contrib/subversion/subversion/libsvn_ra_serf/getdate.c

   1 /*
   2  * getdate.c :  entry point for get_dated_revision for ra_serf
   3  *
   4  * ====================================================================
   5  *    Licensed to the Apache Software Foundation (ASF) under one
   6  *    or more contributor license agreements.  See the NOTICE file
   7  *    distributed with this work for additional information
   8  *    regarding copyright ownership.  The ASF licenses this file
   9  *    to you under the Apache License, Version 2.0 (the
  10  *    "License"); you may not use this file except in compliance
  11  *    with the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  *    Unless required by applicable law or agreed to in writing,
  16  *    software distributed under the License is distributed on an
  17  *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  18  *    KIND, either express or implied.  See the License for the
  19  *    specific language governing permissions and limitations
  20  *    under the License.
  21  * ====================================================================
  22  */
  23
  24
  25 \f
  26 #include <apr_uri.h>
  27 #include <serf.h>
  28
  29 #include "svn_pools.h"
  30 #include "svn_ra.h"
  31 #include "svn_time.h"
  32 #include "svn_xml.h"
  33
  34 #include "private/svn_dav_protocol.h"
  35
  36 #include "svn_private_config.h"
  37
  38 #include "../libsvn_ra/ra_loader.h"
  39
  40 #include "ra_serf.h"
  41
  42 \f
  43 /*
  44  * This enum represents the current state of our XML parsing for a REPORT.
  45  */
  46 enum date_state_e {
  47   INITIAL = 0,
  48   REPORT,
  49   VERSION_NAME
  50 };
  51
  52
  53 typedef struct date_context_t {
  54   /* The time asked about. */
  55   apr_time_t time;
  56
  57   /* What was the youngest revision at that time? */
  58   svn_revnum_t *revision;
  59
  60 } date_context_t;
  61
  62 #define D_ "DAV:"
  63 #define S_ SVN_XML_NAMESPACE
  64 static const svn_ra_serf__xml_transition_t date_ttable[] = {
  65   { INITIAL, S_, "dated-rev-report", REPORT,
  66     FALSE, { NULL }, FALSE },
  67
  68   { REPORT, D_, SVN_DAV__VERSION_NAME, VERSION_NAME,
  69     TRUE, { NULL }, TRUE },
  70
  71   { 0 }
  72 };
  73
  74
  75 /* Conforms to svn_ra_serf__xml_closed_t  */
  76 static svn_error_t *
  77 date_closed(svn_ra_serf__xml_estate_t *xes,
  78             void *baton,
  79             int leaving_state,
  80             const svn_string_t *cdata,
  81             apr_hash_t *attrs,
  82             apr_pool_t *scratch_pool)
  83 {
  84   date_context_t *date_ctx = baton;
  85
  86   SVN_ERR_ASSERT(leaving_state == VERSION_NAME);
  87   SVN_ERR_ASSERT(cdata != NULL);
  88
  89   *date_ctx->revision = SVN_STR_TO_REV(cdata->data);
  90
  91   return SVN_NO_ERROR;
  92 }
  93
  94
  95 /* Implements svn_ra_serf__request_body_delegate_t */
  96 static svn_error_t *
  97 create_getdate_body(serf_bucket_t **body_bkt,
  98                     void *baton,
  99                     serf_bucket_alloc_t *alloc,
 100                     apr_pool_t *pool)
 101 {
 102   serf_bucket_t *buckets;
 103   date_context_t *date_ctx = baton;
 104
 105   buckets = serf_bucket_aggregate_create(alloc);
 106
 107   svn_ra_serf__add_open_tag_buckets(buckets, alloc, "S:dated-rev-report",
 108                                     "xmlns:S", SVN_XML_NAMESPACE,
 109                                     "xmlns:D", "DAV:",
 110                                     NULL);
 111
 112   svn_ra_serf__add_tag_buckets(buckets,
 113                                "D:" SVN_DAV__CREATIONDATE,
 114                                svn_time_to_cstring(date_ctx->time, pool),
 115                                alloc);
 116
 117   svn_ra_serf__add_close_tag_buckets(buckets, alloc, "S:dated-rev-report");
 118
 119   *body_bkt = buckets;
 120   return SVN_NO_ERROR;
 121 }
 122
 123 svn_error_t *
 124 svn_ra_serf__get_dated_revision(svn_ra_session_t *ra_session,
 125                                 svn_revnum_t *revision,
 126                                 apr_time_t tm,
 127                                 apr_pool_t *pool)
 128 {
 129   date_context_t *date_ctx;
 130   svn_ra_serf__session_t *session = ra_session->priv;
 131   svn_ra_serf__handler_t *handler;
 132   svn_ra_serf__xml_context_t *xmlctx;
 133   const char *report_target;
 134   svn_error_t *err;
 135
 136   date_ctx = apr_palloc(pool, sizeof(*date_ctx));
 137   date_ctx->time = tm;
 138   date_ctx->revision = revision;
 139
 140   SVN_ERR(svn_ra_serf__report_resource(&report_target, session, NULL, pool));
 141
 142   xmlctx = svn_ra_serf__xml_context_create(date_ttable,
 143                                            NULL, date_closed, NULL,
 144                                            date_ctx,
 145                                            pool);
 146   handler = svn_ra_serf__create_expat_handler(xmlctx, pool);
 147
 148   handler->method = "REPORT";
 149   handler->path = report_target;
 150   handler->body_type = "text/xml";
 151   handler->conn = session->conns[0];
 152   handler->session = session;
 153
 154   handler->body_delegate = create_getdate_body;
 155   handler->body_delegate_baton = date_ctx;
 156
 157   *date_ctx->revision = SVN_INVALID_REVNUM;
 158
 159   err = svn_ra_serf__context_run_one(handler, pool);
 160
 161   SVN_ERR(svn_error_compose_create(
 162               svn_ra_serf__error_on_status(handler->sline,
 163                                            report_target,
 164                                            handler->location),
 165               err));
 166
 167   SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(*revision));
 168
 169   return SVN_NO_ERROR;
 170 }