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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 child */
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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, *redirect_cleanup;
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79 ngx_http_log_ctx_t *ctx;
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80 ngx_http_core_loc_conf_t *clcf;
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81 ngx_http_static_loc_conf_t *slcf;
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82 #if (NGX_HTTP_CACHE)
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83 uint32_t file_crc, redirect_crc;
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84 ngx_http_cache_t *file, *redirect;
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85 #endif
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86
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87 if (r->uri.data[r->uri.len - 1] == '/') {
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88 return NGX_DECLINED;
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89 }
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90
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91 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
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92 return NGX_HTTP_NOT_ALLOWED;
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93 }
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94
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95 rc = ngx_http_discard_body(r);
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96
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97 if (rc != NGX_OK && rc != NGX_AGAIN) {
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98 return rc;
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99 }
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100
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101 #if (NGX_HTTP_CACHE)
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102
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103 /*
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104 * there is a valid cached open file, i.e by the index handler,
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105 * and it should be already registered in r->cleanup
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106 */
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107
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108 if (r->cache && !r->cache->expired) {
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109 return ngx_http_send_cached(r);
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110 }
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111
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112 #endif
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113
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114 log = r->connection->log;
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115
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116 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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117
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118 /*
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119 * make a file name, reserve 2 bytes for a trailing '/'
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120 * in a possible redirect and for the last '\0'
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121 */
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122
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123 if (clcf->alias) {
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124 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2
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125 - clcf->name.len);
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126 if (name.data == NULL) {
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127 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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128 }
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129
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130 last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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131 last = ngx_cpystrn(last, r->uri.data + clcf->name.len,
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132 r->uri.len + 1 - clcf->name.len);
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133
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134 name.len = last - name.data;
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135
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136 location.data = ngx_palloc(r->pool, r->uri.len + 2);
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137 if (location.data == NULL) {
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138 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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139 }
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140
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141 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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142
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143 #if 0
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144 /*
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145 * aliases usually have trailling "/",
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146 * set it in the start of the possible redirect
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147 */
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148
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149 if (*location.data != '/') {
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150 location.data--;
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151 }
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152 #endif
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153
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154 location.len = last - location.data + 1;
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155
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156 } else {
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157 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
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158 if (name.data == NULL) {
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159 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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160 }
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161
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162 location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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163 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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164
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165 name.len = last - name.data;
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166 location.len = last - location.data + 1;
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167 }
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168
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169 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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170 "http filename: \"%s\"", name.data);
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171
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172
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173 /* allocate cleanups */
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174
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175 if (!(file_cleanup = ngx_push_array(&r->cleanup))) {
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176 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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177 }
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178 file_cleanup->valid = 0;
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179
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180 slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module);
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181 if (slcf->redirect_cache) {
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182 if (!(redirect_cleanup = ngx_push_array(&r->cleanup))) {
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183 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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184 }
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185 redirect_cleanup->valid = 0;
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186
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187 } else {
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188 redirect_cleanup = NULL;
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189 }
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190
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191 #if (NGX_HTTP_CACHE)
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192
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193 /* look up an open files cache */
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194
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195 if (clcf->open_files) {
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196 file = ngx_http_cache_get(clcf->open_files, file_cleanup,
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197 &name, &file_crc);
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198
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199 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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10
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200 "http open file cache get: %p", file);
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0
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201
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202 if (file && !file->expired) {
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203 r->cache = file;
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204 return ngx_http_send_cached(r);
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205 }
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206
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207 } else {
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208 file = NULL;
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209 }
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210
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211
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212 /* look up an redirect cache */
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213
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214 if (slcf->redirect_cache) {
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215 redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup,
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216 &name, &redirect_crc);
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217
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218 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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219 "http redirect cache get: %p", redirect);
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0
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220
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221 if (redirect && !redirect->expired) {
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222
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223 /*
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224 * We do not copy a cached value so the cache entry is locked
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225 * until the end of the request. In a single threaded model
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226 * the redirected request should complete before other event
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227 * will be processed. In a multithreaded model this locking
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228 * should keep more popular redirects in cache.
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229 */
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230
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231 if (!(r->headers_out.location =
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232 ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
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233 {
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234 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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235 }
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236
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237 r->headers_out.location->value = redirect->data.value;
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238
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239 return NGX_HTTP_MOVED_PERMANENTLY;
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240 }
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241
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242 } else {
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243 redirect = NULL;
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244 }
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245
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246 #endif
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247
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248 /* open file */
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249
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10
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250 #if (NGX_WIN9X)
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0
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251
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252 /* TODO: redirect cache */
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253
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254 if (ngx_win32_version < NGX_WIN_NT) {
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255
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256 /*
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257 * there is no way to open a file or a directory in Win9X with
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258 * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
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259 * so we need to check its type before the opening
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260 */
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261
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262 if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
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263 err = ngx_errno;
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264 ngx_log_error(NGX_LOG_ERR, log, err,
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265 ngx_file_info_n " \"%s\" failed", name.data);
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266
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267 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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268 return NGX_HTTP_NOT_FOUND;
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269
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270 } else if (err == NGX_EACCES) {
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271 return NGX_HTTP_FORBIDDEN;
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272
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273 } else {
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274 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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275 }
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276 }
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277
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278 if (ngx_is_dir(&fi)) {
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10
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279 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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280 "HTTP DIR: \"%s\"", name.data);
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0
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281
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282 if (!(r->headers_out.location =
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283 ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
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284 {
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285 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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286 }
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287
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288 *last++ = '/';
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289 *last = '\0';
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290 r->headers_out.location->value.len = last - location;
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291 r->headers_out.location->value.data = location;
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292
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293 return NGX_HTTP_MOVED_PERMANENTLY;
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294 }
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295 }
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296
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297 #endif
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298
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299
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300 fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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301
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302 if (fd == NGX_INVALID_FILE) {
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303 err = ngx_errno;
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304
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305 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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306 level = NGX_LOG_ERR;
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307 rc = NGX_HTTP_NOT_FOUND;
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308
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309 } else if (err == NGX_EACCES) {
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310 level = NGX_LOG_ERR;
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311 rc = NGX_HTTP_FORBIDDEN;
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312
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313 } else {
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314 level = NGX_LOG_CRIT;
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315 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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316 }
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317
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318 ngx_log_error(level, log, err,
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319 ngx_open_file_n " \"%s\" failed", name.data);
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320
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321 return rc;
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322 }
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323
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324 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
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325
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326 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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327 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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328 ngx_fd_info_n " \"%s\" failed", name.data);
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329
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330 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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331 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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332 ngx_close_file_n " \"%s\" failed", name.data);
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333 }
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334
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335 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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336 }
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337
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338 if (ngx_is_dir(&fi)) {
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339
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340 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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341
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342 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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343 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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344 ngx_close_file_n " \"%s\" failed", name.data);
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345 }
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346
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347 *last++ = '/';
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348 *last = '\0';
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349
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350 r->headers_out.location = ngx_list_push(&r->headers_out.headers);
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351 if (r->headers_out.location == NULL) {
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352 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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353 }
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354
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355 r->headers_out.location->value = location;
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356
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357 #if (NGX_HTTP_CACHE)
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358
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359 if (slcf->redirect_cache) {
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360 if (redirect) {
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361 if (location.len == redirect->data.value.len
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362 && ngx_memcmp(redirect->data.value.data, location.data,
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363 location.len) == 0)
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364 {
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365 redirect->accessed = ngx_cached_time;
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366 redirect->updated = ngx_cached_time;
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367
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368 /*
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369 * we can unlock the cache entry because
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370 * we have the local copy anyway
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371 */
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372
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373 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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374 redirect_cleanup->valid = 0;
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375
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376 return NGX_HTTP_MOVED_PERMANENTLY;
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377 }
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378 }
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379
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380 location.len++;
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381 redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect,
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382 redirect_cleanup,
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383 &name, redirect_crc,
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384 &location, log);
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385 location.len--;
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386
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387 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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10
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388 "http redirect cache alloc: %p", redirect);
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0
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389
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390 if (redirect) {
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391 redirect->fd = NGX_INVALID_FILE;
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392 redirect->accessed = ngx_cached_time;
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393 redirect->last_modified = 0;
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394 redirect->updated = ngx_cached_time;
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395 redirect->memory = 1;
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396 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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397 redirect_cleanup->valid = 0;
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398 }
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399
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400 }
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401
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402 #endif
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403
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404 return NGX_HTTP_MOVED_PERMANENTLY;
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405 }
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406
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10
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407 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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0
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408
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409 if (!ngx_is_file(&fi)) {
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410 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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10
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411 "\"%s\" is not a regular file", name.data);
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0
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412
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413 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
|
414 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
415 ngx_close_file_n " \"%s\" failed", name.data);
|
|
|
416 }
|
|
|
417
|
|
|
418 return NGX_HTTP_NOT_FOUND;
|
|
|
419 }
|
|
|
420
|
|
|
421 #endif
|
|
|
422
|
|
|
423
|
|
|
424 #if (NGX_HTTP_CACHE)
|
|
|
425
|
|
|
426 if (clcf->open_files) {
|
|
|
427
|
|
|
428 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
|
|
|
429
|
|
|
430 if (file && file->uniq == ngx_file_uniq(&fi)) {
|
|
|
431 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
|
432 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
433 ngx_close_file_n " \"%s\" failed", name.data);
|
|
|
434 }
|
|
|
435 file->accessed = ngx_cached_time;
|
|
|
436 file->updated = ngx_cached_time;
|
|
|
437 file->expired = 0;
|
|
|
438 r->cache = file;
|
|
|
439
|
|
|
440 return ngx_http_send_cached(r);
|
|
|
441
|
|
|
442 } else {
|
|
|
443 if (file) {
|
|
|
444 ngx_http_cache_unlock(clcf->open_files, file, log);
|
|
|
445 file = NULL;
|
|
|
446 }
|
|
|
447
|
|
|
448 file = ngx_http_cache_alloc(clcf->open_files, file,
|
|
|
449 file_cleanup,
|
|
|
450 &name, file_crc, NULL, log);
|
|
|
451 if (file) {
|
|
|
452 file->uniq = ngx_file_uniq(&fi);
|
|
|
453 }
|
|
|
454 }
|
|
|
455
|
|
|
456 #else
|
|
|
457 file = ngx_http_cache_alloc(clcf->open_files, file,
|
|
|
458 file_cleanup,
|
|
|
459 &name, file_crc, NULL, log);
|
|
|
460 #endif
|
|
|
461
|
|
|
462 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
|
|
10
|
463 "http open file cache alloc: %p", file);
|
|
0
|
464
|
|
|
465 if (file) {
|
|
|
466 file->fd = fd;
|
|
|
467 file->data.size = ngx_file_size(&fi);
|
|
|
468 file->accessed = ngx_cached_time;
|
|
|
469 file->last_modified = ngx_file_mtime(&fi);
|
|
|
470 file->updated = ngx_cached_time;
|
|
|
471 r->cache = file;
|
|
|
472 }
|
|
|
473
|
|
|
474 return ngx_http_send_cached(r);
|
|
|
475 }
|
|
|
476
|
|
|
477 #endif
|
|
|
478
|
|
|
479 ctx = log->data;
|
|
|
480 ctx->action = "sending response to client";
|
|
|
481
|
|
|
482 file_cleanup->data.file.fd = fd;
|
|
|
483 file_cleanup->data.file.name = name.data;
|
|
|
484 file_cleanup->valid = 1;
|
|
|
485 file_cleanup->cache = 0;
|
|
|
486
|
|
|
487 r->headers_out.status = NGX_HTTP_OK;
|
|
|
488 r->headers_out.content_length_n = ngx_file_size(&fi);
|
|
|
489 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
|
|
|
490
|
|
|
491 if (r->headers_out.content_length_n == 0) {
|
|
|
492 r->header_only = 1;
|
|
|
493 }
|
|
|
494
|
|
|
495 if (ngx_http_set_content_type(r) != NGX_OK) {
|
|
|
496 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
497 }
|
|
|
498
|
|
|
499 #if (NGX_SUPPRESS_WARN)
|
|
|
500 b = NULL;
|
|
|
501 #endif
|
|
|
502
|
|
|
503 if (!r->header_only) {
|
|
|
504 /* we need to allocate all before the header would be sent */
|
|
|
505
|
|
|
506 if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) {
|
|
|
507 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
508 }
|
|
|
509
|
|
|
510 if (!(b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)))) {
|
|
|
511 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
512 }
|
|
|
513
|
|
|
514 r->filter_allow_ranges = 1;
|
|
|
515 }
|
|
|
516
|
|
|
517 rc = ngx_http_send_header(r);
|
|
|
518
|
|
|
519 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
|
|
|
520 return rc;
|
|
|
521 }
|
|
|
522
|
|
|
523 b->in_file = 1;
|
|
|
524
|
|
|
525 if (!r->main) {
|
|
|
526 b->last_buf = 1;
|
|
|
527 }
|
|
|
528
|
|
|
529 b->file_pos = 0;
|
|
|
530 b->file_last = ngx_file_size(&fi);
|
|
|
531
|
|
|
532 b->file->fd = fd;
|
|
14
|
533 b->file->name = name;
|
|
0
|
534 b->file->log = log;
|
|
|
535
|
|
|
536 out.buf = b;
|
|
|
537 out.next = NULL;
|
|
|
538
|
|
|
539 return ngx_http_output_filter(r, &out);
|
|
|
540 }
|
|
|
541
|
|
|
542
|
|
|
543 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf)
|
|
|
544 {
|
|
|
545 ngx_http_static_loc_conf_t *conf;
|
|
|
546
|
|
|
547 if (!(conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t)))) {
|
|
|
548 return NGX_CONF_ERROR;
|
|
|
549 }
|
|
|
550
|
|
|
551 conf->redirect_cache = NULL;
|
|
|
552
|
|
|
553 return conf;
|
|
|
554 }
|
|
|
555
|
|
|
556
|
|
|
557 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
|
|
|
558 void *parent, void *child)
|
|
|
559 {
|
|
|
560 ngx_http_static_loc_conf_t *prev = parent;
|
|
|
561 ngx_http_static_loc_conf_t *conf = child;
|
|
|
562
|
|
|
563 if (conf->redirect_cache == NULL) {
|
|
|
564 conf->redirect_cache = prev->redirect_cache;
|
|
|
565 }
|
|
|
566
|
|
|
567 return NGX_CONF_OK;
|
|
|
568 }
|
|
|
569
|
|
|
570
|
|
|
571 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle)
|
|
|
572 {
|
|
|
573 ngx_http_handler_pt *h;
|
|
|
574 ngx_http_core_main_conf_t *cmcf;
|
|
|
575
|
|
|
576 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
577
|
|
|
578 h = ngx_push_array(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
579 if (h == NULL) {
|
|
|
580 return NGX_ERROR;
|
|
|
581 }
|
|
|
582
|
|
|
583 *h = ngx_http_static_handler;
|
|
|
584
|
|
|
585 return NGX_OK;
|
|
|
586 }
|
