50
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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_http_cache_hash_t *redirect_cache;
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14 } ngx_http_static_loc_conf_t;
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15
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16
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17 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r);
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18 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf);
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19 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
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20 void *parent, void *child);
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21 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle);
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22
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23
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24 static ngx_command_t ngx_http_static_commands[] = {
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25
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26 #if (NGX_HTTP_CACHE)
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27
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28 { ngx_string("redirect_cache"),
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29 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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30 ngx_http_set_cache_slot,
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31 NGX_HTTP_LOC_CONF_OFFSET,
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32 offsetof(ngx_http_static_loc_conf_t, redirect_cache),
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33 NULL },
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34
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35 #endif
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36
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37 ngx_null_command
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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 ngx_http_module_t ngx_http_static_module_ctx = {
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43 NULL, /* pre conf */
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44
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45 NULL, /* create main configuration */
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46 NULL, /* init main configuration */
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47
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48 NULL, /* create server configuration */
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49 NULL, /* merge server configuration */
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50
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51 ngx_http_static_create_loc_conf, /* create location configuration */
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52 ngx_http_static_merge_loc_conf /* merge location configuration */
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53 };
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54
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55
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56 ngx_module_t ngx_http_static_module = {
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57 NGX_MODULE,
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58 &ngx_http_static_module_ctx, /* module context */
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59 ngx_http_static_commands, /* module directives */
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60 NGX_HTTP_MODULE, /* module type */
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61 ngx_http_static_init, /* init module */
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62 NULL /* init process */
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63 };
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64
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65
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66 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r)
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67 {
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68 u_char *last;
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69 ngx_fd_t fd;
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70 ngx_int_t rc;
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71 ngx_uint_t level;
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72 ngx_str_t name, location;
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73 ngx_err_t err;
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74 ngx_log_t *log;
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75 ngx_buf_t *b;
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76 ngx_chain_t out;
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77 ngx_file_info_t fi;
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78 ngx_http_cleanup_t *file_cleanup;
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79 #if (NGX_HTTP_CACHE)
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80 ngx_http_cleanup_t *redirect_cleanup;
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81 #endif
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82 ngx_http_core_loc_conf_t *clcf;
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83 #if (NGX_HTTP_CACHE)
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84 ngx_http_static_loc_conf_t *slcf;
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85 uint32_t file_crc, redirect_crc;
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86 ngx_http_cache_t *file, *redirect;
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87 #endif
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88
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89 if (r->uri.data[r->uri.len - 1] == '/') {
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90 return NGX_DECLINED;
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91 }
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92
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93 /* TODO: Win32 */
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94 if (r->zero_in_uri) {
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95 return NGX_DECLINED;
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96 }
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97
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98 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
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99 return NGX_HTTP_NOT_ALLOWED;
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100 }
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101
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102 rc = ngx_http_discard_body(r);
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103
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104 if (rc != NGX_OK && rc != NGX_AGAIN) {
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105 return rc;
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106 }
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107
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108 #if (NGX_HTTP_CACHE)
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109
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110 /*
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111 * there is a valid cached open file, i.e by the index handler,
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112 * and it should be already registered in r->cleanup
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113 */
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114
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115 if (r->cache && !r->cache->expired) {
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116 return ngx_http_send_cached(r);
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117 }
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118
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119 #endif
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120
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121 log = r->connection->log;
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122
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123 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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124
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125 /*
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126 * make a file name, reserve 2 bytes for a trailing '/'
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127 * in a possible redirect and for the last '\0'
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128 */
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129
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130 if (clcf->alias) {
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131 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2
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132 - clcf->name.len);
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133 if (name.data == NULL) {
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134 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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135 }
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136
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137 last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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138 last = ngx_cpystrn(last, r->uri.data + clcf->name.len,
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139 r->uri.len + 1 - clcf->name.len);
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140
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141 name.len = last - name.data;
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142
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143 location.data = ngx_palloc(r->pool, r->uri.len + 2);
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144 if (location.data == NULL) {
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145 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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146 }
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147
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148 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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149
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150 #if 0
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151 /*
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152 * aliases usually have trailling "/",
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153 * set it in the start of the possible redirect
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154 */
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155
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156 if (*location.data != '/') {
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157 location.data--;
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158 }
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159 #endif
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160
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161 location.len = last - location.data + 1;
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162
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163 } else {
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164 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
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165 if (name.data == NULL) {
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166 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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167 }
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168
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169 location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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170 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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171
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172 name.len = last - name.data;
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173 location.len = last - location.data + 1;
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174 }
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175
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176 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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177 "http filename: \"%s\"", name.data);
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178
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179
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180 /* allocate cleanups */
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181
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182 file_cleanup = ngx_array_push(&r->cleanup);
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183 if (file_cleanup == NULL) {
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184 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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185 }
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186 file_cleanup->valid = 0;
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187
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188 #if (NGX_HTTP_CACHE)
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189
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190 slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module);
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191 if (slcf->redirect_cache) {
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192 redirect_cleanup = ngx_array_push(&r->cleanup);
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193 if (redirect_cleanup == NULL) {
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194 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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195 }
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196 redirect_cleanup->valid = 0;
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197
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198 } else {
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199 redirect_cleanup = NULL;
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200 }
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201
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202 /* look up an open files cache */
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203
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204 if (clcf->open_files) {
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205 file = ngx_http_cache_get(clcf->open_files, file_cleanup,
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206 &name, &file_crc);
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207
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208 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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209 "http open file cache get: %p", file);
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210
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211 if (file && !file->expired) {
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212 r->cache = file;
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213 return ngx_http_send_cached(r);
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214 }
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215
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216 } else {
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217 file = NULL;
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218 }
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219
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220
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221 /* look up an redirect cache */
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222
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223 if (slcf->redirect_cache) {
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224 redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup,
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225 &name, &redirect_crc);
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226
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227 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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228 "http redirect cache get: %p", redirect);
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229
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230 if (redirect && !redirect->expired) {
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231
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232 /*
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233 * We do not copy a cached value so the cache entry is locked
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234 * until the end of the request. In a single threaded model
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235 * the redirected request should complete before other event
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236 * will be processed. In a multithreaded model this locking
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237 * should keep more popular redirects in cache.
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238 */
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239
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240 r->headers_out.location = ngx_http_add_header(&r->headers_out,
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241 ngx_http_headers_out);
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242 if (r->headers_out.location == NULL) {
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243 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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244 }
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245
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246 r->headers_out.location->value = redirect->data.value;
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247
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248 return NGX_HTTP_MOVED_PERMANENTLY;
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249 }
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250
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251 } else {
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252 redirect = NULL;
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253 }
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254
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255 #endif
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256
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257 /* open file */
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258
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259 #if (NGX_WIN9X)
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260
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261 /* TODO: redirect cache */
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262
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263 if (ngx_win32_version < NGX_WIN_NT) {
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264
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265 /*
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266 * there is no way to open a file or a directory in Win9X with
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267 * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
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268 * so we need to check its type before the opening
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269 */
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270
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271 if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
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272 err = ngx_errno;
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273 ngx_log_error(NGX_LOG_ERR, log, err,
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274 ngx_file_info_n " \"%s\" failed", name.data);
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275
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276 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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277 return NGX_HTTP_NOT_FOUND;
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278
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279 } else if (err == NGX_EACCES) {
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280 return NGX_HTTP_FORBIDDEN;
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281
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282 } else {
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283 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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284 }
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285 }
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286
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287 if (ngx_is_dir(&fi)) {
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288 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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289 "HTTP DIR: \"%s\"", name.data);
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290
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291 r->headers_out.location = ngx_http_add_header(&r->headers_out,
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292 ngx_http_headers_out);
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293 if (r->headers_out.location == NULL) {
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294 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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295 }
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296
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297 *last++ = '/';
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298 *last = '\0';
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299 r->headers_out.location->value.len = last - location;
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300 r->headers_out.location->value.data = location;
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301
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302 return NGX_HTTP_MOVED_PERMANENTLY;
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303 }
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304 }
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305
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306 #endif
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307
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308
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309 fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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310
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311 if (fd == NGX_INVALID_FILE) {
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312 err = ngx_errno;
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313
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314 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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315 level = NGX_LOG_ERR;
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316 rc = NGX_HTTP_NOT_FOUND;
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317
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318 } else if (err == NGX_EACCES) {
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319 level = NGX_LOG_ERR;
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320 rc = NGX_HTTP_FORBIDDEN;
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321
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322 } else {
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323 level = NGX_LOG_CRIT;
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324 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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325 }
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326
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327 ngx_log_error(level, log, err,
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328 ngx_open_file_n " \"%s\" failed", name.data);
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329
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330 return rc;
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331 }
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332
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333 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
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334
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335 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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336 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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337 ngx_fd_info_n " \"%s\" failed", name.data);
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338
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339 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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340 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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341 ngx_close_file_n " \"%s\" failed", name.data);
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342 }
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343
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344 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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345 }
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346
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347 if (ngx_is_dir(&fi)) {
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348
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349 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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350
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351 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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352 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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353 ngx_close_file_n " \"%s\" failed", name.data);
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354 }
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355
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356 *last++ = '/';
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357 *last = '\0';
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358
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359 r->headers_out.location = ngx_list_push(&r->headers_out.headers);
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360 if (r->headers_out.location == NULL) {
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361 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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362 }
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363
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364 r->headers_out.location->value = location;
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365
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366 #if (NGX_HTTP_CACHE)
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367
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368 if (slcf->redirect_cache) {
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369 if (redirect) {
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370 if (location.len == redirect->data.value.len
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371 && ngx_memcmp(redirect->data.value.data, location.data,
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372 location.len) == 0)
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373 {
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374 redirect->accessed = ngx_cached_time;
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375 redirect->updated = ngx_cached_time;
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376
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377 /*
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378 * we can unlock the cache entry because
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379 * we have the local copy anyway
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380 */
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381
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382 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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383 redirect_cleanup->valid = 0;
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384
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385 return NGX_HTTP_MOVED_PERMANENTLY;
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386 }
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387 }
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388
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389 location.len++;
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390 redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect,
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391 redirect_cleanup,
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392 &name, redirect_crc,
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393 &location, log);
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394 location.len--;
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395
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396 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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397 "http redirect cache alloc: %p", redirect);
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398
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399 if (redirect) {
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400 redirect->fd = NGX_INVALID_FILE;
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401 redirect->accessed = ngx_cached_time;
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402 redirect->last_modified = 0;
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403 redirect->updated = ngx_cached_time;
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404 redirect->memory = 1;
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405 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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406 redirect_cleanup->valid = 0;
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407 }
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408
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409 }
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410
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411 #endif
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412
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413 return NGX_HTTP_MOVED_PERMANENTLY;
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414 }
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415
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416 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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417
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418 if (!ngx_is_file(&fi)) {
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419 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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420 "\"%s\" is not a regular file", name.data);
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421
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422 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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423 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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424 ngx_close_file_n " \"%s\" failed", name.data);
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425 }
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426
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427 return NGX_HTTP_NOT_FOUND;
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428 }
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429
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430 #endif
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431
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432
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433 #if (NGX_HTTP_CACHE)
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434
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435 if (clcf->open_files) {
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436
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437 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
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438
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439 if (file && file->uniq == ngx_file_uniq(&fi)) {
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440 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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441 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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442 ngx_close_file_n " \"%s\" failed", name.data);
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443 }
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444 file->accessed = ngx_cached_time;
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445 file->updated = ngx_cached_time;
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446 file->expired = 0;
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447 r->cache = file;
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448
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449 return ngx_http_send_cached(r);
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450
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451 } else {
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452 if (file) {
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453 ngx_http_cache_unlock(clcf->open_files, file, log);
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454 file = NULL;
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455 }
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456
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457 file = ngx_http_cache_alloc(clcf->open_files, file,
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458 file_cleanup,
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459 &name, file_crc, NULL, log);
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460 if (file) {
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461 file->uniq = ngx_file_uniq(&fi);
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462 }
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463 }
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464
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465 #else
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466 file = ngx_http_cache_alloc(clcf->open_files, file,
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467 file_cleanup,
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468 &name, file_crc, NULL, log);
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469 #endif
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470
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471 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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472 "http open file cache alloc: %p", file);
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473
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474 if (file) {
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475 file->fd = fd;
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476 file->data.size = ngx_file_size(&fi);
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477 file->accessed = ngx_cached_time;
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478 file->last_modified = ngx_file_mtime(&fi);
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479 file->updated = ngx_cached_time;
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480 r->cache = file;
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481 }
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482
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483 return ngx_http_send_cached(r);
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484 }
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485
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486 #endif
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487
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488 log->action = "sending response to client";
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489
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490 file_cleanup->data.file.fd = fd;
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491 file_cleanup->data.file.name = name.data;
|
|
492 file_cleanup->valid = 1;
|
|
493 file_cleanup->cache = 0;
|
|
494
|
|
495 r->headers_out.status = NGX_HTTP_OK;
|
|
496 r->headers_out.content_length_n = ngx_file_size(&fi);
|
|
497 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
|
|
498
|
|
499 if (r->headers_out.content_length_n == 0) {
|
|
500 r->header_only = 1;
|
|
501 }
|
|
502
|
|
503 if (ngx_http_set_content_type(r) != NGX_OK) {
|
|
504 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
505 }
|
|
506
|
|
507 #if (NGX_SUPPRESS_WARN)
|
|
508 b = NULL;
|
|
509 #endif
|
|
510
|
|
511 if (!r->header_only) {
|
|
512 /* we need to allocate all before the header would be sent */
|
|
513
|
|
514 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
515 if (b == NULL) {
|
|
516 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
517 }
|
|
518
|
|
519 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
|
|
520 if (b->file == NULL) {
|
|
521 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
522 }
|
|
523
|
|
524 r->filter_allow_ranges = 1;
|
|
525 }
|
|
526
|
|
527 rc = ngx_http_send_header(r);
|
|
528
|
|
529 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
|
|
530 return rc;
|
|
531 }
|
|
532
|
|
533 b->in_file = 1;
|
|
534
|
|
535 if (!r->main) {
|
|
536 b->last_buf = 1;
|
|
537 }
|
|
538
|
|
539 b->file_pos = 0;
|
|
540 b->file_last = ngx_file_size(&fi);
|
|
541
|
|
542 b->file->fd = fd;
|
|
543 b->file->name = name;
|
|
544 b->file->log = log;
|
|
545
|
|
546 out.buf = b;
|
|
547 out.next = NULL;
|
|
548
|
|
549 return ngx_http_output_filter(r, &out);
|
|
550 }
|
|
551
|
|
552
|
|
553 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf)
|
|
554 {
|
|
555 ngx_http_static_loc_conf_t *conf;
|
|
556
|
|
557 conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t));
|
|
558 if (conf == NULL) {
|
|
559 return NGX_CONF_ERROR;
|
|
560 }
|
|
561
|
|
562 conf->redirect_cache = NULL;
|
|
563
|
|
564 return conf;
|
|
565 }
|
|
566
|
|
567
|
|
568 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
|
|
569 void *parent, void *child)
|
|
570 {
|
|
571 ngx_http_static_loc_conf_t *prev = parent;
|
|
572 ngx_http_static_loc_conf_t *conf = child;
|
|
573
|
|
574 if (conf->redirect_cache == NULL) {
|
|
575 conf->redirect_cache = prev->redirect_cache;
|
|
576 }
|
|
577
|
|
578 return NGX_CONF_OK;
|
|
579 }
|
|
580
|
|
581
|
|
582 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle)
|
|
583 {
|
|
584 ngx_http_handler_pt *h;
|
|
585 ngx_http_core_main_conf_t *cmcf;
|
|
586
|
|
587 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
588
|
|
589 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
590 if (h == NULL) {
|
|
591 return NGX_ERROR;
|
|
592 }
|
|
593
|
|
594 *h = ngx_http_static_handler;
|
|
595
|
|
596 return NGX_OK;
|
|
597 }
|