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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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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 typedef struct {
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13 ngx_bufs_t bufs;
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14 } ngx_http_copy_filter_conf_t;
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15
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16
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17 static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf);
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18 static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf,
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19 void *parent, void *child);
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20 static ngx_int_t ngx_http_copy_filter_init(ngx_cycle_t *cycle);
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21
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22
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23 static ngx_command_t ngx_http_copy_filter_commands[] = {
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24
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25 { ngx_string("output_buffers"),
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26 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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27 ngx_conf_set_bufs_slot,
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28 NGX_HTTP_LOC_CONF_OFFSET,
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29 offsetof(ngx_http_copy_filter_conf_t, bufs),
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30 NULL },
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31
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32 ngx_null_command
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33 };
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34
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35
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36 static ngx_http_module_t ngx_http_copy_filter_module_ctx = {
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37 NULL, /* preconfiguration */
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38 NULL, /* postconfiguration */
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39
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40 NULL, /* create main configuration */
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41 NULL, /* init main configuration */
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42
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43 NULL, /* create server configuration */
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44 NULL, /* merge server configuration */
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45
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46 ngx_http_copy_filter_create_conf, /* create location configuration */
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47 ngx_http_copy_filter_merge_conf /* merge location configuration */
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48 };
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49
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50
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51 ngx_module_t ngx_http_copy_filter_module = {
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52 NGX_MODULE_V1,
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53 &ngx_http_copy_filter_module_ctx, /* module context */
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54 ngx_http_copy_filter_commands, /* module directives */
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55 NGX_HTTP_MODULE, /* module type */
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56 ngx_http_copy_filter_init, /* init module */
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57 NULL /* init process */
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58 };
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59
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60
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61 static ngx_http_output_body_filter_pt ngx_http_next_filter;
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62
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63
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64 static ngx_int_t
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65 ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in)
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66 {
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67 ngx_int_t rc;
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68 ngx_output_chain_ctx_t *ctx;
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69 ngx_http_copy_filter_conf_t *conf;
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70
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71 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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72 "copy filter: \"%V\"", &r->uri);
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73
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76
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74 if (r->connection->closed) {
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75 rc = ngx_http_next_filter(r, in);
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76
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77 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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78 "copy closed filter: %i \"%V\"", rc, &r->uri);
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79 return rc;
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80 }
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81
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82 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module);
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83
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84 if (ctx == NULL) {
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85 conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module);
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86
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87 ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t));
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88 if (ctx == NULL) {
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89 return NGX_ERROR;
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90 }
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91
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92 ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module);
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93
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94 ctx->sendfile = r->connection->sendfile;
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95 ctx->need_in_memory = r->main_filter_need_in_memory
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96 || r->filter_need_in_memory;
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97 ctx->need_in_temp = r->filter_need_temporary;
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98
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99 ctx->pool = r->pool;
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100 ctx->bufs = conf->bufs;
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101 ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module;
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102
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103 ctx->output_filter = (ngx_output_chain_filter_pt) ngx_http_next_filter;
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104 ctx->filter_ctx = r;
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105
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106 }
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107
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108 rc = ngx_output_chain(ctx, in);
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109
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110 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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111 "copy filter: %i \"%V\"", rc, &r->uri);
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112
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113 return rc;
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114 }
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115
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116
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117 static void *
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118 ngx_http_copy_filter_create_conf(ngx_conf_t *cf)
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119 {
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120 ngx_http_copy_filter_conf_t *conf;
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121
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122 conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t));
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123 if (conf == NULL) {
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124 return NULL;
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125 }
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126
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127 conf->bufs.num = 0;
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128
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129 return conf;
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130 }
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131
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132
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133 static char *
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134 ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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135 {
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136 ngx_http_copy_filter_conf_t *prev = parent;
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137 ngx_http_copy_filter_conf_t *conf = child;
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138
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139 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 1, 32768);
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140
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141 return NULL;
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142 }
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143
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144
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145 static ngx_int_t
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146 ngx_http_copy_filter_init(ngx_cycle_t *cycle)
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147 {
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148 ngx_http_next_filter = ngx_http_top_body_filter;
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149 ngx_http_top_body_filter = ngx_http_copy_filter;
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150
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151 return NGX_OK;
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152 }
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153
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