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50
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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13 ngx_http_cache_hash_t *redirect_cache;
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14 } ngx_http_static_loc_conf_t;
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15
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16
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17 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r);
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18 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf);
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19 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
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58
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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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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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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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61 ngx_http_static_init, /* init module */
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62 NULL /* init process */
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63 };
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64
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65
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58
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66 static ngx_int_t
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67 ngx_http_static_handler(ngx_http_request_t *r)
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68 {
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69 u_char *last;
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70 ngx_fd_t fd;
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71 ngx_int_t rc;
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72 ngx_uint_t level;
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73 ngx_str_t name, location;
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74 ngx_err_t err;
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75 ngx_log_t *log;
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76 ngx_buf_t *b;
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77 ngx_chain_t out;
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78 ngx_file_info_t fi;
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79 ngx_pool_cleanup_file_t *cln;
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80 ngx_http_core_loc_conf_t *clcf;
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81
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82 if (r->uri.data[r->uri.len - 1] == '/') {
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83 return NGX_DECLINED;
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84 }
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85
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86 /* TODO: Win32 */
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87 if (r->zero_in_uri) {
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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 log = r->connection->log;
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102
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103 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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104
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105 /*
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106 * make a file name, reserve 2 bytes for a trailing '/'
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107 * in a possible redirect and for the last '\0'
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108 */
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109
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58
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110 if (!clcf->alias) {
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111 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
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112 if (name.data == NULL) {
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113 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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114 }
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115
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116 location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
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117 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
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118
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119 name.len = last - name.data;
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120 location.len = last - location.data + 1;
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121
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122 } else {
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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 location.len = last - location.data + 1;
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143 }
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144
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145 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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146 "http filename: \"%s\"", name.data);
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147
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148 /* open file */
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149
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150 #if (NGX_WIN9X)
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151
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152 if (ngx_win32_version < NGX_WIN_NT) {
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153
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154 /*
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155 * there is no way to open a file or a directory in Win9X with
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156 * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
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157 * so we need to check its type before the opening
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158 */
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159
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160 if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
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161 err = ngx_errno;
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162 ngx_log_error(NGX_LOG_ERR, log, err,
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163 ngx_file_info_n " \"%s\" failed", name.data);
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164
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165 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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166 return NGX_HTTP_NOT_FOUND;
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167
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168 } else if (err == NGX_EACCES) {
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169 return NGX_HTTP_FORBIDDEN;
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170
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171 } else {
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172 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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173 }
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174 }
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175
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176 if (ngx_is_dir(&fi)) {
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177 r->headers_out.location = ngx_http_add_header(&r->headers_out,
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178 ngx_http_headers_out);
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179 if (r->headers_out.location == NULL) {
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180 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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181 }
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182
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183 *last++ = '/';
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184 *last = '\0';
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185 r->headers_out.location->value.len = last - location;
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186 r->headers_out.location->value.data = location;
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187
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188 return NGX_HTTP_MOVED_PERMANENTLY;
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189 }
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190 }
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191
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192 #endif
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193
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194
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195 fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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196
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197 if (fd == NGX_INVALID_FILE) {
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198 err = ngx_errno;
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199
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200 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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201 level = NGX_LOG_ERR;
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202 rc = NGX_HTTP_NOT_FOUND;
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203
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204 } else if (err == NGX_EACCES) {
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205 level = NGX_LOG_ERR;
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206 rc = NGX_HTTP_FORBIDDEN;
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207
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208 } else {
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209 level = NGX_LOG_CRIT;
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210 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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211 }
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212
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76
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213 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
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214 ngx_log_error(level, log, err,
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215 ngx_open_file_n " \"%s\" failed", name.data);
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216 }
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217
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218 return rc;
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219 }
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220
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221 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
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222
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223 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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224 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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225 ngx_fd_info_n " \"%s\" failed", name.data);
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226
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227 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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228 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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229 ngx_close_file_n " \"%s\" failed", name.data);
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230 }
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231
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232 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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233 }
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234
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235 if (ngx_is_dir(&fi)) {
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236
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237 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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238
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239 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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240 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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241 ngx_close_file_n " \"%s\" failed", name.data);
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242 }
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243
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244 *last++ = '/';
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245 *last = '\0';
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246
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247 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
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248 if (r->headers_out.location == NULL) {
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249 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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250 }
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251
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58
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252 /*
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253 * we do not need to set the r->headers_out.location->hash and
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254 * r->headers_out.location->key fields
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255 */
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256
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257 r->headers_out.location->value = location;
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258
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259 return NGX_HTTP_MOVED_PERMANENTLY;
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260 }
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261
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262 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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263
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264 if (!ngx_is_file(&fi)) {
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265 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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266 "\"%s\" is not a regular file", name.data);
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267
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268 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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269 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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270 ngx_close_file_n " \"%s\" failed", name.data);
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271 }
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272
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273 return NGX_HTTP_NOT_FOUND;
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274 }
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275
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276 #endif
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277
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278 log->action = "sending response to client";
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279
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280 cln = ngx_palloc(r->pool, sizeof(ngx_pool_cleanup_file_t));
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281 if (cln == NULL) {
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282 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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283 }
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284
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285 cln->fd = fd;
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286 cln->name = name.data;
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287 cln->log = r->pool->log;
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288
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289 if (ngx_pool_cleanup_add(r->pool, ngx_pool_cleanup_file, cln) == NULL) {
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290 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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291 }
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292
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293 r->headers_out.status = NGX_HTTP_OK;
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294 r->headers_out.content_length_n = ngx_file_size(&fi);
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295 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
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296
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297 if (r->headers_out.content_length_n == 0) {
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298 r->header_only = 1;
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299 }
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300
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301 if (ngx_http_set_content_type(r) != NGX_OK) {
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302 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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303 }
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304
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305 #if (NGX_SUPPRESS_WARN)
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306 b = NULL;
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307 #endif
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308
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309 if (!r->header_only) {
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310 /* we need to allocate all before the header would be sent */
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311
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312 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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313 if (b == NULL) {
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314 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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315 }
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316
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317 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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318 if (b->file == NULL) {
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319 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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320 }
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321
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322 r->filter_allow_ranges = 1;
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323 }
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324
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325 rc = ngx_http_send_header(r);
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326
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327 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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328 return rc;
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329 }
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330
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331 b->in_file = 1;
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332
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333 if (r->main == NULL) {
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334 b->last_buf = 1;
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335 }
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336
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337 b->last_in_chain = 1;
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338
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339 b->file_pos = 0;
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340 b->file_last = ngx_file_size(&fi);
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341
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342 b->file->fd = fd;
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343 b->file->name = name;
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344 b->file->log = log;
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345
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346 out.buf = b;
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347 out.next = NULL;
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348
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349 return ngx_http_output_filter(r, &out);
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350 }
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351
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352
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58
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353 static void *
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354 ngx_http_static_create_loc_conf(ngx_conf_t *cf)
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50
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355 {
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356 ngx_http_static_loc_conf_t *conf;
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357
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358 conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t));
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359 if (conf == NULL) {
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360 return NGX_CONF_ERROR;
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361 }
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362
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363 conf->redirect_cache = NULL;
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364
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365 return conf;
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366 }
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367
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368
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58
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369 static char *
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370 ngx_http_static_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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50
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371 {
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372 ngx_http_static_loc_conf_t *prev = parent;
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373 ngx_http_static_loc_conf_t *conf = child;
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374
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375 if (conf->redirect_cache == NULL) {
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376 conf->redirect_cache = prev->redirect_cache;
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377 }
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378
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379 return NGX_CONF_OK;
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380 }
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381
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382
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58
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383 static ngx_int_t
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384 ngx_http_static_init(ngx_cycle_t *cycle)
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50
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385 {
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386 ngx_http_handler_pt *h;
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387 ngx_http_core_main_conf_t *cmcf;
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388
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389 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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390
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391 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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392 if (h == NULL) {
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393 return NGX_ERROR;
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394 }
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395
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396 *h = ngx_http_static_handler;
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397
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398 return NGX_OK;
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399 }
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