/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#define NGX_HTTP_GZIP_STATIC_OFF 0
#define NGX_HTTP_GZIP_STATIC_ON 1
#define NGX_HTTP_GZIP_STATIC_ALWAYS 2
typedef struct {
ngx_uint_t enable;
} ngx_http_gzip_static_conf_t;
static ngx_int_t ngx_http_gzip_static_handler(ngx_http_request_t *r);
static void *ngx_http_gzip_static_create_conf(ngx_conf_t *cf);
static char *ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent,
void *child);
static ngx_int_t ngx_http_gzip_static_init(ngx_conf_t *cf);
static ngx_conf_enum_t ngx_http_gzip_static[] = {
{ ngx_string("off"), NGX_HTTP_GZIP_STATIC_OFF },
{ ngx_string("on"), NGX_HTTP_GZIP_STATIC_ON },
{ ngx_string("always"), NGX_HTTP_GZIP_STATIC_ALWAYS },
{ ngx_null_string, 0 }
};
static ngx_command_t ngx_http_gzip_static_commands[] = {
{ ngx_string("gzip_static"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_gzip_static_conf_t, enable),
&ngx_http_gzip_static },
ngx_null_command
};
static ngx_http_module_t ngx_http_gzip_static_module_ctx = {
NULL, /* preconfiguration */
ngx_http_gzip_static_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_gzip_static_create_conf, /* create location configuration */
ngx_http_gzip_static_merge_conf /* merge location configuration */
};
ngx_module_t ngx_http_gzip_static_module = {
NGX_MODULE_V1,
&ngx_http_gzip_static_module_ctx, /* module context */
ngx_http_gzip_static_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
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_HTTP_INTERNAL_SERVER_ERROR;
}
h->hash = 1;
h->next = NULL;
ngx_str_set(&h->key, "Content-Encoding");
ngx_str_set(&h->value, "gzip");
r->headers_out.content_encoding = h;
r->allow_ranges = 1;
/* we need to allocate all before the header would be sent */
b = ngx_calloc_buf(r->pool);
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->sync = (b->last_buf || b->in_file) ? 0 : 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 void *
ngx_http_gzip_static_create_conf(ngx_conf_t *cf)
{
ngx_http_gzip_static_conf_t *conf;
conf = ngx_palloc(cf->pool, sizeof(ngx_http_gzip_static_conf_t));
if (conf == NULL) {
return NULL;
}
conf->enable = NGX_CONF_UNSET_UINT;
return conf;
}
static char *
ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_gzip_static_conf_t *prev = parent;
ngx_http_gzip_static_conf_t *conf = child;
ngx_conf_merge_uint_value(conf->enable, prev->enable,
NGX_HTTP_GZIP_STATIC_OFF);
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_gzip_static_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_gzip_static_handler;
return NGX_OK;
}
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