static in_addr_t
ngx_http_qqwry_real_addr(ngx_http_request_t *r, ngx_http_qqwry_ctx_t *qqwry)
{
struct sockaddr_in *sin;
ngx_http_variable_value_t *v;
if (qqwry->index == -1) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http qqwry started: %V", &r->connection->addr_text);
if (r->connection->sockaddr->sa_family != AF_INET) {
return 0;
}
sin = (struct sockaddr_in *) r->connection->sockaddr;
return ntohl(sin->sin_addr.s_addr);
}
v = ngx_http_get_flushed_variable(r, qqwry->index);
if (v == NULL || v->not_found) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http qqwry not found");
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http qqwry started: %v", v);
return ntohl(ngx_inet_addr(v->data, v->len));
}
ngx_http_variable_value_t *
ngx_http_get_variable(ngx_http_request_t *r, ngx_str_t *name, ngx_uint_t key)
{
ngx_http_variable_t *v;
ngx_http_variable_value_t *vv;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
//先根据哈希表查找变量是否存在，如果存在，则根据其保存在哈希表里面的index获取变量的内容。或者调用get_handler
v = ngx_hash_find(&cmcf->variables_hash, key, name->data, name->len);
if (v) {
if (v->flags & NGX_HTTP_VAR_INDEXED) {
return ngx_http_get_flushed_variable(r, v->index);
} else {
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv && v->get_handler(r, vv, v->data) == NGX_OK) {
return vv;
}
return NULL;
}
}
//如果不存在variables里面，则看一下是否是预定义的变量。
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv == NULL) {
return NULL;
}
if (ngx_strncmp(name->data, "http_", 5) == 0) {
if (ngx_http_variable_unknown_header_in(r, vv, (uintptr_t) name) == NGX_OK){
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "sent_http_", 10) == 0) {
if (ngx_http_variable_unknown_header_out(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "upstream_http_", 14) == 0) {
if (ngx_http_upstream_header_variable(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "cookie_", 7) == 0) {
if (ngx_http_variable_cookie(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "arg_", 4) == 0) {
if (ngx_http_variable_argument(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
vv->not_found = 1;
return vv;
}
static ngx_int_t
ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
size_t len;
u_char *name;
ngx_uint_t key, i;
ngx_http_variable_value_t *vv, *value;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http map started");
vv = ngx_http_get_flushed_variable(r, map->index);
if (vv == NULL || vv->not_found) {
*v = *map->default_value;
return NGX_OK;
}
len = vv->len;
if (len && map->hostnames && vv->data[len - 1] == '.') {
len--;
}
if (len == 0) {
*v = *map->default_value;
return NGX_OK;
}
name = ngx_palloc(r->pool, len);
if (name == NULL) {
return NGX_ERROR;
}
key = 0;
for (i = 0; i < len; i++) {
name[i] = ngx_tolower(vv->data[i]);
key = ngx_hash(key, name[i]);
}
value = ngx_hash_find_combined(&map->hash, key, name, len);
if (value) {
*v = *value;
} else {
*v = *map->default_value;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http map: \"%v\" \"%v\"", vv, v);
return NGX_OK;
}
static ngx_int_t
ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
size_t len;
ngx_str_t val;
ngx_uint_t key;
ngx_http_variable_value_t *value;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http map started");
if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) {
return NGX_ERROR;
}
len = val.len;
if (len && map->hostnames && val.data[len - 1] == '.') {
len--;
}
key = ngx_hash_strlow(val.data, val.data, len);
value = ngx_http_map_find(r, &map->map, key, val.data, len, &val);
if (value == NULL) {
value = map->default_value;
}
if (!value->valid) {
value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data);
if (value == NULL || value->not_found) {
value = &ngx_http_variable_null_value;
}
}
*v = *value;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http map: \"%v\" \"%v\"", &val, v);
return NGX_OK;
}
static ngx_int_t
ngx_http_reqstat_check_enable(ngx_http_request_t *r,
ngx_http_reqstat_conf_t **rlcf, ngx_http_reqstat_store_t **store)
{
ngx_http_reqstat_conf_t *rcf;
ngx_http_reqstat_store_t *s;
ngx_http_variable_value_t *v;
rcf = ngx_http_get_module_main_conf(r, ngx_http_reqstat_module);
if (r->variables[rcf->index].valid) {
v = ngx_http_get_flushed_variable(r, rcf->index);
if (v->data[0] == '0') {
return NGX_DECLINED;
}
s = (ngx_http_reqstat_store_t *) (*((uintptr_t *) &v->data[1]));
rcf = s->conf;
} else {
rcf = ngx_http_get_module_loc_conf(r, ngx_http_reqstat_module);
s = ngx_http_get_module_ctx(r, ngx_http_reqstat_module);
if (s == NULL) {
s = ngx_http_reqstat_create_store(r, rcf);
if (s == NULL) {
return NGX_ERROR;
}
}
if (s->bypass) {
return NGX_DECLINED;
}
}
*rlcf = rcf;
*store = s;
return NGX_OK;
}