static ngx_int_t
ngx_http_gunzip_header_filter(ngx_http_request_t *r)
{
ngx_http_gunzip_ctx_t *ctx;
ngx_http_gunzip_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module);
/* TODO support multiple content-codings */
/* TODO ignore content encoding? */
if (conf->enable == NGX_HTTP_GUNZIP_OFF
|| r->headers_out.content_encoding == NULL
|| r->headers_out.content_encoding->value.len != 4
|| ngx_strncasecmp(r->headers_out.content_encoding->value.data,
(u_char *) "gzip", 4) != 0)
{
return ngx_http_next_header_filter(r);
}
r->gzip_vary = 1;
if (conf->enable == NGX_HTTP_GUNZIP_ON) {
if (!r->gzip_tested) {
if (ngx_http_gzip_ok(r) == NGX_OK) {
return ngx_http_next_header_filter(r);
}
} else if (r->gzip_ok) {
return ngx_http_next_header_filter(r);
}
} else if (conf->enable == NGX_HTTP_GUNZIP_ALWAYS
&& ngx_http_test_content_type(r, &conf->types) == NULL)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gunzip_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_gunzip_filter_module);
ctx->request = r;
r->filter_need_in_memory = 1;
r->headers_out.content_encoding->hash = 0;
r->headers_out.content_encoding = NULL;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_gzip_ok_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data)
{
char ok = '0';
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
if (!r->gzip_tested) {
ngx_http_gzip_ok(r);
}
if (r->gzip_ok) {
ok = '1';
}
v->data = ngx_pnalloc(r->pool, 2);
v->data[0] = ok;
v->data[1] = '\0';
v->len = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_gzip_static_handler(ngx_http_request_t *r)
{
u_char *p;
size_t root;
ngx_str_t path;
ngx_int_t rc;
ngx_uint_t level;
ngx_log_t *log;
ngx_buf_t *b;
ngx_chain_t out;
ngx_table_elt_t *h;
ngx_open_file_info_t of;
ngx_http_core_loc_conf_t *clcf;
ngx_http_gzip_static_conf_t *gzcf;
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
return NGX_DECLINED;
}
if (r->uri.data[r->uri.len - 1] == '/') {
return NGX_DECLINED;
}
gzcf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_static_module);
if (gzcf->enable == NGX_HTTP_GZIP_STATIC_OFF) {
return NGX_DECLINED;
}
if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
rc = ngx_http_gzip_ok(r);
} else {
/* always */
rc = NGX_OK;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (!clcf->gzip_vary && rc != NGX_OK) {
return NGX_DECLINED;
}
log = r->connection->log;
p = ngx_http_map_uri_to_path(r, &path, &root, sizeof(".gz") - 1);
if (p == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
*p++ = '.';
*p++ = 'g';
*p++ = 'z';
*p = '\0';
path.len = p - path.data;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http filename: \"%s\"", path.data);
ngx_memzero(&of, sizeof(ngx_open_file_info_t));
of.read_ahead = clcf->read_ahead;
of.directio = clcf->directio;
of.valid = clcf->open_file_cache_valid;
of.min_uses = clcf->open_file_cache_min_uses;
of.errors = clcf->open_file_cache_errors;
of.events = clcf->open_file_cache_events;
if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
!= NGX_OK)
{
switch (of.err) {
case 0:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
case NGX_ENOENT:
case NGX_ENOTDIR:
case NGX_ENAMETOOLONG:
return NGX_DECLINED;
case NGX_EACCES:
#if (NGX_HAVE_OPENAT)
case NGX_EMLINK:
case NGX_ELOOP:
#endif
level = NGX_LOG_ERR;
break;
default:
level = NGX_LOG_CRIT;
break;
}
ngx_log_error(level, log, of.err,
"%s \"%s\" failed", of.failed, path.data);
return NGX_DECLINED;
}
if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
r->gzip_vary = 1;
if (rc != NGX_OK) {
return NGX_DECLINED;
}
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd);
if (of.is_dir) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
return NGX_DECLINED;
}
#if !(NGX_WIN32) /* the not regular files are probably Unix specific */
if (!of.is_file) {
ngx_log_error(NGX_LOG_CRIT, log, 0,
"\"%s\" is not a regular file", path.data);
return NGX_HTTP_NOT_FOUND;
}
#endif
r->root_tested = !r->error_page;
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
log->action = "sending response to client";
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = of.size;
r->headers_out.last_modified_time = of.mtime;
if (ngx_http_set_etag(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ngx_http_set_content_type(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "Content-Encoding");
ngx_str_set(&h->value, "gzip");
r->headers_out.content_encoding = h;
/* we need to allocate all before the header would be sent */
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
if (b->file == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
b->file_pos = 0;
b->file_last = of.size;
b->in_file = b->file_last ? 1 : 0;
b->last_buf = (r == r->main) ? 1 : 0;
b->last_in_chain = 1;
b->file->fd = of.fd;
b->file->name = path;
b->file->log = log;
b->file->directio = of.is_directio;
out.buf = b;
out.next = NULL;
return ngx_http_output_filter(r, &out);
}
static ngx_int_t
ngx_http_gunzip_header_filter(ngx_http_request_t *r)
{
ngx_http_gunzip_ctx_t *ctx;
ngx_http_gunzip_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module);
/* TODO support multiple content-codings */
/* TODO always gunzip - due to configuration or module request */
/* TODO ignore content encoding? */
if (!conf->enable
|| r->headers_out.content_encoding == NULL
|| r->headers_out.content_encoding->value.len != 4
|| ngx_strncasecmp(r->headers_out.content_encoding->value.data,
(u_char *) "gzip", 4) != 0)
{
return ngx_http_next_header_filter(r);
}
#if (nginx_version >= 8025 || (nginx_version >= 7065 && nginx_version < 8000))
r->gzip_vary = 1;
if (!r->gzip_tested) {
if (ngx_http_gzip_ok(r) == NGX_OK) {
return ngx_http_next_header_filter(r);
}
} else if (!r->gzip_ok) {
return ngx_http_next_header_filter(r);
}
#else
if (ngx_http_gzip_ok(r) == NGX_OK) {
return ngx_http_next_header_filter(r);
}
#endif
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gunzip_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_gunzip_filter_module);
ctx->request = r;
r->filter_need_in_memory = 1;
r->headers_out.content_encoding->hash = 0;
r->headers_out.content_encoding = NULL;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_gzip_header_filter(ngx_http_request_t *r)
{
ngx_table_elt_t *h;
ngx_http_gzip_ctx_t *ctx;
ngx_http_gzip_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
if (!conf->enable
|| (r->headers_out.status != NGX_HTTP_OK
&& r->headers_out.status != NGX_HTTP_FORBIDDEN
&& r->headers_out.status != NGX_HTTP_NOT_FOUND)
|| (r->headers_out.content_encoding
&& r->headers_out.content_encoding->value.len)
|| (r->headers_out.content_length_n != -1
&& r->headers_out.content_length_n < conf->min_length)
|| ngx_http_test_content_type(r, &conf->types) == NULL
|| r->header_only)
{
return ngx_http_next_header_filter(r);
}
r->gzip_vary = 1;
#if (NGX_HTTP_DEGRADATION)
{
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->gzip_disable_degradation && ngx_http_degraded(r))
{
return ngx_http_next_header_filter(r);
}
}
#endif
if (!r->gzip_tested)
{
if (ngx_http_gzip_ok(r) != NGX_OK)
{
return ngx_http_next_header_filter(r);
}
}
else if (!r->gzip_ok)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
if (ctx == NULL)
{
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
ctx->request = r;
ctx->buffering = (conf->postpone_gzipping != 0);
ngx_http_gzip_filter_memory(r, ctx);
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL)
{
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "Content-Encoding");
ngx_str_set(&h->value, "gzip");
r->headers_out.content_encoding = h;
r->main_filter_need_in_memory = 1;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
