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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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58
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13 ngx_str_t name;
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14 ngx_array_t *lengths;
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15 ngx_array_t *values;
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16 } ngx_http_index_t;
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17
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18
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19 typedef struct {
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20 ngx_array_t *indices; /* array of ngx_http_index_t */
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50
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21 size_t max_index_len;
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22 } ngx_http_index_loc_conf_t;
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23
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24
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25 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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26
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27
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28 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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344
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29 ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last);
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30 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r, u_char *file,
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31 ngx_err_t err);
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32
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230
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33 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf);
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50
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34 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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35 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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36 void *parent, void *child);
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50
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37 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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38 void *conf);
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39
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40
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41 static ngx_command_t ngx_http_index_commands[] = {
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42
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43 { ngx_string("index"),
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44 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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45 ngx_http_index_set_index,
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46 NGX_HTTP_LOC_CONF_OFFSET,
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47 0,
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48 NULL },
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49
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50 ngx_null_command
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51 };
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52
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53
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216
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54 static ngx_http_module_t ngx_http_index_module_ctx = {
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58
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55 NULL, /* preconfiguration */
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230
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56 ngx_http_index_init, /* postconfiguration */
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57
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58 NULL, /* create main configuration */
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59 NULL, /* init main configuration */
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60
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61 NULL, /* create server configuration */
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62 NULL, /* merge server configuration */
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63
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64 ngx_http_index_create_loc_conf, /* create location configration */
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65 ngx_http_index_merge_loc_conf /* merge location configration */
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66 };
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67
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68
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69 ngx_module_t ngx_http_index_module = {
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70 NGX_MODULE_V1,
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71 &ngx_http_index_module_ctx, /* module context */
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72 ngx_http_index_commands, /* module directives */
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73 NGX_HTTP_MODULE, /* module type */
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90
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74 NULL, /* init master */
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230
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75 NULL, /* init module */
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90
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76 NULL, /* init process */
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77 NULL, /* init thread */
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78 NULL, /* exit thread */
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79 NULL, /* exit process */
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80 NULL, /* exit master */
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81 NGX_MODULE_V1_PADDING
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50
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82 };
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83
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84
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85 /*
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86 * Try to open the first index file before the test of the directory existence
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87 * because the valid requests should be many more than invalid ones.
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88 * If open() would fail, then stat() should be more quickly because some data
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89 * is already cached in the kernel.
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90 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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91 * Unix has ENOTDIR error, although it less helpfull - it points only
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92 * that path contains the usual file in place of the directory.
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93 */
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94
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58
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95 static ngx_int_t
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96 ngx_http_index_handler(ngx_http_request_t *r)
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97 {
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344
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98 u_char *p, *name;
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99 size_t len, nlen, root, allocated;
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100 ngx_int_t rc;
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332
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101 ngx_str_t path, uri;
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102 ngx_log_t *log;
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344
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103 ngx_uint_t i, dir_tested;
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104 ngx_http_index_t *index;
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332
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105 ngx_open_file_info_t of;
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58
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106 ngx_http_script_code_pt code;
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107 ngx_http_script_engine_t e;
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108 ngx_http_core_loc_conf_t *clcf;
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109 ngx_http_index_loc_conf_t *ilcf;
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110 ngx_http_script_len_code_pt lcode;
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50
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111
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112 if (r->uri.data[r->uri.len - 1] != '/') {
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113 return NGX_DECLINED;
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114 }
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115
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272
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116 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
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117 return NGX_DECLINED;
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118 }
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119
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50
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120 /* TODO: Win32 */
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121 if (r->zero_in_uri) {
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122 return NGX_DECLINED;
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123 }
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124
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125 log = r->connection->log;
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126
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332
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127 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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128 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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129
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344
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130 allocated = 0;
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131 root = 0;
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132 dir_tested = 0;
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133 name = NULL;
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134 path.data = NULL;
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135
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136 index = ilcf->indices->elts;
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344
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137 for (i = 0; i < ilcf->indices->nelts; i++) {
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138
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139 if (index[i].lengths == NULL) {
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140
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141 if (index[i].name.data[0] == '/') {
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142 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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143 }
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144
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145 len = ilcf->max_index_len;
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344
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146 nlen = index[i].name.len;
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147
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58
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148 } else {
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149 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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150
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151 e.ip = index[i].lengths->elts;
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152 e.request = r;
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122
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153 e.flushed = 1;
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154
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112
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155 /* 1 byte for terminating '\0' */
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106
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156
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112
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157 len = 1;
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158
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58
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159 while (*(uintptr_t *) e.ip) {
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160 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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161 len += lcode(&e);
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162 }
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163
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344
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164 nlen = len;
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112
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165
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166 /* 16 bytes are preallocation */
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167
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168 len += 16;
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58
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169 }
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170
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344
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171 if (len > (size_t) (path.data + allocated - name)) {
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106
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172
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173 name = ngx_http_map_uri_to_path(r, &path, &root, len);
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174 if (name == NULL) {
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106
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175 return NGX_ERROR;
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176 }
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106
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177
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178 allocated = path.len;
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179 }
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180
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181 if (index[i].values == NULL) {
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106
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182
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183 /* index[i].name.len includes the terminating '\0' */
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184
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344
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185 ngx_memcpy(name, index[i].name.data, index[i].name.len);
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186
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344
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187 path.len = (name + index[i].name.len - 1) - path.data;
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332
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188
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58
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189 } else {
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190 e.ip = index[i].values->elts;
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191 e.pos = name;
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192
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193 while (*(uintptr_t *) e.ip) {
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194 code = *(ngx_http_script_code_pt *) e.ip;
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195 code((ngx_http_script_engine_t *) &e);
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196 }
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197
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344
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198 if (*name == '/') {
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199 uri.len = nlen - 1;
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200 uri.data = name;
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201 return ngx_http_internal_redirect(r, &uri, &r->args);
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202 }
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203
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332
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204 path.len = e.pos - path.data;
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205
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206 *e.pos++ = '\0';
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207 }
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208
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344
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209 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "open index \"%V\"", &path);
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210
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332
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211 of.test_dir = 0;
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212 of.retest = clcf->open_file_cache_retest;
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213 of.errors = clcf->open_file_cache_errors;
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214 of.events = clcf->open_file_cache_events;
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112
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215
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332
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216 rc = ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool);
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217
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332
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218 if (rc == NGX_ERROR) {
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219
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332
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220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, of.err,
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344
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221 ngx_open_file_n " \"%s\" failed", path.data);
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222
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332
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223 if (of.err == 0) {
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224 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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225 }
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226
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344
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227 if (of.err == NGX_ENOTDIR || of.err == NGX_EACCES) {
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228 return ngx_http_index_error(r, path.data, of.err);
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229 }
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230
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344
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231 if (!dir_tested) {
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232 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1);
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233
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234 if (rc != NGX_OK) {
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235 return rc;
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236 }
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237
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344
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238 dir_tested = 1;
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239 }
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240
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332
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241 if (of.err == NGX_ENOENT) {
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242 continue;
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243 }
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244
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332
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245 ngx_log_error(NGX_LOG_ERR, log, of.err,
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344
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246 ngx_open_file_n " \"%s\" failed", path.data);
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247
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248 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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249 }
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250
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344
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251 uri.len = r->uri.len + nlen - 1;
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106
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252
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253 if (!clcf->alias) {
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344
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254 uri.data = path.data + root;
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106
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255
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256 } else {
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257 uri.data = ngx_palloc(r->pool, uri.len);
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258 if (uri.data == NULL) {
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259 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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260 }
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261
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344
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262 p = ngx_copy(uri.data, r->uri.data, r->uri.len);
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263 ngx_memcpy(p, name, nlen - 1);
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264 }
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265
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106
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266 return ngx_http_internal_redirect(r, &uri, &r->args);
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267 }
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268
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269 return NGX_DECLINED;
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270 }
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271
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272
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58
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273 static ngx_int_t
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332
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274 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
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344
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275 u_char *path, u_char *last)
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58
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276 {
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332
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277 u_char c;
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344
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278 ngx_str_t dir;
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332
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279 ngx_open_file_info_t of;
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280
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344
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281 c = *last;
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346
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282 if (c != '/' || path == last) {
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344
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283 /* "alias" without trailing slash */
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284 c = *(++last);
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285 }
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286 *last = '\0';
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287
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344
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288 dir.len = last - path;
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289 dir.data = path;
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290
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332
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291 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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344
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292 "http index check dir: \"%V\"", &dir);
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293
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332
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294 of.test_dir = 1;
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295 of.retest = clcf->open_file_cache_retest;
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296 of.errors = clcf->open_file_cache_errors;
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297
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344
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298 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool)
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332
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299 != NGX_OK)
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300 {
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301 if (of.err) {
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302
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303 if (of.err == NGX_ENOENT) {
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344
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304 *last = c;
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305 return ngx_http_index_error(r, dir.data, NGX_ENOENT);
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332
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306 }
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307
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308 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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344
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309 ngx_open_file_n " \"%s\" failed", dir.data);
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50
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310 }
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311
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312 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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313 }
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314
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344
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315 *last = c;
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316
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332
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317 if (of.is_dir) {
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318 return NGX_OK;
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319 }
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320
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321 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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344
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322 "\"%s\" is not a directory", dir.data);
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58
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323
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324 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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325 }
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326
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327
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58
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328 static ngx_int_t
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344
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329 ngx_http_index_error(ngx_http_request_t *r, u_char *file, ngx_err_t err)
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50
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330 {
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331 if (err == NGX_EACCES) {
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332 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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344
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333 "\"%s\" is forbidden", file);
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126
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334
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335 return NGX_HTTP_FORBIDDEN;
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336 }
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337
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338 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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344
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339 "\"%s\" is not found", file);
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58
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340
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341 return NGX_HTTP_NOT_FOUND;
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342 }
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343
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344
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58
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345 static void *
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346 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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347 {
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348 ngx_http_index_loc_conf_t *conf;
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349
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350 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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351 if (conf == NULL) {
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352 return NGX_CONF_ERROR;
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353 }
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354
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355 conf->indices = NULL;
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230
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356 conf->max_index_len = 0;
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58
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357
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358 return conf;
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359 }
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360
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361
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362 static char *
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363 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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364 {
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365 ngx_http_index_loc_conf_t *prev = parent;
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366 ngx_http_index_loc_conf_t *conf = child;
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367
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368 ngx_http_index_t *index;
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369
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370 if (conf->indices == NULL) {
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371 conf->indices = prev->indices;
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372 conf->max_index_len = prev->max_index_len;
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373 }
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374
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375 if (conf->indices == NULL) {
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376 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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377 if (conf->indices == NULL) {
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378 return NGX_CONF_ERROR;
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379 }
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380
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381 index = ngx_array_push(conf->indices);
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382 if (index == NULL) {
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383 return NGX_CONF_ERROR;
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384 }
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385
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386 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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387 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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388 index->lengths = NULL;
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|
|
389 index->values = NULL;
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|
|
390
|
|
|
391 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
392
|
|
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393 return NGX_CONF_OK;
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|
|
394 }
|
|
|
395
|
|
|
396 return NGX_CONF_OK;
|
|
|
397 }
|
|
|
398
|
|
|
399
|
|
230
|
400 static ngx_int_t
|
|
|
401 ngx_http_index_init(ngx_conf_t *cf)
|
|
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402 {
|
|
|
403 ngx_http_handler_pt *h;
|
|
|
404 ngx_http_core_main_conf_t *cmcf;
|
|
|
405
|
|
|
406 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
|
407
|
|
|
408 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
409 if (h == NULL) {
|
|
|
410 return NGX_ERROR;
|
|
|
411 }
|
|
|
412
|
|
|
413 *h = ngx_http_index_handler;
|
|
|
414
|
|
|
415 return NGX_OK;
|
|
|
416 }
|
|
|
417
|
|
|
418
|
|
58
|
419 /* TODO: warn about duplicate indices */
|
|
|
420
|
|
|
421 static char *
|
|
|
422 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
423 {
|
|
|
424 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
425
|
|
230
|
426 ngx_str_t *value;
|
|
58
|
427 ngx_uint_t i, n;
|
|
|
428 ngx_http_index_t *index;
|
|
|
429 ngx_http_script_compile_t sc;
|
|
|
430
|
|
|
431 if (ilcf->indices == NULL) {
|
|
|
432 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
433 if (ilcf->indices == NULL) {
|
|
|
434 return NGX_CONF_ERROR;
|
|
|
435 }
|
|
|
436 }
|
|
|
437
|
|
|
438 value = cf->args->elts;
|
|
|
439
|
|
|
440 for (i = 1; i < cf->args->nelts; i++) {
|
|
344
|
441
|
|
58
|
442 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
344
|
443 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
58
|
444 "only the last index in \"index\" directive "
|
|
344
|
445 "should be absolute");
|
|
58
|
446 }
|
|
|
447
|
|
|
448 if (value[i].len == 0) {
|
|
|
449 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
450 "index \"%V\" in \"index\" directive is invalid",
|
|
|
451 &value[1]);
|
|
|
452 return NGX_CONF_ERROR;
|
|
|
453 }
|
|
|
454
|
|
|
455 index = ngx_array_push(ilcf->indices);
|
|
|
456 if (index == NULL) {
|
|
|
457 return NGX_CONF_ERROR;
|
|
|
458 }
|
|
|
459
|
|
|
460 index->name.len = value[i].len;
|
|
|
461 index->name.data = value[i].data;
|
|
|
462 index->lengths = NULL;
|
|
|
463 index->values = NULL;
|
|
|
464
|
|
|
465 n = ngx_http_script_variables_count(&value[i]);
|
|
|
466
|
|
|
467 if (n == 0) {
|
|
230
|
468 if (ilcf->max_index_len < index->name.len) {
|
|
58
|
469 ilcf->max_index_len = index->name.len;
|
|
|
470 }
|
|
|
471
|
|
344
|
472 if (index->name.data[0] == '/') {
|
|
|
473 continue;
|
|
|
474 }
|
|
|
475
|
|
122
|
476 /* include the terminating '\0' to the length to use ngx_copy() */
|
|
106
|
477 index->name.len++;
|
|
|
478
|
|
58
|
479 continue;
|
|
|
480 }
|
|
|
481
|
|
|
482 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
483
|
|
|
484 sc.cf = cf;
|
|
|
485 sc.source = &value[i];
|
|
|
486 sc.lengths = &index->lengths;
|
|
|
487 sc.values = &index->values;
|
|
|
488 sc.variables = n;
|
|
|
489 sc.complete_lengths = 1;
|
|
|
490 sc.complete_values = 1;
|
|
|
491
|
|
|
492 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
493 return NGX_CONF_ERROR;
|
|
|
494 }
|
|
|
495 }
|
|
|
496
|
|
|
497 return NGX_CONF_OK;
|
|
|
498 }
|
