Mercurial > hg > nginx
view src/http/modules/ngx_http_gzip_static_module.c @ 6749:f88a145b093e stable-1.10
HTTP/2: the "421 Misdirected Request" response (closes #848).
Since 4fbef397c753 nginx rejects with the 400 error any attempts of
requesting different host over the same connection, if the relevant
virtual server requires verification of a client certificate.
While requesting hosts other than negotiated isn't something legal
in HTTP/1.x, the HTTP/2 specification explicitly permits such requests
for connection reuse and has introduced a special response code 421.
According to RFC 7540 Section 9.1.2 this code can be sent by a server
that is not configured to produce responses for the combination of
scheme and authority that are included in the request URI. And the
client may retry the request over a different connection.
Now this code is used for requests that aren't authorized in current
connection. After receiving the 421 response a client will be able
to open a new connection, provide the required certificate and retry
the request.
Unfortunately, not all clients currently are able to handle it well.
Notably Chrome just shows an error, while at least the latest version
of Firefox retries the request over a new connection.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 20 May 2016 18:41:17 +0300 |
parents | fcb0420f90de |
children | a72886067bbb |
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/* * 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 }; 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_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 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; }