Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 612:182bfe05e2c3
release-0.3.27 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 08 Feb 2006 15:33:12 +0000 |
parents | 9262f520ce21 |
children | 7e24168b0853 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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10 |
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11 |
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13 static ngx_int_t ngx_http_not_modified_filter_init(ngx_cycle_t *cycle); |
135
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14 |
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15 |
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16 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { |
509 | 17 NULL, /* preconfiguration */ |
18 NULL, /* postconfiguration */ | |
177
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19 |
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20 NULL, /* create main configuration */ |
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21 NULL, /* init main configuration */ |
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22 |
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23 NULL, /* create server configuration */ |
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24 NULL, /* merge server configuration */ |
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25 |
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26 NULL, /* create location configuration */ |
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27 NULL /* merge location configuration */ |
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28 }; |
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29 |
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30 |
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31 ngx_module_t ngx_http_not_modified_filter_module = { |
509 | 32 NGX_MODULE_V1, |
135
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33 &ngx_http_not_modified_filter_module_ctx, /* module context */ |
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34 NULL, /* module directives */ |
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35 NGX_HTTP_MODULE, /* module type */ |
541 | 36 NULL, /* init master */ |
135
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37 ngx_http_not_modified_filter_init, /* init module */ |
541 | 38 NULL, /* init process */ |
39 NULL, /* init thread */ | |
40 NULL, /* exit thread */ | |
41 NULL, /* exit process */ | |
42 NULL, /* exit master */ | |
43 NGX_MODULE_V1_PADDING | |
135
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44 }; |
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45 |
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46 |
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47 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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48 |
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49 |
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50 static ngx_int_t ngx_http_not_modified_header_filter(ngx_http_request_t *r) |
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51 { |
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52 time_t ims; |
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53 |
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54 if (r->headers_out.status != NGX_HTTP_OK |
597 | 55 || r != r->main |
135
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56 || r->headers_in.if_modified_since == NULL |
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57 || r->headers_out.last_modified_time == -1) |
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58 { |
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59 return ngx_http_next_header_filter(r); |
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60 } |
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61 |
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62 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, |
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63 r->headers_in.if_modified_since->value.len); |
577 | 64 |
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65 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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66 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time); |
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67 |
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68 /* |
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69 * I think that the equality of the dates is correcter |
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70 */ |
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71 |
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72 if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) { |
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73 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
509 | 74 r->headers_out.content_type.len = 0; |
577 | 75 ngx_http_clear_content_length(r); |
76 ngx_http_clear_accept_ranges(r); | |
135
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77 } |
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78 |
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79 return ngx_http_next_header_filter(r); |
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80 } |
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81 |
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82 |
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83 static ngx_int_t ngx_http_not_modified_filter_init(ngx_cycle_t *cycle) |
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84 { |
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85 ngx_http_next_header_filter = ngx_http_top_header_filter; |
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86 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
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87 |
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88 return NGX_OK; |
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89 } |