src/server/safs/nametrans.c

Thu, 13 Oct 2022 19:26:15 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 13 Oct 2022 19:26:15 +0200
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parent 369
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child 415
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permissions
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use IPV6_V6ONLY socket option on linux

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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 2016 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 "nametrans.h"
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30
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31 #include "../daemon/log.h"
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32 #include "../daemon/request.h"
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33 #include "../util/pblock.h"
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34 #include "../util/util.h"
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35 #include "../public/webdav.h"
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36
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37 #include "../daemon/session.h"
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38 #include "../daemon/config.h"
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39
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40 #include "../public/vfs.h"
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41
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42 static int initialize_dav_repo(pblock *pb, Session *sn, Request *rq, WebdavRepository *repo) {
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43 if(repo->vfs) {
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44 VFS *vfs = repo->vfs->create(sn, rq, pb, repo->vfsInitData);
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45 if(!vfs) {
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46 return REQ_ABORTED;
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47 }
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48 rq->vfs = vfs;
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49 }
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51 WebdavBackend *backend_first = NULL;
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52 WebdavBackend *backend_last = NULL;
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53 UCX_FOREACH(elm, repo->davBackends) {
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54 WebdavBackendInitData *davInit = elm->data;
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55 WebdavBackend *backend = davInit->davType->create(sn, rq, pb, davInit->davInitData);
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56 if(!backend) {
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57 return REQ_ABORTED;
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58 }
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60 if(backend_last) {
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61 backend_last->next = backend;
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62 backend_last = backend;
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63 } else {
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64 backend_first = backend;
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65 backend_last = backend;
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66 }
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67 }
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68 rq->davCollection = backend_first;
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70 return 0;
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71 }
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73 static int nametrans_set_dav_repository(pblock *pb, Session *sn, Request *rq) {
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74 char *dav = pblock_findkeyval(pb_key_dav, pb);
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75 if(!dav) return 0;
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77 ServerConfiguration *config = session_get_config(sn);
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78 WebdavRepository *repo = ucx_map_cstr_get(config->dav, dav);
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80 if(!repo) {
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81 log_ereport(LOG_MISCONFIG, "nametrans: unknown dav repository '%s'", dav);
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82 return REQ_ABORTED;
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83 }
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84
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85 return initialize_dav_repo(pb, sn, rq, repo);
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86 }
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88 static int nametrans_set_vfs(pblock *pb, Session *sn, Request *rq) {
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89 char *vfsclass = pblock_findkeyval(pb_key_vfsclass, pb);
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90 if(!vfsclass) return 0;
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91
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92 VFS *vfs = vfs_create(sn, rq, vfsclass, pb, NULL);
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93 if(!vfs) {
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94 return 1;
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95 }
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96 rq->vfs = vfs;
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97 return 0;
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98 }
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100 static int nametrans_set_dav(pblock *pb, Session *sn, Request *rq) {
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101 char *davclass = pblock_findkeyval(pb_key_davclass, pb);
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102 if(!davclass) return 0;
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103
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104 WebdavBackend *dav = webdav_create(sn, rq, davclass, pb, NULL);
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105
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106 rq->davCollection = dav;
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107 return 0;
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108 }
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109
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110 /*
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111 * assign_name
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112 *
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113 * Assigns the name specified by the name parameter if the uri has the
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114 * specified prefix.
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115 *
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116 * pblock parameter:
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117 * name object name
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118 * from optional uri prefix
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119 */
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120 int assign_name(pblock *pb, Session *sn, Request *rq) {
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121 /* TODO: expression instead of simple prefix */
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122
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123 char *name = pblock_findkeyval(pb_key_name, pb);
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124 char *from = pblock_findkeyval(pb_key_from, pb);
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125
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126 if(!name) {
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127 log_ereport(LOG_MISCONFIG, "assign-name: missing name parameter");
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128 protocol_status(sn, rq, 500, NULL);
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129 return REQ_ABORTED;
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130 }
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131
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132 if(from) {
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133 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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134 char c;
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135 int i = 0;
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136 while((c = from[i]) != 0) {
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137 if(c != uri[i]) {
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138 return REQ_NOACTION;
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139 }
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140 i++;
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141 }
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142 }
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143
369
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144 if(nametrans_set_dav_repository(pb, sn, rq)) {
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145 log_ereport(LOG_FAILURE, "assign-name: cannot create dav repository: name=%s from=%s", name, from);
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146 return REQ_ABORTED;
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147 }
277
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148 if(nametrans_set_vfs(pb, sn, rq)) {
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149 log_ereport(LOG_FAILURE, "assign-name: cannot create VFS: name=%s from=%s", name, from);
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150 return REQ_ABORTED;
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151 }
369
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152 if(nametrans_set_dav(pb, sn, rq)) {
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153 log_ereport(LOG_FAILURE, "assign-name: cannot create Webdav Backend: name=%s from=%s", name, from);
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154 return REQ_ABORTED;
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155 }
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156
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157 // add object to rq->vars
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158 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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159
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160 return REQ_NOACTION;
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161 }
96
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162
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163 /*
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164 * document_root
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165 *
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166 * Specifies the document root directory.
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167 *
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168 * pblock parameter:
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169 * root path to document root
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170 */
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171 int document_root(pblock *pb, Session *sn, Request *rq) {
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172 char *root = pblock_findkeyval(pb_key_root, pb);
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173 if(!root) {
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174 log_ereport(LOG_MISCONFIG, "document-root: missing root parameter");
96
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175 protocol_status(sn, rq, 500, NULL);
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176 return REQ_ABORTED;
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177 }
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178
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179 if(nametrans_set_vfs(pb, sn, rq)) {
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180 log_ereport(LOG_FAILURE, "document-root: cannot create VFS");
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181 return REQ_ABORTED;
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182 }
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183
96
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184 sstr_t root_str = sstr(root);
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185 sstr_t uri_str = sstr(pblock_findkeyval(pb_key_uri, rq->reqpb));
116
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186
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187 request_set_path(root_str, uri_str, rq->vars);
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188
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189 return REQ_PROCEED;
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190 }
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191
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192 /*
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193 * pfx2dir
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194 *
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195 * ...
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196 *
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197 * pblock parameter:
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198 * from prefix
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199 * dir file system directory
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200 * name (optional) object name
369
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201 * dav (optional) dav repository name
325
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202 * vfsclass (optional) vfs name
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203 * davclass (optional) dav backend
96
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204 *
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205 */
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206 int pfx2dir(pblock *pb, Session *sn, Request *rq) {
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207 char *from = pblock_findkeyval(pb_key_from, pb);
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208 char *dir = pblock_findkeyval(pb_key_dir, pb);
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209 char *name = pblock_findkeyval(pb_key_name, pb);
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210
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211 if(!from || !dir) {
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212 if(!from && dir) {
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213 log_ereport(LOG_MISCONFIG, "pfx2dir: missing from parameter");
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214 } else if(!dir && from) {
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215 log_ereport(LOG_MISCONFIG, "pfx2dir: missing dir parameter");
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216 } else {
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217 log_ereport(
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218 LOG_MISCONFIG,
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219 "pfx2dir: missing from and dir parameter");
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220 }
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221 protocol_status(sn, rq, 500, NULL);
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222 return REQ_ABORTED;
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223 }
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224
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225 // check prefix
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226 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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227 char fc;
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228 char uc;
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229 int i = 0;
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230 while((fc = from[i]) != 0) {
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231 uc = uri[i];
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232 if(fc != uc) {
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233 return REQ_NOACTION;
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234 }
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235 i++;
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236 }
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237
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238 // url has the specified prefix
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239
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240 uri = uri + i;
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241 if(uri[0] == '/') {
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242 uri++;
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243 }
116
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244
369
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245 if(nametrans_set_dav_repository(pb, sn, rq)) {
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246 log_ereport(LOG_FAILURE, "pfx2dir: cannot create dav repository: from=%s dir=%s name=%s", from, dir, name);
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247 return REQ_ABORTED;
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248 }
277
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249 if(nametrans_set_vfs(pb, sn, rq)) {
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250 log_ereport(LOG_FAILURE, "pfx2dir: cannot create VFS: from=%s dir=%s name=%s", from, dir, name);
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251 return REQ_ABORTED;
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252 }
325
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253 if(nametrans_set_dav(pb, sn, rq)) {
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254 log_ereport(LOG_FAILURE, "pfx2dir: cannot create Webdav Backend: from=%s dir=%s name=%s", from, dir, name);
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255 return REQ_ABORTED;
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256 }
277
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257
116
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258 request_set_path(sstr(dir), sstr(uri), rq->vars);
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259
96
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260 if(name) {
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261 // add object to rq->vars
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262 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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263 }
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264
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265 return REQ_PROCEED;
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266 }
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267
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268
137
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269 int redirect(pblock *pb, Session *sn, Request *rq) {
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270 char *from = pblock_findval("from", pb);
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271 char *url = pblock_findval("url", pb);
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272
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273 if(!from || !url) {
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274 log_ereport(LOG_MISCONFIG, "redirect: missing parameter (from, url)");
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275 return REQ_ABORTED;
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276 }
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277
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278 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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279 if(!strcmp(uri, from)) {
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280 pblock_nvinsert("location", url, rq->srvhdrs);
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281
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282 protocol_status(sn, rq, 302, NULL);
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283 return REQ_ABORTED;
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284 }
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285
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286 return REQ_NOACTION;
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287 }
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288
136
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289 /*
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290 * provisional rewrite saf
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291 */
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292 int simple_rewrite(pblock *pb, Session *sn, Request *rq) {
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293 char *from = pblock_findval("from", pb);
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294 char *root = pblock_findval("root", pb);
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295 char *path = pblock_findval("path", pb);
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296 char *name = pblock_findval("name", pb);
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297
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298 if(!from || !path || !root) {
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299 log_ereport(LOG_MISCONFIG, "simple-rewrite: missing parameter (from, root, path)");
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300 return REQ_ABORTED;
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301 }
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302
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303 if(nametrans_set_vfs(pb, sn, rq)) {
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304 log_ereport(LOG_FAILURE, "simple-rewrite: cannot create VFS: from=%s root=%s path=%s name=%s", from, root, path, name);
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305 return REQ_ABORTED;
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306 }
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307
136
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308 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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309 sstr_t u = sstr(uri);
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310 sstr_t f = sstr(from);
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311 if(sstrprefix(u, f)) {
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312 sstr_t suf = sstrsubs(u, f.length);
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313 sstr_t ppath = sstrcat(2, sstr(path), suf);
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314
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315 request_set_path(sstr(root), ppath, rq->vars);
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316 free(ppath.ptr);
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317
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318 if(name) {
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319 // add object to rq->vars
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320 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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321 }
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322 }
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323
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324 return REQ_NOACTION;
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325 }

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