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182
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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 #define NGX_HTTP_DAV_OFF 2
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13
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14 typedef struct {
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15 ngx_uint_t methods;
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186
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16 ngx_flag_t create_full_put_path;
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182
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17 } ngx_http_dav_loc_conf_t;
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18
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19
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20 static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r);
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21 static void ngx_http_dav_put_handler(ngx_http_request_t *r);
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186
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22 static ngx_int_t ngx_http_dav_error(ngx_http_request_t *, ngx_err_t err,
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23 ngx_int_t not_found, char *failed, u_char *path);
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24 static ngx_int_t ngx_http_dav_location(ngx_http_request_t *r, u_char *path);
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182
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25 static void *ngx_http_dav_create_loc_conf(ngx_conf_t *cf);
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26 static char *ngx_http_dav_merge_loc_conf(ngx_conf_t *cf,
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27 void *parent, void *child);
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28 static ngx_int_t ngx_http_dav_init(ngx_cycle_t *cycle);
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29
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30
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31 static ngx_conf_bitmask_t ngx_http_dav_methods_mask[] = {
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32 { ngx_string("off"), NGX_HTTP_DAV_OFF },
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33 { ngx_string("put"), NGX_HTTP_PUT },
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34 { ngx_string("delete"), NGX_HTTP_DELETE },
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186
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35 { ngx_string("mkcol"), NGX_HTTP_MKCOL },
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182
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36 { ngx_null_string, 0 }
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37 };
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38
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39
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40 static ngx_command_t ngx_http_dav_commands[] = {
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41
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42 { ngx_string("dav_methods"),
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43 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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44 ngx_conf_set_bitmask_slot,
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45 NGX_HTTP_LOC_CONF_OFFSET,
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46 offsetof(ngx_http_dav_loc_conf_t, methods),
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47 &ngx_http_dav_methods_mask },
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48
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186
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49 { ngx_string("create_full_put_path"),
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50 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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51 ngx_conf_set_flag_slot,
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52 NGX_HTTP_LOC_CONF_OFFSET,
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53 offsetof(ngx_http_dav_loc_conf_t, create_full_put_path),
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54 NULL },
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55
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182
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56 ngx_null_command
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57 };
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58
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59
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60 ngx_http_module_t ngx_http_dav_module_ctx = {
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61 NULL, /* preconfiguration */
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62 NULL, /* postconfiguration */
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63
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64 NULL, /* create main configuration */
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65 NULL, /* init main configuration */
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66
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67 NULL, /* create server configuration */
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68 NULL, /* merge server configuration */
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69
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70 ngx_http_dav_create_loc_conf, /* create location configuration */
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71 ngx_http_dav_merge_loc_conf /* merge location configuration */
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72 };
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73
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74
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75 ngx_module_t ngx_http_dav_module = {
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76 NGX_MODULE_V1,
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77 &ngx_http_dav_module_ctx, /* module context */
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78 ngx_http_dav_commands, /* module directives */
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79 NGX_HTTP_MODULE, /* module type */
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80 NULL, /* init master */
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81 ngx_http_dav_init, /* init module */
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82 NULL, /* init process */
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83 NULL, /* init thread */
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84 NULL, /* exit thread */
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85 NULL, /* exit process */
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86 NULL, /* exit master */
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87 NGX_MODULE_V1_PADDING
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88 };
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89
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90
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91 static ngx_int_t
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92 ngx_http_dav_handler(ngx_http_request_t *r)
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93 {
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186
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94 char *failed;
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182
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95 ngx_int_t rc;
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96 ngx_str_t path;
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186
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97 ngx_file_info_t fi;
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182
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98 ngx_http_dav_loc_conf_t *dlcf;
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99
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100 /* TODO: Win32 */
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101 if (r->zero_in_uri) {
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102 return NGX_DECLINED;
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103 }
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104
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105 dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
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106
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107 if (!(r->method & dlcf->methods)) {
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108 return NGX_DECLINED;
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109 }
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110
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111 switch (r->method) {
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112
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113 case NGX_HTTP_PUT:
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114
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115 if (r->uri.data[r->uri.len - 1] == '/') {
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116 return NGX_DECLINED;
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117 }
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118
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186
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119 if (r->headers_in.content_length_n < 0) {
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120 return NGX_HTTP_BAD_REQUEST;
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121 }
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122
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182
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123 r->request_body_in_file_only = 1;
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124 r->request_body_in_persistent_file = 1;
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125 r->request_body_delete_incomplete_file = 1;
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126 r->request_body_file_group_access = 1;
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186
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127 r->request_body_file_log_level = 0;
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182
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128
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129 rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler);
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130
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131 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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132 return rc;
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133 }
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134
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135 return NGX_DONE;
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136
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137 case NGX_HTTP_DELETE:
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138
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186
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139 if (r->headers_in.content_length_n > 0) {
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140 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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141 }
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142
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143 rc = ngx_http_discard_body(r);
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144
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145 if (rc != NGX_OK && rc != NGX_AGAIN) {
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146 return rc;
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182
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147 }
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148
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149 ngx_http_map_uri_to_path(r, &path, 0);
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150
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151 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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152 "http delete filename: \"%s\"", path.data);
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153
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186
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154 if (ngx_file_info(path.data, &fi) != -1) {
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155
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156 if (ngx_is_dir(&fi)) {
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157
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158 if (r->uri.data[r->uri.len - 1] != '/'
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159 || r->headers_in.depth == NULL
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160 || r->headers_in.depth->value.len != sizeof("infinity") - 1
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161 || ngx_strcmp(r->headers_in.depth->value.data, "infinity")
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162 != 0)
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163 {
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164 return NGX_HTTP_BAD_REQUEST;
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165 }
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166
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167 if (ngx_delete_dir(path.data) != NGX_FILE_ERROR) {
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168 return NGX_HTTP_NO_CONTENT;
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169 }
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170
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171 failed = ngx_delete_dir_n;
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172
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173 } else {
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182
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174
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186
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175 if (r->uri.data[r->uri.len - 1] == '/') {
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176 return NGX_HTTP_BAD_REQUEST;
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177 }
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178
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179 if (r->headers_in.depth
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180 && r->headers_in.depth->value.len == 1
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181 && r->headers_in.depth->value.data[0] == '1')
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182 {
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183 return NGX_HTTP_BAD_REQUEST;
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184 }
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185
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186 if (ngx_delete_file(path.data) != NGX_FILE_ERROR) {
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187 return NGX_HTTP_NO_CONTENT;
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188 }
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189
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190 failed = ngx_delete_file_n;
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191 }
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192
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193 } else {
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194 failed = ngx_file_info_n;
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182
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195 }
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196
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186
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197 return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_NOT_FOUND, failed,
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198 path.data);
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199
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200 case NGX_HTTP_MKCOL:
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201
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202 if (r->uri.data[r->uri.len - 1] != '/') {
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203 return NGX_DECLINED;
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204 }
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205
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206 if (r->headers_in.content_length_n > 0) {
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207 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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208 }
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209
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210 rc = ngx_http_discard_body(r);
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211
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212 if (rc != NGX_OK && rc != NGX_AGAIN) {
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213 return rc;
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214 }
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215
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216 ngx_http_map_uri_to_path(r, &path, 0);
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217
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218 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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219 "http mkcol path: \"%s\"", path.data);
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220
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221 if (ngx_create_dir(path.data) != NGX_FILE_ERROR) {
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222 if (ngx_http_dav_location(r, path.data) != NGX_OK) {
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223 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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224 }
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225
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226 return NGX_HTTP_CREATED;
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227 }
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228
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229 return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_CONFLICT,
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230 ngx_create_dir_n, path.data);
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182
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231 }
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232
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233 return NGX_DECLINED;
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234 }
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235
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236
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237 static void
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238 ngx_http_dav_put_handler(ngx_http_request_t *r)
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239 {
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186
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240 ngx_err_t err;
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241 ngx_str_t *temp, path;
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242 ngx_uint_t status;
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243 ngx_file_info_t fi;
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244 ngx_http_dav_loc_conf_t *dlcf;
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182
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245
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246 ngx_http_map_uri_to_path(r, &path, 0);
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247
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248 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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249 "http put filename: \"%s\"", path.data);
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250
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251 temp = &r->request_body->temp_file->file.name;
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252
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253 if (ngx_file_info(path.data, &fi) == -1) {
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254 status = NGX_HTTP_CREATED;
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255
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256 } else {
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257 status = NGX_HTTP_NO_CONTENT;
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258 }
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259
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186
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260 if (ngx_is_dir(&fi)) {
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261 ngx_http_finalize_request(r, NGX_HTTP_CONFLICT);
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262 return;
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263 }
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264
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182
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265 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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266 goto ok;
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267 }
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268
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269 err = ngx_errno;
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270
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186
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271 if (err == NGX_ENOENT) {
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272
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273 dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
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274
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275 if (dlcf->create_full_put_path) {
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276 err = ngx_create_full_path(path.data);
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277
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278 if (err == 0) {
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279 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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280 goto ok;
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281 }
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282
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283 err = ngx_errno;
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284 }
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285 }
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286 }
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287
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182
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288 #if (NGX_WIN32)
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289
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290 if (err == NGX_EEXIST) {
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291 if (ngx_win32_rename_file(temp, &path, r->pool) != NGX_ERROR) {
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292
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293 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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294 goto ok;
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295 }
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296 }
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297
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298 err = ngx_errno;
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299 }
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300
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301 #endif
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302
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186
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303 ngx_http_finalize_request(r, ngx_http_dav_error(r, err, NGX_HTTP_CONFLICT,
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304 ngx_rename_file_n,
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305 path.data));
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182
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306 return;
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307
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308 ok:
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309
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310 if (status == NGX_HTTP_CREATED) {
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186
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311 if (ngx_http_dav_location(r, path.data) != NGX_OK) {
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182
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312 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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313 return;
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314 }
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315 }
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316
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317 r->headers_out.status = status;
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318 r->header_only = 1;
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319
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320 ngx_http_finalize_request(r, ngx_http_send_header(r));
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321 return;
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322 }
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323
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324
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186
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325 static ngx_int_t
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326 ngx_http_dav_error(ngx_http_request_t *r, ngx_err_t err, ngx_int_t not_found,
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327 char *failed, u_char *path)
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328 {
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329 ngx_int_t rc;
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330 ngx_uint_t level;
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331
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332 if (err == NGX_ENOENT || err == NGX_ENOTDIR || err == NGX_ENAMETOOLONG) {
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333 level = NGX_LOG_ERR;
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334 rc = not_found;
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335
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336 } else if (err == NGX_EACCES || err == NGX_EPERM) {
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337 level = NGX_LOG_ERR;
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338 rc = NGX_HTTP_FORBIDDEN;
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339
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340 } else if (err == NGX_EEXIST) {
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341 level = NGX_LOG_ERR;
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342 rc = NGX_HTTP_NOT_ALLOWED;
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343
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344 } else if (err == NGX_ENOSPC) {
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345 level = NGX_LOG_CRIT;
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346 rc = NGX_HTTP_INSUFFICIENT_STORAGE;
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347
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348 } else {
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349 level = NGX_LOG_CRIT;
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350 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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351 }
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352
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353 ngx_log_error(level, r->connection->log, err,
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354 "%s \"%s\" failed", failed, path);
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355
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356 return rc;
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357 }
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358
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359
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360 static ngx_int_t
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361 ngx_http_dav_location(ngx_http_request_t *r, u_char *path)
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362 {
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363 u_char *location;
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364 ngx_http_core_loc_conf_t *clcf;
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365
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366 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
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367 if (r->headers_out.location == NULL) {
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368 return NGX_ERROR;
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369 }
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370
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371 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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372
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373 if (!clcf->alias && clcf->root_lengths == NULL) {
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374 location = path + clcf->root.len;
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375
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376 } else {
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377 location = ngx_palloc(r->pool, r->uri.len);
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378 if (location == NULL) {
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379 return NGX_ERROR;
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380 }
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381
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382 ngx_memcpy(location, r->uri.data, r->uri.len);
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383 }
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384
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385 /*
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386 * we do not need to set the r->headers_out.location->hash and
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387 * r->headers_out.location->key fields
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388 */
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389
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390 r->headers_out.location->value.len = r->uri.len;
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391 r->headers_out.location->value.data = location;
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392
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393 return NGX_OK;
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394 }
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395
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396
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182
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397 static void *
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398 ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
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399 {
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400 ngx_http_dav_loc_conf_t *conf;
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401
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402 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
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403 if (conf == NULL) {
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404 return NGX_CONF_ERROR;
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405 }
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406
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407 /*
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408 * set by ngx_pcalloc():
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409 *
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410 * conf->methods = 0;
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411 */
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412
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186
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413 conf->create_full_put_path = NGX_CONF_UNSET;
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414
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182
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415 return conf;
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416 }
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417
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418
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419 static char *
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420 ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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421 {
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422 ngx_http_dav_loc_conf_t *prev = parent;
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423 ngx_http_dav_loc_conf_t *conf = child;
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424
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425 ngx_conf_merge_bitmask_value(conf->methods, prev->methods,
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186
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426 (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF));
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427
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|
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428 ngx_conf_merge_value(conf->create_full_put_path, prev->create_full_put_path,
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|
|
429 0);
|
|
182
|
430
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|
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431 return NGX_CONF_OK;
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|
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432 }
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433
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434
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|
|
435 static ngx_int_t
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436 ngx_http_dav_init(ngx_cycle_t *cycle)
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|
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437 {
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438 ngx_http_handler_pt *h;
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439 ngx_http_core_main_conf_t *cmcf;
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440
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|
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441 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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|
442
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443 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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|
|
444 if (h == NULL) {
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|
|
445 return NGX_ERROR;
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|
|
446 }
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|
|
447
|
|
|
448 *h = ngx_http_dav_handler;
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|
|
449
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|
450 return NGX_OK;
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|
|
451 }
|
