Mercurial > hg > nginx
annotate src/http/ngx_http_write_filter.c @ 24:77c7629a2627
nginx-0.0.1-2002-12-10-21:05:12 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 10 Dec 2002 18:05:12 +0000 |
parents | 4f3879d9b6f6 |
children | 53cb81681040 |
rev | line source |
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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_hunk.h> |
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5 #include <ngx_event_write.h> |
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6 #include <ngx_http.h> |
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7 #include <ngx_http_config.h> |
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8 #include <ngx_http_output_filter.h> |
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9 #include <ngx_http_write_filter.h> |
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12 static ngx_command_t ngx_http_write_filter_commands[]; |
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13 |
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14 static void *ngx_http_write_filter_create_conf(ngx_pool_t *pool); |
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15 |
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16 ngx_http_module_t ngx_http_write_filter_module = { |
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17 NGX_HTTP_MODULE, |
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18 |
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19 NULL, /* create server config */ |
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20 ngx_http_write_filter_create_conf, /* create location config */ |
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21 ngx_http_write_filter_commands, /* module directives */ |
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22 |
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23 NULL, /* init module */ |
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24 NULL, /* translate handler */ |
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25 |
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26 NULL /* init output body filter */ |
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27 }; |
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28 |
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29 |
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30 static ngx_command_t ngx_http_write_filter_commands[] = { |
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31 |
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32 {"write_buffer", ngx_conf_set_size_slot, |
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33 offsetof(ngx_http_write_filter_conf_t, buffer_output), |
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34 NGX_HTTP_LOC_CONF, NGX_CONF_TAKE1, |
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35 "set write filter size to buffer output"}, |
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36 |
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37 {NULL} |
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38 |
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39 }; |
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40 |
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41 |
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42 int ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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43 { |
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44 int last; |
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45 off_t size, flush; |
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46 ngx_chain_t *ch, **prev, *chain; |
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47 ngx_http_write_filter_ctx_t *ctx; |
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48 ngx_http_write_filter_conf_t *conf; |
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49 |
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50 |
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51 ctx = (ngx_http_write_filter_ctx_t *) |
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52 ngx_get_module_ctx(r->main ? r->main : r, |
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53 ngx_http_write_filter_module); |
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54 if (ctx == NULL) |
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55 ngx_http_create_ctx(r, ctx, |
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56 ngx_http_write_filter_module, |
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57 sizeof(ngx_http_write_filter_ctx_t)); |
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58 |
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59 size = flush = 0; |
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60 last = 0; |
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61 prev = &ctx->out; |
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62 |
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63 /* find size, flush point and last link of saved chain */ |
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64 for (ch = ctx->out; ch; ch = ch->next) { |
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65 prev = &ch->next; |
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66 size += ch->hunk->last.file - ch->hunk->pos.file; |
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67 |
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68 ngx_log_debug(r->connection->log, "old chunk: %x " QX_FMT " " QD_FMT _ |
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69 ch->hunk->type _ ch->hunk->pos.file _ |
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70 ch->hunk->last.file - ch->hunk->pos.file); |
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71 |
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72 if (ch->hunk->type & NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED) |
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73 flush = size; |
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74 |
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75 if (ch->hunk->type & NGX_HUNK_LAST) |
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76 last = 1; |
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77 } |
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78 |
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79 /* add new chain to existent one */ |
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80 for (/* void */; in; in = in->next) { |
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81 ngx_test_null(ch, ngx_palloc(r->pool, sizeof(ngx_chain_t)), NGX_ERROR); |
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82 |
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83 ch->hunk = in->hunk; |
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84 ch->next = NULL; |
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85 *prev = ch; |
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86 prev = &ch->next; |
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87 size += ch->hunk->last.file - ch->hunk->pos.file; |
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88 |
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89 ngx_log_debug(r->connection->log, "new chunk: %x " QX_FMT " " QD_FMT _ |
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90 ch->hunk->type _ ch->hunk->pos.file _ |
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91 ch->hunk->last.file - ch->hunk->pos.file); |
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92 |
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93 if (ch->hunk->type & NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED) |
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94 flush = size; |
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95 |
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96 if (ch->hunk->type & NGX_HUNK_LAST) |
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97 last = 1; |
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98 } |
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99 |
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100 conf = (ngx_http_write_filter_conf_t *) |
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101 ngx_get_module_loc_conf(r->main ? r->main : r, |
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102 ngx_http_write_filter_module); |
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103 |
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104 if (!last && flush == 0 && size < conf->buffer_output) |
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105 return NGX_OK; |
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106 |
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107 chain = ngx_event_write(r->connection, ctx->out, flush); |
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108 if (chain == (ngx_chain_t *) -1) |
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109 return NGX_ERROR; |
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110 |
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111 ctx->out = chain; |
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112 |
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113 ngx_log_debug(r->connection->log, "write filter %x" _ chain); |
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114 |
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115 return (chain ? NGX_AGAIN : NGX_OK); |
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116 } |
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117 |
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118 |
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119 static void *ngx_http_write_filter_create_conf(ngx_pool_t *pool) |
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120 { |
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121 ngx_http_write_filter_conf_t *conf; |
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122 |
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123 ngx_test_null(conf, |
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124 ngx_palloc(pool, sizeof(ngx_http_write_filter_conf_t)), |
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125 NULL); |
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126 |
10
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127 conf->buffer_output = NGX_CONF_UNSET; |
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128 |
10
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129 return conf; |
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130 } |