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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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16 } ngx_http_dav_loc_conf_t;
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17
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18
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19 static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r);
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20 static void ngx_http_dav_put_handler(ngx_http_request_t *r);
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21 static void *ngx_http_dav_create_loc_conf(ngx_conf_t *cf);
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22 static char *ngx_http_dav_merge_loc_conf(ngx_conf_t *cf,
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23 void *parent, void *child);
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24 static ngx_int_t ngx_http_dav_init(ngx_cycle_t *cycle);
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25
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26
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27 static ngx_conf_bitmask_t ngx_http_dav_methods_mask[] = {
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28 { ngx_string("off"), NGX_HTTP_DAV_OFF },
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29 { ngx_string("put"), NGX_HTTP_PUT },
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30 { ngx_string("delete"), NGX_HTTP_DELETE },
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31 { ngx_null_string, 0 }
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32 };
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33
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34
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35 static ngx_command_t ngx_http_dav_commands[] = {
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36
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37 { ngx_string("dav_methods"),
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38 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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39 ngx_conf_set_bitmask_slot,
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40 NGX_HTTP_LOC_CONF_OFFSET,
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41 offsetof(ngx_http_dav_loc_conf_t, methods),
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42 &ngx_http_dav_methods_mask },
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43
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44 ngx_null_command
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45 };
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46
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47
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48 ngx_http_module_t ngx_http_dav_module_ctx = {
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49 NULL, /* preconfiguration */
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50 NULL, /* postconfiguration */
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51
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52 NULL, /* create main configuration */
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53 NULL, /* init main configuration */
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54
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55 NULL, /* create server configuration */
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56 NULL, /* merge server configuration */
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57
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58 ngx_http_dav_create_loc_conf, /* create location configuration */
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59 ngx_http_dav_merge_loc_conf /* merge location configuration */
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60 };
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61
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62
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63 ngx_module_t ngx_http_dav_module = {
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64 NGX_MODULE_V1,
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65 &ngx_http_dav_module_ctx, /* module context */
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66 ngx_http_dav_commands, /* module directives */
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67 NGX_HTTP_MODULE, /* module type */
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68 NULL, /* init master */
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69 ngx_http_dav_init, /* init module */
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70 NULL, /* init process */
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71 NULL, /* init thread */
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72 NULL, /* exit thread */
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73 NULL, /* exit process */
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74 NULL, /* exit master */
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75 NGX_MODULE_V1_PADDING
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76 };
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77
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78
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79 static ngx_int_t
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80 ngx_http_dav_handler(ngx_http_request_t *r)
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81 {
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82 ngx_int_t rc;
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83 ngx_str_t path;
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84 ngx_http_dav_loc_conf_t *dlcf;
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85
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86 /* TODO: Win32 */
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87 if (r->zero_in_uri) {
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88 return NGX_DECLINED;
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89 }
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90
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91 dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
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92
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93 if (!(r->method & dlcf->methods)) {
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94 return NGX_DECLINED;
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95 }
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96
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97 switch (r->method) {
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98
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99 case NGX_HTTP_PUT:
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100
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101 if (r->uri.data[r->uri.len - 1] == '/') {
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102 return NGX_DECLINED;
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103 }
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104
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105 r->request_body_in_file_only = 1;
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106 r->request_body_in_persistent_file = 1;
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107 r->request_body_delete_incomplete_file = 1;
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108 r->request_body_file_group_access = 1;
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109
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110 rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler);
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111
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112 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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113 return rc;
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114 }
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115
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116 return NGX_DONE;
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117
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118 case NGX_HTTP_DELETE:
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119
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120 if (r->uri.data[r->uri.len - 1] == '/') {
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121 return NGX_DECLINED;
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122 }
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123
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124 ngx_http_map_uri_to_path(r, &path, 0);
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125
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126 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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127 "http delete filename: \"%s\"", path.data);
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128
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129 if (ngx_delete_file(path.data) == NGX_FILE_ERROR) {
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130 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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131 ngx_delete_file_n " \"%s\" failed", path.data);
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132
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133 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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134 }
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135
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136 return NGX_HTTP_NO_CONTENT;
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137 }
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138
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139 return NGX_DECLINED;
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140 }
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141
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142
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143 static void
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144 ngx_http_dav_put_handler(ngx_http_request_t *r)
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145 {
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146 u_char *location;
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147 ngx_err_t err;
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148 ngx_str_t *temp, path;
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149 ngx_uint_t status;
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150 ngx_file_info_t fi;
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151 ngx_http_core_loc_conf_t *clcf;
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152
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153 ngx_http_map_uri_to_path(r, &path, 0);
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154
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155 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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156 "http put filename: \"%s\"", path.data);
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157
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158 temp = &r->request_body->temp_file->file.name;
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159
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160 if (ngx_file_info(path.data, &fi) == -1) {
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161 status = NGX_HTTP_CREATED;
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162
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163 } else {
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164 status = NGX_HTTP_NO_CONTENT;
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165 }
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166
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167 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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168 goto ok;
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169 }
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170
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171 err = ngx_errno;
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172
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173 #if (NGX_WIN32)
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174
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175 if (err == NGX_EEXIST) {
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176 if (ngx_win32_rename_file(temp, &path, r->pool) != NGX_ERROR) {
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177
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178 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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179 goto ok;
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180 }
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181 }
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182
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183 err = ngx_errno;
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184 }
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185
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186 #endif
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187
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188 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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189 ngx_rename_file_n " \"%s\" failed", path.data);
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190
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191 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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192 return;
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193
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194 ok:
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195
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196 if (status == NGX_HTTP_CREATED) {
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197
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198 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
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199 if (r->headers_out.location == NULL) {
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200 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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201 return;
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202 }
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203
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204 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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205
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206 if (!clcf->alias && clcf->root_lengths == NULL) {
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207 location = path.data + clcf->root.len;
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208
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209 } else {
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210 location = ngx_palloc(r->pool, r->uri.len);
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211 if (location == NULL) {
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212 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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213 return;
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214 }
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215
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216 ngx_memcpy(location, r->uri.data, r->uri.len);
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217 }
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218
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219 /*
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220 * we do not need to set the r->headers_out.location->hash and
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221 * r->headers_out.location->key fields
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222 */
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223
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224 r->headers_out.location->value.len = r->uri.len;
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225 r->headers_out.location->value.data = location;
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226
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227 }
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228
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229 r->headers_out.status = status;
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230 r->header_only = 1;
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231
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232 ngx_http_finalize_request(r, ngx_http_send_header(r));
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233 return;
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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_create_loc_conf(ngx_conf_t *cf)
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239 {
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240 ngx_http_dav_loc_conf_t *conf;
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241
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242 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
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243 if (conf == NULL) {
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244 return NGX_CONF_ERROR;
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245 }
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246
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247 /*
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248 * set by ngx_pcalloc():
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249 *
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250 * conf->methods = 0;
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251 */
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252
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253 return conf;
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254 }
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255
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256
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257 static char *
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258 ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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259 {
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260 ngx_http_dav_loc_conf_t *prev = parent;
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261 ngx_http_dav_loc_conf_t *conf = child;
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262
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263 ngx_conf_merge_bitmask_value(conf->methods, prev->methods,
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264 (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF));
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265
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266 return NGX_CONF_OK;
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267 }
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268
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269
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270 static ngx_int_t
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271 ngx_http_dav_init(ngx_cycle_t *cycle)
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272 {
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273 ngx_http_handler_pt *h;
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274 ngx_http_core_main_conf_t *cmcf;
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275
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276 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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277
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278 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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279 if (h == NULL) {
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280 return NGX_ERROR;
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281 }
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282
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283 *h = ngx_http_dav_handler;
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284
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285 return NGX_OK;
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286 }
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