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view src/http/modules/ngx_http_not_modified_filter.c @ 312:f5431a4bbc7d
nginx-0.0.3-2004-04-13-09:27:03 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 13 Apr 2004 05:27:03 +0000 |
parents | 70e1c7d2b83d |
children | 2e3cbc1bbe3c |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle); static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { NULL, /* pre conf */ 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, &ngx_http_not_modified_filter_module_ctx, /* module context */ NULL, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_not_modified_filter_init, /* init module */ NULL /* init child */ }; static ngx_http_output_header_filter_pt ngx_http_next_header_filter; static int ngx_http_not_modified_header_filter(ngx_http_request_t *r) { time_t ims; if (r->headers_out.status != NGX_HTTP_OK || r->headers_in.if_modified_since == NULL || r->headers_out.last_modified_time == -1) { 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); /* * I think that the equality of the dates is correcter */ if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) { r->headers_out.status = NGX_HTTP_NOT_MODIFIED; r->headers_out.content_type->key.len = 0; r->headers_out.content_type = NULL; r->headers_out.content_length_n = -1; r->headers_out.content_length = NULL; #if 0 r->headers_out.accept_ranges->key.len = 0; #endif } return ngx_http_next_header_filter(r); } static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle) { ngx_http_next_header_filter = ngx_http_top_header_filter; ngx_http_top_header_filter = ngx_http_not_modified_header_filter; return NGX_OK; }