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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_array_t indices;
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14 size_t max_index_len;
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15 ngx_http_cache_hash_t *index_cache;
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16 } ngx_http_index_loc_conf_t;
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17
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18
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19 typedef struct {
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20 ngx_uint_t index;
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21 u_char *last;
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22 ngx_str_t path;
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23 ngx_str_t redirect;
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24 ngx_http_cache_entry_t *cache;
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25 ngx_uint_t tested; /* unsigned tested:1 */
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26 } ngx_http_index_ctx_t;
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27
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28
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29 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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30
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31
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32 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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33 ngx_http_index_ctx_t *ctx);
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34 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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35 ngx_http_index_ctx_t *ctx, ngx_err_t err);
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36
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37 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle);
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38 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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39 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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40 void *parent, void *child);
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41 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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42 void *conf);
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43
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44
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45 static ngx_command_t ngx_http_index_commands[] = {
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46
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47 { ngx_string("index"),
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48 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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49 ngx_http_index_set_index,
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50 NGX_HTTP_LOC_CONF_OFFSET,
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51 0,
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52 NULL },
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53
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54 #if (NGX_HTTP_CACHE)
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55
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56 { ngx_string("index_cache"),
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57 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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58 ngx_http_set_cache_slot,
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59 NGX_HTTP_LOC_CONF_OFFSET,
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60 offsetof(ngx_http_index_loc_conf_t, index_cache),
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61 NULL },
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62
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63 #endif
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64
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65 ngx_null_command
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66 };
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67
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68
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69 ngx_http_module_t ngx_http_index_module_ctx = {
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70 NULL, /* pre conf */
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71
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72 NULL, /* create main configuration */
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73 NULL, /* init main configuration */
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74
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75 NULL, /* create server configuration */
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76 NULL, /* merge server configuration */
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77
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78 ngx_http_index_create_loc_conf, /* create location configration */
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79 ngx_http_index_merge_loc_conf /* merge location configration */
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80 };
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81
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82
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83 ngx_module_t ngx_http_index_module = {
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84 NGX_MODULE,
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85 &ngx_http_index_module_ctx, /* module context */
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86 ngx_http_index_commands, /* module directives */
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87 NGX_HTTP_MODULE, /* module type */
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88 ngx_http_index_init, /* init module */
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89 NULL /* init process */
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90 };
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91
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92
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93 /*
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94 * Try to open the first index file before the test of the directory existence
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95 * because the valid requests should be many more than invalid ones.
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96 * If open() would fail, then stat() should be more quickly because some data
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97 * is already cached in the kernel.
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98 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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99 * Unix has ENOTDIR error, although it less helpfull - it points only
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100 * that path contains the usual file in place of the directory.
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101 */
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102
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103 static ngx_int_t ngx_http_index_handler(ngx_http_request_t *r)
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104 {
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105 u_char *name;
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106 ngx_fd_t fd;
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107 ngx_int_t rc;
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108 ngx_str_t *index;
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109 ngx_err_t err;
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110 ngx_log_t *log;
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111 ngx_http_index_ctx_t *ctx;
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112 ngx_http_core_loc_conf_t *clcf;
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113 ngx_http_index_loc_conf_t *ilcf;
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114 #if (NGX_HTTP_CACHE0)
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115 /* crc must be in ctx !! */
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116 uint32_t crc;
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117 #endif
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118
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119 if (r->uri.data[r->uri.len - 1] != '/') {
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120 return NGX_DECLINED;
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121 }
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122
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123 /* TODO: Win32 */
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124 if (r->zero_in_uri) {
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125 return NGX_DECLINED;
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126 }
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127
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128 log = r->connection->log;
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129
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130 /*
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131 * we use context because the handler supports an async file opening
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132 * and thus can be called several times
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133 */
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134
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135 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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136 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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137
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138 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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139 if (ctx == NULL) {
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140
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141 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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142 if (ctx == NULL) {
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143 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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144 }
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145
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146 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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147
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148 #if (NGX_HTTP_CACHE)
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149
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150 if (ilcf->index_cache) {
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151 ctx->cache = ngx_http_cache_get(ilcf->index_cache, NULL,
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152 &r->uri, &crc);
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153
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154 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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155 "http index cache get: %p", ctx->cache);
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156
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157 if (ctx->cache && !ctx->cache->expired) {
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158
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159 ctx->cache->accessed = ngx_cached_time;
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160
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161 ctx->redirect.len = ctx->cache->data.value.len;
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162 ctx->redirect.data = ngx_palloc(r->pool, ctx->redirect.len + 1);
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163 if (ctx->redirect.data == NULL) {
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164 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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165 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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166 }
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167
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168 ngx_memcpy(ctx->redirect.data, ctx->cache->data.value.data,
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169 ctx->redirect.len + 1);
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170 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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171
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172 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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173 }
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174 }
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175
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176 #endif
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177
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178 #if 0
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179 ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len
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180 + ilcf->max_index_len
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181 - clcf->alias * clcf->name.len);
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182 if (ctx->path.data == NULL) {
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183 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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184 }
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185
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186 ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data,
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187 clcf->root.len);
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188 #endif
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189
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190 if (clcf->alias) {
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191 ctx->path.data = ngx_palloc(r->pool, clcf->root.len
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192 + r->uri.len + 1 - clcf->name.len
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193 + ilcf->max_index_len);
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194 if (ctx->path.data == 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 ctx->redirect.data = ngx_palloc(r->pool, r->uri.len
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199 + ilcf->max_index_len);
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200 if (ctx->redirect.data == NULL) {
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201 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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202 }
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203
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204 ngx_memcpy(ctx->path.data, clcf->root.data, clcf->root.len);
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205
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206 ctx->last = ngx_cpystrn(ctx->path.data + clcf->root.len,
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207 r->uri.data + clcf->name.len,
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208 r->uri.len + 1 - clcf->name.len);
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209
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210 #if 0
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211 /*
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212 * aliases usually have trailling "/",
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213 * set it in the start of the possible redirect
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214 */
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215
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216 if (*ctx->redirect.data != '/') {
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217 ctx->redirect.data--;
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218 }
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219 #endif
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220
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221 } else {
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222 ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len
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223 + ilcf->max_index_len);
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224 if (ctx->path.data == NULL) {
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225 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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226 }
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227
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228 ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data,
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229 clcf->root.len);
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230
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231 ctx->last = ngx_cpystrn(ctx->redirect.data, r->uri.data,
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232 r->uri.len + 1);
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233 }
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234 }
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235
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236 ctx->path.len = ctx->last - ctx->path.data;
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237
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238 index = ilcf->indices.elts;
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239 for (/* void */; ctx->index < ilcf->indices.nelts; ctx->index++) {
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240
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241 if (index[ctx->index].data[0] == '/') {
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242 name = index[ctx->index].data;
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243
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244 } else {
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245 ngx_memcpy(ctx->last, index[ctx->index].data,
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246 index[ctx->index].len + 1);
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247 name = ctx->path.data;
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248 }
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249
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250 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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251 "open index \"%s\"", name);
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252
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253 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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254
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255 if (fd == (ngx_fd_t) NGX_AGAIN) {
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256 return NGX_AGAIN;
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257 }
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258
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259 if (fd == NGX_INVALID_FILE) {
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260 err = ngx_errno;
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261
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262 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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263 ngx_open_file_n " \"%s\" failed", name);
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264
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265 if (err == NGX_ENOTDIR) {
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266 return ngx_http_index_error(r, ctx, err);
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267
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268 } else if (err == NGX_EACCES) {
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269 return ngx_http_index_error(r, ctx, err);
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270 }
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271
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272 if (!ctx->tested) {
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273 rc = ngx_http_index_test_dir(r, ctx);
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274
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275 if (rc != NGX_OK) {
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276 return rc;
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277 }
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278
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279 ctx->tested = 1;
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280 }
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281
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282 if (err == NGX_ENOENT) {
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283 continue;
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284 }
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285
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286 ngx_log_error(NGX_LOG_ERR, log, err,
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287 ngx_open_file_n " \"%s\" failed", name);
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288
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289 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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290 }
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291
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292
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293 /* STUB: open file cache */
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294
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295 r->file.name.data = name;
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296 r->file.fd = fd;
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297
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298 if (index[ctx->index].data[0] == '/') {
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299 r->file.name.len = index[ctx->index].len;
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300 ctx->redirect.len = index[ctx->index].len;
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301 ctx->redirect.data = index[ctx->index].data;
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302
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303 } else {
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304 if (clcf->alias) {
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305 name = ngx_cpymem(ctx->redirect.data, r->uri.data, r->uri.len);
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306 ngx_memcpy(name, index[ctx->index].data,
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307 index[ctx->index].len + 1);
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308 }
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309
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310 ctx->redirect.len = r->uri.len + index[ctx->index].len;
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311 r->file.name.len = clcf->root.len + r->uri.len
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312 - clcf->alias * clcf->name.len
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313 + index[ctx->index].len;
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314 }
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315
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316 /**/
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317
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318
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319 #if (NGX_HTTP_CACHE)
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320
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321 if (ilcf->index_cache) {
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322
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323 if (ctx->cache) {
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324 if (ctx->redirect.len == ctx->cache->data.value.len
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325 && ngx_memcmp(ctx->cache->data.value.data,
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326 ctx->redirect.data, ctx->redirect.len) == 0)
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327 {
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328 ctx->cache->accessed = ngx_cached_time;
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329 ctx->cache->updated = ngx_cached_time;
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330 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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331
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332 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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333 }
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334 }
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335
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336 ctx->redirect.len++;
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337 ctx->cache = ngx_http_cache_alloc(ilcf->index_cache, ctx->cache,
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338 NULL, &r->uri, crc,
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339 &ctx->redirect, log);
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340 ctx->redirect.len--;
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341
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342 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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343 "http index cache alloc: %p", ctx->cache);
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344
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345 if (ctx->cache) {
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346 ctx->cache->fd = NGX_INVALID_FILE;
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347 ctx->cache->accessed = ngx_cached_time;
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348 ctx->cache->last_modified = 0;
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349 ctx->cache->updated = ngx_cached_time;
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350 ctx->cache->memory = 1;
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351 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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352 }
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353 }
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354
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355 #endif
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356
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357 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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358 }
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359
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360 return NGX_DECLINED;
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361 }
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362
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363
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364 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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365 ngx_http_index_ctx_t *ctx)
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366 {
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367 ngx_err_t err;
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368
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369 ctx->path.data[ctx->path.len - 1] = '\0';
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370 ctx->path.data[ctx->path.len] = '\0';
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371
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372 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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373 "http check dir: \"%s\"", ctx->path.data);
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374
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375 if (ngx_file_info(ctx->path.data, &r->file.info) == -1) {
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376
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377 err = ngx_errno;
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378
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379 if (err == NGX_ENOENT) {
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380 ctx->path.data[ctx->path.len - 1] = '/';
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381 return ngx_http_index_error(r, ctx, err);
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382 }
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383
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384 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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385 ngx_file_info_n " \"%s\" failed", ctx->path.data);
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386
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387 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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388 }
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389
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390 ctx->path.data[ctx->path.len - 1] = '/';
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391
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392 if (ngx_is_dir(&r->file.info)) {
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393 return NGX_OK;
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394 }
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395
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396 /* THINK: not reached ??? */
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397 return ngx_http_index_error(r, ctx, 0);
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398 }
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399
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400
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401 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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402 ngx_http_index_ctx_t *ctx, ngx_err_t err)
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403 {
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404 if (err == NGX_EACCES) {
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405 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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406 "\"%s\" is forbidden", ctx->path.data);
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407
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408 return NGX_HTTP_FORBIDDEN;
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409 }
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410
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411 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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412 "\"%s\" is not found", ctx->path.data);
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413 return NGX_HTTP_NOT_FOUND;
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414 }
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415
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416
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417 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle)
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418 {
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419 ngx_http_handler_pt *h;
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420 ngx_http_core_main_conf_t *cmcf;
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421
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422 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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423
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424 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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425 if (h == NULL) {
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426 return NGX_ERROR;
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427 }
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428
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429 *h = ngx_http_index_handler;
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430
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431 return NGX_OK;
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432 }
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433
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434
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435 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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436 {
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437 ngx_http_index_loc_conf_t *conf;
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438
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439 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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440 if (conf == NULL) {
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441 return NGX_CONF_ERROR;
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442 }
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443
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444 if (ngx_array_init(&conf->indices, cf->pool, 2, sizeof(ngx_str_t))
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445 == NGX_ERROR)
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446 {
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447 return NGX_CONF_ERROR;
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448 }
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449
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450 conf->max_index_len = 0;
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451
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452 conf->index_cache = NULL;
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453
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454 return conf;
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455 }
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456
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457
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458 /* TODO: remove duplicate indices */
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459
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|
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460 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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|
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461 void *parent, void *child)
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462 {
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463 ngx_http_index_loc_conf_t *prev = parent;
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464 ngx_http_index_loc_conf_t *conf = child;
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465
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466 ngx_str_t *index;
|
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467
|
|
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468 if (conf->max_index_len == 0) {
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|
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469 if (prev->max_index_len != 0) {
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|
|
470 ngx_memcpy(conf, prev, sizeof(ngx_http_index_loc_conf_t));
|
|
|
471 return NGX_CONF_OK;
|
|
|
472 }
|
|
|
473
|
|
|
474 index = ngx_array_push(&conf->indices);
|
|
|
475 if (index == NULL) {
|
|
|
476 return NGX_CONF_ERROR;
|
|
|
477 }
|
|
|
478
|
|
|
479 index->len = sizeof(NGX_HTTP_DEFAULT_INDEX) - 1;
|
|
|
480 index->data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
|
|
|
481 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
482
|
|
|
483 return NGX_CONF_OK;
|
|
|
484 }
|
|
|
485
|
|
|
486 #if 0
|
|
|
487
|
|
|
488 if (prev->max_index_len != 0) {
|
|
|
489
|
|
|
490 prev_index = prev->indices.elts;
|
|
|
491 for (i = 0; i < prev->indices.nelts; i++) {
|
|
|
492 index = ngx_array_push(&conf->indices);
|
|
|
493 if (index == NULL) {
|
|
|
494 return NGX_CONF_ERROR;
|
|
|
495 }
|
|
|
496
|
|
|
497 index->len = prev_index[i].len;
|
|
|
498 index->data = prev_index[i].data;
|
|
|
499 }
|
|
|
500 }
|
|
|
501
|
|
|
502 if (conf->max_index_len < prev->max_index_len) {
|
|
|
503 conf->max_index_len = prev->max_index_len;
|
|
|
504 }
|
|
|
505
|
|
|
506 #endif
|
|
|
507
|
|
|
508 if (conf->index_cache == NULL) {
|
|
|
509 conf->index_cache = prev->index_cache;
|
|
|
510 }
|
|
|
511
|
|
|
512 return NGX_CONF_OK;
|
|
|
513 }
|
|
|
514
|
|
|
515
|
|
|
516 /* TODO: warn about duplicate indices */
|
|
|
517
|
|
|
518 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
519 void *conf)
|
|
|
520 {
|
|
|
521 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
522
|
|
|
523 ngx_uint_t i;
|
|
|
524 ngx_str_t *index, *value;
|
|
|
525
|
|
|
526 value = cf->args->elts;
|
|
|
527
|
|
|
528 if (value[1].data[0] == '/' && ilcf->indices.nelts == 0) {
|
|
|
529 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
530 "first index \"%V\" in \"%V\" directive "
|
|
|
531 "must not be absolute",
|
|
|
532 &value[1], &cmd->name);
|
|
|
533 return NGX_CONF_ERROR;
|
|
|
534 }
|
|
|
535
|
|
|
536 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
537 if (value[i].len == 0) {
|
|
|
538 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
539 "index \"%V\" in \"%V\" directive is invalid",
|
|
|
540 &value[1], &cmd->name);
|
|
|
541 return NGX_CONF_ERROR;
|
|
|
542 }
|
|
|
543
|
|
|
544 index = ngx_array_push(&ilcf->indices);
|
|
|
545 if (index == NULL) {
|
|
|
546 return NGX_CONF_ERROR;
|
|
|
547 }
|
|
|
548
|
|
|
549 index->len = value[i].len;
|
|
|
550 index->data = value[i].data;
|
|
|
551
|
|
|
552 if (ilcf->max_index_len < index->len + 1) {
|
|
|
553 ilcf->max_index_len = index->len + 1;
|
|
|
554 }
|
|
|
555 }
|
|
|
556
|
|
|
557 return NGX_CONF_OK;
|
|
|
558 }
|
