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annotate src/http/modules/ngx_http_not_modified_filter.c @ 195:8dee38ea9117

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nginx-0.0.1-2003-11-25-23:44:56 import
author Igor Sysoev <igor@sysoev.ru>
date Tue, 25 Nov 2003 20:44:56 +0000
parents 4db54fdbcbe7
children 70e1c7d2b83d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
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1
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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2 #include <ngx_config.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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3 #include <ngx_core.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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4 #include <ngx_http.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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8 static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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11 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = {
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4db54fdbcbe7 nginx-0.0.1-2003-11-10-20:17:31 import
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12 NULL, /* pre conf */
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13
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14 NULL, /* create main configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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15 NULL, /* init main configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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16
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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17 NULL, /* create server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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18 NULL, /* merge server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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20 NULL, /* create location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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21 NULL /* merge location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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22 };
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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25 ngx_module_t ngx_http_not_modified_filter_module = {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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26 NGX_MODULE,
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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27 &ngx_http_not_modified_filter_module_ctx, /* module context */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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28 NULL, /* module directives */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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29 NGX_HTTP_MODULE, /* module type */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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30 ngx_http_not_modified_filter_init, /* init module */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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31 NULL /* init child */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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32 };
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35 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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38 static int ngx_http_not_modified_header_filter(ngx_http_request_t *r)
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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39 {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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40 time_t ims;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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42 if (r->headers_out.status != NGX_HTTP_OK
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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43 || r->headers_in.if_modified_since == NULL
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cb77c084acdb nginx-0.0.1-2003-10-09-11:00:45 import
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44 || r->headers_out.last_modified_time == -1)
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45 {
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46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
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46 return ngx_http_next_header_filter(r);
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47 }
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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48
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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49 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data,
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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50 r->headers_in.if_modified_since->value.len);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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51
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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52 ngx_log_debug(r->connection->log, "%d %d" _
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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53 ims _ r->headers_out.last_modified_time);
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54
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46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
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55 /*
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
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56 * I think that the equality of the dates is correcter
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57 */
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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59 if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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60 r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
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8dee38ea9117 nginx-0.0.1-2003-11-25-23:44:56 import
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61 r->headers_out.content_type->key.len = 0;
8dee38ea9117 nginx-0.0.1-2003-11-25-23:44:56 import
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62 r->headers_out.content_type = NULL;
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c71aeb75c071 nginx-0.0.1-2003-10-21-20:49:56 import
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63 r->headers_out.content_length_n = -1;
c71aeb75c071 nginx-0.0.1-2003-10-21-20:49:56 import
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64 r->headers_out.content_length = NULL;
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8dee38ea9117 nginx-0.0.1-2003-11-25-23:44:56 import
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65 #if 0
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da00cde00e8a nginx-0.0.1-2003-10-02-09:39:37 import
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66 r->headers_out.accept_ranges->key.len = 0;
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67 #endif
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68 }
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70 return ngx_http_next_header_filter(r);
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71 }
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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74 static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle)
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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75 {
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76 ngx_http_next_header_filter = ngx_http_top_header_filter;
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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77 ngx_http_top_header_filter = ngx_http_not_modified_header_filter;
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78
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79 return NGX_OK;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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80 }