subversion/libsvn_ra_neon/options.c

   1 /*
   2  * options.c :  routines for performing OPTIONS server requests
   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
  20 \f
  21 #include <apr_pools.h>
  22
  23 #include "svn_error.h"
  24
  25 #include "svn_private_config.h"
  26
  27 #include "ra_neon.h"
  28
  29
  30 static const svn_ra_neon__xml_elm_t options_elements[] =
  31 {
  32   { "DAV:", "activity-collection-set", ELEM_activity_coll_set, 0 },
  33   { "DAV:", "href", ELEM_href, SVN_RA_NEON__XML_CDATA },
  34   { "DAV:", "options-response", ELEM_options_response, 0 },
  35
  36   { NULL }
  37 };
  38
  39 typedef struct {
  40   /*WARNING: WANT_CDATA should stay the first element in the baton:
  41     svn_ra_neon__xml_collect_cdata() assumes the baton starts with a stringbuf.
  42   */
  43   svn_stringbuf_t *want_cdata;
  44   svn_stringbuf_t *cdata;
  45   apr_pool_t *pool;
  46   svn_string_t *activity_coll;
  47 } options_ctx_t;
  48
  49
  50
  51 static int
  52 validate_element(svn_ra_neon__xml_elmid parent, svn_ra_neon__xml_elmid child)
  53 {
  54   switch (parent)
  55     {
  56     case ELEM_root:
  57       if (child == ELEM_options_response)
  58         return child;
  59       else
  60         return SVN_RA_NEON__XML_INVALID;
  61
  62     case ELEM_options_response:
  63       if (child == ELEM_activity_coll_set)
  64         return child;
  65       else
  66         return SVN_RA_NEON__XML_DECLINE; /* not concerned with other response */
  67
  68     case ELEM_activity_coll_set:
  69       if (child == ELEM_href)
  70         return child;
  71       else
  72         return SVN_RA_NEON__XML_DECLINE; /* not concerned with unknown crud */
  73
  74     default:
  75       return SVN_RA_NEON__XML_DECLINE;
  76     }
  77
  78   /* NOTREACHED */
  79 }
  80
  81 static svn_error_t *
  82 start_element(int *elem, void *baton, int parent,
  83               const char *nspace, const char *name, const char **atts)
  84 {
  85   options_ctx_t *oc = baton;
  86   const svn_ra_neon__xml_elm_t *elm
  87     = svn_ra_neon__lookup_xml_elem(options_elements, nspace, name);
  88
  89   *elem = elm ? validate_element(parent, elm->id) : SVN_RA_NEON__XML_DECLINE;
  90   if (*elem < 1) /* Not a valid element */
  91     return SVN_NO_ERROR;
  92
  93   if (elm->id == ELEM_href)
  94     oc->want_cdata = oc->cdata;
  95   else
  96     oc->want_cdata = NULL;
  97
  98   return SVN_NO_ERROR;
  99 }
 100
 101 static svn_error_t *
 102 end_element(void *baton, int state,
 103             const char *nspace, const char *name)
 104 {
 105   options_ctx_t *oc = baton;
 106
 107   if (state == ELEM_href)
 108     oc->activity_coll = svn_string_create_from_buf(oc->cdata, oc->pool);
 109
 110   return SVN_NO_ERROR;
 111 }
 112
 113 svn_error_t *
 114 svn_ra_neon__get_activity_collection(const svn_string_t **activity_coll,
 115                                      svn_ra_neon__session_t *ras,
 116                                      const char *url,
 117                                      apr_pool_t *pool)
 118 {
 119   options_ctx_t oc = { 0 };
 120
 121 #if 0
 122   ne_add_response_header_handler(req, "dav",
 123                                  ne_duplicate_header, &dav_header);
 124 #endif
 125
 126   oc.pool = pool;
 127   oc.cdata = svn_stringbuf_create("", pool);
 128
 129   SVN_ERR(svn_ra_neon__parsed_request(ras, "OPTIONS", url,
 130                                       "<?xml version=\"1.0\" "
 131                                       "encoding=\"utf-8\"?>"
 132                                       "<D:options xmlns:D=\"DAV:\">"
 133                                       "<D:activity-collection-set/>"
 134                                       "</D:options>", 0, NULL,
 135                                       start_element,
 136                                       svn_ra_neon__xml_collect_cdata,
 137                                       end_element, &oc,
 138                                       NULL, NULL, FALSE, pool));
 139
 140   if (oc.activity_coll == NULL)
 141     {
 142       /* ### error */
 143       return svn_error_create(SVN_ERR_RA_DAV_OPTIONS_REQ_FAILED, NULL,
 144                               _("The OPTIONS response did not include the "
 145                                 "requested activity-collection-set; "
 146                                 "this often means that "
 147                                 "the URL is not WebDAV-enabled"));
 148     }
 149
 150   *activity_coll = oc.activity_coll;
 151
 152   return SVN_NO_ERROR;
 153 }