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annotate src/http/modules/ngx_http_not_modified_filter.c @ 142:cb77c084acdb

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nginx-0.0.1-2003-10-09-11:00:45 import
author Igor Sysoev <igor@sysoev.ru>
date Thu, 09 Oct 2003 07:00:45 +0000
parents da00cde00e8a
children c71aeb75c071
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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9
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 = {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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12 NULL, /* create main configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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13 NULL, /* init main configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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14
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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15 NULL, /* create server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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16 NULL, /* merge server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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17
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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18 NULL, /* create location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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19 NULL /* merge location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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20 };
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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23 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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24 NGX_MODULE,
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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25 &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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26 NULL, /* module directives */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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27 NGX_HTTP_MODULE, /* module type */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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28 ngx_http_not_modified_filter_init, /* init module */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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29 NULL /* init child */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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30 };
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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33 static int (*next_header_filter) (ngx_http_request_t *r);
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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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36 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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37 {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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38 time_t ims;
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 if (r->headers_out.status != NGX_HTTP_OK
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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41 || 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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42 || r->headers_out.last_modified_time == -1)
135
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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43 {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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44 return next_header_filter(r);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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45 }
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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46
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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47 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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48 r->headers_in.if_modified_since->value.len);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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49
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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50 ngx_log_debug(r->connection->log, "%d %d" _
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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51 ims _ r->headers_out.last_modified_time);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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52
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cb77c084acdb nginx-0.0.1-2003-10-09-11:00:45 import
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53 /* I think that the equality of the dates is correcter */
135
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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55 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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56 r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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57 r->headers_out.content_length = -1;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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58 r->headers_out.content_type->key.len = 0;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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59 r->headers_out.content_type = NULL;
136
da00cde00e8a nginx-0.0.1-2003-10-02-09:39:37 import
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60 r->headers_out.accept_ranges->key.len = 0;
135
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61 }
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62
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63 return next_header_filter(r);
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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64 }
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67 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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68 {
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69 next_header_filter = ngx_http_top_header_filter;
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70 ngx_http_top_header_filter = ngx_http_not_modified_header_filter;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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71
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72 return NGX_OK;
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73 }