Mercurial > hg > nginx-vendor-1-0
view src/http/modules/ngx_http_not_modified_filter_module.c @ 638:692f4d4d7f10 NGINX_1_0_9
nginx 1.0.9
*) Change: now the 0x7F-0x1F characters are escaped as \xXX in an
access_log.
*) Change: now SIGWINCH signal works only in daemon mode.
*) Feature: "proxy/fastcgi/scgi/uwsgi_ignore_headers" directives support
the following additional values: X-Accel-Limit-Rate,
X-Accel-Buffering, X-Accel-Charset.
*) Feature: decrease of memory consumption if SSL is used.
*) Feature: accept filters are now supported on NetBSD.
*) Feature: the "uwsgi_buffering" and "scgi_buffering" directives.
Thanks to Peter Smit.
*) Bugfix: a segmentation fault occurred on start or while
reconfiguration if the "ssl" directive was used at http level and
there was no "ssl_certificate" defined.
*) Bugfix: some UTF-8 characters were processed incorrectly.
Thanks to Alexey Kuts.
*) Bugfix: the ngx_http_rewrite_module directives specified at "server"
level were executed twice if no matching locations were defined.
*) Bugfix: a socket leak might occurred if "aio sendfile" was used.
*) Bugfix: connections with fast clients might be closed after
send_timeout if file AIO was used.
*) Bugfix: in the ngx_http_autoindex_module.
*) Bugfix: the module ngx_http_mp4_module did not support seeking on
32-bit platforms.
*) Bugfix: non-cacheable responses might be cached if
"proxy_cache_bypass" directive was used.
Thanks to John Ferlito.
*) Bugfix: cached responses with an empty body were returned
incorrectly; the bug had appeared in 0.8.31.
*) Bugfix: 201 responses of the ngx_http_dav_module were incorrect; the
bug had appeared in 0.8.32.
*) Bugfix: in the "return" directive.
*) Bugfix: the "ssl_verify_client", "ssl_verify_depth", and
"ssl_prefer_server_ciphers" directives might work incorrectly if SNI
was used.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Tue, 01 Nov 2011 00:00:00 +0400 |
parents | ce857f6b74a7 |
children | ad25218fd14b |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r); static ngx_int_t ngx_http_test_not_modified(ngx_http_request_t *r); static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { NULL, /* preconfiguration */ ngx_http_not_modified_filter_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ NULL, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_not_modified_filter_module = { NGX_MODULE_V1, &ngx_http_not_modified_filter_module_ctx, /* module context */ NULL, /* 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_http_output_header_filter_pt ngx_http_next_header_filter; static ngx_int_t ngx_http_not_modified_header_filter(ngx_http_request_t *r) { if (r->headers_out.status != NGX_HTTP_OK || r != r->main || r->headers_out.last_modified_time == -1) { return ngx_http_next_header_filter(r); } if (r->headers_in.if_unmodified_since) { return ngx_http_test_precondition(r); } if (r->headers_in.if_modified_since) { return ngx_http_test_not_modified(r); } return ngx_http_next_header_filter(r); } static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r) { time_t iums; iums = ngx_http_parse_time(r->headers_in.if_unmodified_since->value.data, r->headers_in.if_unmodified_since->value.len); ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http iums:%d lm:%d", iums, r->headers_out.last_modified_time); if (iums >= r->headers_out.last_modified_time) { return ngx_http_next_header_filter(r); } return ngx_http_filter_finalize_request(r, NULL, NGX_HTTP_PRECONDITION_FAILED); } static ngx_int_t ngx_http_test_not_modified(ngx_http_request_t *r) { time_t ims; ngx_http_core_loc_conf_t *clcf; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) { return ngx_http_next_header_filter(r); } ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, r->headers_in.if_modified_since->value.len); ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http ims:%d lm:%d", ims, r->headers_out.last_modified_time); if (ims != r->headers_out.last_modified_time) { if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT || ims < r->headers_out.last_modified_time) { return ngx_http_next_header_filter(r); } } r->headers_out.status = NGX_HTTP_NOT_MODIFIED; r->headers_out.status_line.len = 0; r->headers_out.content_type.len = 0; ngx_http_clear_content_length(r); ngx_http_clear_accept_ranges(r); if (r->headers_out.content_encoding) { r->headers_out.content_encoding->hash = 0; r->headers_out.content_encoding = NULL; } return ngx_http_next_header_filter(r); } static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf) { ngx_http_next_header_filter = ngx_http_top_header_filter; ngx_http_top_header_filter = ngx_http_not_modified_header_filter; return NGX_OK; }