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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 ngx_http_module_t ngx_http_static_module_ctx = {
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58
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42 NULL, /* preconfiguration */
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43 NULL, /* postconfiguration */
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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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126
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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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126
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50
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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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126
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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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58
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57 NGX_MODULE_V1,
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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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90
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61 NULL, /* init master */
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62 ngx_http_static_init, /* init module */
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90
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63 NULL, /* init process */
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64 NULL, /* init thread */
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65 NULL, /* exit thread */
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66 NULL, /* exit process */
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67 NULL, /* exit master */
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68 NGX_MODULE_V1_PADDING
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69 };
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70
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71
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72 static ngx_int_t
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73 ngx_http_static_handler(ngx_http_request_t *r)
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74 {
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75 u_char *last, *location;
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76 ngx_fd_t fd;
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77 ngx_int_t rc;
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78 ngx_uint_t level;
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79 ngx_str_t path;
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80 ngx_err_t err;
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81 ngx_log_t *log;
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82 ngx_buf_t *b;
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83 ngx_chain_t out;
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84 ngx_file_info_t fi;
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85 ngx_pool_cleanup_t *cln;
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86 ngx_pool_cleanup_file_t *clnf;
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87 ngx_http_core_loc_conf_t *clcf;
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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 log = r->connection->log;
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109
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110 /*
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111 * ngx_http_map_uri_to_path() allocates memory for terminating '\0'
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112 * so we do not need to reserve memory for '/' for possible redirect
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113 */
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114
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115 last = ngx_http_map_uri_to_path(r, &path, 0);
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116 if (last == NULL) {
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117 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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118 }
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119
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120 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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121 "http filename: \"%s\"", path.data);
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122
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112
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123 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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124 if (cln == NULL) {
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125 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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126 }
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127
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128 fd = ngx_open_file(path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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129
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130 if (fd == NGX_INVALID_FILE) {
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131 err = ngx_errno;
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132
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133 if (err == NGX_ENOENT
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134 || err == NGX_ENOTDIR
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135 || err == NGX_ENAMETOOLONG)
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136 {
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137 level = NGX_LOG_ERR;
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138 rc = NGX_HTTP_NOT_FOUND;
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139
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140 } else if (err == NGX_EACCES) {
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141 level = NGX_LOG_ERR;
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142 rc = NGX_HTTP_FORBIDDEN;
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143
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144 } else {
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145 level = NGX_LOG_CRIT;
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146 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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147 }
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148
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149 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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150
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151 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
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152 ngx_log_error(level, log, err,
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153 ngx_open_file_n " \"%s\" failed", path.data);
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76
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154 }
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155
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156 return rc;
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157 }
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158
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159 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
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160
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161 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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162 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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163 ngx_fd_info_n " \"%s\" failed", path.data);
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164
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165 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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166 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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167 ngx_close_file_n " \"%s\" failed", path.data);
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168 }
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169
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170 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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171 }
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172
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173 if (ngx_is_dir(&fi)) {
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174
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175 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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176
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177 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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178 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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179 ngx_close_file_n " \"%s\" failed", path.data);
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180 }
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181
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182 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
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183 if (r->headers_out.location == NULL) {
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184 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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185 }
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186
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187 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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188
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189 if (!clcf->alias && clcf->root_lengths == NULL) {
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190 location = path.data + clcf->root.len;
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191
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192 } else {
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193 location = ngx_palloc(r->pool, r->uri.len + 1);
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194 if (location == NULL) {
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195 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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196 }
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197
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198 last = ngx_copy(location, r->uri.data, r->uri.len);
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199 }
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200
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201 *last = '/';
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202
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203 /*
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204 * we do not need to set the r->headers_out.location->hash and
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205 * r->headers_out.location->key fields
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206 */
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207
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208 r->headers_out.location->value.len = r->uri.len + 1;
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209 r->headers_out.location->value.data = location;
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210
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211 return NGX_HTTP_MOVED_PERMANENTLY;
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212 }
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213
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214 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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215
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216 if (!ngx_is_file(&fi)) {
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217 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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218 "\"%s\" is not a regular file", path.data);
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219
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220 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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221 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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222 ngx_close_file_n " \"%s\" failed", path.data);
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223 }
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224
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225 return NGX_HTTP_NOT_FOUND;
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226 }
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227
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228 #endif
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229
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230 log->action = "sending response to client";
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231
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232 cln->handler = ngx_pool_cleanup_file;
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233 clnf = cln->data;
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234
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235 clnf->fd = fd;
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236 clnf->name = path.data;
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237 clnf->log = r->pool->log;
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238
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239 r->headers_out.status = NGX_HTTP_OK;
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240 r->headers_out.content_length_n = ngx_file_size(&fi);
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241 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
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242
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243 if (ngx_http_set_content_type(r) != NGX_OK) {
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244 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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245 }
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246
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146
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247 if (r != r->main && ngx_file_size(&fi) == 0) {
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248 return ngx_http_send_header(r);
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249 }
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250
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251 r->allow_ranges = 1;
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252
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126
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253 /* we need to allocate all before the header would be sent */
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254
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255 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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256 if (b == NULL) {
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257 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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258 }
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259
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260 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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261 if (b->file == NULL) {
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262 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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263 }
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264
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265 rc = ngx_http_send_header(r);
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266
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267 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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268 return rc;
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269 }
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270
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271 b->file_pos = 0;
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272 b->file_last = ngx_file_size(&fi);
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273
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274 b->in_file = b->file_last ? 1: 0;
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275 b->last_buf = (r == r->main) ? 1: 0;
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276 b->last_in_chain = 1;
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277
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278 b->file->fd = fd;
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279 b->file->name = path;
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280 b->file->log = log;
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281
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282 out.buf = b;
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283 out.next = NULL;
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284
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285 return ngx_http_output_filter(r, &out);
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286 }
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287
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288
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289 static void *
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290 ngx_http_static_create_loc_conf(ngx_conf_t *cf)
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291 {
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292 ngx_http_static_loc_conf_t *conf;
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293
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294 conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t));
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295 if (conf == NULL) {
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296 return NGX_CONF_ERROR;
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297 }
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298
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299 conf->redirect_cache = NULL;
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300
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301 return conf;
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302 }
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303
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304
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305 static char *
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306 ngx_http_static_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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307 {
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308 ngx_http_static_loc_conf_t *prev = parent;
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309 ngx_http_static_loc_conf_t *conf = child;
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310
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311 if (conf->redirect_cache == NULL) {
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312 conf->redirect_cache = prev->redirect_cache;
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313 }
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314
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315 return NGX_CONF_OK;
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316 }
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317
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318
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319 static ngx_int_t
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320 ngx_http_static_init(ngx_cycle_t *cycle)
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321 {
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322 ngx_http_handler_pt *h;
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323 ngx_http_core_main_conf_t *cmcf;
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324
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325 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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326
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327 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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328 if (h == NULL) {
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329 return NGX_ERROR;
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330 }
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331
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332 *h = ngx_http_static_handler;
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333
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334 return NGX_OK;
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335 }
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