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0
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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_core_loc_conf_t *clcf;
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80 ngx_http_static_loc_conf_t *slcf;
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81 #if (NGX_HTTP_CACHE)
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82 uint32_t file_crc, redirect_crc;
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83 ngx_http_cache_t *file, *redirect;
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84 #endif
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85
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86 if (r->uri.data[r->uri.len - 1] == '/') {
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87 return NGX_DECLINED;
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88 }
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89
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90 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
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91 return NGX_HTTP_NOT_ALLOWED;
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92 }
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93
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94 rc = ngx_http_discard_body(r);
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95
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96 if (rc != NGX_OK && rc != NGX_AGAIN) {
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97 return rc;
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98 }
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99
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100 #if (NGX_HTTP_CACHE)
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101
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102 /*
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103 * there is a valid cached open file, i.e by the index handler,
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104 * and it should be already registered in r->cleanup
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105 */
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106
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107 if (r->cache && !r->cache->expired) {
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108 return ngx_http_send_cached(r);
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109 }
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110
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111 #endif
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112
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113 log = r->connection->log;
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114
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115 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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116
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117 /*
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118 * make a file name, reserve 2 bytes for a trailing '/'
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119 * in a possible redirect and for the last '\0'
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120 */
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121
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122 if (clcf->alias) {
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123 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2
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124 - clcf->name.len);
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125 if (name.data == NULL) {
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126 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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127 }
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128
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129 last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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130 last = ngx_cpystrn(last, r->uri.data + clcf->name.len,
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131 r->uri.len + 1 - clcf->name.len);
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132
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133 name.len = last - name.data;
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134
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135 location.data = ngx_palloc(r->pool, r->uri.len + 2);
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136 if (location.data == NULL) {
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137 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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138 }
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139
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140 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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141
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142 #if 0
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143 /*
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144 * aliases usually have trailling "/",
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145 * set it in the start of the possible redirect
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146 */
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147
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148 if (*location.data != '/') {
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149 location.data--;
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150 }
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151 #endif
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152
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153 location.len = last - location.data + 1;
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154
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155 } else {
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156 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
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157 if (name.data == NULL) {
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158 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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159 }
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160
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161 location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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162 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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163
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164 name.len = last - name.data;
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165 location.len = last - location.data + 1;
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166 }
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167
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168 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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169 "http filename: \"%s\"", name.data);
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170
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171
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172 /* allocate cleanups */
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173
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174 if (!(file_cleanup = ngx_push_array(&r->cleanup))) {
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175 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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176 }
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177 file_cleanup->valid = 0;
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178
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179 slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module);
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180 if (slcf->redirect_cache) {
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181 if (!(redirect_cleanup = ngx_push_array(&r->cleanup))) {
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182 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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183 }
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184 redirect_cleanup->valid = 0;
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185
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186 } else {
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187 redirect_cleanup = NULL;
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188 }
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189
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190 #if (NGX_HTTP_CACHE)
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191
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192 /* look up an open files cache */
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193
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194 if (clcf->open_files) {
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195 file = ngx_http_cache_get(clcf->open_files, file_cleanup,
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196 &name, &file_crc);
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197
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198 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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10
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199 "http open file cache get: %p", file);
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0
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200
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201 if (file && !file->expired) {
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202 r->cache = file;
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203 return ngx_http_send_cached(r);
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204 }
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205
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206 } else {
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207 file = NULL;
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208 }
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209
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210
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211 /* look up an redirect cache */
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212
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213 if (slcf->redirect_cache) {
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214 redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup,
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215 &name, &redirect_crc);
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216
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217 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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218 "http redirect cache get: %p", redirect);
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0
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219
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220 if (redirect && !redirect->expired) {
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221
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222 /*
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223 * We do not copy a cached value so the cache entry is locked
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224 * until the end of the request. In a single threaded model
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225 * the redirected request should complete before other event
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226 * will be processed. In a multithreaded model this locking
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227 * should keep more popular redirects in cache.
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228 */
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229
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230 if (!(r->headers_out.location =
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231 ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
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232 {
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233 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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234 }
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235
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236 r->headers_out.location->value = redirect->data.value;
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237
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238 return NGX_HTTP_MOVED_PERMANENTLY;
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239 }
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240
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241 } else {
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242 redirect = NULL;
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243 }
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244
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245 #endif
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246
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247 /* open file */
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248
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10
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249 #if (NGX_WIN9X)
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0
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250
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251 /* TODO: redirect cache */
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252
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253 if (ngx_win32_version < NGX_WIN_NT) {
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254
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255 /*
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256 * there is no way to open a file or a directory in Win9X with
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257 * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
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258 * so we need to check its type before the opening
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259 */
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260
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261 if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
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262 err = ngx_errno;
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263 ngx_log_error(NGX_LOG_ERR, log, err,
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264 ngx_file_info_n " \"%s\" failed", name.data);
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265
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266 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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267 return NGX_HTTP_NOT_FOUND;
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268
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269 } else if (err == NGX_EACCES) {
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270 return NGX_HTTP_FORBIDDEN;
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271
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272 } else {
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273 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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274 }
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275 }
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276
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277 if (ngx_is_dir(&fi)) {
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10
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278 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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279 "HTTP DIR: \"%s\"", name.data);
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0
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280
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281 if (!(r->headers_out.location =
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282 ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
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283 {
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284 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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285 }
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286
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287 *last++ = '/';
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288 *last = '\0';
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289 r->headers_out.location->value.len = last - location;
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290 r->headers_out.location->value.data = location;
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291
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292 return NGX_HTTP_MOVED_PERMANENTLY;
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293 }
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294 }
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295
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296 #endif
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297
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298
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299 fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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300
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301 if (fd == NGX_INVALID_FILE) {
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302 err = ngx_errno;
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303
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304 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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305 level = NGX_LOG_ERR;
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306 rc = NGX_HTTP_NOT_FOUND;
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307
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308 } else if (err == NGX_EACCES) {
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309 level = NGX_LOG_ERR;
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310 rc = NGX_HTTP_FORBIDDEN;
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311
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312 } else {
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313 level = NGX_LOG_CRIT;
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314 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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315 }
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316
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317 ngx_log_error(level, log, err,
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318 ngx_open_file_n " \"%s\" failed", name.data);
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319
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320 return rc;
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321 }
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322
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323 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
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324
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325 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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326 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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327 ngx_fd_info_n " \"%s\" failed", name.data);
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328
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329 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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330 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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331 ngx_close_file_n " \"%s\" failed", name.data);
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332 }
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333
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334 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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335 }
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336
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337 if (ngx_is_dir(&fi)) {
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338
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339 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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340
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341 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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342 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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343 ngx_close_file_n " \"%s\" failed", name.data);
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344 }
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345
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346 *last++ = '/';
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347 *last = '\0';
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348
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349 r->headers_out.location = ngx_list_push(&r->headers_out.headers);
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350 if (r->headers_out.location == NULL) {
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351 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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352 }
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353
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354 r->headers_out.location->value = location;
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355
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356 #if (NGX_HTTP_CACHE)
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357
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358 if (slcf->redirect_cache) {
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359 if (redirect) {
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360 if (location.len == redirect->data.value.len
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361 && ngx_memcmp(redirect->data.value.data, location.data,
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362 location.len) == 0)
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363 {
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364 redirect->accessed = ngx_cached_time;
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365 redirect->updated = ngx_cached_time;
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366
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367 /*
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368 * we can unlock the cache entry because
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369 * we have the local copy anyway
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370 */
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371
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372 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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373 redirect_cleanup->valid = 0;
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374
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375 return NGX_HTTP_MOVED_PERMANENTLY;
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376 }
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377 }
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378
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379 location.len++;
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380 redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect,
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381 redirect_cleanup,
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382 &name, redirect_crc,
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383 &location, log);
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384 location.len--;
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385
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386 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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10
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387 "http redirect cache alloc: %p", redirect);
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0
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388
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389 if (redirect) {
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390 redirect->fd = NGX_INVALID_FILE;
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391 redirect->accessed = ngx_cached_time;
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392 redirect->last_modified = 0;
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393 redirect->updated = ngx_cached_time;
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394 redirect->memory = 1;
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395 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
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396 redirect_cleanup->valid = 0;
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397 }
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398
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399 }
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400
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401 #endif
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402
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403 return NGX_HTTP_MOVED_PERMANENTLY;
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404 }
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405
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10
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406 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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0
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407
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408 if (!ngx_is_file(&fi)) {
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409 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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10
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410 "\"%s\" is not a regular file", name.data);
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0
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411
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412 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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413 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
414 ngx_close_file_n " \"%s\" failed", name.data);
|
|
|
415 }
|
|
|
416
|
|
|
417 return NGX_HTTP_NOT_FOUND;
|
|
|
418 }
|
|
|
419
|
|
|
420 #endif
|
|
|
421
|
|
|
422
|
|
|
423 #if (NGX_HTTP_CACHE)
|
|
|
424
|
|
|
425 if (clcf->open_files) {
|
|
|
426
|
|
|
427 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
|
|
|
428
|
|
|
429 if (file && file->uniq == ngx_file_uniq(&fi)) {
|
|
|
430 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
|
431 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
432 ngx_close_file_n " \"%s\" failed", name.data);
|
|
|
433 }
|
|
|
434 file->accessed = ngx_cached_time;
|
|
|
435 file->updated = ngx_cached_time;
|
|
|
436 file->expired = 0;
|
|
|
437 r->cache = file;
|
|
|
438
|
|
|
439 return ngx_http_send_cached(r);
|
|
|
440
|
|
|
441 } else {
|
|
|
442 if (file) {
|
|
|
443 ngx_http_cache_unlock(clcf->open_files, file, log);
|
|
|
444 file = NULL;
|
|
|
445 }
|
|
|
446
|
|
|
447 file = ngx_http_cache_alloc(clcf->open_files, file,
|
|
|
448 file_cleanup,
|
|
|
449 &name, file_crc, NULL, log);
|
|
|
450 if (file) {
|
|
|
451 file->uniq = ngx_file_uniq(&fi);
|
|
|
452 }
|
|
|
453 }
|
|
|
454
|
|
|
455 #else
|
|
|
456 file = ngx_http_cache_alloc(clcf->open_files, file,
|
|
|
457 file_cleanup,
|
|
|
458 &name, file_crc, NULL, log);
|
|
|
459 #endif
|
|
|
460
|
|
|
461 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
|
|
10
|
462 "http open file cache alloc: %p", file);
|
|
0
|
463
|
|
|
464 if (file) {
|
|
|
465 file->fd = fd;
|
|
|
466 file->data.size = ngx_file_size(&fi);
|
|
|
467 file->accessed = ngx_cached_time;
|
|
|
468 file->last_modified = ngx_file_mtime(&fi);
|
|
|
469 file->updated = ngx_cached_time;
|
|
|
470 r->cache = file;
|
|
|
471 }
|
|
|
472
|
|
|
473 return ngx_http_send_cached(r);
|
|
|
474 }
|
|
|
475
|
|
|
476 #endif
|
|
|
477
|
|
32
|
478 log->action = "sending response to client";
|
|
0
|
479
|
|
|
480 file_cleanup->data.file.fd = fd;
|
|
|
481 file_cleanup->data.file.name = name.data;
|
|
|
482 file_cleanup->valid = 1;
|
|
|
483 file_cleanup->cache = 0;
|
|
|
484
|
|
|
485 r->headers_out.status = NGX_HTTP_OK;
|
|
|
486 r->headers_out.content_length_n = ngx_file_size(&fi);
|
|
|
487 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
|
|
|
488
|
|
|
489 if (r->headers_out.content_length_n == 0) {
|
|
|
490 r->header_only = 1;
|
|
|
491 }
|
|
|
492
|
|
|
493 if (ngx_http_set_content_type(r) != NGX_OK) {
|
|
|
494 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
495 }
|
|
|
496
|
|
|
497 #if (NGX_SUPPRESS_WARN)
|
|
|
498 b = NULL;
|
|
|
499 #endif
|
|
|
500
|
|
|
501 if (!r->header_only) {
|
|
|
502 /* we need to allocate all before the header would be sent */
|
|
|
503
|
|
|
504 if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) {
|
|
|
505 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
506 }
|
|
|
507
|
|
|
508 if (!(b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)))) {
|
|
|
509 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
510 }
|
|
|
511
|
|
|
512 r->filter_allow_ranges = 1;
|
|
|
513 }
|
|
|
514
|
|
|
515 rc = ngx_http_send_header(r);
|
|
|
516
|
|
|
517 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
|
|
|
518 return rc;
|
|
|
519 }
|
|
|
520
|
|
|
521 b->in_file = 1;
|
|
|
522
|
|
|
523 if (!r->main) {
|
|
|
524 b->last_buf = 1;
|
|
|
525 }
|
|
|
526
|
|
|
527 b->file_pos = 0;
|
|
|
528 b->file_last = ngx_file_size(&fi);
|
|
|
529
|
|
|
530 b->file->fd = fd;
|
|
14
|
531 b->file->name = name;
|
|
0
|
532 b->file->log = log;
|
|
|
533
|
|
|
534 out.buf = b;
|
|
|
535 out.next = NULL;
|
|
|
536
|
|
|
537 return ngx_http_output_filter(r, &out);
|
|
|
538 }
|
|
|
539
|
|
|
540
|
|
|
541 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf)
|
|
|
542 {
|
|
|
543 ngx_http_static_loc_conf_t *conf;
|
|
|
544
|
|
|
545 if (!(conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t)))) {
|
|
|
546 return NGX_CONF_ERROR;
|
|
|
547 }
|
|
|
548
|
|
|
549 conf->redirect_cache = NULL;
|
|
|
550
|
|
|
551 return conf;
|
|
|
552 }
|
|
|
553
|
|
|
554
|
|
|
555 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
|
|
|
556 void *parent, void *child)
|
|
|
557 {
|
|
|
558 ngx_http_static_loc_conf_t *prev = parent;
|
|
|
559 ngx_http_static_loc_conf_t *conf = child;
|
|
|
560
|
|
|
561 if (conf->redirect_cache == NULL) {
|
|
|
562 conf->redirect_cache = prev->redirect_cache;
|
|
|
563 }
|
|
|
564
|
|
|
565 return NGX_CONF_OK;
|
|
|
566 }
|
|
|
567
|
|
|
568
|
|
|
569 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle)
|
|
|
570 {
|
|
|
571 ngx_http_handler_pt *h;
|
|
|
572 ngx_http_core_main_conf_t *cmcf;
|
|
|
573
|
|
|
574 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
575
|
|
|
576 h = ngx_push_array(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
577 if (h == NULL) {
|
|
|
578 return NGX_ERROR;
|
|
|
579 }
|
|
|
580
|
|
|
581 *h = ngx_http_static_handler;
|
|
|
582
|
|
|
583 return NGX_OK;
|
|
|
584 }
|
