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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218
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17 ngx_uint_t access;
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182
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18 } ngx_http_dav_loc_conf_t;
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19
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20
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21 static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r);
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22 static void ngx_http_dav_put_handler(ngx_http_request_t *r);
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186
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23 static ngx_int_t ngx_http_dav_error(ngx_http_request_t *, ngx_err_t err,
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24 ngx_int_t not_found, char *failed, u_char *path);
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25 static ngx_int_t ngx_http_dav_location(ngx_http_request_t *r, u_char *path);
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218
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26 static char *ngx_http_dav_access(ngx_conf_t *cf, ngx_command_t *cmd,
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27 void *conf);
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182
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28 static void *ngx_http_dav_create_loc_conf(ngx_conf_t *cf);
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29 static char *ngx_http_dav_merge_loc_conf(ngx_conf_t *cf,
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30 void *parent, void *child);
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31 static ngx_int_t ngx_http_dav_init(ngx_cycle_t *cycle);
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32
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33
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34 static ngx_conf_bitmask_t ngx_http_dav_methods_mask[] = {
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35 { ngx_string("off"), NGX_HTTP_DAV_OFF },
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36 { ngx_string("put"), NGX_HTTP_PUT },
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37 { ngx_string("delete"), NGX_HTTP_DELETE },
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186
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38 { ngx_string("mkcol"), NGX_HTTP_MKCOL },
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182
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39 { ngx_null_string, 0 }
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40 };
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41
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42
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43 static ngx_command_t ngx_http_dav_commands[] = {
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44
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45 { ngx_string("dav_methods"),
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46 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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47 ngx_conf_set_bitmask_slot,
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48 NGX_HTTP_LOC_CONF_OFFSET,
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49 offsetof(ngx_http_dav_loc_conf_t, methods),
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50 &ngx_http_dav_methods_mask },
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51
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186
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52 { ngx_string("create_full_put_path"),
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53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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54 ngx_conf_set_flag_slot,
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55 NGX_HTTP_LOC_CONF_OFFSET,
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56 offsetof(ngx_http_dav_loc_conf_t, create_full_put_path),
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57 NULL },
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58
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218
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59 { ngx_string("dav_access"),
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224
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60 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
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218
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61 ngx_http_dav_access,
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62 NGX_HTTP_LOC_CONF_OFFSET,
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63 0,
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64 NULL },
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65
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182
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66 ngx_null_command
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67 };
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68
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69
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216
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70 static ngx_http_module_t ngx_http_dav_module_ctx = {
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182
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71 NULL, /* preconfiguration */
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72 NULL, /* postconfiguration */
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73
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74 NULL, /* create main configuration */
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75 NULL, /* init main configuration */
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76
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77 NULL, /* create server configuration */
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78 NULL, /* merge server configuration */
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79
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80 ngx_http_dav_create_loc_conf, /* create location configuration */
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81 ngx_http_dav_merge_loc_conf /* merge location configuration */
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82 };
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83
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84
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85 ngx_module_t ngx_http_dav_module = {
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86 NGX_MODULE_V1,
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87 &ngx_http_dav_module_ctx, /* module context */
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88 ngx_http_dav_commands, /* module directives */
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89 NGX_HTTP_MODULE, /* module type */
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90 NULL, /* init master */
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91 ngx_http_dav_init, /* init module */
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92 NULL, /* init process */
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93 NULL, /* init thread */
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94 NULL, /* exit thread */
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95 NULL, /* exit process */
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96 NULL, /* exit master */
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97 NGX_MODULE_V1_PADDING
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98 };
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99
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100
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101 static ngx_int_t
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102 ngx_http_dav_handler(ngx_http_request_t *r)
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103 {
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186
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104 char *failed;
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182
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105 ngx_int_t rc;
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106 ngx_str_t path;
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186
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107 ngx_file_info_t fi;
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182
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108 ngx_http_dav_loc_conf_t *dlcf;
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109
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110 /* TODO: Win32 */
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111 if (r->zero_in_uri) {
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112 return NGX_DECLINED;
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113 }
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114
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115 dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
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116
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117 if (!(r->method & dlcf->methods)) {
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118 return NGX_DECLINED;
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119 }
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120
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121 switch (r->method) {
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122
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123 case NGX_HTTP_PUT:
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124
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125 if (r->uri.data[r->uri.len - 1] == '/') {
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126 return NGX_DECLINED;
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127 }
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128
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129 r->request_body_in_file_only = 1;
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130 r->request_body_in_persistent_file = 1;
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131 r->request_body_delete_incomplete_file = 1;
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132 r->request_body_file_group_access = 1;
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186
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133 r->request_body_file_log_level = 0;
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182
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134
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135 rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler);
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136
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137 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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138 return rc;
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139 }
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140
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141 return NGX_DONE;
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142
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143 case NGX_HTTP_DELETE:
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144
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186
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145 if (r->headers_in.content_length_n > 0) {
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146 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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147 }
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148
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149 rc = ngx_http_discard_body(r);
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150
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151 if (rc != NGX_OK && rc != NGX_AGAIN) {
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152 return rc;
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182
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153 }
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154
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155 ngx_http_map_uri_to_path(r, &path, 0);
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156
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157 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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158 "http delete filename: \"%s\"", path.data);
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159
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186
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160 if (ngx_file_info(path.data, &fi) != -1) {
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161
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162 if (ngx_is_dir(&fi)) {
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163
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164 if (r->uri.data[r->uri.len - 1] != '/'
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165 || r->headers_in.depth == NULL
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166 || r->headers_in.depth->value.len != sizeof("infinity") - 1
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167 || ngx_strcmp(r->headers_in.depth->value.data, "infinity")
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168 != 0)
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169 {
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170 return NGX_HTTP_BAD_REQUEST;
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171 }
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172
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173 if (ngx_delete_dir(path.data) != NGX_FILE_ERROR) {
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174 return NGX_HTTP_NO_CONTENT;
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175 }
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176
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177 failed = ngx_delete_dir_n;
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178
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179 } else {
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182
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180
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186
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181 if (r->uri.data[r->uri.len - 1] == '/') {
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182 return NGX_HTTP_BAD_REQUEST;
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183 }
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184
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185 if (r->headers_in.depth
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186 && r->headers_in.depth->value.len == 1
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187 && r->headers_in.depth->value.data[0] == '1')
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188 {
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189 return NGX_HTTP_BAD_REQUEST;
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190 }
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191
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192 if (ngx_delete_file(path.data) != NGX_FILE_ERROR) {
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193 return NGX_HTTP_NO_CONTENT;
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194 }
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195
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196 failed = ngx_delete_file_n;
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197 }
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198
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199 } else {
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200 failed = ngx_file_info_n;
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182
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201 }
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202
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186
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203 return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_NOT_FOUND, failed,
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204 path.data);
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205
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206 case NGX_HTTP_MKCOL:
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207
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208 if (r->uri.data[r->uri.len - 1] != '/') {
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209 return NGX_DECLINED;
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210 }
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211
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212 if (r->headers_in.content_length_n > 0) {
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213 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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214 }
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215
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216 rc = ngx_http_discard_body(r);
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217
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218 if (rc != NGX_OK && rc != NGX_AGAIN) {
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219 return rc;
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220 }
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221
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222 ngx_http_map_uri_to_path(r, &path, 0);
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223
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224 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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225 "http mkcol path: \"%s\"", path.data);
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226
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218
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227 if (ngx_create_dir(path.data, dlcf->access) != NGX_FILE_ERROR) {
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186
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228 if (ngx_http_dav_location(r, path.data) != NGX_OK) {
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229 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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230 }
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231
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232 return NGX_HTTP_CREATED;
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233 }
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234
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235 return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_CONFLICT,
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236 ngx_create_dir_n, path.data);
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182
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237 }
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238
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239 return NGX_DECLINED;
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240 }
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241
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242
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243 static void
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244 ngx_http_dav_put_handler(ngx_http_request_t *r)
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245 {
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218
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246 char *failed;
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247 u_char *name;
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186
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248 ngx_err_t err;
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249 ngx_str_t *temp, path;
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250 ngx_uint_t status;
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251 ngx_file_info_t fi;
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252 ngx_http_dav_loc_conf_t *dlcf;
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182
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253
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254 ngx_http_map_uri_to_path(r, &path, 0);
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255
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256 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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257 "http put filename: \"%s\"", path.data);
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258
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259 temp = &r->request_body->temp_file->file.name;
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260
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261 if (ngx_file_info(path.data, &fi) == -1) {
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262 status = NGX_HTTP_CREATED;
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263
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264 } else {
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265 status = NGX_HTTP_NO_CONTENT;
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212
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266
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267 if (ngx_is_dir(&fi)) {
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268 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EISDIR,
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269 "\"%s\" could not be created", path.data);
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182
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270
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212
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271 if (ngx_delete_file(temp->data) == NGX_FILE_ERROR) {
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272 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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273 ngx_delete_file_n " \"%s\" failed",
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274 temp->data);
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275 }
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276
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277 ngx_http_finalize_request(r, NGX_HTTP_CONFLICT);
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278 return;
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210
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279 }
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186
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280 }
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281
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218
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282 dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
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283
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284 #if !(NGX_WIN32)
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285
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286 if (ngx_change_file_access(temp->data, dlcf->access & ~0111)
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287 == NGX_FILE_ERROR)
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288 {
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289 err = ngx_errno;
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290 failed = ngx_change_file_access_n;
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291 name = temp->data;
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292
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293 goto failed;
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294 }
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295
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296 #endif
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297
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298 failed = ngx_rename_file_n;
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299 name = path.data;
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300
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182
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301 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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302 goto ok;
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303 }
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304
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305 err = ngx_errno;
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306
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186
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307 if (err == NGX_ENOENT) {
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308
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309 if (dlcf->create_full_put_path) {
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218
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310 err = ngx_create_full_path(path.data, dlcf->access);
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186
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311
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312 if (err == 0) {
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313 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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314 goto ok;
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315 }
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316
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317 err = ngx_errno;
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318 }
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319 }
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320 }
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321
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182
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322 #if (NGX_WIN32)
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323
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324 if (err == NGX_EEXIST) {
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325 if (ngx_win32_rename_file(temp, &path, r->pool) != NGX_ERROR) {
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326
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327 if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) {
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328 goto ok;
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329 }
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330 }
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331
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332 err = ngx_errno;
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333 }
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334
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218
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335
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336 #else
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337
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338 failed:
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339
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182
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340 #endif
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341
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210
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342 if (ngx_delete_file(temp->data) == NGX_FILE_ERROR) {
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343 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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344 ngx_delete_file_n " \"%s\" failed",
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345 temp->data);
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346 }
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347
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218
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348 ngx_http_finalize_request(r,
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349 ngx_http_dav_error(r, err, NGX_HTTP_CONFLICT, failed, name));
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350
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182
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351 return;
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352
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353 ok:
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354
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355 if (status == NGX_HTTP_CREATED) {
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186
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356 if (ngx_http_dav_location(r, path.data) != NGX_OK) {
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182
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357 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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358 return;
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359 }
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188
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360
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361 r->headers_out.content_length_n = 0;
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182
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362 }
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363
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364 r->headers_out.status = status;
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365 r->header_only = 1;
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366
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367 ngx_http_finalize_request(r, ngx_http_send_header(r));
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368 return;
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369 }
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370
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371
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186
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372 static ngx_int_t
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373 ngx_http_dav_error(ngx_http_request_t *r, ngx_err_t err, ngx_int_t not_found,
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374 char *failed, u_char *path)
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375 {
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376 ngx_int_t rc;
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377 ngx_uint_t level;
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378
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379 if (err == NGX_ENOENT || err == NGX_ENOTDIR || err == NGX_ENAMETOOLONG) {
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380 level = NGX_LOG_ERR;
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381 rc = not_found;
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382
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383 } else if (err == NGX_EACCES || err == NGX_EPERM) {
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384 level = NGX_LOG_ERR;
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385 rc = NGX_HTTP_FORBIDDEN;
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386
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387 } else if (err == NGX_EEXIST) {
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388 level = NGX_LOG_ERR;
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389 rc = NGX_HTTP_NOT_ALLOWED;
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390
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391 } else if (err == NGX_ENOSPC) {
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392 level = NGX_LOG_CRIT;
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393 rc = NGX_HTTP_INSUFFICIENT_STORAGE;
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394
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395 } else {
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396 level = NGX_LOG_CRIT;
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397 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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398 }
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399
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400 ngx_log_error(level, r->connection->log, err,
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401 "%s \"%s\" failed", failed, path);
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402
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403 return rc;
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404 }
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405
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406
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407 static ngx_int_t
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408 ngx_http_dav_location(ngx_http_request_t *r, u_char *path)
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409 {
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410 u_char *location;
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411 ngx_http_core_loc_conf_t *clcf;
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412
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413 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
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414 if (r->headers_out.location == NULL) {
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415 return NGX_ERROR;
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416 }
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417
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418 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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419
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420 if (!clcf->alias && clcf->root_lengths == NULL) {
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421 location = path + clcf->root.len;
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422
|
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423 } else {
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424 location = ngx_palloc(r->pool, r->uri.len);
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425 if (location == NULL) {
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426 return NGX_ERROR;
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427 }
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428
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429 ngx_memcpy(location, r->uri.data, r->uri.len);
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430 }
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431
|
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432 /*
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433 * we do not need to set the r->headers_out.location->hash and
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434 * r->headers_out.location->key fields
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435 */
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436
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437 r->headers_out.location->value.len = r->uri.len;
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438 r->headers_out.location->value.data = location;
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439
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440 return NGX_OK;
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441 }
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442
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443
|
218
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444 static char *
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445 ngx_http_dav_access(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
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446 {
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447 ngx_http_dav_loc_conf_t *lcf = conf;
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448
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449 u_char *p;
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450 ngx_str_t *value;
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451 ngx_uint_t i, right, shift;
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452
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453 if (lcf->access != NGX_CONF_UNSET_UINT) {
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454 return "is duplicate";
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455 }
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|
456
|
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457 value = cf->args->elts;
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458
|
|
459 lcf->access = 0700;
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460
|
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461 for (i = 1; i < 3; i++) {
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462
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463 p = value[i].data;
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464
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465 if (ngx_strncmp(p, "user:", sizeof("user:") - 1) == 0) {
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466 shift = 6;
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467 p += sizeof("user:") - 1;
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468
|
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469 } else if (ngx_strncmp(p, "group:", sizeof("group:") - 1) == 0) {
|
|
470 shift = 3;
|
|
471 p += sizeof("group:") - 1;
|
|
472
|
|
473 } else if (ngx_strncmp(p, "all:", sizeof("all:") - 1) == 0) {
|
|
474 shift = 0;
|
|
475 p += sizeof("all:") - 1;
|
|
476
|
|
477 } else {
|
|
478 goto invalid;
|
|
479 }
|
|
480
|
|
481 if (ngx_strcmp(p, "rw") == 0) {
|
|
482 right = 7;
|
|
483
|
|
484 } else if (ngx_strcmp(p, "r") == 0) {
|
|
485 right = 5;
|
|
486
|
|
487 } else {
|
|
488 goto invalid;
|
|
489 }
|
|
490
|
|
491 lcf->access += right << shift;
|
|
492 }
|
|
493
|
|
494 return NGX_CONF_OK;
|
|
495
|
|
496 invalid:
|
|
497
|
|
498 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
499 "invalid value \"%V\"", &value[i]);
|
|
500 return NGX_CONF_ERROR;
|
|
501 }
|
|
502
|
|
503
|
182
|
504 static void *
|
|
505 ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
|
|
506 {
|
|
507 ngx_http_dav_loc_conf_t *conf;
|
|
508
|
|
509 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
|
|
510 if (conf == NULL) {
|
|
511 return NGX_CONF_ERROR;
|
|
512 }
|
|
513
|
|
514 /*
|
|
515 * set by ngx_pcalloc():
|
|
516 *
|
|
517 * conf->methods = 0;
|
|
518 */
|
|
519
|
186
|
520 conf->create_full_put_path = NGX_CONF_UNSET;
|
218
|
521 conf->access = NGX_CONF_UNSET_UINT;
|
186
|
522
|
182
|
523 return conf;
|
|
524 }
|
|
525
|
|
526
|
|
527 static char *
|
|
528 ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
529 {
|
|
530 ngx_http_dav_loc_conf_t *prev = parent;
|
|
531 ngx_http_dav_loc_conf_t *conf = child;
|
|
532
|
|
533 ngx_conf_merge_bitmask_value(conf->methods, prev->methods,
|
186
|
534 (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF));
|
|
535
|
|
536 ngx_conf_merge_value(conf->create_full_put_path, prev->create_full_put_path,
|
|
537 0);
|
182
|
538
|
218
|
539 ngx_conf_merge_uint_value(conf->access, prev->access, 0600);
|
|
540
|
182
|
541 return NGX_CONF_OK;
|
|
542 }
|
|
543
|
|
544
|
|
545 static ngx_int_t
|
|
546 ngx_http_dav_init(ngx_cycle_t *cycle)
|
|
547 {
|
|
548 ngx_http_handler_pt *h;
|
|
549 ngx_http_core_main_conf_t *cmcf;
|
|
550
|
|
551 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
552
|
|
553 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
554 if (h == NULL) {
|
|
555 return NGX_ERROR;
|
|
556 }
|
|
557
|
|
558 *h = ngx_http_dav_handler;
|
|
559
|
|
560 return NGX_OK;
|
|
561 }
|