subversion/mod_dav_svn/reports/dated-rev.c

   1 /*
   2  * version.c: mod_dav_svn versioning provider functions for Subversion
   3  *
   4  * ====================================================================
   5  * Copyright (c) 2000-2006 CollabNet.  All rights reserved.
   6  *
   7  * This software is licensed as described in the file COPYING, which
   8  * you should have received as part of this distribution.  The terms
   9  * are also available at http://subversion.tigris.org/license-1.html.
  10  * If newer versions of this license are posted there, you may use a
  11  * newer version instead, at your option.
  12  *
  13  * This software consists of voluntary contributions made by many
  14  * individuals.  For exact contribution history, see the revision
  15  * history and logs, available at http://subversion.tigris.org/.
  16  * ====================================================================
  17  */
  18
  19 #include <apr_tables.h>
  20 #include <apr_uuid.h>
  21
  22 #include <httpd.h>
  23 #include <http_log.h>
  24 #include <mod_dav.h>
  25
  26 #include "svn_fs.h"
  27 #include "svn_xml.h"
  28 #include "svn_repos.h"
  29 #include "svn_dav.h"
  30 #include "svn_time.h"
  31 #include "svn_pools.h"
  32 #include "svn_props.h"
  33 #include "svn_dav.h"
  34 #include "svn_base64.h"
  35
  36 #include "private/svn_dav_protocol.h"
  37
  38 #include "../dav_svn.h"
  39
  40
  41 /* Respond to a S:dated-rev-report request.  The request contains a
  42  * DAV:creationdate element giving the requested date; the response
  43  * contains a DAV:version-name element giving the most recent revision
  44  * as of that date. */
  45 dav_error *
  46 dav_svn__dated_rev_report(const dav_resource *resource,
  47                           const apr_xml_doc *doc,
  48                           ap_filter_t *output)
  49 {
  50   apr_xml_elem *child;
  51   int ns;
  52   apr_time_t tm = (apr_time_t) -1;
  53   svn_revnum_t rev;
  54   apr_bucket_brigade *bb;
  55   svn_error_t *err;
  56   apr_status_t apr_err;
  57   dav_error *derr = NULL;
  58
  59   /* Find the DAV:creationdate element and get the requested time from it. */
  60   ns = dav_svn__find_ns(doc->namespaces, "DAV:");
  61   if (ns != -1)
  62     {
  63       for (child = doc->root->first_child; child != NULL; child = child->next)
  64         {
  65           if (child->ns != ns ||
  66               strcmp(child->name, SVN_DAV__CREATIONDATE) != 0)
  67             continue;
  68           /* If this fails, we'll notice below, so ignore any error for now. */
  69           svn_error_clear
  70             (svn_time_from_cstring(&tm, dav_xml_get_cdata(child,
  71                                                           resource->pool, 1),
  72                                    resource->pool));
  73         }
  74     }
  75
  76   if (tm == (apr_time_t) -1)
  77     {
  78       return dav_new_error(resource->pool, HTTP_BAD_REQUEST, 0,
  79                            "The request does not contain a valid "
  80                            "'DAV:" SVN_DAV__CREATIONDATE "' element.");
  81     }
  82
  83   /* Do the actual work of finding the revision by date. */
  84   if ((err = svn_repos_dated_revision(&rev, resource->info->repos->repos, tm,
  85                                       resource->pool)) != SVN_NO_ERROR)
  86     {
  87       svn_error_clear(err);
  88       return dav_new_error(resource->pool, HTTP_INTERNAL_SERVER_ERROR, 0,
  89                            "Could not access revision times.");
  90     }
  91
  92   bb = apr_brigade_create(resource->pool, output->c->bucket_alloc);
  93   apr_err = ap_fprintf(output, bb,
  94                        DAV_XML_HEADER DEBUG_CR
  95                        "<S:dated-rev-report xmlns:S=\"" SVN_XML_NAMESPACE "\" "
  96                        "xmlns:D=\"DAV:\">" DEBUG_CR
  97                        "<D:" SVN_DAV__VERSION_NAME ">%ld</D:"
  98                        SVN_DAV__VERSION_NAME ">""</S:dated-rev-report>", rev);
  99   if (apr_err)
 100     derr = dav_svn__convert_err(svn_error_create(apr_err, 0, NULL),
 101                                 HTTP_INTERNAL_SERVER_ERROR,
 102                                 "Error writing REPORT response.",
 103                                 resource->pool);
 104
 105   /* Flush the contents of the brigade (returning an error only if we
 106      don't already have one). */
 107   if (((apr_err = ap_fflush(output, bb))) && (! derr))
 108     derr = dav_svn__convert_err(svn_error_create(apr_err, 0, NULL),
 109                                 HTTP_INTERNAL_SERVER_ERROR,
 110                                 "Error flushing brigade.",
 111                                 resource->pool);
 112
 113   return derr;
 114 }