Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 1176:302635fc9a87
release-0.5.18 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 19 Apr 2007 18:16:54 +0000 |
parents | 7e24168b0853 |
children | b67b75bb09b7 |
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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12 |
681 | 13 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); |
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 */ |
681 | 18 ngx_http_not_modified_filter_init, /* postconfiguration */ |
177
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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 */ |
681 | 37 NULL, /* 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; |
135
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48 |
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49 |
681 | 50 static |
51 ngx_int_t ngx_http_not_modified_header_filter(ngx_http_request_t *r) | |
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52 { |
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53 time_t ims; |
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54 |
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55 if (r->headers_out.status != NGX_HTTP_OK |
597 | 56 || r != r->main |
135
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57 || r->headers_in.if_modified_since == NULL |
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58 || r->headers_out.last_modified_time == -1) |
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59 { |
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60 return ngx_http_next_header_filter(r); |
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61 } |
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62 |
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63 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, |
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64 r->headers_in.if_modified_since->value.len); |
577 | 65 |
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66 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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67 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time); |
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68 |
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69 /* |
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70 * I think that the equality of the dates is correcter |
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71 */ |
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72 |
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73 if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) { |
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74 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
509 | 75 r->headers_out.content_type.len = 0; |
577 | 76 ngx_http_clear_content_length(r); |
77 ngx_http_clear_accept_ranges(r); | |
135
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78 } |
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79 |
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80 return ngx_http_next_header_filter(r); |
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81 } |
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82 |
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83 |
681 | 84 static |
85 ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf) | |
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86 { |
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87 ngx_http_next_header_filter = ngx_http_top_header_filter; |
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88 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
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89 |
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90 return NGX_OK; |
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91 } |