mirror of https://gitee.com/bigwinds/arangodb
239 lines
8.3 KiB
C++
239 lines
8.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief default handler for error handling and json in-/output
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2011-2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "RestBaseHandler.h"
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#include "BasicsC/strings.h"
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#include "Basics/StringUtils.h"
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#include "Logger/Logger.h"
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#include "Rest/HttpRequest.h"
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#include "Rest/HttpResponse.h"
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#include "ResultGenerator/OutputGenerator.h"
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#include "Variant/VariantArray.h"
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#include "Variant/VariantBoolean.h"
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#include "Variant/VariantInt32.h"
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#include "Variant/VariantObject.h"
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#include "Variant/VariantString.h"
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using namespace std;
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using namespace triagens::basics;
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using namespace triagens::rest;
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using namespace triagens::admin;
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup RestServer
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief constructor
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////////////////////////////////////////////////////////////////////////////////
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RestBaseHandler::RestBaseHandler (HttpRequest* request)
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: HttpHandler(request) {
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bool found;
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if (request->requestType() == HttpRequest::HTTP_REQUEST_GET) {
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char const* method = request->value("__METHOD__", found);
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if (found) {
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if (TRI_CaseEqualString(method, "put")) {
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LOGGER_TRACE << "forcing method 'put'";
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request->setRequestType(HttpRequest::HTTP_REQUEST_PUT);
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}
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else if (TRI_CaseEqualString(method, "post")) {
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LOGGER_TRACE << "forcing method 'post'";
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request->setRequestType(HttpRequest::HTTP_REQUEST_POST);
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}
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else if (TRI_CaseEqualString(method, "delete")) {
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LOGGER_TRACE << "forcing method 'delete'";
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request->setRequestType(HttpRequest::HTTP_REQUEST_DELETE);
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}
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}
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char const* body = request->value("__BODY__", found);
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if (found) {
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LOGGER_TRACE << "forcing body";
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request->setBody(body, strlen(body));
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- HttpHandler methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup RestServer
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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void RestBaseHandler::handleError (TriagensError const& error) {
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if (_response != 0) {
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delete _response;
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}
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generateError(HttpResponse::SERVER_ERROR,
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TRI_ERROR_INTERNAL,
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DIAGNOSTIC_INFORMATION(error));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup RestServer
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates a result from JSON
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////////////////////////////////////////////////////////////////////////////////
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void RestBaseHandler::generateResult (TRI_json_t* json) {
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_response = new HttpResponse(HttpResponse::OK);
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_response->setContentType("application/json; charset=utf-8");
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int res = TRI_StringifyJson(_response->body().stringBuffer(), json);
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if (res != TRI_ERROR_NO_ERROR) {
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delete _response;
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generateError(HttpResponse::SERVER_ERROR,
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TRI_ERROR_INTERNAL,
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"cannot generate output");
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates a result
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////////////////////////////////////////////////////////////////////////////////
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void RestBaseHandler::generateResult (VariantObject* result) {
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_response = new HttpResponse(HttpResponse::OK);
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string contentType;
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bool ok = OutputGenerator::output(selectResultGenerator(_request), _response->body(), result, contentType);
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if (ok) {
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_response->setContentType(contentType);
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}
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else {
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delete _response;
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generateError(HttpResponse::SERVER_ERROR,
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TRI_ERROR_INTERNAL,
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"cannot generate output");
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}
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delete result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error
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////////////////////////////////////////////////////////////////////////////////
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void RestBaseHandler::generateError (HttpResponse::HttpResponseCode code, int errorCode) {
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char const* message = TRI_errno_string(errorCode);
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if (message) {
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generateError(code, errorCode, string(message));
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}
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else {
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generateError(code, errorCode, string("unknown error"));
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error
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////////////////////////////////////////////////////////////////////////////////
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void RestBaseHandler::generateError (HttpResponse::HttpResponseCode code, int errorCode, string const& message) {
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_response = new HttpResponse(code);
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VariantArray* result = new VariantArray();
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result->add("error", new VariantBoolean(true));
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result->add("code", new VariantInt32((int32_t) code));
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result->add("errorNum", new VariantInt32((int32_t) errorCode));
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result->add("errorMessage", new VariantString(message));
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string contentType;
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bool ok = OutputGenerator::output(selectResultGenerator(_request), _response->body(), result, contentType);
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if (ok) {
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_response->setContentType(contentType);
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}
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else {
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_response->body().appendText("{ \"error\" : true, \"errorMessage\" : \"" );
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_response->body().appendText(StringUtils::escapeUnicode(message));
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_response->body().appendText("\", \"code\" : ");
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_response->body().appendInteger(code);
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_response->body().appendText("\", \"errorNum\" : ");
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_response->body().appendInteger(errorCode);
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_response->body().appendText("}");
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_response->setContentType("application/json; charset=utf-8");
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}
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delete result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief selects an output format
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////////////////////////////////////////////////////////////////////////////////
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string RestBaseHandler::selectResultGenerator (HttpRequest* request) {
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string format = request->header("accept");
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if (format.empty()) {
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return "application/json; charset=utf-8";
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}
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return format;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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