mirror of https://gitee.com/bigwinds/arangodb
173 lines
6.4 KiB
C++
173 lines
6.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Dr. Frank Celler
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "RestBaseHandler.h"
|
|
#include "Basics/StringUtils.h"
|
|
#include "Basics/VPackStringBufferAdapter.h"
|
|
#include "Rest/HttpRequest.h"
|
|
#include "Rest/HttpResponse.h"
|
|
#include "Utils/TransactionContext.h"
|
|
|
|
#include <velocypack/Builder.h>
|
|
#include <velocypack/Dumper.h>
|
|
#include <velocypack/Options.h>
|
|
#include <velocypack/velocypack-aliases.h>
|
|
|
|
using namespace arangodb;
|
|
using namespace arangodb::basics;
|
|
using namespace arangodb::rest;
|
|
|
|
RestBaseHandler::RestBaseHandler(HttpRequest* request) : HttpHandler(request) {}
|
|
|
|
void RestBaseHandler::handleError(Exception const& ex) {
|
|
generateError(GeneralResponse::responseCode(ex.code()), ex.code(), ex.what());
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates a result from VelocyPack
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateResult(GeneralResponse::ResponseCode code,
|
|
VPackSlice const& slice) {
|
|
|
|
createResponse(code);
|
|
writeResult(slice, VPackOptions::Defaults);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates a result from VelocyPack
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateResult(GeneralResponse::ResponseCode code,
|
|
VPackSlice const& slice,
|
|
std::shared_ptr<TransactionContext> context) {
|
|
createResponse(code);
|
|
writeResult(slice,*(context->getVPackOptions()));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates an error
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateError(GeneralResponse::ResponseCode code,
|
|
int errorCode) {
|
|
char const* message = TRI_errno_string(errorCode);
|
|
|
|
if (message != nullptr) {
|
|
generateError(code, errorCode, std::string(message));
|
|
} else {
|
|
generateError(code, errorCode, std::string("unknown error"));
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates an error
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateError(GeneralResponse::ResponseCode code,
|
|
int errorCode, std::string const& message) {
|
|
createResponse(code);
|
|
|
|
VPackBuilder builder;
|
|
try {
|
|
builder.add(VPackValue(VPackValueType::Object));
|
|
builder.add("error", VPackValue(true));
|
|
if (message.empty()) {
|
|
// prevent empty error messages
|
|
builder.add("errorMessage", VPackValue(TRI_errno_string(errorCode)));
|
|
} else {
|
|
builder.add("errorMessage", VPackValue(message));
|
|
}
|
|
builder.add("code", VPackValue(static_cast<int>(code)));
|
|
builder.add("errorNum", VPackValue(errorCode));
|
|
builder.close();
|
|
|
|
writeResult(builder.slice(), VPackOptions::Defaults);
|
|
} catch (...) {
|
|
// Building the error response failed
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates an OUT_OF_MEMORY error
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateOOMError() {
|
|
generateError(GeneralResponse::ResponseCode::SERVER_ERROR, TRI_ERROR_OUT_OF_MEMORY);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief generates a cancel message
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::generateCanceled() {
|
|
return generateError(GeneralResponse::ResponseCode::GONE, TRI_ERROR_REQUEST_CANCELED);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief dumps the response as JSON into the response string buffer
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::dumpResponse(VPackSlice const& slice,
|
|
VPackOptions const* options) {
|
|
VPackStringBufferAdapter buffer(_response->body().stringBuffer());
|
|
|
|
VPackDumper dumper(&buffer, options);
|
|
try {
|
|
dumper.dump(slice);
|
|
} catch (std::exception const& ex) {
|
|
generateError(GeneralResponse::ResponseCode::SERVER_ERROR, TRI_ERROR_INTERNAL, ex.what());
|
|
} catch (...) {
|
|
generateError(GeneralResponse::ResponseCode::SERVER_ERROR, TRI_ERROR_INTERNAL,
|
|
"cannot generate output");
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief checks if velocypack is expected as answer
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool RestBaseHandler::returnVelocypack() const {
|
|
auto accept = std::string(_request->header("accept"));
|
|
if (std::string::npos == accept.find("application/x-velocypack")) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief writes volocypack or json to response
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void RestBaseHandler::writeResult(arangodb::velocypack::Slice const& slice, VPackOptions const& options){
|
|
if(returnVelocypack()) {
|
|
_response->setContentType("application/x-velocypack");
|
|
_response->body().appendText(slice.startAs<const char>(),slice.byteSize());
|
|
} else {
|
|
_response->setContentType("application/json; charset=utf-8");
|
|
dumpResponse(slice, &options);
|
|
}
|
|
}
|