src/server/safs/nametrans.c

Sun, 08 May 2022 10:46:56 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 08 May 2022 10:46:56 +0200
branch
webdav
changeset 341
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parent 325
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child 366
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permissions
-rw-r--r--

add support for O_TRUNC in pg_vfs_open

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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 "../public/vfs.h"
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38
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39 static int nametrans_set_vfs(pblock *pb, Session *sn, Request *rq) {
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40 char *vfsclass = pblock_findkeyval(pb_key_vfsclass, pb);
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41 if(!vfsclass) return 0;
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42
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43 VFS *vfs = vfs_create(sn, rq, vfsclass, pb);
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44 if(!vfs) {
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45 return 1;
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46 }
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47 rq->vfs = vfs;
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48 return 0;
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49 }
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50
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51 static int nametrans_set_dav(pblock *pb, Session *sn, Request *rq) {
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52 char *davclass = pblock_findkeyval(pb_key_davclass, pb);
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53 if(!davclass) return 0;
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54
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55 WebdavBackend *dav = webdav_create(sn, rq, davclass, pb);
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56
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57 rq->davCollection = dav;
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58 return 0;
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59 }
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60
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61 /*
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62 * assign_name
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63 *
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64 * Assigns the name specified by the name parameter if the uri has the
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65 * specified prefix.
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66 *
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67 * pblock parameter:
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68 * name object name
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69 * from optional uri prefix
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70 */
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71 int assign_name(pblock *pb, Session *sn, Request *rq) {
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72 /* TODO: expression instead of simple prefix */
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73
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74 char *name = pblock_findkeyval(pb_key_name, pb);
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75 char *from = pblock_findkeyval(pb_key_from, pb);
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77 if(!name) {
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78 log_ereport(LOG_MISCONFIG, "assign-name: missing name parameter");
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79 protocol_status(sn, rq, 500, NULL);
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80 return REQ_ABORTED;
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81 }
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83 if(from) {
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84 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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85 char c;
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86 int i = 0;
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87 while((c = from[i]) != 0) {
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88 if(c != uri[i]) {
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89 return REQ_NOACTION;
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90 }
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91 i++;
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92 }
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93 }
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95 if(nametrans_set_vfs(pb, sn, rq)) {
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96 log_ereport(LOG_FAILURE, "assign-name: cannot create VFS: name=%s from=%s", name, from);
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97 return REQ_ABORTED;
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98 }
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99
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100 // add object to rq->vars
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101 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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102
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103 return REQ_NOACTION;
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104 }
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105
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106 /*
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107 * document_root
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108 *
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109 * Specifies the document root directory.
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110 *
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111 * pblock parameter:
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112 * root path to document root
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113 */
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114 int document_root(pblock *pb, Session *sn, Request *rq) {
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115 char *root = pblock_findkeyval(pb_key_root, pb);
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116 if(!root) {
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117 log_ereport(LOG_MISCONFIG, "document-root: missing root parameter");
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118 protocol_status(sn, rq, 500, NULL);
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119 return REQ_ABORTED;
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120 }
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121
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122 if(nametrans_set_vfs(pb, sn, rq)) {
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123 log_ereport(LOG_FAILURE, "document-root: cannot create VFS");
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124 return REQ_ABORTED;
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125 }
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126
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127 sstr_t root_str = sstr(root);
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128 sstr_t uri_str = sstr(pblock_findkeyval(pb_key_uri, rq->reqpb));
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129
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130 request_set_path(root_str, uri_str, rq->vars);
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131
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132 return REQ_PROCEED;
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133 }
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134
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135 /*
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136 * pfx2dir
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137 *
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138 * ...
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139 *
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140 * pblock parameter:
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141 * from prefix
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142 * dir file system directory
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143 * name (optional) object name
325
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144 * vfsclass (optional) vfs name
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145 * davclass (optional) dav backend
96
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146 *
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147 */
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148 int pfx2dir(pblock *pb, Session *sn, Request *rq) {
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149 char *from = pblock_findkeyval(pb_key_from, pb);
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150 char *dir = pblock_findkeyval(pb_key_dir, pb);
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151 char *name = pblock_findkeyval(pb_key_name, pb);
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152
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153 if(!from || !dir) {
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154 if(!from && dir) {
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155 log_ereport(LOG_MISCONFIG, "pfx2dir: missing from parameter");
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156 } else if(!dir && from) {
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157 log_ereport(LOG_MISCONFIG, "pfx2dir: missing dir parameter");
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158 } else {
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159 log_ereport(
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160 LOG_MISCONFIG,
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161 "pfx2dir: missing from and dir parameter");
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162 }
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163 protocol_status(sn, rq, 500, NULL);
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164 return REQ_ABORTED;
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165 }
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166
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167 // check prefix
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168 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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169 char fc;
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170 char uc;
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171 int i = 0;
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172 while((fc = from[i]) != 0) {
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173 uc = uri[i];
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174 if(fc != uc) {
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175 return REQ_NOACTION;
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176 }
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177 i++;
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178 }
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179
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180 // url has the specified prefix
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181
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182 uri = uri + i;
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183 if(uri[0] == '/') {
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184 uri++;
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185 }
116
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186
277
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187 if(nametrans_set_vfs(pb, sn, rq)) {
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188 log_ereport(LOG_FAILURE, "pfx2dir: cannot create VFS: from=%s dir=%s name=%s", from, dir, name);
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189 return REQ_ABORTED;
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190 }
325
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191 if(nametrans_set_dav(pb, sn, rq)) {
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192 log_ereport(LOG_FAILURE, "pfx2dir: cannot create Webdav Backend: from=%s dir=%s name=%s", from, dir, name);
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193 return REQ_ABORTED;
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194 }
277
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195
116
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196 request_set_path(sstr(dir), sstr(uri), rq->vars);
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197
96
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198 if(name) {
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199 // add object to rq->vars
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200 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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201 }
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202
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203 return REQ_PROCEED;
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204 }
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205
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206
137
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207 int redirect(pblock *pb, Session *sn, Request *rq) {
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208 char *from = pblock_findval("from", pb);
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209 char *url = pblock_findval("url", pb);
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210
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211 if(!from || !url) {
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212 log_ereport(LOG_MISCONFIG, "redirect: missing parameter (from, url)");
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213 return REQ_ABORTED;
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214 }
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215
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216 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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217 if(!strcmp(uri, from)) {
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218 pblock_nvinsert("location", url, rq->srvhdrs);
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219
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220 protocol_status(sn, rq, 302, NULL);
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221 return REQ_ABORTED;
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222 }
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223
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224 return REQ_NOACTION;
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225 }
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226
136
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227 /*
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228 * provisional rewrite saf
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229 */
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230 int simple_rewrite(pblock *pb, Session *sn, Request *rq) {
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231 char *from = pblock_findval("from", pb);
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232 char *root = pblock_findval("root", pb);
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233 char *path = pblock_findval("path", pb);
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234 char *name = pblock_findval("name", pb);
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235
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236 if(!from || !path || !root) {
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237 log_ereport(LOG_MISCONFIG, "simple-rewrite: missing parameter (from, root, path)");
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238 return REQ_ABORTED;
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239 }
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240
277
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241 if(nametrans_set_vfs(pb, sn, rq)) {
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242 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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243 return REQ_ABORTED;
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244 }
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245
136
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246 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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247 sstr_t u = sstr(uri);
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248 sstr_t f = sstr(from);
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249 if(sstrprefix(u, f)) {
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250 sstr_t suf = sstrsubs(u, f.length);
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251 sstr_t ppath = sstrcat(2, sstr(path), suf);
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252
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253 request_set_path(sstr(root), ppath, rq->vars);
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254 free(ppath.ptr);
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255
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256 if(name) {
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257 // add object to rq->vars
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258 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
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259 }
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260 }
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261
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262 return REQ_NOACTION;
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parents: 117
diff changeset
263 }

mercurial