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src/http/modules/ngx_http_gzip_static_module.c - nginx-1.7.10

Global variables defined

Data types defined

Functions defined

Macros defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #include <ngx_config.h>
  9. #include <ngx_core.h>
  10. #include <ngx_http.h>


  13. ‌#define NGX_HTTP_GZIP_STATIC_OFF     0
  14. ‌#define NGX_HTTP_GZIP_STATIC_ON      1
  15. ‌#define NGX_HTTP_GZIP_STATIC_ALWAYS  2


  18. typedef struct {
  19.     ngx_uint_t  enable;
  20. ‌} ngx_http_gzip_static_conf_t;


  23. static ngx_int_t ngx_http_gzip_static_handler(ngx_http_request_t *r);
  24. static void *ngx_http_gzip_static_create_conf(ngx_conf_t *cf);
  25. static char *ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent,
  26.     void *child);
  27. static ngx_int_t ngx_http_gzip_static_init(ngx_conf_t *cf);


  30. ‌static ngx_conf_enum_t  ngx_http_gzip_static[] = {
  31.     { ngx_string("off"), NGX_HTTP_GZIP_STATIC_OFF },
  32.     { ngx_string("on"), NGX_HTTP_GZIP_STATIC_ON },
  33.     { ngx_string("always"), NGX_HTTP_GZIP_STATIC_ALWAYS },
  34.     { ngx_null_string, 0 }
  35. };


  38. ‌static ngx_command_t  ngx_http_gzip_static_commands[] = {

  40.     { ngx_string("gzip_static"),
  41.       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
  42.       ngx_conf_set_enum_slot,
  43.       NGX_HTTP_LOC_CONF_OFFSET,
  44.       offsetof(ngx_http_gzip_static_conf_t, enable),
  45.       &ngx_http_gzip_static },

  47.       ngx_null_command
  48. };


  51. ‌ngx_http_module_t  ngx_http_gzip_static_module_ctx = {
  52.     NULL,                                  /* preconfiguration */
  53.     ngx_http_gzip_static_init,             /* postconfiguration */

  55.     NULL,                                  /* create main configuration */
  56.     NULL,                                  /* init main configuration */

  58.     NULL,                                  /* create server configuration */
  59.     NULL,                                  /* merge server configuration */

  61.     ngx_http_gzip_static_create_conf,      /* create location configuration */
  62.     ngx_http_gzip_static_merge_conf        /* merge location configuration */
  63. };


  66. ‌ngx_module_t  ngx_http_gzip_static_module = {
  67.     NGX_MODULE_V1,
  68.     &ngx_http_gzip_static_module_ctx,      /* module context */
  69.     ngx_http_gzip_static_commands,         /* module directives */
  70.     NGX_HTTP_MODULE,                       /* module type */
  71.     NULL,                                  /* init master */
  72.     NULL,                                  /* init module */
  73.     NULL,                                  /* init process */
  74.     NULL,                                  /* init thread */
  75.     NULL,                                  /* exit thread */
  76.     NULL,                                  /* exit process */
  77.     NULL,                                  /* exit master */
  78.     NGX_MODULE_V1_PADDING
  79. };


  82. static ngx_int_t
  83. ‌ngx_http_gzip_static_handler(ngx_http_request_t *r)
  84. {
  85.     u_char                       *p;
  86.     size_t                        root;
  87.     ngx_str_t                     path;
  88.     ngx_int_t                     rc;
  89.     ngx_uint_t                    level;
  90.     ngx_log_t                    *log;
  91.     ngx_buf_t                    *b;
  92.     ngx_chain_t                   out;
  93.     ngx_table_elt_t              *h;
  94.     ngx_open_file_info_t          of;
  95.     ngx_http_core_loc_conf_t     *clcf;
  96.     ngx_http_gzip_static_conf_t  *gzcf;

  98.     if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
  99.         return NGX_DECLINED;
  100.     }

  102.     if (r->uri.data[r->uri.len - 1] == '/') {
  103.         return NGX_DECLINED;
  104.     }

  106.     gzcf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_static_module);

  108.     if (gzcf->enable == NGX_HTTP_GZIP_STATIC_OFF) {
  109.         return NGX_DECLINED;
  110.     }

  112.     if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
  113.         rc = ngx_http_gzip_ok(r);

  115.     } else {
  116.         /* always */
  117.         rc = NGX_OK;
  118.     }

  120.     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

  122.     if (!clcf->gzip_vary && rc != NGX_OK) {
  123.         return NGX_DECLINED;
  124.     }

  126.     log = r->connection->log;

  128.     p = ngx_http_map_uri_to_path(r, &path, &root, sizeof(".gz") - 1);
  129.     if (p == NULL) {
  130.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  131.     }

  133.     *p++ = '.';
  134.     *p++ = 'g';
  135.     *p++ = 'z';
  136.     *p = '\0';

  138.     path.len = p - path.data;

  140.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
  141.                    "http filename: \"%s\"", path.data);

  143.     ngx_memzero(&of, sizeof(ngx_open_file_info_t));

  145.     of.read_ahead = clcf->read_ahead;
  146.     of.directio = clcf->directio;
  147.     of.valid = clcf->open_file_cache_valid;
  148.     of.min_uses = clcf->open_file_cache_min_uses;
  149.     of.errors = clcf->open_file_cache_errors;
  150.     of.events = clcf->open_file_cache_events;

  152.     if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
  153.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  154.     }

  156.     if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
  157.         != NGX_OK)
  158.     {
  159.         switch (of.err) {

  161.         case 0:
  162.             return NGX_HTTP_INTERNAL_SERVER_ERROR;

  164.         case NGX_ENOENT:
  165.         case NGX_ENOTDIR:
  166.         case NGX_ENAMETOOLONG:

  168.             return NGX_DECLINED;

  170.         case NGX_EACCES:
  171. #if (NGX_HAVE_OPENAT)
  172.         case NGX_EMLINK:
  173.         case NGX_ELOOP:
  174. #endif

  176.             level = NGX_LOG_ERR;
  177.             break;

  179.         default:

  181.             level = NGX_LOG_CRIT;
  182.             break;
  183.         }

  185.         ngx_log_error(level, log, of.err,
  186.                       "%s \"%s\" failed", of.failed, path.data);

  188.         return NGX_DECLINED;
  189.     }

  191.     if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
  192.         r->gzip_vary = 1;

  194.         if (rc != NGX_OK) {
  195.             return NGX_DECLINED;
  196.         }
  197.     }

  199.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd);

  201.     if (of.is_dir) {
  202.         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
  203.         return NGX_DECLINED;
  204.     }

  206. #if !(NGX_WIN32) /* the not regular files are probably Unix specific */

  208.     if (!of.is_file) {
  209.         ngx_log_error(NGX_LOG_CRIT, log, 0,
  210.                       "\"%s\" is not a regular file", path.data);

  212.         return NGX_HTTP_NOT_FOUND;
  213.     }

  215. #endif

  217.     r->root_tested = !r->error_page;

  219.     rc = ngx_http_discard_request_body(r);

  221.     if (rc != NGX_OK) {
  222.         return rc;
  223.     }

  225.     log->action = "sending response to client";

  227.     r->headers_out.status = NGX_HTTP_OK;
  228.     r->headers_out.content_length_n = of.size;
  229.     r->headers_out.last_modified_time = of.mtime;

  231.     if (ngx_http_set_etag(r) != NGX_OK) {
  232.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  233.     }

  235.     if (ngx_http_set_content_type(r) != NGX_OK) {
  236.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  237.     }

  239.     h = ngx_list_push(&r->headers_out.headers);
  240.     if (h == NULL) {
  241.         return NGX_ERROR;
  242.     }

  244.     h->hash = 1;
  245.     ngx_str_set(&h->key, "Content-Encoding");
  246.     ngx_str_set(&h->value, "gzip");
  247.     r->headers_out.content_encoding = h;

  249.     /* we need to allocate all before the header would be sent */

  251.     b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
  252.     if (b == NULL) {
  253.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  254.     }

  256.     b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
  257.     if (b->file == NULL) {
  258.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  259.     }

  261.     rc = ngx_http_send_header(r);

  263.     if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
  264.         return rc;
  265.     }

  267.     b->file_pos = 0;
  268.     b->file_last = of.size;

  270.     b->in_file = b->file_last ? 1 : 0;
  271.     b->last_buf = (r == r->main) ? 1 : 0;
  272.     b->last_in_chain = 1;

  274.     b->file->fd = of.fd;
  275.     b->file->name = path;
  276.     b->file->log = log;
  277.     b->file->directio = of.is_directio;

  279.     out.buf = b;
  280.     out.next = NULL;

  282.     return ngx_http_output_filter(r, &out);
  283. }


  286. static void *
  287. ‌ngx_http_gzip_static_create_conf(ngx_conf_t *cf)
  288. {
  289.     ngx_http_gzip_static_conf_t  *conf;

  291.     conf = ngx_palloc(cf->pool, sizeof(ngx_http_gzip_static_conf_t));
  292.     if (conf == NULL) {
  293.         return NULL;
  294.     }

  296.     conf->enable = NGX_CONF_UNSET_UINT;

  298.     return conf;
  299. }


  302. static char *
  303. ‌ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent, void *child)
  304. {
  305.     ngx_http_gzip_static_conf_t *prev = parent;
  306.     ngx_http_gzip_static_conf_t *conf = child;

  308.     ngx_conf_merge_uint_value(conf->enable, prev->enable,
  309.                               NGX_HTTP_GZIP_STATIC_OFF);

  311.     return NGX_CONF_OK;
  312. }


  315. static ngx_int_t
  316. ‌ngx_http_gzip_static_init(ngx_conf_t *cf)
  317. {
  318.     ngx_http_handler_pt        *h;
  319.     ngx_http_core_main_conf_t  *cmcf;

  321.     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);

  323.     h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
  324.     if (h == NULL) {
  325.         return NGX_ERROR;
  326.     }

  328.     *h = ngx_http_gzip_static_handler;

  330.     return NGX_OK;
  331. }

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