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#include "gopherclient.hpp"
#include "ioutil.hpp"
#include "kristall.hpp"
GopherClient::GopherClient(QObject *parent) : ProtocolHandler(parent)
{
connect(&socket, &QTcpSocket::connected, this, &GopherClient::on_connected);
connect(&socket, &QTcpSocket::readyRead, this, &GopherClient::on_readRead);
connect(&socket, &QTcpSocket::disconnected, this, &GopherClient::on_finished);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0))
connect(&socket, &QTcpSocket::errorOccurred, this, &GopherClient::on_socketError);
#else
connect(&socket, QOverload<QAbstractSocket::SocketError>::of(&QTcpSocket::error), this, &GopherClient::on_socketError);
#endif
connect(&socket, &QAbstractSocket::hostFound, this, [this]() {
emit this->requestStateChange(RequestState::HostFound);
});
emit this->requestStateChange(RequestState::None);
}
GopherClient::~GopherClient()
{
}
bool GopherClient::supportsScheme(const QString &scheme) const
{
return (scheme == "gopher");
}
bool GopherClient::startRequest(const QUrl &url, RequestOptions options)
{
Q_UNUSED(options)
if(isInProgress())
return false;
if(url.scheme() != "gopher")
return false;
emit this->requestStateChange(RequestState::Started);
// Second char on the URL path denotes the Gopher type
// See https://tools.ietf.org/html/rfc4266
QString type = url.path().mid(1, 1);
mime = "application/octet-stream";
if(type == "") mime = "text/gophermap";
else if(type == "0") mime = "text/plain";
else if(type == "1") mime = "text/gophermap";
else if(type == "g") mime = "image/gif";
else if(type == "I") mime = "image/unknown";
else if(type == "h") mime = "text/html";
else if(type == "s") mime = "audio/unknown";
is_processing_binary = (type == "5") or (type == "9") or (type == "I") or (type == "g");
this->requested_url = url;
this->was_cancelled = false;
socket.connectToHost(url.host(), url.port(70));
return true;
}
bool GopherClient::isInProgress() const
{
return socket.isOpen();
}
bool GopherClient::cancelRequest()
{
was_cancelled = true;
if (socket.state() != QTcpSocket::UnconnectedState)
{
socket.disconnectFromHost();
socket.waitForDisconnected(1500);
}
socket.close();
body.clear();
return true;
}
void GopherClient::on_connected()
{
auto blob = (requested_url.path().mid(2) + "\r\n").toUtf8();
IoUtil::writeAll(socket, blob);
emit this->requestStateChange(RequestState::Connected);
}
void GopherClient::on_readRead()
{
body.append(socket.readAll());
if(not is_processing_binary) {
// Strip the "lone dot" from gopher data
if(int index = body.indexOf("\r\n.\r\n"); index >= 0) {
body.resize(index + 2);
socket.close();
}
}
if(not was_cancelled) {
emit this->requestProgress(body.size());
}
}
void GopherClient::on_finished()
{
if(not was_cancelled)
{
this->on_readRead();
emit this->requestComplete(this->body, mime);
was_cancelled = true;
}
body.clear();
emit this->requestStateChange(RequestState::None);
}
void GopherClient::on_socketError(QAbstractSocket::SocketError error_code)
{
// When remote host closes session, the client closes the socket.
// This is more sane then erroring out here as it's a perfectly legal
// state and we know the connection has ended.
if (error_code == QAbstractSocket::RemoteHostClosedError) {
return;
} else {
this->emitNetworkError(error_code, socket.errorString());
}
}
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