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358
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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_flag_t enable;
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14 } ngx_http_gzip_static_conf_t;
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15
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16
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17 static ngx_int_t ngx_http_gzip_static_handler(ngx_http_request_t *r);
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18 static void *ngx_http_gzip_static_create_conf(ngx_conf_t *cf);
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19 static char *ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent,
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20 void *child);
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21 static ngx_int_t ngx_http_gzip_static_init(ngx_conf_t *cf);
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22
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23
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24 static ngx_command_t ngx_http_gzip_static_commands[] = {
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25
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26 { ngx_string("gzip_static"),
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27 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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28 ngx_conf_set_flag_slot,
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29 NGX_HTTP_LOC_CONF_OFFSET,
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30 offsetof(ngx_http_gzip_static_conf_t, enable),
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31 NULL },
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32
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33 ngx_null_command
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34 };
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35
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36
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37 ngx_http_module_t ngx_http_gzip_static_module_ctx = {
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38 NULL, /* preconfiguration */
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39 ngx_http_gzip_static_init, /* postconfiguration */
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40
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41 NULL, /* create main configuration */
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42 NULL, /* init main configuration */
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43
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44 NULL, /* create server configuration */
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45 NULL, /* merge server configuration */
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46
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47 ngx_http_gzip_static_create_conf, /* create location configuration */
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48 ngx_http_gzip_static_merge_conf /* merge location configuration */
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49 };
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50
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51
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52 ngx_module_t ngx_http_gzip_static_module = {
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53 NGX_MODULE_V1,
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54 &ngx_http_gzip_static_module_ctx, /* module context */
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55 ngx_http_gzip_static_commands, /* module directives */
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56 NGX_HTTP_MODULE, /* module type */
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57 NULL, /* init master */
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58 NULL, /* init module */
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59 NULL, /* init process */
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60 NULL, /* init thread */
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61 NULL, /* exit thread */
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62 NULL, /* exit process */
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63 NULL, /* exit master */
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64 NGX_MODULE_V1_PADDING
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65 };
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66
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67
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68 static ngx_int_t
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69 ngx_http_gzip_static_handler(ngx_http_request_t *r)
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70 {
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71 u_char *p;
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72 size_t root;
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73 ngx_str_t path;
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74 ngx_int_t rc;
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75 ngx_uint_t level;
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76 ngx_log_t *log;
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77 ngx_buf_t *b;
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78 ngx_chain_t out;
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79 ngx_table_elt_t *h;
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80 ngx_open_file_info_t of;
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81 ngx_http_core_loc_conf_t *clcf;
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82 ngx_http_gzip_static_conf_t *gzcf;
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83
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84 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
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85 return NGX_HTTP_NOT_ALLOWED;
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86 }
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87
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88 if (r->uri.data[r->uri.len - 1] == '/') {
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89 return NGX_DECLINED;
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90 }
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91
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92 /* TODO: Win32 */
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93 if (r->zero_in_uri) {
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94 return NGX_DECLINED;
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95 }
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96
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97 gzcf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_static_module);
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98
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99 if (!gzcf->enable || ngx_http_gzip_ok(r) != NGX_OK) {
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100 return NGX_DECLINED;
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101 }
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102
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103 log = r->connection->log;
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104
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105 p = ngx_http_map_uri_to_path(r, &path, &root, sizeof(".gz") - 1);
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106 if (p == NULL) {
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107 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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108 }
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109
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110 *p++ = '.';
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111 *p++ = 'g';
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112 *p++ = 'z';
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113 *p = '\0';
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114
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115 path.len = p - path.data;
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116
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117 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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118 "http filename: \"%s\"", path.data);
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119
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120 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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121
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122 of.test_dir = 0;
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123 of.valid = clcf->open_file_cache_valid;
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124 of.min_uses = clcf->open_file_cache_min_uses;
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125 of.errors = clcf->open_file_cache_errors;
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126 of.events = clcf->open_file_cache_events;
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127
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128 rc = ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool);
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129
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130 if (rc == NGX_ERROR) {
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131
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132 switch (of.err) {
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133
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134 case 0:
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135 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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136
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137 case NGX_ENOENT:
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138 case NGX_ENOTDIR:
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139 case NGX_ENAMETOOLONG:
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140
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141 return NGX_DECLINED;
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142
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143 case NGX_EACCES:
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144
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145 level = NGX_LOG_ERR;
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146 rc = NGX_DECLINED;
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147 break;
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148
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149 default:
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150
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151 level = NGX_LOG_CRIT;
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152 rc = NGX_DECLINED;
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153 break;
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154 }
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155
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156 ngx_log_error(level, log, of.err,
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157 ngx_open_file_n " \"%s\" failed", path.data);
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158
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159 return rc;
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160 }
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161
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162 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd);
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163
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164 if (of.is_dir) {
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165 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
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166 return NGX_DECLINED;
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167 }
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168
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169 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
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170
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171 if (!of.is_file) {
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172 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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173 "\"%s\" is not a regular file", path.data);
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174
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175 return NGX_HTTP_NOT_FOUND;
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176 }
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177
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178 #endif
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179
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180 rc = ngx_http_discard_request_body(r);
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181
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182 if (rc != NGX_OK) {
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183 return rc;
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184 }
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185
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186 log->action = "sending response to client";
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187
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188 r->headers_out.status = NGX_HTTP_OK;
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189 r->headers_out.content_length_n = of.size;
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190 r->headers_out.last_modified_time = of.mtime;
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191
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192 if (ngx_http_set_content_type(r) != NGX_OK) {
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193 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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194 }
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195
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196 h = ngx_list_push(&r->headers_out.headers);
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197 if (h == NULL) {
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198 return NGX_ERROR;
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199 }
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200
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201 h->hash = 1;
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202 h->key.len = sizeof("Content-Encoding") - 1;
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203 h->key.data = (u_char *) "Content-Encoding";
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204 h->value.len = sizeof("gzip") - 1;
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205 h->value.data = (u_char *) "gzip";
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206
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207 r->headers_out.content_encoding = h;
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208
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209 if (clcf->gzip_vary) {
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210 h = ngx_list_push(&r->headers_out.headers);
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211 if (h == NULL) {
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212 return NGX_ERROR;
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213 }
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214
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215 h->hash = 1;
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216 h->key.len = sizeof("Vary") - 1;
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217 h->key.data = (u_char *) "Vary";
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218 h->value.len = sizeof("Accept-Encoding") - 1;
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219 h->value.data = (u_char *) "Accept-Encoding";
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220 }
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221
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222 /* we need to allocate all before the header would be sent */
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223
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224 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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225 if (b == NULL) {
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226 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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227 }
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228
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229 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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230 if (b->file == NULL) {
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231 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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232 }
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233
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234 rc = ngx_http_send_header(r);
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235
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236 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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237 return rc;
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238 }
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239
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240 b->file_pos = 0;
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241 b->file_last = of.size;
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242
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243 b->in_file = b->file_last ? 1 : 0;
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244 b->last_buf = 1;
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245 b->last_in_chain = 1;
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246
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247 b->file->fd = of.fd;
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248 b->file->name = path;
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249 b->file->log = log;
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250
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251 out.buf = b;
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252 out.next = NULL;
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253
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254 return ngx_http_output_filter(r, &out);
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255 }
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256
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257
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258 static void *
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259 ngx_http_gzip_static_create_conf(ngx_conf_t *cf)
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260 {
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261 ngx_http_gzip_static_conf_t *conf;
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262
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263 conf = ngx_palloc(cf->pool, sizeof(ngx_http_gzip_static_conf_t));
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264 if (conf == NULL) {
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265 return NGX_CONF_ERROR;
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266 }
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267
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268 conf->enable = NGX_CONF_UNSET;
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269
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270 return conf;
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271 }
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272
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273
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274 static char *
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275 ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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276 {
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277 ngx_http_gzip_static_conf_t *prev = parent;
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278 ngx_http_gzip_static_conf_t *conf = child;
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279
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280 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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281
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282 return NGX_CONF_OK;
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283 }
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284
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285
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286 static ngx_int_t
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287 ngx_http_gzip_static_init(ngx_conf_t *cf)
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288 {
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289 ngx_http_handler_pt *h;
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290 ngx_http_core_main_conf_t *cmcf;
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291
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292 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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293
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294 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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295 if (h == NULL) {
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296 return NGX_ERROR;
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297 }
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298
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299 *h = ngx_http_gzip_static_handler;
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300
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301 return NGX_OK;
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302 }
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