Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_not_modified_filter.c @ 135:e29909bd9b8a
nginx-0.0.1-2003-09-28-23:29:06 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sun, 28 Sep 2003 19:29:06 +0000 |
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children | da00cde00e8a |
rev | line source |
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135
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nginx-0.0.1-2003-09-28-23:29:06 import
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_http.h> |
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5 |
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6 |
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7 |
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8 static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle); |
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9 |
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10 |
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11 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { |
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12 NULL, /* create main configuration */ |
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13 NULL, /* init main configuration */ |
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14 |
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15 NULL, /* create server configuration */ |
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16 NULL, /* merge server configuration */ |
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17 |
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18 NULL, /* create location configuration */ |
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19 NULL /* merge location configuration */ |
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20 }; |
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21 |
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22 |
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23 ngx_module_t ngx_http_not_modified_filter_module = { |
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24 NGX_MODULE, |
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25 &ngx_http_not_modified_filter_module_ctx, /* module context */ |
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26 NULL, /* module directives */ |
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27 NGX_HTTP_MODULE, /* module type */ |
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28 ngx_http_not_modified_filter_init, /* init module */ |
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29 NULL /* init child */ |
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30 }; |
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31 |
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32 |
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33 static int (*next_header_filter) (ngx_http_request_t *r); |
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34 |
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35 |
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36 static int ngx_http_not_modified_header_filter(ngx_http_request_t *r) |
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37 { |
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38 time_t ims; |
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39 |
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40 if (r->headers_out.status != NGX_HTTP_OK |
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41 || r->headers_in.if_modified_since == NULL |
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42 || r->headers_out.last_modified_time == NULL) |
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43 { |
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44 return next_header_filter(r); |
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45 } |
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46 |
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47 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, |
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48 r->headers_in.if_modified_since->value.len); |
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49 |
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50 ngx_log_debug(r->connection->log, "%d %d" _ |
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51 ims _ r->headers_out.last_modified_time); |
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52 |
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53 /* I think that the date equality is correcter */ |
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54 |
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55 if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) { |
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56 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
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57 r->headers_out.content_length = -1; |
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58 r->headers_out.content_type->key.len = 0; |
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59 r->headers_out.content_type = NULL; |
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60 |
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61 /* TODO: delete "Accept-Ranges" header |
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62 } |
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63 |
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64 return next_header_filter(r); |
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65 } |
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66 |
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67 |
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68 static int ngx_http_not_modified_filter_init(ngx_cycle_t *cycle) |
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69 { |
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70 next_header_filter = ngx_http_top_header_filter; |
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71 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
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72 |
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73 return NGX_OK; |
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74 } |