src/server/safs/nametrans.c

Sat, 26 Nov 2022 17:07:08 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 26 Nov 2022 17:07:08 +0100
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parent 415
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child 490
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refactore http listener creation

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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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50
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51 void *backend_first = NULL;
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52 void *backend_last = NULL;
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53 CxIterator i = cxListIterator(repo->davBackends, 0);
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54 cx_foreach(WebdavBackendInitData *, davInit, i) {
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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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59 cx_linked_list_add(&backend_first, &backend_last, -1, offsetof(WebdavBackend, next), backend);
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60 }
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61 rq->davCollection = backend_first;
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63 return 0;
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64 }
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66 static int nametrans_set_dav_repository(pblock *pb, Session *sn, Request *rq) {
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67 char *dav = pblock_findkeyval(pb_key_dav, pb);
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68 if(!dav) return 0;
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70 ServerConfiguration *config = session_get_config(sn);
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71 WebdavRepository *repo = cxMapGet(config->dav, cx_hash_key_str(dav));
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73 if(!repo) {
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74 log_ereport(LOG_MISCONFIG, "nametrans: unknown dav repository '%s'", dav);
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75 return REQ_ABORTED;
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76 }
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78 return initialize_dav_repo(pb, sn, rq, repo);
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79 }
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80
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81 static int nametrans_set_vfs(pblock *pb, Session *sn, Request *rq) {
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82 char *vfsclass = pblock_findkeyval(pb_key_vfsclass, pb);
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83 if(!vfsclass) return 0;
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84
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85 VFS *vfs = vfs_create(sn, rq, vfsclass, pb, NULL);
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86 if(!vfs) {
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87 return 1;
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88 }
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89 rq->vfs = vfs;
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90 return 0;
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91 }
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93 static int nametrans_set_dav(pblock *pb, Session *sn, Request *rq) {
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94 char *davclass = pblock_findkeyval(pb_key_davclass, pb);
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95 if(!davclass) return 0;
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96
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97 WebdavBackend *dav = webdav_create(sn, rq, davclass, pb, NULL);
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98
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99 rq->davCollection = dav;
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100 return 0;
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101 }
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102
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103 /*
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104 * assign_name
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105 *
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106 * Assigns the name specified by the name parameter if the uri has the
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107 * specified prefix.
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108 *
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109 * pblock parameter:
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110 * name object name
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111 * from optional uri prefix
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112 */
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113 int assign_name(pblock *pb, Session *sn, Request *rq) {
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114 /* TODO: expression instead of simple prefix */
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115
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116 char *name = pblock_findkeyval(pb_key_name, pb);
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117 char *from = pblock_findkeyval(pb_key_from, pb);
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118
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119 if(!name) {
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120 log_ereport(LOG_MISCONFIG, "assign-name: missing name parameter");
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121 protocol_status(sn, rq, 500, NULL);
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122 return REQ_ABORTED;
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123 }
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124
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125 if(from) {
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126 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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127 char c;
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128 int i = 0;
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129 while((c = from[i]) != 0) {
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130 if(c != uri[i]) {
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131 return REQ_NOACTION;
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132 }
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133 i++;
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134 }
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135 }
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136
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137 if(nametrans_set_dav_repository(pb, sn, rq)) {
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138 log_ereport(LOG_FAILURE, "assign-name: cannot create dav repository: name=%s from=%s", name, from);
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139 return REQ_ABORTED;
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140 }
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141 if(nametrans_set_vfs(pb, sn, rq)) {
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142 log_ereport(LOG_FAILURE, "assign-name: cannot create VFS: name=%s from=%s", name, from);
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143 return REQ_ABORTED;
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144 }
369
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145 if(nametrans_set_dav(pb, sn, rq)) {
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146 log_ereport(LOG_FAILURE, "assign-name: cannot create Webdav Backend: name=%s from=%s", name, from);
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147 return REQ_ABORTED;
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148 }
14
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149
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150 // add object to rq->vars
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151 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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152
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153 return REQ_NOACTION;
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154 }
96
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155
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156 /*
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157 * document_root
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158 *
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159 * Specifies the document root directory.
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160 *
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161 * pblock parameter:
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162 * root path to document root
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163 */
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164 int document_root(pblock *pb, Session *sn, Request *rq) {
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165 char *root = pblock_findkeyval(pb_key_root, pb);
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166 if(!root) {
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167 log_ereport(LOG_MISCONFIG, "document-root: missing root parameter");
96
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168 protocol_status(sn, rq, 500, NULL);
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169 return REQ_ABORTED;
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170 }
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171
277
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172 if(nametrans_set_vfs(pb, sn, rq)) {
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173 log_ereport(LOG_FAILURE, "document-root: cannot create VFS");
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174 return REQ_ABORTED;
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175 }
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176
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177 cxstring root_str = cx_str(root);
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178 cxstring uri_str = cx_str(pblock_findkeyval(pb_key_uri, rq->reqpb));
116
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179
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180 request_set_path(root_str, uri_str, rq->vars);
96
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181
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182 return REQ_PROCEED;
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183 }
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184
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185 /*
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186 * pfx2dir
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187 *
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188 * ...
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189 *
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190 * pblock parameter:
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191 * from prefix
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192 * dir file system directory
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193 * name (optional) object name
369
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194 * dav (optional) dav repository name
325
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195 * vfsclass (optional) vfs name
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196 * davclass (optional) dav backend
96
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197 *
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198 */
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199 int pfx2dir(pblock *pb, Session *sn, Request *rq) {
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200 char *from = pblock_findkeyval(pb_key_from, pb);
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201 char *dir = pblock_findkeyval(pb_key_dir, pb);
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202 char *name = pblock_findkeyval(pb_key_name, pb);
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203
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204 if(!from || !dir) {
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205 if(!from && dir) {
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206 log_ereport(LOG_MISCONFIG, "pfx2dir: missing from parameter");
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207 } else if(!dir && from) {
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208 log_ereport(LOG_MISCONFIG, "pfx2dir: missing dir parameter");
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209 } else {
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210 log_ereport(
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211 LOG_MISCONFIG,
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212 "pfx2dir: missing from and dir parameter");
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213 }
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214 protocol_status(sn, rq, 500, NULL);
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215 return REQ_ABORTED;
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216 }
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217
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218 // check prefix
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219 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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220 char fc;
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221 char uc;
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222 int i = 0;
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223 while((fc = from[i]) != 0) {
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224 uc = uri[i];
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225 if(fc != uc) {
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226 return REQ_NOACTION;
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227 }
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228 i++;
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229 }
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230
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231 // url has the specified prefix
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232
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233 uri = uri + i;
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234 if(uri[0] == '/') {
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235 uri++;
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236 }
116
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237
369
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238 if(nametrans_set_dav_repository(pb, sn, rq)) {
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239 log_ereport(LOG_FAILURE, "pfx2dir: cannot create dav repository: from=%s dir=%s name=%s", from, dir, name);
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240 return REQ_ABORTED;
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241 }
277
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242 if(nametrans_set_vfs(pb, sn, rq)) {
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243 log_ereport(LOG_FAILURE, "pfx2dir: cannot create VFS: from=%s dir=%s name=%s", from, dir, name);
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244 return REQ_ABORTED;
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245 }
325
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246 if(nametrans_set_dav(pb, sn, rq)) {
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247 log_ereport(LOG_FAILURE, "pfx2dir: cannot create Webdav Backend: from=%s dir=%s name=%s", from, dir, name);
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248 return REQ_ABORTED;
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249 }
277
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250
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251 request_set_path(cx_str(dir), cx_str(uri), rq->vars);
116
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252
96
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253 if(name) {
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254 // add object to rq->vars
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255 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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256 }
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257
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258 return REQ_PROCEED;
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259 }
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260
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261
137
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262 int redirect(pblock *pb, Session *sn, Request *rq) {
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263 char *from = pblock_findval("from", pb);
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264 char *url = pblock_findval("url", pb);
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265
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266 if(!from || !url) {
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267 log_ereport(LOG_MISCONFIG, "redirect: missing parameter (from, url)");
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268 return REQ_ABORTED;
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269 }
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270
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271 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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272 if(!strcmp(uri, from)) {
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273 pblock_nvinsert("location", url, rq->srvhdrs);
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274
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275 protocol_status(sn, rq, 302, NULL);
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276 return REQ_ABORTED;
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277 }
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278
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279 return REQ_NOACTION;
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280 }
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281
136
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282 /*
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283 * provisional rewrite saf
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284 */
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285 int simple_rewrite(pblock *pb, Session *sn, Request *rq) {
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286 char *from = pblock_findval("from", pb);
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287 char *root = pblock_findval("root", pb);
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288 char *path = pblock_findval("path", pb);
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289 char *name = pblock_findval("name", pb);
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290
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291 if(!from || !path || !root) {
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292 log_ereport(LOG_MISCONFIG, "simple-rewrite: missing parameter (from, root, path)");
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293 return REQ_ABORTED;
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294 }
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295
277
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296 if(nametrans_set_vfs(pb, sn, rq)) {
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297 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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298 return REQ_ABORTED;
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299 }
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300
136
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301 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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302 cxstring u = cx_str(uri);
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303 cxstring f = cx_str(from);
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304 if(cx_strprefix(u, f)) {
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305 cxstring suf = cx_strsubs(u, f.length);
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306 cxmutstr ppath = cx_strcat(2, cx_str(path), suf);
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307
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308 request_set_path(cx_str(root), (cxstring){ppath.ptr, ppath.length}, rq->vars);
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309 free(ppath.ptr);
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310
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311 if(name) {
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312 // add object to rq->vars
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313 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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314 }
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315 }
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316
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317 return REQ_NOACTION;
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318 }

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