C++ SimpleHttpResult::wasHttpError方法代码示例

static int SendRestoreIndexes (TRI_json_t const* json,
                               string& errorMsg) {
  map<string, string> headers;

  const string url = "/_api/replication/restore-indexes?force=" + string(Force ? "true" : "false");
  const string body = JsonHelper::toString(json);

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_PUT,
                                               url,
                                               body.c_str(),
                                               body.size(),
                                               headers);

  if (response == nullptr || ! response->isComplete()) {
    errorMsg = "got invalid response from server: " + Client->getErrorMessage();

    if (response != nullptr) {
      delete response;
    }

    return TRI_ERROR_INTERNAL;
  }

  if (response->wasHttpError()) {
    errorMsg = GetHttpErrorMessage(response);
    delete response;

    return TRI_ERROR_INTERNAL;
  }

  delete response;

  return TRI_ERROR_NO_ERROR;
}

static int StartBatch (string DBserver, string& errorMsg) {
  map<string, string> headers;

  const string url = "/_api/replication/batch";
  const string body = "{\"ttl\":300}";
  string urlExt;
  if (! DBserver.empty()) {
    urlExt = "?DBserver="+DBserver;
  }

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_POST,
                                               url + urlExt,
                                               body.c_str(),
                                               body.size(),
                                               headers);

  if (response == 0 || ! response->isComplete()) {
    errorMsg = "got invalid response from server: " + Client->getErrorMessage();

    if (response != 0) {
      delete response;
    }

    if (Force) {
      return TRI_ERROR_NO_ERROR;
    }
    return TRI_ERROR_INTERNAL;
  }

  if (response->wasHttpError()) {
    errorMsg = "got invalid response from server: HTTP " +
               StringUtils::itoa(response->getHttpReturnCode()) + ": " +
               response->getHttpReturnMessage();
    delete response;

    return TRI_ERROR_INTERNAL;
  }

  // convert response body to json
  TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE, response->getBody().c_str());
  delete response;

  if (json == 0) {
    errorMsg = "got malformed JSON";

    return TRI_ERROR_INTERNAL;
  }

  // look up "id" value
  const string id = JsonHelper::getStringValue(json, "id", "");

  TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);

  BatchId = StringUtils::uint64(id);

  return TRI_ERROR_NO_ERROR;
}

int Syncer::getMasterState (string& errorMsg) {
  map<string, string> headers;
  static const string url = BaseUrl + 
                            "/logger-state" + 
                            "?serverId=" + _localServerIdString;

  SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_GET, 
                                                url,
                                                0, 
                                                0,  
                                                headers); 

  if (response == 0 || ! response->isComplete()) {
    errorMsg = "could not connect to master at " + string(_masterInfo._endpoint) +
               ": " + _client->getErrorMessage();

    if (response != 0) {
      delete response;
    }

    return TRI_ERROR_REPLICATION_NO_RESPONSE;
  }

  int res = TRI_ERROR_NO_ERROR;

  if (response->wasHttpError()) {
    res = TRI_ERROR_REPLICATION_MASTER_ERROR;
    
    errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) + 
               ": HTTP " + StringUtils::itoa(response->getHttpReturnCode()) + 
               ": " + response->getHttpReturnMessage();
  }
  else {
    TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE, response->getBody().str().c_str());

    if (JsonHelper::isArray(json)) {
      res = handleStateResponse(json, errorMsg);

      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }
    else {
      res = TRI_ERROR_REPLICATION_INVALID_RESPONSE;

      errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) + 
        ": invalid JSON";
    }
  }

  delete response;

  return res;
}

static string GetArangoVersion () {
  map<string, string> headers;

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_GET,
                                               "/_api/version",
                                               nullptr,
                                               0,
                                               headers);

  if (response == nullptr || ! response->isComplete()) {
    if (response != nullptr) {
      delete response;
    }

    return "";
  }

  string version;

  if (response->getHttpReturnCode() == HttpResponse::OK) {
    // default value
    version = "arango";

    // convert response body to json
    TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE,
                                      response->getBody().c_str());

    if (json) {
      // look up "server" value
      const string server = JsonHelper::getStringValue(json, "server", "");

      // "server" value is a string and content is "arango"
      if (server == "arango") {
        // look up "version" value
        version = JsonHelper::getStringValue(json, "version", "");
      }

      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }
  }
  else {
    if (response->wasHttpError()) {
      Client->setErrorMessage(GetHttpErrorMessage(response), false);
    }

    Connection->disconnect();
  }

  delete response;

  return version;
}

int InitialSyncer::sendExtendBatch () {
  if (_batchId == 0) {
    return TRI_ERROR_NO_ERROR;
  }

  double now = TRI_microtime();

  if (now <= _batchUpdateTime + _batchTtl - 60) {
    // no need to extend the batch yet
    return TRI_ERROR_NO_ERROR;
  }

  map<string, string> const headers;

  string const url = BaseUrl + "/batch/" + StringUtils::itoa(_batchId);
  string const body = "{\"ttl\":" + StringUtils::itoa(_batchTtl) + "}";

  // send request
  string const progress = "send batch start command to url " + url;
  setProgress(progress);

  SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_PUT,
                                                url,
                                                body.c_str(),
                                                body.size(),
                                                headers);

  if (response == nullptr || ! response->isComplete()) {
    if (response != nullptr) {
      delete response;
    }

    return TRI_ERROR_REPLICATION_NO_RESPONSE;
  }

  int res = TRI_ERROR_NO_ERROR;

  if (response->wasHttpError()) {
    res = TRI_ERROR_REPLICATION_MASTER_ERROR;
  }
  else {
    _batchUpdateTime = TRI_microtime();
  }

  delete response;

  return res;
}

static void FlushWal () {
  map<string, string> headers;
  const string url = "/_admin/wal/flush?waitForSync=true&waitForCollector=true";

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_PUT,
                                               url,
                                               nullptr,
                                               0,
                                               headers);

  if (response == nullptr || ! response->isComplete() || response->wasHttpError()) {
    cerr << "got invalid response from server: " + Client->getErrorMessage() << endl;
  }

  if (response != nullptr) {
    delete response;
  }
}

static bool GetArangoIsCluster () {
  map<string, string> headers;
  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_GET,
                                        "/_admin/server/role",
                                        "",
                                        0,
                                        headers);

  if (response == nullptr || ! response->isComplete()) {
    if (response != nullptr) {
      delete response;
    }

    return false;
  }

  string role = "UNDEFINED";

  if (response->getHttpReturnCode() == HttpResponse::OK) {
    // convert response body to json
    TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE,
                                      response->getBody().c_str());

    if (json != nullptr) {
      // look up "server" value
      role = JsonHelper::getStringValue(json, "role", "UNDEFINED");

      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }
  }
  else {
    if (response->wasHttpError()) {
      Client->setErrorMessage(GetHttpErrorMessage(response), false);
    }

    Connection->disconnect();
  }

  delete response;

  return role == "COORDINATOR";
}

int InitialSyncer::sendFinishBatch () {
  if (_batchId == 0) {
    return TRI_ERROR_NO_ERROR;
  }

  map<string, string> const headers;
  string const url = BaseUrl + "/batch/" + StringUtils::itoa(_batchId);

  // send request
  string const progress = "send batch finish command to url " + url;
  setProgress(progress);

  SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_DELETE,
                                                url,
                                                nullptr,
                                                0,
                                                headers);

  if (response == nullptr || ! response->isComplete()) {
    if (response != nullptr) {
      delete response;
    }

    return TRI_ERROR_REPLICATION_NO_RESPONSE;
  }

  int res = TRI_ERROR_NO_ERROR;

  if (response->wasHttpError()) {
    res = TRI_ERROR_REPLICATION_MASTER_ERROR;
  }
  else {
    _batchId = 0;
    _batchUpdateTime = 0;
  }

  delete response;

  return res;
}

static int SendRestoreData (string const& cid,
                            string const& cname,
                            char const* buffer,
                            size_t bufferSize,
                            string& errorMsg) {
  map<string, string> headers;

  const string url = "/_api/replication/restore-data?collection=" + 
                     StringUtils::urlEncode(cname) +
                     "&recycleIds=" + (RecycleIds ? "true" : "false") + 
                     "&force=" + (Force ? "true" : "false");

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_PUT, 
                                               url,
                                               buffer, 
                                               bufferSize,  
                                               headers); 


  if (response == 0 || ! response->isComplete()) {
    errorMsg = "got invalid response from server: " + Client->getErrorMessage();

    if (response != 0) {
      delete response;
    }

    return TRI_ERROR_INTERNAL;
  }

  if (response->wasHttpError()) {
    errorMsg = GetHttpErrorMessage(response);
    delete response;

    return TRI_ERROR_INTERNAL;
  }
    
  delete response;

  return TRI_ERROR_NO_ERROR;
}

static int RunDump (string& errorMsg) {
  map<string, string> headers;

  const string url = "/_api/replication/inventory?includeSystem=" + 
                     string(IncludeSystemCollections ? "true" : "false");

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_GET, 
                                               url,
                                               0, 
                                               0,  
                                               headers); 

  if (response == 0 || ! response->isComplete()) {
    errorMsg = "got invalid response from server: " + Client->getErrorMessage();

    if (response != 0) {
      delete response;
    }

    return TRI_ERROR_INTERNAL;
  }
 
  if (response->wasHttpError()) {
    errorMsg = "got invalid response from server: HTTP " + 
               StringUtils::itoa(response->getHttpReturnCode()) + ": " +
               response->getHttpReturnMessage();
    delete response;
    
    return TRI_ERROR_INTERNAL;
  }


  const string& data = response->getBody().str();

    
  TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE, data.c_str());

  delete response;

  if (! JsonHelper::isArray(json)) {
    if (json != 0) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }

    errorMsg = "got malformed JSON response from server";

    return TRI_ERROR_INTERNAL;
  }

  TRI_json_t const* collections = JsonHelper::getArrayElement(json, "collections");

  if (! JsonHelper::isList(collections)) {
    TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    errorMsg = "got malformed JSON response from server";

    return TRI_ERROR_INTERNAL;
  }

  const string tickString = JsonHelper::getStringValue(json, "tick", "");

  if (tickString == "") {
    TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    errorMsg = "got malformed JSON response from server";

    return TRI_ERROR_INTERNAL;
  }

  cout << "Last tick provided by server is: " << tickString << endl;

  // read the server's max tick value
  uint64_t maxTick = StringUtils::uint64(tickString);

  // check if the user specific a max tick value
  if (TickEnd > 0 && maxTick > TickEnd) {
    maxTick = TickEnd;
  }

  // create a lookup table for collections
  map<string, bool> restrictList;
  for (size_t i = 0; i < Collections.size(); ++i) {
    restrictList.insert(pair<string, bool>(Collections[i], true));
  }

  // iterate over collections
  const size_t n = collections->_value._objects._length;

  for (size_t i = 0; i < n; ++i) {
    TRI_json_t const* collection = (TRI_json_t const*) TRI_AtVector(&collections->_value._objects, i);

    if (! JsonHelper::isArray(collection)) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
      errorMsg = "got malformed JSON response from server";

      return TRI_ERROR_INTERNAL;
    }

    TRI_json_t const* parameters = JsonHelper::getArrayElement(collection, "parameters");

    if (! JsonHelper::isArray(parameters)) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
//.........这里部分代码省略.........

static int DumpCollection (int fd,
                           const string& cid,
                           const string& name,
                           TRI_json_t const* parameters,
                           const uint64_t maxTick,
                           string& errorMsg) {

  const string baseUrl = "/_api/replication/dump?collection=" + cid + 
                         "&chunkSize=" + StringUtils::itoa(ChunkSize) +
                         "&ticks=false&translateIds=true";
    
  map<string, string> headers;

  uint64_t fromTick = TickStart;

  while (1) {
    string url = baseUrl + "&from=" + StringUtils::itoa(fromTick);
  
    if (maxTick > 0) {
      url += "&to=" + StringUtils::itoa(maxTick);
    }

    Stats._totalBatches++;

    SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_GET, 
                                                 url,
                                                 0, 
                                                 0,  
                                                 headers); 

    if (response == 0 || ! response->isComplete()) {
      errorMsg = "got invalid response from server: " + Client->getErrorMessage();

      if (response != 0) {
        delete response;
      }

      return TRI_ERROR_INTERNAL;
    }

    if (response->wasHttpError()) {
      errorMsg = GetHttpErrorMessage(response);
      delete response;

      return TRI_ERROR_INTERNAL;
    }

    int res;
    bool checkMore = false;
    bool found;
    uint64_t tick;

    // TODO: fix hard-coded headers
    string header = response->getHeaderField("x-arango-replication-checkmore", found);

    if (found) {
      checkMore = StringUtils::boolean(header);
      res = TRI_ERROR_NO_ERROR;
   
      if (checkMore) { 
        // TODO: fix hard-coded headers
        header = response->getHeaderField("x-arango-replication-lastincluded", found);

        if (found) {
          tick = StringUtils::uint64(header);

          if (tick > fromTick) {
            fromTick = tick;
          }
          else {
            // we got the same tick again, this indicates we're at the end
            checkMore = false;
          }
        }
      }
    }

    if (! found) {
      errorMsg = "got invalid response server: required header is missing";
      res = TRI_ERROR_REPLICATION_INVALID_RESPONSE;
    }
      
    if (res == TRI_ERROR_NO_ERROR) {
      stringstream& responseBody = response->getBody();
      const string body = responseBody.str();
      const size_t len = body.size();
     
      if (! TRI_WritePointer(fd, body.c_str(), len)) {
        res = TRI_ERROR_CANNOT_WRITE_FILE;
      }
      else {
        Stats._totalWritten += (uint64_t) len;
      }
    }

    delete response;

    if (res != TRI_ERROR_NO_ERROR) {
      return res;
    }
//.........这里部分代码省略.........

int InitialSyncer::handleCollectionDump (string const& cid,
                                         TRI_transaction_collection_t* trxCollection,
                                         string const& collectionName,
                                         TRI_voc_tick_t maxTick,
                                         string& errorMsg) {

  std::string appendix;

  if (_hasFlushed) {
    appendix = "&flush=false";
  }
  else {
    // only flush WAL once
    appendix = "&flush=true";
    _hasFlushed = true;
  }

  string const baseUrl = BaseUrl +
                         "/dump?collection=" + cid +
                         "&chunkSize=" + _chunkSize + 
                         appendix;

  map<string, string> headers;

  TRI_voc_tick_t fromTick = 0;
  int batch = 1;

  while (1) {
    sendExtendBatch();

    string url = baseUrl + "&from=" + StringUtils::itoa(fromTick);

    if (maxTick > 0) {
      url += "&to=" + StringUtils::itoa(maxTick);
    }

    url += "&serverId=" + _localServerIdString;

    // send request
    string const progress = "fetching master collection dump for collection '" + collectionName +
                            "', id " + cid + ", batch " + StringUtils::itoa(batch);

    setProgress(progress.c_str());

    SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_GET,
                                                  url,
                                                  nullptr,
                                                  0,
                                                  headers);

    if (response == nullptr || ! response->isComplete()) {
      errorMsg = "could not connect to master at " + string(_masterInfo._endpoint) +
                 ": " + _client->getErrorMessage();

      if (response != nullptr) {
        delete response;
      }

      return TRI_ERROR_REPLICATION_NO_RESPONSE;
    }

    if (response->wasHttpError()) {
      errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) +
                 ": HTTP " + StringUtils::itoa(response->getHttpReturnCode()) +
                 ": " + response->getHttpReturnMessage();

      delete response;

      return TRI_ERROR_REPLICATION_MASTER_ERROR;
    }

    int res = TRI_ERROR_NO_ERROR;  // Just to please the compiler
    bool checkMore = false;
    bool found;
    TRI_voc_tick_t tick;

    string header = response->getHeaderField(TRI_REPLICATION_HEADER_CHECKMORE, found);
    if (found) {
      checkMore = StringUtils::boolean(header);
      res = TRI_ERROR_NO_ERROR;

      if (checkMore) {
        header = response->getHeaderField(TRI_REPLICATION_HEADER_LASTINCLUDED, found);
        if (found) {
          tick = StringUtils::uint64(header);

          if (tick > fromTick) {
            fromTick = tick;
          }
          else {
            // we got the same tick again, this indicates we're at the end
            checkMore = false;
          }
        }
      }
    }

    if (! found) {
      errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) +
                 ": required header is missing";
//.........这里部分代码省略.........

int InitialSyncer::sendStartBatch (string& errorMsg) {
  _batchId = 0;

  map<string, string> const headers;

  string const url = BaseUrl + "/batch";
  string const body = "{\"ttl\":" + StringUtils::itoa(_batchTtl) + "}";

  // send request
  string const progress = "send batch start command to url " + url;
  setProgress(progress);

  SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_POST,
                                                url,
                                                body.c_str(),
                                                body.size(),
                                                headers);

  if (response == nullptr || ! response->isComplete()) {
    errorMsg = "could not connect to master at " + string(_masterInfo._endpoint) +
               ": " + _client->getErrorMessage();

    if (response != nullptr) {
      delete response;
    }

    return TRI_ERROR_REPLICATION_NO_RESPONSE;
  }

  int res = TRI_ERROR_NO_ERROR;

  if (response->wasHttpError()) {
    res = TRI_ERROR_REPLICATION_MASTER_ERROR;

    errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) +
               ": HTTP " + StringUtils::itoa(response->getHttpReturnCode()) +
               ": " + response->getHttpReturnMessage();
  }

  if (res == TRI_ERROR_NO_ERROR) {
    TRI_json_t* json = TRI_JsonString(TRI_CORE_MEM_ZONE,
                                      response->getBody().c_str());

    if (json == nullptr) {
      res = TRI_ERROR_REPLICATION_INVALID_RESPONSE;
    }
    else {
      string const id = JsonHelper::getStringValue(json, "id", "");

      if (id.empty()) {
        res = TRI_ERROR_REPLICATION_INVALID_RESPONSE;
      }
      else {
        _batchId = StringUtils::uint64(id);
        _batchUpdateTime = TRI_microtime();
      }

      TRI_FreeJson(TRI_CORE_MEM_ZONE, json);
    }
  }

  delete response;

  return res;
}

int InitialSyncer::run (string& errorMsg) {
  if (_client == nullptr || 
      _connection == nullptr || 
      _endpoint == nullptr) {
    errorMsg = "invalid endpoint";

    return TRI_ERROR_INTERNAL;
  }

  setProgress("fetching master state");

  int res = getMasterState(errorMsg);

  if (res != TRI_ERROR_NO_ERROR) {
    return res;
  }

  res = sendStartBatch(errorMsg);

  if (res != TRI_ERROR_NO_ERROR) {
    return res;
  }


  map<string, string> headers;
  string url = BaseUrl + "/inventory?serverId=" + _localServerIdString;
  if (_includeSystem) {
    url += "&includeSystem=true";
  }

  // send request
  string const progress = "fetching master inventory from " + url;
  setProgress(progress);

  SimpleHttpResult* response = _client->request(HttpRequest::HTTP_REQUEST_GET,
                                                url,
                                                nullptr,
                                                0,
                                                headers);

  if (response == nullptr || ! response->isComplete()) {
    errorMsg = "could not connect to master at " + string(_masterInfo._endpoint) +
               ": " + _client->getErrorMessage();

    if (response != nullptr) {
      delete response;
    }

    sendFinishBatch();

    return TRI_ERROR_REPLICATION_NO_RESPONSE;
  }

  if (response->wasHttpError()) {
    res = TRI_ERROR_REPLICATION_MASTER_ERROR;

    errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) +
               ": HTTP " + StringUtils::itoa(response->getHttpReturnCode()) +
               ": " + response->getHttpReturnMessage();
  }
  else {
    TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE,
                                      response->getBody().c_str());

    if (JsonHelper::isObject(json)) {
      res = handleInventoryResponse(json, errorMsg);

      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }
    else {
      res = TRI_ERROR_REPLICATION_INVALID_RESPONSE;

      errorMsg = "got invalid response from master at " + string(_masterInfo._endpoint) +
        ": invalid JSON";
    }
  }

  delete response;

  sendFinishBatch();

  return res;
}

static int RunClusterDump (string& errorMsg) {
  int res;

  map<string, string> headers;

  const string url = "/_api/replication/clusterInventory?includeSystem=" +
                     string(IncludeSystemCollections ? "true" : "false");

  SimpleHttpResult* response = Client->request(HttpRequest::HTTP_REQUEST_GET,
                                               url,
                                               0,
                                               0,
                                               headers);

  if (response == 0 || ! response->isComplete()) {
    errorMsg = "got invalid response from server: " + Client->getErrorMessage();

    if (response != 0) {
      delete response;
    }

    return TRI_ERROR_INTERNAL;
  }

  if (response->wasHttpError()) {
    errorMsg = "got invalid response from server: HTTP " +
               StringUtils::itoa(response->getHttpReturnCode()) + ": " +
               response->getHttpReturnMessage();
    delete response;

    return TRI_ERROR_INTERNAL;
  }


  const StringBuffer& data = response->getBody();


  TRI_json_t* json = TRI_JsonString(TRI_UNKNOWN_MEM_ZONE, data.c_str());

  delete response;

  if (! JsonHelper::isArray(json)) {
    if (json != 0) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    }

    errorMsg = "got malformed JSON response from server";

    return TRI_ERROR_INTERNAL;
  }

  TRI_json_t const* collections = JsonHelper::getArrayElement(json, "collections");

  if (! JsonHelper::isList(collections)) {
    TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
    errorMsg = "got malformed JSON response from server";

    return TRI_ERROR_INTERNAL;
  }

  // create a lookup table for collections
  map<string, bool> restrictList;
  for (size_t i = 0; i < Collections.size(); ++i) {
    restrictList.insert(pair<string, bool>(Collections[i], true));
  }

  // iterate over collections
  const size_t n = collections->_value._objects._length;

  for (size_t i = 0; i < n; ++i) {
    TRI_json_t const* collection = (TRI_json_t const*) TRI_AtVector(&collections->_value._objects, i);

    if (! JsonHelper::isArray(collection)) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
      errorMsg = "got malformed JSON response from server";

      return TRI_ERROR_INTERNAL;
    }

    TRI_json_t const* parameters = JsonHelper::getArrayElement(collection, "parameters");

    if (! JsonHelper::isArray(parameters)) {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
      errorMsg = "got malformed JSON response from server";

      return TRI_ERROR_INTERNAL;
    }

    const string id    = JsonHelper::getStringValue(parameters, "id", "");
    const string name  = JsonHelper::getStringValue(parameters, "name", "");
    const bool deleted = JsonHelper::getBooleanValue(parameters, "deleted", false);

    if (id == "" || name == "") {
      TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
      errorMsg = "got malformed JSON response from server";

      return TRI_ERROR_INTERNAL;
    }

    if (deleted) {
//.........这里部分代码省略.........