out.last_modified_time);
        len = sizeof("Wed, 31 Dec 1986 18:00:00 GMT") - 1;

        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"last-modified: %*s\"",
                       len, pos);

        /*
         * Date will always be encoded using huffman in the temporary buffer,
         * so it's safe here to use src and dst pointing to the same address.
         */
        pos = ngx_http_v2_write_value(pos, pos, len, tmp);
    }

    if (r->headers_out.location && r->headers_out.location->value.len) {
        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"location: %V\"",
                       &r->headers_out.location->value);

        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_LOCATION_INDEX);
        pos = ngx_http_v2_write_value(pos, r->headers_out.location->value.data,
                                      r->headers_out.location->value.len, tmp);
    }

#if (NGX_HTTP_GZIP)
    if (r->gzip_vary) {
        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                       "http2 output header: \"vary: Accept-Encoding\"");

        *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_VARY_INDEX);
        pos = ngx_cpymem(pos, accept_encoding, sizeof(accept_encoding));
    }
#endif

    part = &r->headers_out.headers.part;
    header = part->elts;

    for (i = 0; /* void */; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            header = part->elts;
            i = 0;
        }

        if (header[i].hash == 0) {
            continue;
        }

#if (NGX_DEBUG)
        if (fc->log->log_level & NGX_LOG_DEBUG_HTTP) {
            ngx_strlow(tmp, header[i].key.data, header[i].key.len);

            ngx_log_debug3(NGX_LOG_DEBUG_HTTP, fc->log, 0,
                           "http2 output header: \"%*s: %V\"",
                           header[i].key.len, tmp, &header[i].value);
        }
#endif

        *pos++ = 0;

        pos = ngx_http_v2_write_name(pos, header[i].key.data,
                                     header[i].key.len, tmp);

        pos = ngx_http_v2_write_value(pos, header[i].value.data,
                                      header[i].value.len, tmp);
    }

    frame = ngx_http_v2_create_headers_frame(r, start, pos);
    if (frame == NULL) {
        return NGX_ERROR;
    }

    ngx_http_v2_queue_blocked_frame(r->stream->connection, frame);

    cln = ngx_http_cleanup_add(r, 0);
    if (cln == NULL) {
        return NGX_ERROR;
    }

    cln->handler = ngx_http_v2_filter_cleanup;
    cln->data = r->stream;

    r->stream->queued = 1;

    fc->send_chain = ngx_http_v2_send_chain;
    fc->need_last_buf = 1;

    return ngx_http_v2_filter_send(fc, r->stream);
}
Example #20
0
static int
ngx_http_lua_ngx_resp_get_headers(lua_State *L)
{
    ngx_list_part_t    *part;
    ngx_table_elt_t    *header;
    ngx_http_request_t *r;
    u_char             *lowcase_key = NULL;
    size_t              lowcase_key_sz = 0;
    ngx_uint_t          i;
    int                 n;
    int                 max;
    int                 raw = 0;
    int                 count = 0;

    n = lua_gettop(L);

    if (n >= 1) {
        if (lua_isnil(L, 1)) {
            max = NGX_HTTP_LUA_MAX_HEADERS;

        } else {
            max = luaL_checkinteger(L, 1);
        }

        if (n >= 2) {
            raw = lua_toboolean(L, 2);
        }

    } else {
        max = NGX_HTTP_LUA_MAX_HEADERS;
    }

    r = ngx_http_lua_get_req(L);
    if (r == NULL) {
        return luaL_error(L, "no request object found");
    }

    ngx_http_lua_check_fake_request(L, r);

    part = &r->headers_out.headers.part;
    count = part->nelts;
    while (part->next) {
        part = part->next;
        count += part->nelts;
    }

    if (max > 0 && count > max) {
        count = max;
        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                       "lua exceeding request header limit %d", max);
    }

    lua_createtable(L, 0, count);

    if (!raw) {
        lua_pushlightuserdata(L, &ngx_http_lua_headers_metatable_key);
        lua_rawget(L, LUA_REGISTRYINDEX);
        lua_setmetatable(L, -2);
    }

    part = &r->headers_out.headers.part;
    header = part->elts;

    for (i = 0; /* void */; i++) {

        dd("stack top: %d", lua_gettop(L));

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            header = part->elts;
            i = 0;
        }

        if (header[i].hash == 0) {
            continue;
        }

        if (raw) {
            lua_pushlstring(L, (char *) header[i].key.data, header[i].key.len);

        } else {
            /* nginx does not even bother initializing output header entry's
             * "lowcase_key" field. so we cannot count on that at all. */
            if (header[i].key.len > lowcase_key_sz) {
                lowcase_key_sz = header[i].key.len * 2;

                /* we allocate via Lua's GC to prevent in-request
                 * leaks in the nginx request memory pools */
                lowcase_key = lua_newuserdata(L, lowcase_key_sz);
                lua_insert(L, 1);
            }

            ngx_strlow(lowcase_key, header[i].key.data, header[i].key.len);
            lua_pushlstring(L, (char *) lowcase_key, header[i].key.len);
        }

        /* stack: [udata] table key */

        lua_pushlstring(L, (char *) header[i].value.data,
                        header[i].value.len); /* stack: [udata] table key
                                                 value */

        ngx_http_lua_set_multi_value_table(L, -3);

        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                       "lua response header: \"%V: %V\"",
                       &header[i].key, &header[i].value);

        if (--count == 0) {
            return 1;
        }
    }

    return 1;
}
Example #21
0
ngx_cycle_t *
ngx_init_cycle(ngx_cycle_t *old_cycle)
{
    void                *rv;
    char               **senv, **env;
    ngx_uint_t           i, n;
    ngx_log_t           *log;
    ngx_time_t          *tp;
    ngx_conf_t           conf;
    ngx_pool_t          *pool;
    ngx_cycle_t         *cycle, **old;
    ngx_shm_zone_t      *shm_zone, *oshm_zone;
    ngx_list_part_t     *part, *opart;
    ngx_open_file_t     *file;
    ngx_listening_t     *ls, *nls;
    ngx_core_conf_t     *ccf, *old_ccf;
    ngx_core_module_t   *module;
    char                 hostname[NGX_MAXHOSTNAMELEN];

    ngx_timezone_update();

    /* force localtime update with a new timezone */

    tp = ngx_timeofday();
    tp->sec = 0; // 这会导致秒级时间流逝而强制更新所有时间数据

    ngx_time_update();


    log = old_cycle->log;

    // 创建内存池,然后在内存池中创建cycle,再将该内存池挂到cycle上
    pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
    if (pool == NULL) {
        return NULL;
    }
    pool->log = log;

    cycle = ngx_pcalloc(pool, sizeof(ngx_cycle_t));
    if (cycle == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->pool = pool;
    cycle->log = log;
    cycle->new_log.log_level = NGX_LOG_ERR;
    cycle->old_cycle = old_cycle;

    // 配置前缀
    cycle->conf_prefix.len = old_cycle->conf_prefix.len;
    cycle->conf_prefix.data = ngx_pstrdup(pool, &old_cycle->conf_prefix);
    if (cycle->conf_prefix.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    // 通用前缀
    cycle->prefix.len = old_cycle->prefix.len;
    cycle->prefix.data = ngx_pstrdup(pool, &old_cycle->prefix);
    if (cycle->prefix.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    // 配置文件
    cycle->conf_file.len = old_cycle->conf_file.len;
    cycle->conf_file.data = ngx_pnalloc(pool, old_cycle->conf_file.len + 1);
    if (cycle->conf_file.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }
    ngx_cpystrn(cycle->conf_file.data, old_cycle->conf_file.data,
                old_cycle->conf_file.len + 1);

    // 配置参数
    cycle->conf_param.len = old_cycle->conf_param.len;
    cycle->conf_param.data = ngx_pstrdup(pool, &old_cycle->conf_param);
    if (cycle->conf_param.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    // 路径数组,每个元素是一个数组指针
    n = old_cycle->pathes.nelts ? old_cycle->pathes.nelts : 10;

    cycle->pathes.elts = ngx_pcalloc(pool, n * sizeof(ngx_path_t *));
    if (cycle->pathes.elts == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->pathes.nelts = 0;
    cycle->pathes.size = sizeof(ngx_path_t *);
    cycle->pathes.nalloc = n;
    cycle->pathes.pool = pool;


    // 获取打开的文件数目
    if (old_cycle->open_files.part.nelts) {
        // 统计链表所有元素个数
        n = old_cycle->open_files.part.nelts;
        for (part = old_cycle->open_files.part.next; part; part = part->next) {
            n += part->nelts;
        }
    } else {
        n = 20;
    }

    // 初始化新打开的文件列表,ngx_open_file_t的结构很简单,只有
    // fd, name,文件头尾指针及位置指针
    if (ngx_list_init(&cycle->open_files, pool, n, sizeof(ngx_open_file_t))
        != NGX_OK)
    {
        ngx_destroy_pool(pool);
        return NULL;
    }


    // 共享内存的初始化类似于上面打开文件的初始化
    if (old_cycle->shared_memory.part.nelts) {
        n = old_cycle->shared_memory.part.nelts;
        for (part = old_cycle->shared_memory.part.next; part; part = part->next)
        {
            n += part->nelts;
        }

    } else {
        n = 1;
    }

    if (ngx_list_init(&cycle->shared_memory, pool, n, sizeof(ngx_shm_zone_t))
        != NGX_OK)
    {
        ngx_destroy_pool(pool);
        return NULL;
    }

    // 监听数组
    n = old_cycle->listening.nelts ? old_cycle->listening.nelts : 10;

    cycle->listening.elts = ngx_pcalloc(pool, n * sizeof(ngx_listening_t));
    if (cycle->listening.elts == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->listening.nelts = 0;
    cycle->listening.size = sizeof(ngx_listening_t);
    cycle->listening.nalloc = n;
    cycle->listening.pool = pool;


    // 可重用连接队列
    ngx_queue_init(&cycle->reusable_connections_queue);


    // 创建模块配置数组列表,每个元素是一个指针,
    // 指向保存了模块的配置对象的create_conf回调创建的配置
    cycle->conf_ctx = ngx_pcalloc(pool, ngx_max_module * sizeof(void *));
    if (cycle->conf_ctx == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }


    // 初始化主机名
    if (gethostname(hostname, NGX_MAXHOSTNAMELEN) == -1) {
        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "gethostname() failed");
        ngx_destroy_pool(pool);
        return NULL;
    }

    /* on Linux gethostname() silently truncates name that does not fit */

    hostname[NGX_MAXHOSTNAMELEN - 1] = '\0';
    cycle->hostname.len = ngx_strlen(hostname);

    cycle->hostname.data = ngx_pnalloc(pool, cycle->hostname.len);
    if (cycle->hostname.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    ngx_strlow(cycle->hostname.data, (u_char *) hostname, cycle->hostname.len);


    // 创建核心模块配置,通过调用模块的create_conf函数
    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_CORE_MODULE) {
            continue;
        }

        // 这个ctx是与模块类型相关的
        // 比如NGX_CORE_MODULE类型的模块就是ngx_core_module_t类型
        module = ngx_modules[i]->ctx;

        // ngx_core_module_t的create_conf函数
        // 它会创建一个ngx_core_conf_t类型的对象
        if (module->create_conf) { // ngx_core_module_t的create_conf函数
            rv = module->create_conf(cycle);
            if (rv == NULL) {
                ngx_destroy_pool(pool);
                return NULL;
            }

            // conf_ctx现在指向模块配置数组
            // 对于核心模块来说,元素指针指向ngx_core_module_t.create_conf函
            // 数创建的ngx_core_conf_t类型的对象,给之
            // 后的ngx_core_module_t.init_conf函数初始化
            cycle->conf_ctx[ngx_modules[i]->index] = rv;
        }
    }


    senv = environ;


    // 初始化conf
    ngx_memzero(&conf, sizeof(ngx_conf_t));
    /* STUB: init array ? */
    // 配置命令字符串数组
    conf.args = ngx_array_create(pool, 10, sizeof(ngx_str_t));
    if (conf.args == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    conf.temp_pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
    if (conf.temp_pool == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }


    conf.ctx = cycle->conf_ctx; // 接管模块配置数组
    conf.cycle = cycle;
    conf.pool = pool; // 挂上cycle的内存池
    conf.log = log;
    conf.module_type = NGX_CORE_MODULE;
    conf.cmd_type = NGX_MAIN_CONF; // 命令类型

#if 0
    log->log_level = NGX_LOG_DEBUG_ALL;
#endif

    // ngx_conf_param函数让ngx_conf_t类型的对象conf挂一个
    // 临时的ngx_conf_file_t,再去调用ngx_conf_parse函数解
    // 析用户指定的配置参数(cycle->conf_param),ngx_conf_parse函数
    // 会以parse_param(还有parse_file和parse_block两种方式)方式执行解析循环
    if (ngx_conf_param(&conf) != NGX_CONF_OK) {
        environ = senv;
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    // 解析配置文件
    if (ngx_conf_parse(&conf, &cycle->conf_file) != NGX_CONF_OK) {
        environ = senv;
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    if (ngx_test_config && !ngx_quiet_mode) {
        ngx_log_stderr(0, "the configuration file %s syntax is ok",
                       cycle->conf_file.data);
    }

    // 调用ngx_core_module_t的init_conf函数初始化
    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_CORE_MODULE) {
            continue;
        }

        module = ngx_modules[i]->ctx; // ngx_core_module_t

        if (module->init_conf) {
            if (module->init_conf(cycle, cycle->conf_ctx[ngx_modules[i]->index])
                == NGX_CONF_ERROR)
            {
                environ = senv;
                ngx_destroy_cycle_pools(&conf);
                return NULL;
            }
        }
    }

    if (ngx_process == NGX_PROCESS_SIGNALLER) {
        // 进程角色是信号发送者,比如nginx -s可以停止已有的nginx进程
        return cycle;
    }

    // 就是cycle->conf_ctx[ngx_modules[i]->index],ngx_core_conf_t类型
    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);

    if (ngx_test_config) {

        if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
            goto failed;
        }

    } else if (!ngx_is_init_cycle(old_cycle)) {

        /*
         * we do not create the pid file in the first ngx_init_cycle() call
         * because we need to write the demonized process pid
         */

        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
                                                   ngx_core_module);
        if (ccf->pid.len != old_ccf->pid.len
            || ngx_strcmp(ccf->pid.data, old_ccf->pid.data) != 0)
        {
            /* new pid file name */

            if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
                goto failed;
            }

            ngx_delete_pidfile(old_cycle);
        }
    }


    // 测试锁文件
    if (ngx_test_lockfile(cycle->lock_file.data, log) != NGX_OK) {
        goto failed;
    }

    // 创建目录
    if (ngx_create_pathes(cycle, ccf->user) != NGX_OK) {
        goto failed;
    }


    // 创建新的日志文件
    if (cycle->new_log.file == NULL) {
        cycle->new_log.file = ngx_conf_open_file(cycle, &error_log);
        if (cycle->new_log.file == NULL) {
            goto failed;
        }
    }

    /* open the new files */

    part = &cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].name.len == 0) {
            continue;
        }

        file[i].fd = ngx_open_file(file[i].name.data,
                                   NGX_FILE_APPEND,
                                   NGX_FILE_CREATE_OR_OPEN,
                                   NGX_FILE_DEFAULT_ACCESS);

        ngx_log_debug3(NGX_LOG_DEBUG_CORE, log, 0,
                       "log: %p %d \"%s\"",
                       &file[i], file[i].fd, file[i].name.data);

        if (file[i].fd == NGX_INVALID_FILE) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_open_file_n " \"%s\" failed",
                          file[i].name.data);
            goto failed;
        }

#if !(NGX_WIN32)
        if (fcntl(file[i].fd, F_SETFD, FD_CLOEXEC) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          "fcntl(FD_CLOEXEC) \"%s\" failed",
                          file[i].name.data);
            goto failed;
        }
#endif
    }

    cycle->log = &cycle->new_log;
    pool->log = &cycle->new_log;


    /* create shared memory */

    part = &cycle->shared_memory.part;
    shm_zone = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            shm_zone = part->elts;
            i = 0;
        }

        if (shm_zone[i].shm.size == 0) {
            ngx_log_error(NGX_LOG_EMERG, log, 0,
                          "zero size shared memory zone \"%V\"",
                          &shm_zone[i].shm.name);
            goto failed;
        }

        shm_zone[i].shm.log = cycle->log;

        opart = &old_cycle->shared_memory.part;
        oshm_zone = opart->elts;

        for (n = 0; /* void */ ; n++) {

            if (n >= opart->nelts) {
                if (opart->next == NULL) {
                    break;
                }
                opart = opart->next;
                oshm_zone = opart->elts;
                n = 0;
            }

            if (shm_zone[i].shm.name.len != oshm_zone[n].shm.name.len) {
                continue;
            }

            if (ngx_strncmp(shm_zone[i].shm.name.data,
                            oshm_zone[n].shm.name.data,
                            shm_zone[i].shm.name.len)
                != 0)
            {
                continue;
            }

            if (shm_zone[i].shm.size == oshm_zone[n].shm.size) {
                shm_zone[i].shm.addr = oshm_zone[n].shm.addr;

                if (shm_zone[i].init(&shm_zone[i], oshm_zone[n].data)
                    != NGX_OK)
                {
                    goto failed;
                }

                goto shm_zone_found;
            }

            ngx_shm_free(&oshm_zone[n].shm);

            break;
        }

        if (ngx_shm_alloc(&shm_zone[i].shm) != NGX_OK) {
            goto failed;
        }

        if (ngx_init_zone_pool(cycle, &shm_zone[i]) != NGX_OK) {
            goto failed;
        }

        if (shm_zone[i].init(&shm_zone[i], NULL) != NGX_OK) {
            goto failed;
        }

    shm_zone_found:

        continue;
    }


    /* handle the listening sockets */

    if (old_cycle->listening.nelts) {
        ls = old_cycle->listening.elts;
        for (i = 0; i < old_cycle->listening.nelts; i++) {
            ls[i].remain = 0;
        }

        nls = cycle->listening.elts;
        for (n = 0; n < cycle->listening.nelts; n++) {

            for (i = 0; i < old_cycle->listening.nelts; i++) {
                if (ls[i].ignore) {
                    continue;
                }

                if (ngx_cmp_sockaddr(nls[n].sockaddr, ls[i].sockaddr) == NGX_OK)
                {
                    nls[n].fd = ls[i].fd;
                    nls[n].previous = &ls[i];
                    ls[i].remain = 1;

                    if (ls[n].backlog != nls[i].backlog) {
                        nls[n].listen = 1;
                    }

#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)

                    /*
                     * FreeBSD, except the most recent versions,
                     * could not remove accept filter
                     */
                    nls[n].deferred_accept = ls[i].deferred_accept;

                    if (ls[i].accept_filter && nls[n].accept_filter) {
                        if (ngx_strcmp(ls[i].accept_filter,
                                       nls[n].accept_filter)
                            != 0)
                        {
                            nls[n].delete_deferred = 1;
                            nls[n].add_deferred = 1;
                        }

                    } else if (ls[i].accept_filter) {
                        nls[n].delete_deferred = 1;

                    } else if (nls[n].accept_filter) {
                        nls[n].add_deferred = 1;
                    }
#endif

#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)

                    if (ls[n].deferred_accept && !nls[n].deferred_accept) {
                        nls[n].delete_deferred = 1;

                    } else if (ls[i].deferred_accept != nls[n].deferred_accept)
                    {
                        nls[n].add_deferred = 1;
                    }
#endif
                    break;
                }
            }

            if (nls[n].fd == -1) {
                nls[n].open = 1;
            }
        }

    } else {
        ls = cycle->listening.elts;
        for (i = 0; i < cycle->listening.nelts; i++) {
            ls[i].open = 1;
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
            if (ls[i].accept_filter) {
                ls[i].add_deferred = 1;
            }
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
            if (ls[i].deferred_accept) {
                ls[i].add_deferred = 1;
            }
#endif
        }
    }

    if (ngx_open_listening_sockets(cycle) != NGX_OK) {
        goto failed;
    }

    if (!ngx_test_config) {
        ngx_configure_listening_sockets(cycle);
    }


    /* commit the new cycle configuration */

    if (!ngx_use_stderr && cycle->log->file->fd != ngx_stderr) {

        if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
                          ngx_set_stderr_n " failed");
        }
    }

    pool->log = cycle->log;

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->init_module) {
            if (ngx_modules[i]->init_module(cycle) != NGX_OK) {
                /* fatal */
                exit(1);
            }
        }
    }


    /* close and delete stuff that lefts from an old cycle */

    /* free the unnecessary shared memory */

    opart = &old_cycle->shared_memory.part;
    oshm_zone = opart->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= opart->nelts) {
            if (opart->next == NULL) {
                goto old_shm_zone_done;
            }
            opart = opart->next;
            oshm_zone = opart->elts;
            i = 0;
        }

        part = &cycle->shared_memory.part;
        shm_zone = part->elts;

        for (n = 0; /* void */ ; n++) {

            if (n >= part->nelts) {
                if (part->next == NULL) {
                    break;
                }
                part = part->next;
                shm_zone = part->elts;
                n = 0;
            }

            if (oshm_zone[i].shm.name.len == shm_zone[n].shm.name.len
                && ngx_strncmp(oshm_zone[i].shm.name.data,
                               shm_zone[n].shm.name.data,
                               oshm_zone[i].shm.name.len)
                == 0)
            {
                goto live_shm_zone;
            }
        }

        ngx_shm_free(&oshm_zone[i].shm);

    live_shm_zone:

        continue;
    }

old_shm_zone_done:


    /* close the unnecessary listening sockets */

    ls = old_cycle->listening.elts;
    for (i = 0; i < old_cycle->listening.nelts; i++) {

        if (ls[i].remain || ls[i].fd == -1) {
            continue;
        }

        if (ngx_close_socket(ls[i].fd) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                          ngx_close_socket_n " listening socket on %V failed",
                          &ls[i].addr_text);
        }

#if (NGX_HAVE_UNIX_DOMAIN)

        if (ls[i].sockaddr->sa_family == AF_UNIX) {
            u_char  *name;

            name = ls[i].addr_text.data + sizeof("unix:") - 1;

            ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
                          "deleting socket %s", name);

            if (ngx_delete_file(name) == -1) {
                ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
                              ngx_delete_file_n " %s failed", name);
            }
        }

#endif
    }


    /* close the unnecessary open files */

    part = &old_cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
            continue;
        }

        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_close_file_n " \"%s\" failed",
                          file[i].name.data);
        }
    }

    ngx_destroy_pool(conf.temp_pool);

    if (ngx_process == NGX_PROCESS_MASTER || ngx_is_init_cycle(old_cycle)) {

        /*
         * perl_destruct() frees environ, if it is not the same as it was at
         * perl_construct() time, therefore we save the previous cycle
         * environment before ngx_conf_parse() where it will be changed.
         */

        env = environ;
        environ = senv;

        ngx_destroy_pool(old_cycle->pool);
        cycle->old_cycle = NULL;

        environ = env;

        return cycle;
    }


    if (ngx_temp_pool == NULL) {
        ngx_temp_pool = ngx_create_pool(128, cycle->log);
        if (ngx_temp_pool == NULL) {
            ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
                          "could not create ngx_temp_pool");
            exit(1);
        }

        n = 10;
        ngx_old_cycles.elts = ngx_pcalloc(ngx_temp_pool,
                                          n * sizeof(ngx_cycle_t *));
        if (ngx_old_cycles.elts == NULL) {
            exit(1);
        }
        ngx_old_cycles.nelts = 0;
        ngx_old_cycles.size = sizeof(ngx_cycle_t *);
        ngx_old_cycles.nalloc = n;
        ngx_old_cycles.pool = ngx_temp_pool;

        ngx_cleaner_event.handler = ngx_clean_old_cycles;
        ngx_cleaner_event.log = cycle->log;
        ngx_cleaner_event.data = &dumb;
        dumb.fd = (ngx_socket_t) -1;
    }

    ngx_temp_pool->log = cycle->log;

    old = ngx_array_push(&ngx_old_cycles);
    if (old == NULL) {
        exit(1);
    }
    *old = old_cycle;

    if (!ngx_cleaner_event.timer_set) {
        ngx_add_timer(&ngx_cleaner_event, 30000);
        ngx_cleaner_event.timer_set = 1;
    }

    return cycle;


failed:

    if (!ngx_is_init_cycle(old_cycle)) {
        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
                                                   ngx_core_module);
        if (old_ccf->environment) {
            environ = old_ccf->environment;
        }
    }

    /* rollback the new cycle configuration */

    part = &cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
            continue;
        }

        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_close_file_n " \"%s\" failed",
                          file[i].name.data);
        }
    }

    if (ngx_test_config) {
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    ls = cycle->listening.elts;
    for (i = 0; i < cycle->listening.nelts; i++) {
        if (ls[i].fd == -1 || !ls[i].open) {
            continue;
        }

        if (ngx_close_socket(ls[i].fd) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                          ngx_close_socket_n " %V failed",
                          &ls[i].addr_text);
        }
    }

    ngx_destroy_cycle_pools(&conf);

    return NULL;
}
Example #22
0
static ngx_int_t
process_header(ngx_http_request_t *r)
{
    ngx_str_t                      *status_line;
    ngx_int_t                       rc, status;
    ngx_table_elt_t                *h;
    ngx_http_upstream_t            *u;
    ngx_http_upstream_header_t     *hh;
    ngx_http_upstream_main_conf_t  *umcf;
    ngx_http_core_loc_conf_t       *clcf;

    umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    for ( ;; ) {

        rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);

        if (rc == NGX_OK) {

            /* a header line has been parsed successfully */

            h = ngx_list_push(&r->upstream->headers_in.headers);
            if (h == NULL) {
                return NGX_ERROR;
            }

            h->hash = r->header_hash;

            h->key.len = r->header_name_end - r->header_name_start;
            h->value.len = r->header_end - r->header_start;

            h->key.data = ngx_pnalloc(r->pool,
                                      h->key.len + 1 + h->value.len + 1
                                      + h->key.len);
            if (h->key.data == NULL) {
                return NGX_ERROR;
            }

            h->value.data = h->key.data + h->key.len + 1;
            h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;

            ngx_memcpy(h->key.data, r->header_name_start, h->key.len);
            h->key.data[h->key.len] = '\0';
            ngx_memcpy(h->value.data, r->header_start, h->value.len);
            h->value.data[h->value.len] = '\0';

            if (h->key.len == r->lowcase_index) {
                ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);

            } else {
                ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
            }

            hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
                               h->lowcase_key, h->key.len);

            if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
                return NGX_ERROR;
            }

            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                           "http scgi header: \"%V: %V\"", &h->key, &h->value);

            continue;
        }

        if (rc == NGX_HTTP_PARSE_HEADER_DONE) {

            /* a whole header has been parsed successfully */

            ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                           "http scgi header done");

            /*
             * if no "Server" and "Date" in header line,
             * then add the default headers
             */

            if (r->upstream->headers_in.server == NULL) {
                h = ngx_list_push(&r->upstream->headers_in.headers);
                if (h == NULL) {
                    return NGX_HTTP_INTERNAL_SERVER_ERROR;
                }

                h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
                                    ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r');

                h->key.len = sizeof("Server") - 1;
                h->key.data = (u_char *) "Server";
                if (!passenger_main_conf.show_version_in_header) {
                    if (clcf->server_tokens) {
                        h->value.data = (u_char *) (NGINX_VER " + " PROGRAM_NAME);
                    } else {
                        h->value.data = (u_char *) ("nginx + " PROGRAM_NAME);
                    }
                } else {
                    if (clcf->server_tokens) {
                        h->value.data = (u_char *) (NGINX_VER " + " PROGRAM_NAME " " PASSENGER_VERSION);
                    } else {
                        h->value.data = (u_char *) ("nginx + " PROGRAM_NAME " " PASSENGER_VERSION);
                    }
                }
                h->value.len = ngx_strlen(h->value.data);
                h->lowcase_key = (u_char *) "server";
            }

            if (r->upstream->headers_in.date == NULL) {
                h = ngx_list_push(&r->upstream->headers_in.headers);
                if (h == NULL) {
                    return NGX_HTTP_INTERNAL_SERVER_ERROR;
                }

                h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e');

                h->key.len = sizeof("Date") - 1;
                h->key.data = (u_char *) "Date";
                h->value.len = 0;
                h->value.data = NULL;
                h->lowcase_key = (u_char *) "date";
            }

            /* Process "Status" header. */

            u = r->upstream;

            if (u->headers_in.status_n) {
                goto done;
            }

            if (u->headers_in.status) {
                status_line = &u->headers_in.status->value;

                status = ngx_atoi(status_line->data, 3);
                if (status == NGX_ERROR) {
                    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                  "upstream sent invalid status \"%V\"",
                                  status_line);
                    return NGX_HTTP_UPSTREAM_INVALID_HEADER;
                }

                u->headers_in.status_n = status;
                u->headers_in.status_line = *status_line;

            } else if (u->headers_in.location) {
                u->headers_in.status_n = 302;
                ngx_str_set(&u->headers_in.status_line,
                            "302 Moved Temporarily");

            } else {
                u->headers_in.status_n = 200;
                ngx_str_set(&u->headers_in.status_line, "200 OK");
            }

            if (u->state && u->state->status == 0) {
                u->state->status = u->headers_in.status_n;
            }

        done:

            /* Supported since Nginx 1.3.15. */
            #ifdef NGX_HTTP_SWITCHING_PROTOCOLS
                if (u->headers_in.status_n == NGX_HTTP_SWITCHING_PROTOCOLS
                    && r->headers_in.upgrade)
                {
                    u->upgrade = 1;
                }
            #endif

            return NGX_OK;
        }

        if (rc == NGX_AGAIN) {
            return NGX_AGAIN;
        }

        /* there was error while a header line parsing */

        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                      "upstream sent invalid header");

        return NGX_HTTP_UPSTREAM_INVALID_HEADER;
    }
}
static ngx_int_t
zupstream_upstream_process_header(ngx_http_request_t *r)
{
    ngx_int_t                       rc;
    ngx_table_elt_t                *h;
    ngx_http_upstream_header_t     *hh;
    ngx_http_upstream_main_conf_t  *umcf;

    umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);

    for ( ;; )
    {

        rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);

        if (rc == NGX_OK)
        {

            h = ngx_list_push(&r->upstream->headers_in.headers);
            if (h == NULL)
            {
                return NGX_ERROR;
            }

            h->hash = r->header_hash;

            h->key.len = r->header_name_end - r->header_name_start;
            h->value.len = r->header_end - r->header_start;

            h->key.data = ngx_pnalloc(r->pool,
                                      h->key.len + 1 + h->value.len + 1 + h->key.len);
            if (h->key.data == NULL)
            {
                return NGX_ERROR;
            }

            h->value.data = h->key.data + h->key.len + 1;
            h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;

            ngx_memcpy(h->key.data, r->header_name_start, h->key.len);
            h->key.data[h->key.len] = '\0';
            ngx_memcpy(h->value.data, r->header_start, h->value.len);
            h->value.data[h->value.len] = '\0';

            if (h->key.len == r->lowcase_index)
            {
                ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
            }
            else
            {
                ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
            }


            hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
                               h->lowcase_key, h->key.len);

            if (hh && hh->handler(r, h, hh->offset) != NGX_OK)
            {
                return NGX_ERROR;
            }

            continue;
        }

        if (rc == NGX_HTTP_PARSE_HEADER_DONE)
        {
            if (r->upstream->headers_in.server == NULL)
            {
                h = ngx_list_push(&r->upstream->headers_in.headers);
                if (h == NULL)
                {
                    return NGX_ERROR;
                }

                h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
                                                         ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r');

                ngx_str_set(&h->key, "Server");
                ngx_str_null(&h->value);
                h->lowcase_key = (u_char *) "server";
            }

            if (r->upstream->headers_in.date == NULL)
            {
                h = ngx_list_push(&r->upstream->headers_in.headers);
                if (h == NULL)
                {
                    return NGX_ERROR;
                }

                h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e');

                ngx_str_set(&h->key, "Date");
                ngx_str_null(&h->value);
                h->lowcase_key = (u_char *) "date";
            }

            return NGX_OK;
        }

        if (rc == NGX_AGAIN)
        {
            return NGX_AGAIN;
        }

        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                      "upstream sent invalid header");

        return NGX_HTTP_UPSTREAM_INVALID_HEADER;
    }
}
static ngx_int_t
ngx_http_headers_more_validate_host(ngx_str_t *host, ngx_pool_t *pool,
    ngx_uint_t alloc)
{
    u_char  *h, ch;
    size_t   i, dot_pos, host_len;

    enum {
        sw_usual = 0,
        sw_literal,
        sw_rest
    } state;

    dot_pos = host->len;
    host_len = host->len;

    h = host->data;

    state = sw_usual;

    for (i = 0; i < host->len; i++) {
        ch = h[i];

        switch (ch) {

        case '.':
            if (dot_pos == i - 1) {
                return NGX_DECLINED;
            }
            dot_pos = i;
            break;

        case ':':
            if (state == sw_usual) {
                host_len = i;
                state = sw_rest;
            }
            break;

        case '[':
            if (i == 0) {
                state = sw_literal;
            }
            break;

        case ']':
            if (state == sw_literal) {
                host_len = i + 1;
                state = sw_rest;
            }
            break;

        case '\0':
            return NGX_DECLINED;

        default:

            if (ngx_path_separator(ch)) {
                return NGX_DECLINED;
            }

            if (ch >= 'A' && ch <= 'Z') {
                alloc = 1;
            }

            break;
        }
    }

    if (dot_pos == host_len - 1) {
        host_len--;
    }

    if (host_len == 0) {
        return NGX_DECLINED;
    }

    if (alloc) {
        host->data = ngx_pnalloc(pool, host_len);
        if (host->data == NULL) {
            return NGX_ERROR;
        }

        ngx_strlow(host->data, h, host_len);
    }

    host->len = host_len;

    return NGX_OK;
}
static ngx_int_t
ngx_http_set_header_helper(ngx_http_request_t *r,
        ngx_http_headers_more_header_val_t *hv, ngx_str_t *value,
        ngx_table_elt_t **output_header, ngx_flag_t no_create)
{
    ngx_table_elt_t             *h;
    ngx_list_part_t             *part;
    ngx_uint_t                  i;
    ngx_flag_t                  matched = 0;

    dd_enter();

    part = &r->headers_out.headers.part;
    h = part->elts;

    for (i = 0; /* void */; i++) {
        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            h = part->elts;
            i = 0;
        }

        if (
            (!hv->wildcard && (h[i].key.len == hv->key.len
                && ngx_strncasecmp(h[i].key.data,
                    hv->key.data,
                                   h[i].key.len) == 0))
            ||
            (hv->wildcard && (h[i].key.len >= hv->key.len-1
                && ngx_strncasecmp(h[i].key.data,
                    hv->key.data,
                                   hv->key.len-1) == 0))
            )
        {
            if (value->len == 0) {
                dd("clearing normal header for %.*s", (int) hv->key.len,
                        hv->key.data);

                h[i].value.len = 0;
                h[i].hash = 0;

            } else {
                h[i].value = *value;
                h[i].hash = 1;
            }

            if (output_header) {
                *output_header = &h[i];
            }

            matched = 1;
        }
    }

    if (matched){
      return NGX_OK;
    }

    if ((hv->wildcard || no_create) && value->len == 0) {
        return NGX_OK;
    }

    /* XXX we still need to create header slot even if the value
     * is empty because some builtin headers like Last-Modified
     * relies on this to get cleared */

    h = ngx_list_push(&r->headers_out.headers);

    if (h == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (value->len == 0) {
        h->hash = 0;

    } else {
        h->hash = hv->hash;
    }

    h->key = hv->key;
    h->value = *value;

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    if (output_header) {
        *output_header = h;
    }

    return NGX_OK;
}
static ngx_int_t
ngx_http_srcache_set_content_length_header(ngx_http_request_t *r, off_t len)
{
    ngx_table_elt_t                 *h, *header;
    u_char                          *p;
    ngx_list_part_t                 *part;
    ngx_http_request_t              *pr;
    ngx_uint_t                       i;

    r->headers_in.content_length_n = len;

    if (ngx_list_init(&r->headers_in.headers, r->pool, 20,
                      sizeof(ngx_table_elt_t))
        != NGX_OK)
    {
        return NGX_ERROR;
    }

    h = ngx_list_push(&r->headers_in.headers);
    if (h == NULL) {
        return NGX_ERROR;
    }

    h->key = ngx_http_srcache_content_length_header_key;
    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    r->headers_in.content_length = h;

    p = ngx_palloc(r->pool, NGX_OFF_T_LEN);
    if (p == NULL) {
        return NGX_ERROR;
    }

    h->value.data = p;

    h->value.len = ngx_sprintf(h->value.data, "%O", len) - h->value.data;

    h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(
            ngx_hash(ngx_hash(ngx_hash(ngx_hash(ngx_hash(
            ngx_hash('c', 'o'), 'n'), 't'), 'e'), 'n'), 't'), '-'), 'l'), 'e'),
            'n'), 'g'), 't'), 'h');

    dd("r content length: %.*s",
       (int)r->headers_in.content_length->value.len,
       r->headers_in.content_length->value.data);

    pr = r->parent;

    if (pr == NULL) {
        return NGX_OK;
    }

    /* forward the parent request's all other request headers */

    part = &pr->headers_in.headers.part;
    header = part->elts;

    for (i = 0; /* void */; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            header = part->elts;
            i = 0;
        }

        if (header[i].key.len == sizeof("Content-Length") - 1
            && ngx_strncasecmp(header[i].key.data,
                               (u_char *) "Content-Length",
                               sizeof("Content-Length") - 1) == 0)
        {
            continue;
        }

        h = ngx_list_push(&r->headers_in.headers);
        if (h == NULL) {
            return NGX_ERROR;
        }

        *h = header[i];
    }

    /* XXX maybe we should set those built-in header slot in
     * ngx_http_headers_in_t too? */

    return NGX_OK;
}
Example #27
0
ngx_cycle_t *
ngx_init_cycle(ngx_cycle_t *old_cycle)
{
    void                *rv;
    char               **senv, **env;
    ngx_uint_t           i, n;
    ngx_log_t           *log;
    ngx_time_t          *tp;
    ngx_conf_t           conf;
    ngx_pool_t          *pool;
    ngx_cycle_t         *cycle, **old;
    ngx_shm_zone_t      *shm_zone, *oshm_zone;
    ngx_list_part_t     *part, *opart;
    ngx_open_file_t     *file;
    ngx_listening_t     *ls, *nls;
    ngx_core_conf_t     *ccf, *old_ccf;
    ngx_core_module_t   *module;
    char                 hostname[NGX_MAXHOSTNAMELEN];

    ngx_timezone_update();

    /* force localtime update with a new timezone */

    tp = ngx_timeofday();
    tp->sec = 0;

    ngx_time_update();


    log = old_cycle->log;

    pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
    if (pool == NULL) {
        return NULL;
    }
    pool->log = log;

    cycle = ngx_pcalloc(pool, sizeof(ngx_cycle_t));
    if (cycle == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->pool = pool;
    cycle->log = log;
    cycle->old_cycle = old_cycle;

    cycle->conf_prefix.len = old_cycle->conf_prefix.len;
    cycle->conf_prefix.data = ngx_pstrdup(pool, &old_cycle->conf_prefix);
    if (cycle->conf_prefix.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->prefix.len = old_cycle->prefix.len;
    cycle->prefix.data = ngx_pstrdup(pool, &old_cycle->prefix);
    if (cycle->prefix.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->conf_file.len = old_cycle->conf_file.len;
    cycle->conf_file.data = ngx_pnalloc(pool, old_cycle->conf_file.len + 1);
    if (cycle->conf_file.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }
    ngx_cpystrn(cycle->conf_file.data, old_cycle->conf_file.data,
                old_cycle->conf_file.len + 1);

    cycle->conf_param.len = old_cycle->conf_param.len;
    cycle->conf_param.data = ngx_pstrdup(pool, &old_cycle->conf_param);
    if (cycle->conf_param.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }


    n = old_cycle->paths.nelts ? old_cycle->paths.nelts : 10;

    cycle->paths.elts = ngx_pcalloc(pool, n * sizeof(ngx_path_t *));
    if (cycle->paths.elts == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->paths.nelts = 0;
    cycle->paths.size = sizeof(ngx_path_t *);
    cycle->paths.nalloc = n;
    cycle->paths.pool = pool;


    if (old_cycle->open_files.part.nelts) {
        n = old_cycle->open_files.part.nelts;
        for (part = old_cycle->open_files.part.next; part; part = part->next) {
            n += part->nelts;
        }

    } else {
        n = 20;
    }

    if (ngx_list_init(&cycle->open_files, pool, n, sizeof(ngx_open_file_t))
        != NGX_OK)
    {
        ngx_destroy_pool(pool);
        return NULL;
    }


    if (old_cycle->shared_memory.part.nelts) {
        n = old_cycle->shared_memory.part.nelts;
        for (part = old_cycle->shared_memory.part.next; part; part = part->next)
        {
            n += part->nelts;
        }

    } else {
        n = 1;
    }

    if (ngx_list_init(&cycle->shared_memory, pool, n, sizeof(ngx_shm_zone_t))
        != NGX_OK)
    {
        ngx_destroy_pool(pool);
        return NULL;
    }

    n = old_cycle->listening.nelts ? old_cycle->listening.nelts : 10;

    cycle->listening.elts = ngx_pcalloc(pool, n * sizeof(ngx_listening_t));
    if (cycle->listening.elts == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    cycle->listening.nelts = 0;
    cycle->listening.size = sizeof(ngx_listening_t);
    cycle->listening.nalloc = n;
    cycle->listening.pool = pool;


    ngx_queue_init(&cycle->reusable_connections_queue);


    cycle->conf_ctx = ngx_pcalloc(pool, ngx_max_module * sizeof(void *));
    if (cycle->conf_ctx == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }


    if (gethostname(hostname, NGX_MAXHOSTNAMELEN) == -1) {
        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "gethostname() failed");
        ngx_destroy_pool(pool);
        return NULL;
    }

    /* on Linux gethostname() silently truncates name that does not fit */

    hostname[NGX_MAXHOSTNAMELEN - 1] = '\0';
    cycle->hostname.len = ngx_strlen(hostname);

    cycle->hostname.data = ngx_pnalloc(pool, cycle->hostname.len);
    if (cycle->hostname.data == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    ngx_strlow(cycle->hostname.data, (u_char *) hostname, cycle->hostname.len);


    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_CORE_MODULE) {
            continue;
        }

        module = ngx_modules[i]->ctx;

        if (module->create_conf) {
            rv = module->create_conf(cycle);
            if (rv == NULL) {
                ngx_destroy_pool(pool);
                return NULL;
            }
            cycle->conf_ctx[ngx_modules[i]->index] = rv;
        }
    }


    senv = environ;


    ngx_memzero(&conf, sizeof(ngx_conf_t));
    /* STUB: init array ? */
    conf.args = ngx_array_create(pool, 10, sizeof(ngx_str_t));
    if (conf.args == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    conf.temp_pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
    if (conf.temp_pool == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }


    conf.ctx = cycle->conf_ctx;
    conf.cycle = cycle;
    conf.pool = pool;
    conf.log = log;
    conf.module_type = NGX_CORE_MODULE;
    conf.cmd_type = NGX_MAIN_CONF;

#if 0
    log->log_level = NGX_LOG_DEBUG_ALL;
#endif

    if (ngx_conf_param(&conf) != NGX_CONF_OK) {
        environ = senv;
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    if (ngx_conf_parse(&conf, &cycle->conf_file) != NGX_CONF_OK) {
        environ = senv;
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    if (ngx_test_config && !ngx_quiet_mode) {
        ngx_log_stderr(0, "the configuration file %s syntax is ok",
                       cycle->conf_file.data);
    }

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_CORE_MODULE) {
            continue;
        }

        module = ngx_modules[i]->ctx;

        if (module->init_conf) {
            if (module->init_conf(cycle, cycle->conf_ctx[ngx_modules[i]->index])
                == NGX_CONF_ERROR)
            {
                environ = senv;
                ngx_destroy_cycle_pools(&conf);
                return NULL;
            }
        }
    }

    if (ngx_process == NGX_PROCESS_SIGNALLER) {
        return cycle;
    }

    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);

    if (ngx_test_config) {

        if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
            goto failed;
        }

    } else if (!ngx_is_init_cycle(old_cycle)) {

        /*
         * we do not create the pid file in the first ngx_init_cycle() call
         * because we need to write the demonized process pid
         */

        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
                                                   ngx_core_module);
        if (ccf->pid.len != old_ccf->pid.len
            || ngx_strcmp(ccf->pid.data, old_ccf->pid.data) != 0)
        {
            /* new pid file name */

            if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
                goto failed;
            }

            ngx_delete_pidfile(old_cycle);
        }
    }


    if (ngx_test_lockfile(cycle->lock_file.data, log) != NGX_OK) {
        goto failed;
    }


    if (ngx_create_paths(cycle, ccf->user) != NGX_OK) {
        goto failed;
    }


    if (ngx_log_open_default(cycle) != NGX_OK) {
        goto failed;
    }

    /* open the new files */

    part = &cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].name.len == 0) {
            continue;
        }

        file[i].fd = ngx_open_file(file[i].name.data,
                                   NGX_FILE_APPEND,
                                   NGX_FILE_CREATE_OR_OPEN,
                                   NGX_FILE_DEFAULT_ACCESS);

        ngx_log_debug3(NGX_LOG_DEBUG_CORE, log, 0,
                       "log: %p %d \"%s\"",
                       &file[i], file[i].fd, file[i].name.data);

        if (file[i].fd == NGX_INVALID_FILE) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_open_file_n " \"%s\" failed",
                          file[i].name.data);
            goto failed;
        }

#if !(NGX_WIN32)
        if (fcntl(file[i].fd, F_SETFD, FD_CLOEXEC) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          "fcntl(FD_CLOEXEC) \"%s\" failed",
                          file[i].name.data);
            goto failed;
        }
#endif
    }

    cycle->log = &cycle->new_log;
    pool->log = &cycle->new_log;


    /* create shared memory */

    part = &cycle->shared_memory.part;
    shm_zone = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            shm_zone = part->elts;
            i = 0;
        }

        if (shm_zone[i].shm.size == 0) {
            ngx_log_error(NGX_LOG_EMERG, log, 0,
                          "zero size shared memory zone \"%V\"",
                          &shm_zone[i].shm.name);
            goto failed;
        }

        shm_zone[i].shm.log = cycle->log;

        opart = &old_cycle->shared_memory.part;
        oshm_zone = opart->elts;

        for (n = 0; /* void */ ; n++) {

            if (n >= opart->nelts) {
                if (opart->next == NULL) {
                    break;
                }
                opart = opart->next;
                oshm_zone = opart->elts;
                n = 0;
            }

            if (shm_zone[i].shm.name.len != oshm_zone[n].shm.name.len) {
                continue;
            }

            if (ngx_strncmp(shm_zone[i].shm.name.data,
                            oshm_zone[n].shm.name.data,
                            shm_zone[i].shm.name.len)
                != 0)
            {
                continue;
            }

            if (shm_zone[i].tag == oshm_zone[n].tag
                && shm_zone[i].shm.size == oshm_zone[n].shm.size)
            {
                shm_zone[i].shm.addr = oshm_zone[n].shm.addr;

                if (shm_zone[i].init(&shm_zone[i], oshm_zone[n].data)
                    != NGX_OK)
                {
                    goto failed;
                }

                goto shm_zone_found;
            }

            ngx_shm_free(&oshm_zone[n].shm);

            break;
        }

        if (ngx_shm_alloc(&shm_zone[i].shm) != NGX_OK) {
            goto failed;
        }

        if (ngx_init_zone_pool(cycle, &shm_zone[i]) != NGX_OK) {
            goto failed;
        }

        if (shm_zone[i].init(&shm_zone[i], NULL) != NGX_OK) {
            goto failed;
        }

    shm_zone_found:

        continue;
    }


    /* handle the listening sockets */

    if (old_cycle->listening.nelts) {
        ls = old_cycle->listening.elts;
        for (i = 0; i < old_cycle->listening.nelts; i++) {
            ls[i].remain = 0;
        }

        nls = cycle->listening.elts;
        for (n = 0; n < cycle->listening.nelts; n++) {

            for (i = 0; i < old_cycle->listening.nelts; i++) {
                if (ls[i].ignore) {
                    continue;
                }

                if (ngx_cmp_sockaddr(nls[n].sockaddr, ls[i].sockaddr) == NGX_OK)
                {
                    nls[n].fd = ls[i].fd;
                    nls[n].previous = &ls[i];
                    ls[i].remain = 1;

                    if (ls[n].backlog != nls[i].backlog) {
                        nls[n].listen = 1;
                    }

#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)

                    /*
                     * FreeBSD, except the most recent versions,
                     * could not remove accept filter
                     */
                    nls[n].deferred_accept = ls[i].deferred_accept;

                    if (ls[i].accept_filter && nls[n].accept_filter) {
                        if (ngx_strcmp(ls[i].accept_filter,
                                       nls[n].accept_filter)
                            != 0)
                        {
                            nls[n].delete_deferred = 1;
                            nls[n].add_deferred = 1;
                        }

                    } else if (ls[i].accept_filter) {
                        nls[n].delete_deferred = 1;

                    } else if (nls[n].accept_filter) {
                        nls[n].add_deferred = 1;
                    }
#endif

#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)

                    if (ls[n].deferred_accept && !nls[n].deferred_accept) {
                        nls[n].delete_deferred = 1;

                    } else if (ls[i].deferred_accept != nls[n].deferred_accept)
                    {
                        nls[n].add_deferred = 1;
                    }
#endif
                    break;
                }
            }

            if (nls[n].fd == (ngx_socket_t) -1) {
                nls[n].open = 1;
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
                if (nls[n].accept_filter) {
                    nls[n].add_deferred = 1;
                }
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
                if (nls[n].deferred_accept) {
                    nls[n].add_deferred = 1;
                }
#endif
            }
        }

    } else {
        ls = cycle->listening.elts;
        for (i = 0; i < cycle->listening.nelts; i++) {
            ls[i].open = 1;
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
            if (ls[i].accept_filter) {
                ls[i].add_deferred = 1;
            }
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
            if (ls[i].deferred_accept) {
                ls[i].add_deferred = 1;
            }
#endif
        }
    }

    if (ngx_open_listening_sockets(cycle) != NGX_OK) {
        goto failed;
    }

    if (!ngx_test_config) {
        ngx_configure_listening_sockets(cycle);
    }


    /* commit the new cycle configuration */

    if (!ngx_use_stderr) {
        (void) ngx_log_redirect_stderr(cycle);
    }

    pool->log = cycle->log;

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->init_module) {
            if (ngx_modules[i]->init_module(cycle) != NGX_OK) {
                /* fatal */
                exit(1);
            }
        }
    }


    /* close and delete stuff that lefts from an old cycle */

    /* free the unnecessary shared memory */

    opart = &old_cycle->shared_memory.part;
    oshm_zone = opart->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= opart->nelts) {
            if (opart->next == NULL) {
                goto old_shm_zone_done;
            }
            opart = opart->next;
            oshm_zone = opart->elts;
            i = 0;
        }

        part = &cycle->shared_memory.part;
        shm_zone = part->elts;

        for (n = 0; /* void */ ; n++) {

            if (n >= part->nelts) {
                if (part->next == NULL) {
                    break;
                }
                part = part->next;
                shm_zone = part->elts;
                n = 0;
            }

            if (oshm_zone[i].shm.name.len == shm_zone[n].shm.name.len
                && ngx_strncmp(oshm_zone[i].shm.name.data,
                               shm_zone[n].shm.name.data,
                               oshm_zone[i].shm.name.len)
                == 0)
            {
                goto live_shm_zone;
            }
        }

        ngx_shm_free(&oshm_zone[i].shm);

    live_shm_zone:

        continue;
    }

old_shm_zone_done:


    /* close the unnecessary listening sockets */

    ls = old_cycle->listening.elts;
    for (i = 0; i < old_cycle->listening.nelts; i++) {

        if (ls[i].remain || ls[i].fd == (ngx_socket_t) -1) {
            continue;
        }

        if (ngx_close_socket(ls[i].fd) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                          ngx_close_socket_n " listening socket on %V failed",
                          &ls[i].addr_text);
        }

#if (NGX_HAVE_UNIX_DOMAIN)

        if (ls[i].sockaddr->sa_family == AF_UNIX) {
            u_char  *name;

            name = ls[i].addr_text.data + sizeof("unix:") - 1;

            ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
                          "deleting socket %s", name);

            if (ngx_delete_file(name) == NGX_FILE_ERROR) {
                ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
                              ngx_delete_file_n " %s failed", name);
            }
        }

#endif
    }


    /* close the unnecessary open files */

    part = &old_cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
            continue;
        }

        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_close_file_n " \"%s\" failed",
                          file[i].name.data);
        }
    }

    ngx_destroy_pool(conf.temp_pool);

    if (ngx_process == NGX_PROCESS_MASTER || ngx_is_init_cycle(old_cycle)) {

        /*
         * perl_destruct() frees environ, if it is not the same as it was at
         * perl_construct() time, therefore we save the previous cycle
         * environment before ngx_conf_parse() where it will be changed.
         */

        env = environ;
        environ = senv;

        ngx_destroy_pool(old_cycle->pool);
        cycle->old_cycle = NULL;

        environ = env;

        return cycle;
    }


    if (ngx_temp_pool == NULL) {
        ngx_temp_pool = ngx_create_pool(128, cycle->log);
        if (ngx_temp_pool == NULL) {
            ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
                          "could not create ngx_temp_pool");
            exit(1);
        }

        n = 10;
        ngx_old_cycles.elts = ngx_pcalloc(ngx_temp_pool,
                                          n * sizeof(ngx_cycle_t *));
        if (ngx_old_cycles.elts == NULL) {
            exit(1);
        }
        ngx_old_cycles.nelts = 0;
        ngx_old_cycles.size = sizeof(ngx_cycle_t *);
        ngx_old_cycles.nalloc = n;
        ngx_old_cycles.pool = ngx_temp_pool;

        ngx_cleaner_event.handler = ngx_clean_old_cycles;
        ngx_cleaner_event.log = cycle->log;
        ngx_cleaner_event.data = &dumb;
        dumb.fd = (ngx_socket_t) -1;
    }

    ngx_temp_pool->log = cycle->log;

    old = ngx_array_push(&ngx_old_cycles);
    if (old == NULL) {
        exit(1);
    }
    *old = old_cycle;

    if (!ngx_cleaner_event.timer_set) {
        ngx_add_timer(&ngx_cleaner_event, 30000);
        ngx_cleaner_event.timer_set = 1;
    }

    return cycle;


failed:

    if (!ngx_is_init_cycle(old_cycle)) {
        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
                                                   ngx_core_module);
        if (old_ccf->environment) {
            environ = old_ccf->environment;
        }
    }

    /* rollback the new cycle configuration */

    part = &cycle->open_files.part;
    file = part->elts;

    for (i = 0; /* void */ ; i++) {

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }
            part = part->next;
            file = part->elts;
            i = 0;
        }

        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
            continue;
        }

        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                          ngx_close_file_n " \"%s\" failed",
                          file[i].name.data);
        }
    }

    if (ngx_test_config) {
        ngx_destroy_cycle_pools(&conf);
        return NULL;
    }

    ls = cycle->listening.elts;
    for (i = 0; i < cycle->listening.nelts; i++) {
        if (ls[i].fd == (ngx_socket_t) -1 || !ls[i].open) {
            continue;
        }

        if (ngx_close_socket(ls[i].fd) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                          ngx_close_socket_n " %V failed",
                          &ls[i].addr_text);
        }
    }

    ngx_destroy_cycle_pools(&conf);

    return NULL;
}
ngx_int_t
ngx_http_srcache_process_header(ngx_http_request_t *r, ngx_buf_t *b)
{
    ngx_int_t                       rc;
    ngx_table_elt_t                 header;
    ngx_http_srcache_ctx_t         *ctx;
    off_t                           len, rest;
    unsigned                        truncate;
    u_char                         *p;
    ngx_http_srcache_header_t      *hh;
    ngx_http_srcache_main_conf_t   *smcf;

    smcf = ngx_http_get_module_main_conf(r, ngx_http_srcache_filter_module);

    ctx = ngx_http_get_module_ctx(r, ngx_http_srcache_filter_module);

    for ( ;; ) {

        len = b->last - b->pos;
        rest = ctx->header_buf->end - ctx->header_buf->last;

        dd("len: %d, rest: %d", (int) len, (int) rest);

        if (len > rest) {
            len = rest;
            truncate = 1;

        } else {
            truncate = 0;
        }

        ctx->header_buf->last = ngx_copy(ctx->header_buf->last, b->pos,
                                         (size_t) len);

        p = ctx->header_buf->pos;

        rc = ngx_http_parse_header_line(r, ctx->header_buf, 1);

        b->pos += ctx->header_buf->pos - p;

        if (rc == NGX_OK) {

            /* a header line has been parsed successfully */

            ngx_memzero(&header, sizeof(ngx_table_elt_t));

            header.hash = r->header_hash;

            header.key.len = r->header_name_end - r->header_name_start;
            header.value.len = r->header_end - r->header_start;

            header.key.data = ngx_pnalloc(r->pool,
                                          header.key.len + 1
                                          + header.value.len + 1
                                          + header.key.len);

            if (header.key.data == NULL) {
                return NGX_ERROR;
            }

            header.value.data = header.key.data + header.key.len + 1;
            header.lowcase_key = header.key.data + header.key.len + 1
                                 + header.value.len + 1;

            ngx_cpystrn(header.key.data, r->header_name_start,
                        header.key.len + 1);

            ngx_cpystrn(header.value.data, r->header_start,
                        header.value.len + 1);

            if (header.key.len == r->lowcase_index) {
                ngx_memcpy(header.lowcase_key, r->lowcase_header,
                           header.key.len);

            } else {
                ngx_strlow(header.lowcase_key, header.key.data, header.key.len);
            }

            hh = ngx_hash_find(&smcf->headers_in_hash, header.hash,
                               header.lowcase_key, header.key.len);

            if (hh) {
                if (hh->handler(r->parent, &header, hh->offset) != NGX_OK) {
                    return NGX_ERROR;
                }

            } else {

                if (ngx_http_srcache_process_header_line(r->parent, &header, 0)
                    != NGX_OK)
                {
                    return NGX_ERROR;
                }
            }

            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                           "srcache_fetch header: \"%V: %V\"",
                           &header.key, &header.value);

            ctx->header_buf->pos = ctx->header_buf->start;
            ctx->header_buf->last = ctx->header_buf->start;

            continue;
        }

        if (rc == NGX_HTTP_PARSE_HEADER_DONE) {

            /* a whole header has been parsed successfully */

            ctx->header_buf->pos = ctx->header_buf->start;
            ctx->header_buf->last = ctx->header_buf->start;
            ngx_pfree(r->pool, ctx->header_buf->start);

            ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                           "srcache_fetch header done");

            return NGX_OK;
        }

        if (rc == NGX_AGAIN) {
            if (truncate) {
                ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                              "srcache_fetch: header buffer overflown "
                              "(maybe you should consider increasing "
                              "srcache_header_buffer_size?)");

                ctx->header_buf->pos = ctx->header_buf->start;
                ctx->header_buf->last = ctx->header_buf->start;
                ngx_pfree(r->pool, ctx->header_buf->start);

                return NGX_ERROR;
            }

            return NGX_AGAIN;
        }

        /* there was error while a header line parsing */

        ctx->header_buf->pos = ctx->header_buf->start;
        ctx->header_buf->last = ctx->header_buf->start;
        ngx_pfree(r->pool, ctx->header_buf->start);

        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                      "srcache_fetch: cache sent invalid header");

        return NGX_ERROR;
    }
}
static ngx_int_t
ngx_http_set_header_helper(ngx_http_request_t *r,
        ngx_http_headers_more_header_val_t *hv, ngx_str_t *value,
        ngx_table_elt_t **output_header)
{
    ngx_table_elt_t             *h;
    ngx_list_part_t             *part;
    ngx_uint_t                   i;
    ngx_uint_t                   rc;

    dd_enter();

retry:
    part = &r->headers_in.headers.part;
    h = part->elts;

    for (i = 0; /* void */; i++) {
        dd("i: %d, part: %p", (int) i, part);

        if (i >= part->nelts) {
            if (part->next == NULL) {
                break;
            }

            part = part->next;
            h = part->elts;
            i = 0;
        }

        if (h[i].key.len == hv->key.len
                && ngx_strncasecmp(h[i].key.data,
                    hv->key.data,
                    h[i].key.len) == 0)
        {
            if (value->len == 0) {
                h[i].hash = 0;

                rc = ngx_http_headers_more_rm_header_helper(
                        &r->headers_in.headers, part, i);

                if (rc == NGX_OK) {
                    if (output_header) {
                        *output_header = NULL;
                    }

                    goto retry;
                }
            }

            h[i].value = *value;

            if (output_header) {
                *output_header = &h[i];
                dd("setting existing builtin input header");
            }

            return NGX_OK;
        }
    }

    if (value->len == 0 || hv->replace) {
        return NGX_OK;
    }

    h = ngx_list_push(&r->headers_in.headers);

    if (h == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    dd("created new header for %.*s", (int) hv->key.len, hv->key.data);

    if (value->len == 0) {
        h->hash = 0;

    } else {
        h->hash = hv->hash;
    }

    h->key = hv->key;
    h->value = *value;

    h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
    if (h->lowcase_key == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    ngx_strlow(h->lowcase_key, h->key.data, h->key.len);

    if (output_header) {
        *output_header = h;

        while (r != r->main) {
            r->parent->headers_in = r->headers_in;
            r = r->parent;
        }
    }

    return NGX_OK;
}
Example #30
0
ngx_int_t
ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names, ngx_uint_t nelts)
{
    u_char          *elts;
    size_t           len;
    u_short         *test;
    ngx_uint_t       i, n, key, size, start, bucket_size;
    ngx_hash_elt_t  *elt, **buckets;

    for (n = 0; n < nelts; n++) {
        if (hinit->bucket_size < NGX_HASH_ELT_SIZE(&names[n]) + sizeof(void *))
        {
            ngx_log_error(NGX_LOG_EMERG, hinit->pool->log, 0,
                          "could not build the %s, you should "
                          "increase %s_bucket_size: %i",
                          hinit->name, hinit->name, hinit->bucket_size);
            return NGX_ERROR;
        }
    }

    test = ngx_alloc(hinit->max_size * sizeof(u_short), hinit->pool->log);
    if (test == NULL) {
        return NGX_ERROR;
    }

    bucket_size = hinit->bucket_size - sizeof(void *);

    start = nelts / (bucket_size / (2 * sizeof(void *)));
    start = start ? start : 1;

    if (hinit->max_size > 10000 && nelts && hinit->max_size / nelts < 100) {
        start = hinit->max_size - 1000;
    }

    for (size = start; size <= hinit->max_size; size++) {

        ngx_memzero(test, size * sizeof(u_short));

        for (n = 0; n < nelts; n++) {
            if (names[n].key.data == NULL) {
                continue;
            }

            key = names[n].key_hash % size;
            test[key] = (u_short) (test[key] + NGX_HASH_ELT_SIZE(&names[n]));

#if 0
            ngx_log_error(NGX_LOG_ALERT, hinit->pool->log, 0,
                          "%ui: %ui %ui \"%V\"",
                          size, key, test[key], &names[n].key);
#endif

            if (test[key] > (u_short) bucket_size) {
                goto next;
            }
        }

        goto found;

    next:

        continue;
    }

    ngx_log_error(NGX_LOG_WARN, hinit->pool->log, 0,
                  "could not build optimal %s, you should increase "
                  "either %s_max_size: %i or %s_bucket_size: %i; "
                  "ignoring %s_bucket_size",
                  hinit->name, hinit->name, hinit->max_size,
                  hinit->name, hinit->bucket_size, hinit->name);

found:

    for (i = 0; i < size; i++) {
        test[i] = sizeof(void *);
    }

    for (n = 0; n < nelts; n++) {
        if (names[n].key.data == NULL) {
            continue;
        }

        key = names[n].key_hash % size;
        test[key] = (u_short) (test[key] + NGX_HASH_ELT_SIZE(&names[n]));
    }

    len = 0;

    for (i = 0; i < size; i++) {
        if (test[i] == sizeof(void *)) {
            continue;
        }

        test[i] = (u_short) (ngx_align(test[i], ngx_cacheline_size));

        len += test[i];
    }

    if (hinit->hash == NULL) {
        hinit->hash = ngx_pcalloc(hinit->pool, sizeof(ngx_hash_wildcard_t)
                                             + size * sizeof(ngx_hash_elt_t *));
        if (hinit->hash == NULL) {
            ngx_free(test);
            return NGX_ERROR;
        }

        buckets = (ngx_hash_elt_t **)
                      ((u_char *) hinit->hash + sizeof(ngx_hash_wildcard_t));

    } else {
        buckets = ngx_pcalloc(hinit->pool, size * sizeof(ngx_hash_elt_t *));
        if (buckets == NULL) {
            ngx_free(test);
            return NGX_ERROR;
        }
    }

    elts = ngx_palloc(hinit->pool, len + ngx_cacheline_size);
    if (elts == NULL) {
        ngx_free(test);
        return NGX_ERROR;
    }

    elts = ngx_align_ptr(elts, ngx_cacheline_size);

    for (i = 0; i < size; i++) {
        if (test[i] == sizeof(void *)) {
            continue;
        }

        buckets[i] = (ngx_hash_elt_t *) elts;
        elts += test[i];

    }

    for (i = 0; i < size; i++) {
        test[i] = 0;
    }

    for (n = 0; n < nelts; n++) {
        if (names[n].key.data == NULL) {
            continue;
        }

        key = names[n].key_hash % size;
        elt = (ngx_hash_elt_t *) ((u_char *) buckets[key] + test[key]);

        elt->value = names[n].value;
        elt->len = (u_short) names[n].key.len;

        ngx_strlow(elt->name, names[n].key.data, names[n].key.len);

        test[key] = (u_short) (test[key] + NGX_HASH_ELT_SIZE(&names[n]));
    }

    for (i = 0; i < size; i++) {
        if (buckets[i] == NULL) {
            continue;
        }

        elt = (ngx_hash_elt_t *) ((u_char *) buckets[i] + test[i]);

        elt->value = NULL;
    }

    ngx_free(test);

    hinit->hash->buckets = buckets;
    hinit->hash->size = size;

#if 0

    for (i = 0; i < size; i++) {
        ngx_str_t   val;
        ngx_uint_t  key;

        elt = buckets[i];

        if (elt == NULL) {
            ngx_log_error(NGX_LOG_ALERT, hinit->pool->log, 0,
                          "%ui: NULL", i);
            continue;
        }

        while (elt->value) {
            val.len = elt->len;
            val.data = &elt->name[0];

            key = hinit->key(val.data, val.len);

            ngx_log_error(NGX_LOG_ALERT, hinit->pool->log, 0,
                          "%ui: %p \"%V\" %ui", i, elt, &val, key);

            elt = (ngx_hash_elt_t *) ngx_align_ptr(&elt->name[0] + elt->len,
                                                   sizeof(void *));
        }
    }

#endif

    return NGX_OK;
}