117 lines
3.1 KiB
C++
117 lines
3.1 KiB
C++
/* This file is part of Strawberry.
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Copyright 2011, David Sansome <me@davidsansome.com>
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#include "messagehandler.h"
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#include <QObject>
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#include <QAbstractSocket>
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#include <QDataStream>
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#include <QIODevice>
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#include <QLocalSocket>
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#include <QByteArray>
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#include "core/logging.h"
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_MessageHandlerBase::_MessageHandlerBase(QIODevice *device, QObject *parent)
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: QObject(parent),
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device_(nullptr),
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flush_abstract_socket_(nullptr),
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flush_local_socket_(nullptr),
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reading_protobuf_(false),
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expected_length_(0),
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is_device_closed_(false) {
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if (device) {
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SetDevice(device);
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}
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}
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void _MessageHandlerBase::SetDevice(QIODevice *device) {
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device_ = device;
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buffer_.open(QIODevice::ReadWrite);
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connect(device, SIGNAL(readyRead()), SLOT(DeviceReadyRead()));
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// Yeah I know.
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if (QAbstractSocket *socket = qobject_cast<QAbstractSocket*>(device)) {
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flush_abstract_socket_ = &QAbstractSocket::flush;
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connect(socket, SIGNAL(disconnected()), SLOT(DeviceClosed()));
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}
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else if (QLocalSocket* socket = qobject_cast<QLocalSocket*>(device)) {
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flush_local_socket_ = &QLocalSocket::flush;
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connect(socket, SIGNAL(disconnected()), SLOT(DeviceClosed()));
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}
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else {
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qFatal("Unsupported device type passed to _MessageHandlerBase");
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}
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}
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void _MessageHandlerBase::DeviceReadyRead() {
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while (device_->bytesAvailable()) {
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if (!reading_protobuf_) {
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// Read the length of the next message
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QDataStream s(device_);
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s >> expected_length_;
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reading_protobuf_ = true;
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}
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// Read some of the message
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buffer_.write(device_->read(expected_length_ - buffer_.size()));
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// Did we get everything?
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if (buffer_.size() == expected_length_) {
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// Parse the message
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if (!RawMessageArrived(buffer_.data())) {
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qLog(Error) << "Malformed protobuf message";
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device_->close();
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return;
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}
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// Clear the buffer
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buffer_.close();
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buffer_.setData(QByteArray());
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buffer_.open(QIODevice::ReadWrite);
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reading_protobuf_ = false;
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}
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}
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}
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void _MessageHandlerBase::WriteMessage(const QByteArray &data) {
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QDataStream s(device_);
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s << quint32(data.length());
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s.writeRawData(data.data(), data.length());
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// Sorry.
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if (flush_abstract_socket_) {
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((static_cast<QAbstractSocket*>(device_))->*(flush_abstract_socket_))();
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}
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else if (flush_local_socket_) {
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((static_cast<QLocalSocket*>(device_))->*(flush_local_socket_))();
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}
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}
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void _MessageHandlerBase::DeviceClosed() {
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is_device_closed_ = true;
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AbortAll();
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}
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