src/server/webdav/operation.c

Sun, 11 Jun 2023 15:53:55 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 11 Jun 2023 15:53:55 +0200
changeset 502
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parent 415
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child 503
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permissions
-rw-r--r--

fix non-blocking CGI handler and non-blocking SSL-IO

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2019 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <errno.h>
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32
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33 #include <cx/list.h>
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34
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35 #include "../daemon/session.h"
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36 #include "../util/pblock.h"
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37
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38 #include "operation.h"
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39
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40 #define WEBDAV_PATH_MAX 8192
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41
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42
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43 size_t webdav_num_backends(WebdavBackend *dav) {
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44 size_t count = 0;
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45 while(dav) {
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46 count++;
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47 dav = dav->next;
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48 }
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49 return count;
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50 }
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51
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52 /****************************************************************************
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53 *
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54 * PROPFIND OPERATION
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55 *
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56 ****************************************************************************/
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57
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58 WebdavOperation* webdav_create_propfind_operation(
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59 Session *sn,
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60 Request *rq,
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61 WebdavBackend *dav,
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62 WebdavPList *reqprops,
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63 WebdavPropfindRequestList *requests,
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64 WebdavResponse *response)
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65 {
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66 WebdavOperation *op = pool_malloc(sn->pool, sizeof(WebdavOperation));
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67 ZERO(op, sizeof(WebdavOperation));
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68 op->dav = dav;
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69 op->sn = sn;
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70 op->rq = rq;
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71 op->reqprops = reqprops;
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72 op->requests = requests;
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73 op->response = response;
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74 op->response_close = webdav_op_propfiond_close_resource;
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75 response->op = op;
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76
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77 return op;
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78 }
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79
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80 int webdav_op_propfind_begin(
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81 WebdavOperation *op,
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82 const char *href,
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83 VFS_DIR parent,
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84 struct stat *s)
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85 {
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86 // create WebdavResource object for requested resource
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87 WebdavResource *resource = op->response->addresource(op->response, href);
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88 if(!resource) {
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89 return REQ_ABORTED;
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90 }
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91
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92 // store data that we need when the resource will be closed
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93 op->stat = s;
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94 op->parent = parent;
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95
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96 // get first propfind object
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97 WebdavPropfindRequest *propfind = op->requests->propfind;
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98
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99 // execute propfind_do of the first backend for the first resource
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100 int ret = REQ_PROCEED;
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101 if(op->dav->propfind_do(propfind, op->response, NULL, resource, s)) {
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102 ret = REQ_ABORTED;
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103 } else {
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104 // propfind_do successful, close resource if needed
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105 // closing the resource will execute propfind_do of all remaining
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106 // backends
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107 if(!resource->isclosed) {
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108 ret = resource->close(resource);
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109 }
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110 }
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111
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112 return ret;
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113 }
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114
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115 typedef struct PathSearchElm {
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116 char *href;
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117 char *path;
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118 size_t hreflen;
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119 size_t pathlen;
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120 struct PathSearchElm *next;
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121 } PathSearchElm;
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122
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123 /*
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124 * concats base + / + elm
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125 * if baseinit is true, only elm is copied
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126 */
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127 static int path_buf_concat(
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128 pool_handle_t *pool,
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129 char **buf,
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130 size_t * restrict len,
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131 WSBool * restrict baseinit,
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132 const char *base,
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133 size_t baselen,
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134 const char *elm,
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135 size_t elmlen)
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136 {
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137 if(base[baselen-1] == '/') {
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138 baselen--;
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139 }
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140
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141 size_t newlen = baselen + elmlen + 1;
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142 if(newlen > WEBDAV_PATH_MAX) {
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143 log_ereport(LOG_FAILURE, "webdav: maximal path length exceeded");
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144 return 1;
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145 }
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146
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147 // check if new path + terminator fits in the buffer
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148 if(newlen + 1 > *len) {
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149 *len = newlen + 128;
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150 char *newbuf = pool_realloc(pool, *buf, newlen);
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151 if(newbuf) {
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152 log_ereport(LOG_FAILURE, "webdav: path memory allocation failed");
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153 return 1;
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154 }
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155 *baseinit = FALSE;
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156
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157 *buf = newbuf;
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158 }
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159
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160 // if baseinit is true, the parent is already in the buffer
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161 // and we don't need to memcpy it again
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162 if(!(*baseinit)) {
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163 memcpy(*buf, base, baselen);
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164 (*buf)[baselen] = '/';
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165 *baseinit = TRUE;
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166 }
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167 // copy child and terminate string
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168 memcpy((*buf) + baselen + 1, elm, elmlen);
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169 (*buf)[newlen] = '\0';
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170
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171 return 0;
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172 }
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173
246
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174 static int propfind_child_cb(
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175 VFSContext *vfs,
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176 const char *href,
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177 const char *path,
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178 VFSDir *parent,
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179 struct stat *s,
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180 void *op)
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181 {
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182 return webdav_op_propfind_begin(op, href, parent, s);
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183 }
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184
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185 int webdav_op_propfind_children(
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186 WebdavOperation *op,
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187 VFSContext *vfs,
221
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188 const char *href,
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189 const char *path)
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190 {
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191 WebdavPropfindRequest *request = op->requests->propfind;
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192 return webdav_op_iterate_children(
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193 vfs, request->depth, href, path, propfind_child_cb, op);
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194 }
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195
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196 int webdav_op_propfiond_close_resource(
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197 WebdavOperation *op,
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198 WebdavResource *resource)
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199 {
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200 // start with second backend and request, because
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201 // the first one was already called by webdav_op_propfind_begin
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202 WebdavBackend *dav = op->dav->next;
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203 WebdavPropfindRequestList *request = op->requests->next;
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204
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205 // call propfind_do of all remaining backends
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206 int ret = REQ_PROCEED;
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207 while(dav && request) {
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208 if(dav->propfind_do(
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209 request->propfind,
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210 op->response,
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211 op->parent,
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212 resource,
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213 op->stat))
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214 {
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215 ret = REQ_ABORTED;
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216 }
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217
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218 dav = dav->next;
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219 request = request->next;
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220 }
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221 return ret;
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222 }
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223
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224 /*
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225 * Executes propfind_finish for each Backend
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226 */
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227 int webdav_op_propfind_finish(WebdavOperation *op) {
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228 WebdavBackend *dav = op->dav;
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229 WebdavPropfindRequestList *requests = op->requests;
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230
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231 int ret = REQ_PROCEED;
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232 while(dav && requests) {
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233 if(dav->propfind_finish(requests->propfind)) {
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234 ret = REQ_ABORTED;
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235 }
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236
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237 dav = dav->next;
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238 requests = requests->next;
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239 }
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240 return ret;
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241 }
239
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242
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243 /****************************************************************************
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244 *
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245 * PROPPATCH OPERATION
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246 *
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247 ****************************************************************************/
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248
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249 WebdavOperation* webdav_create_proppatch_operation(
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250 Session *sn,
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251 Request *rq,
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252 WebdavBackend *dav,
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253 WebdavProppatchRequest *proppatch,
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254 WebdavResponse *response)
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255 {
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256 WebdavOperation *op = pool_malloc(sn->pool, sizeof(WebdavOperation));
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257 ZERO(op, sizeof(WebdavOperation));
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258 op->dav = dav;
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259 op->sn = sn;
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260 op->rq = rq;
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261 op->reqprops = NULL;
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262 op->response = response;
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263 op->proppatch = proppatch;
239
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264 op->response_close = webdav_op_proppatch_close_resource;
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265 response->op = op;
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266
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267 return op;
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268 }
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269
241
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270
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271
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272 int webdav_op_proppatch(
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273 WebdavOperation *op,
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274 const char *href,
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275 const char *path)
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276 {
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277 WebdavProppatchRequest *orig_request = op->proppatch;
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278 CxAllocator *a = pool_allocator(op->sn->pool);
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279
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280 // create WebdavResource object for the requested resource
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281 WebdavResource *resource = op->response->addresource(op->response, href);
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282 if(!resource) {
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283 return REQ_ABORTED;
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284 }
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285
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286 // check ACL
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287 if(acl_evaluate(op->sn, op->rq, ACL_WRITE_XATTR)) {
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288 // ACL check failed, either unauthorized or forbidden
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289 // acl_evaluate() sets the http status code and may add
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290 // response headers for authentication
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291 if(op->rq->status_num == PROTOCOL_UNAUTHORIZED) {
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292 return REQ_ABORTED; // return here to send an authenticate response
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293 }
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294
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295 // send multistatus response with status code 403 for each property
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296 log_ereport(LOG_VERBOSE, "webdav-proppatch: access forbidden");
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297 int ret = REQ_PROCEED;
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298 WebdavPList *plist = op->proppatch->set;
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299 for(int i=0;i<2;i++) {
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300 while(plist) {
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301 if(resource->addproperty(resource, plist->property, PROTOCOL_FORBIDDEN)) {
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302 ret = REQ_ABORTED;
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303 break; // OOM
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304 }
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305 plist = plist->next;
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306 }
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307 plist = op->proppatch->remove;
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308 }
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309
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310 if(resource->close(resource)) {
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311 ret = REQ_ABORTED; // OOM
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312 }
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313 return ret;
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314 }
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315
241
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316 VFSContext *ctx = NULL;
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317 VFSFile *file = NULL;
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318
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319 // requests for each backends
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320 WebdavProppatchRequest **requests = pool_calloc(
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321 op->sn->pool,
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322 webdav_num_backends(op->dav),
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323 sizeof(WebdavProppatchRequest*));
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324 if(requests == NULL) {
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325 return REQ_ABORTED;
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326 }
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327
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328 WebdavPList *prev_set = orig_request->set;
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329 WebdavPList *prev_remove = orig_request->remove;
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330 size_t set_count = orig_request->setcount;
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331 size_t remove_count = orig_request->removecount;
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332
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333 int ret = REQ_PROCEED;
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334
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335 // iterate backends and execute proppatch_do
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336 WebdavBackend *dav = op->dav;
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337 size_t numrequests = 0;
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338 while(dav) {
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339 WebdavPList *set = webdav_plist_clone_s(
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340 op->sn->pool,
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341 prev_set,
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342 &set_count);
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343 WebdavPList *remove = webdav_plist_clone_s(
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344 op->sn->pool,
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345 prev_remove,
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346 &remove_count);
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347 if((prev_set && !set) || (prev_remove && !remove)) {
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348 // clone failed, OOM
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349 ret = REQ_ABORTED;
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350 break;
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351 }
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352
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353 // create new WebdavProppatchRequest object for this backend
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354 WebdavProppatchRequest *req = pool_malloc(
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355 op->sn->pool,
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356 sizeof(WebdavProppatchRequest));
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357 memcpy(req, orig_request, sizeof(WebdavProppatchRequest));
306
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358 req->dav = dav;
378
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359 req->set = orig_request->set;
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360 req->setcount = orig_request->setcount;
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361 req->remove = orig_request->remove;
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362 req->removecount = orig_request->removecount;
241
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363 req->userdata = NULL;
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364
263
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365 // check if we need to open the file because the backend wants it
241
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366 if(!file && (dav->settings & WS_WEBDAV_PROPPATCH_USE_VFS)
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367 == WS_WEBDAV_PROPPATCH_USE_VFS)
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368 {
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369 ctx = vfs_request_context(op->sn, op->rq);
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370 if(!ctx) {
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371 ret = REQ_ABORTED;
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372 break;
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373 }
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374
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375 file = vfs_open(ctx, path, O_RDONLY);
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376 if(!file) {
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377 protocol_status(
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378 op->sn,
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379 op->rq,
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380 util_errno2status(ctx->vfs_errno),
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381 NULL);
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382 ret = REQ_ABORTED;
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383 }
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384 }
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385
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386 // execute proppatch_do
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387 if(dav->proppatch_do(req, resource, file, &set, &remove)) {
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388 // return later, because we need do execute proppatch_finish
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389 // for all successfully called backends
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390 ret = REQ_ABORTED;
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391 break;
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392 }
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393
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394 // proppatch_do should remove all handled props from set and remove
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395 // in the next iteration, the backend must use these reduced lists
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396 prev_set = set;
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397 prev_remove = remove;
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398
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399 requests[numrequests++] = req;
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400
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401 // continue with next backend
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402 dav = dav->next;
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403 }
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404
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405 WSBool commit = FALSE;
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406 if(ret == REQ_PROCEED && resource->err == 0) {
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407 // no errors, no properties with errors -> save the changes
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408 commit = TRUE;
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409 }
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410
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411 // call proppatch_finish for each successfully called proppatch_do
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412 dav = op->dav;
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413 int i = 0;
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414 while(dav && i < numrequests) {
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415 if(dav->proppatch_finish(requests[i], resource, file, commit)) {
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416 ret = REQ_ABORTED;
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417 }
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418 i++;
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419 dav = dav->next;
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420 }
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421
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422 if(file) {
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423 vfs_close(file);
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424 }
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425
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426 if(resource->close(resource)) {
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427 ret = REQ_ABORTED;
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428 }
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429
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430 return ret;
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431 }
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432
239
d5031c30022c make multistatus response ready for proppatch requests
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433 int webdav_op_proppatch_close_resource(
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434 WebdavOperation *op,
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435 WebdavResource *resource)
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436 {
241
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437 return 0; // NOP
239
d5031c30022c make multistatus response ready for proppatch requests
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438 }
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439
245
a193c42fc809 add mkcol and delete interface to webdav backend, move webdav vfs logic to operation
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440
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441 /****************************************************************************
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442 *
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443 * VFS OPERATION
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444 *
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445 ****************************************************************************/
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446
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diff changeset
447 WebdavVFSOperation* webdav_vfs_op(
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diff changeset
448 Session *sn,
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diff changeset
449 Request *rq,
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450 WebdavBackend *dav,
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diff changeset
451 WSBool precondition)
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diff changeset
452 {
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diff changeset
453 WebdavVFSOperation *op = pool_malloc(sn->pool, sizeof(WebdavVFSOperation));
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454 if(!op) {
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455 return NULL;
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456 }
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diff changeset
457 ZERO(op, sizeof(WebdavVFSOperation));
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458
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diff changeset
459 op->sn = sn;
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diff changeset
460 op->rq = rq;
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diff changeset
461 op->dav = dav;
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diff changeset
462 op->stat = NULL;
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diff changeset
463 op->stat_errno = 0;
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diff changeset
464
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465 // create VFS context
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diff changeset
466 VFSContext *vfs = vfs_request_context(sn, rq);
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467 if(!vfs) {
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468 pool_free(sn->pool, op);
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diff changeset
469 return NULL;
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470 }
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471 op->vfs = vfs;
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472
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diff changeset
473 char *path = pblock_findkeyval(pb_key_path, rq->vars);
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diff changeset
474 op->path = path;
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diff changeset
475
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476 return op;
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diff changeset
477 }
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diff changeset
478
247
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diff changeset
479 WebdavVFSOperation webdav_vfs_sub_op(
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480 WebdavVFSOperation *op,
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481 char *path,
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diff changeset
482 struct stat *s)
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483 {
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484 WebdavVFSOperation sub;
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485 sub.dav = op->dav;
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486 sub.path = path;
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487 sub.sn = op->sn;
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488 sub.vfs = op->vfs;
249
3b302093945c add webdav_delete tests
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489 sub.path = path;
247
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490 sub.stat = s;
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491 sub.stat_errno = 0;
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492 return sub;
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493 }
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diff changeset
494
246
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diff changeset
495 int webdav_op_iterate_children(
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496 VFSContext *vfs,
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497 int depth,
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498 const char *href,
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499 const char *path,
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
500 vfs_op_child_func func,
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501 void *userdata)
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
502 {
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
503 pool_handle_t *pool = vfs->sn->pool;
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504
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
505 PathSearchElm *start_elm = pool_malloc(pool, sizeof(PathSearchElm));
247
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diff changeset
506 start_elm->href = pool_strdup(pool, href ? href : "");
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diff changeset
507 start_elm->path = pool_strdup(pool, path ? path : "");
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diff changeset
508 start_elm->hreflen = href ? strlen(href) : 0;
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diff changeset
509 start_elm->pathlen = path ? strlen(path) : 0;
415
d938228c382e switch from ucx 2 to 3
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parents: 413
diff changeset
510 start_elm->next = NULL;
246
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
511
415
d938228c382e switch from ucx 2 to 3
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parents: 413
diff changeset
512 PathSearchElm *stack = start_elm;
d938228c382e switch from ucx 2 to 3
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diff changeset
513 PathSearchElm *stack_end = start_elm;
246
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
514
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
515 // reusable buffer for full child path and href
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diff changeset
516 char *newpath = pool_malloc(pool, 256);
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517 size_t newpathlen = 256;
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518
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
519 char *newhref = pool_malloc(pool, 256);
155bdef7fe7e add webdav op function for iterating directories
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520 size_t newhreflen = 256;
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diff changeset
521
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
522 int err = 0;
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diff changeset
523 while(stack && !err) {
415
d938228c382e switch from ucx 2 to 3
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diff changeset
524 PathSearchElm *cur_elm = stack;
246
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diff changeset
525
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
526 // when newpath is initialized with the parent path
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
527 // set path_buf_init to TRUE
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
528 WSBool href_buf_init = FALSE;
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
529 WSBool path_buf_init = FALSE;
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diff changeset
530
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
531 VFS_DIR dir = vfs_opendir(vfs, cur_elm->path);
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
532 if(!dir) {
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
533 log_ereport(
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
534 LOG_FAILURE,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
535 "webdav: propfind: cannot open directory %d",
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
536 vfs->vfs_errno);
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
537 err = 1;
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
538 break;
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
539 }
155bdef7fe7e add webdav op function for iterating directories
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diff changeset
540
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
541 VFS_ENTRY f;
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
542 while(vfs_readdir_stat(dir, &f)) {
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
543 if(f.stat_errno != 0) {
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
544 continue;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
545 }
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
546
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
547 size_t child_len = strlen(f.name);
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
548
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
549 // create new path and href for the child
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
550 if(path_buf_concat(
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
551 pool,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
552 &newhref,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
553 &newhreflen,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
554 &href_buf_init,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
555 cur_elm->href,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
556 cur_elm->hreflen,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
557 f.name,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
558 child_len))
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
559 {
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
560 err = 1;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
561 break;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
562 }
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
563 if(path_buf_concat(
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
564 pool,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
565 &newpath,
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
566 &newpathlen,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
567 &path_buf_init,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
568 cur_elm->path,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
569 cur_elm->pathlen,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
570 f.name,
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
571 child_len))
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
572 {
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
573 err = 1;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
574 break;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
575 }
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
576 size_t childhreflen = cur_elm->hreflen + 1 + child_len;
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
577 size_t childpathlen = cur_elm->pathlen + 1 + child_len;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
578
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
579 // execute callback func for this file
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
580 if(func(vfs, newhref, newpath, dir, &f.stat, userdata)) {
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
581 err = 1;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
582 break;
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
583 }
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
584
155bdef7fe7e add webdav op function for iterating directories
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 245
diff changeset
585 // depth of -1 means infinity
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
586 if(depth == -1 && S_ISDIR(f.stat.st_mode)) {
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
587 char *hrefcp = pool_malloc(pool, childhreflen + 1);
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
588 memcpy(hrefcp, newhref, childhreflen + 1);
155bdef7fe7e add webdav op function for iterating directories
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parents: 245
diff changeset
589 hrefcp[childhreflen] = '\0';
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590
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591 char *pathcp = pool_malloc(pool, childpathlen + 1);
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592 memcpy(pathcp, newpath, childpathlen + 1);
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593 pathcp[childpathlen] = '\0';
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594
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595 PathSearchElm *new_elm = pool_malloc(pool,
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596 sizeof(PathSearchElm));
415
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597 if(!new_elm) {
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598 err = 1;
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599 break;
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600 }
246
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601 new_elm->href = hrefcp;
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602 new_elm->path = pathcp;
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603 new_elm->hreflen = childhreflen;
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604 new_elm->pathlen = childpathlen;
415
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605 new_elm->next = NULL;
246
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606
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607 // add the new_elm to the stack
415
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608 // stack_end is always not NULL here, because the loop is
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609 // running as long as we have a stack and we remove
246
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610 // the first stack element at the end of the loop
415
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611 stack_end->next = new_elm;
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612 stack_end = new_elm;
246
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613 }
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614 }
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615
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616 vfs_closedir(dir);
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617
415
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618 stack = stack->next;
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619
246
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620 pool_free(pool, cur_elm->path);
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621 pool_free(pool, cur_elm->href);
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622 pool_free(pool, cur_elm);
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623 }
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624
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625 // in case of an error, we have to free all remaining stack elements
415
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626 for(PathSearchElm *elm=stack;elm;) {
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627 PathSearchElm *next_elm = elm->next;
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628 pool_free(pool, elm->path);
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629 pool_free(pool, elm->href);
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630 pool_free(pool, elm);
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631 elm = next_elm;
246
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632 }
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633
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634 return err;
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635 }
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636
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637
245
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638 int webdav_vfs_stat(WebdavVFSOperation *op) {
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639 if(op->stat) {
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640 return 0;
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641 } else if(op->stat_errno != 0) {
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642 // previous stat failed
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643 return 1;
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644 }
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645
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646 // stat file
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647 struct stat sbuf;
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648 int ret = vfs_stat(op->vfs, op->path, &sbuf);
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649 if(!ret) {
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650 // save result in op->stat and in s
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651 op->stat = pool_malloc(op->sn->pool, sizeof(struct stat));
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652 if(op->stat) {
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653 memcpy(op->stat, &sbuf, sizeof(struct stat));
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654 } else {
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655 ret = 1;
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656 op->stat_errno = ENOMEM;
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657 }
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658 } else {
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659 op->stat_errno = errno;
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660 }
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661
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662 return ret;
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663 }
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664
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665 int webdav_vfs_op_do(WebdavVFSOperation *op, WebdavVFSOpType type) {
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666 WSBool exec_vfs = TRUE;
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667
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668 // requests for each backends
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669 WebdavVFSRequest **requests = pool_calloc(
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670 op->sn->pool,
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671 webdav_num_backends(op->dav),
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672 sizeof(WebdavVFSRequest*));
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673 if(requests == NULL) {
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674 return REQ_ABORTED;
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675 }
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676
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677 int ret = REQ_PROCEED;
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678
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679 // call opt_* func for each backend
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680 WebdavBackend *dav = op->dav;
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681 int called_backends = 0;
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682 while(dav) {
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683 WebdavVFSRequest *request = NULL;
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684
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685 // get vfs operation functions
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686 vfs_op_func op_func = NULL;
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687 vfs_op_finish_func op_finish_func = NULL;
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688
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689 if(type == WEBDAV_VFS_MKDIR) {
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690 op_func = dav->opt_mkcol;
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691 op_finish_func = dav->opt_mkcol_finish;
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692 } else if(type == WEBDAV_VFS_DELETE) {
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693 op_func = dav->opt_delete;
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694 op_finish_func = dav->opt_delete_finish;
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695 }
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696
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697 if(op_func || op_finish_func) {
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698 // we need a request object
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699 request = pool_malloc(op->sn->pool, sizeof(WebdavVFSRequest));
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700 if(!request) {
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701 exec_vfs = FALSE;
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702 ret = REQ_ABORTED;
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703 break;
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704 }
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705 request->sn = op->sn;
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706 request->rq = op->rq;
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707 request->path = op->path;
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708 request->userdata = NULL;
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709
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710 requests[called_backends] = request;
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711 }
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712
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713 // exec backend func for this operation
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714 // this will set 'done' to TRUE, if no further vfs call is required
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715 WSBool done = FALSE;
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716 called_backends++;
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717 if(op_func) {
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718 if(op_func(request, &done)) {
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719 exec_vfs = FALSE;
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720 ret = REQ_ABORTED;
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721 break;
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722 }
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723 }
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724 if(done) {
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725 exec_vfs = FALSE;
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726 }
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727
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728 dav = dav->next;
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729 }
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730
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731 // if needed, call vfs func for this operation
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732 if(exec_vfs) {
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733 int r = 0;
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734 if(type == WEBDAV_VFS_MKDIR) {
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735 r = vfs_mkdir(op->vfs, op->path);
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736 } else if(type == WEBDAV_VFS_DELETE) {
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737 r = webdav_vfs_unlink(op);
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738 }
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739
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740 if(r) {
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741 ret = REQ_ABORTED;
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742 }
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743 }
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744
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745 WSBool success = ret == REQ_PROCEED ? TRUE : FALSE;
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746
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747 // finish mkcol (cleanup) by calling opt_*_finish for each backend
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748 dav = op->dav;
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749 int i = 0;
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750 while(dav && i < called_backends) {
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751 // get vfs operation functions
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752 vfs_op_finish_func op_finish_func = NULL;
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753
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754 if(type == WEBDAV_VFS_MKDIR) {
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755 op_finish_func = dav->opt_mkcol_finish;
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756 } else if(type == WEBDAV_VFS_DELETE) {
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757 op_finish_func = dav->opt_delete_finish;
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758 }
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759
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760 if(op_finish_func) {
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761 if(op_finish_func(requests[i], success)) {
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762 ret = REQ_ABORTED; // don't exit loop
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763 }
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764 }
a193c42fc809 add mkcol and delete interface to webdav backend, move webdav vfs logic to operation
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765
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766 dav = dav->next;
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767 i++;
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768 }
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769
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770 return ret;
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771 }
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772
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773 int webdav_vfs_unlink(WebdavVFSOperation *op) {
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774 // stat the file first, to check if the file is a directory
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775 if(webdav_vfs_stat(op)) {
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776 return 1; // error
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777 } else {
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778 if(!S_ISDIR(op->stat->st_mode)) {
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779 return vfs_unlink(op->vfs, op->path);
247
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780 } else {
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781 return vfs_rmdir(op->vfs, op->path);
245
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782 }
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diff changeset
783 }
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784 }

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