src/network/networkservice.cpp - develop - s5z6/telegraf

src/network/networkservice.cpp
92 строки3 KB
mbarashkov
Рефакторинг networkService
04 июн 2025, 16:33
04 июн 2025, 16:33234b1c3
#include "networkservice.h"
#include <QUrl>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QRegularExpressionMatchIterator>
#include <QTextCodec>

#include <QDebug>

NetworkService* NetworkService::instance;

NetworkService::NetworkService(QObject *parent) :
    QObject(parent),
    networkManager(new QNetworkAccessManager(this))
{
    NetworkService::instance = this;
}

void NetworkService::getPageSource(const QString &address)
{
    QUrl url = QUrl(address);
    QNetworkRequest request(url);

    request.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
    request.setHeader(QNetworkRequest::UserAgentHeader, "Telegraf Bot (Aurora OS)");
    request.setRawHeader(QByteArray("Accept"), QByteArray("text/html,application/xhtml+xml"));
    request.setRawHeader(QByteArray("Accept-Charset"), QByteArray("utf-8"));
    request.setRawHeader(QByteArray("Connection"), QByteArray("close"));
    request.setRawHeader(QByteArray("Cache-Control"), QByteArray("max-age=0"));

    QNetworkReply *reply = networkManager->get(request);

    connect(reply, SIGNAL(finished()), this, SLOT(handleGetPageSourceFinished()));
}

void NetworkService::handleGetPageSourceFinished()
{
    QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());

    reply->deleteLater();

    if (reply->error() != QNetworkReply::NoError)
    {
        return;
    }

    QVariant contentTypeHeader = reply->header(QNetworkRequest::ContentTypeHeader);

    if (!contentTypeHeader.isValid())
    {
        return;
    }

    if (contentTypeHeader.toString().indexOf("text/html", 0, Qt::CaseInsensitive) == -1)
    {
        return;
    }

    QString charset = "UTF-8";
    QRegularExpression charsetRegularExpression("charset\\s*\\=[\\s\\\"\\\']*([^\\s\\\"\\\'\\,>]*)");
    QRegularExpressionMatchIterator matchIterator = charsetRegularExpression.globalMatch(contentTypeHeader.toString());
    QStringList availableCharsets;

    while (matchIterator.hasNext())
    {
        QRegularExpressionMatch nextMatch = matchIterator.next();
        QString currentCharset = nextMatch.captured(1).toUpper();
        availableCharsets.append(currentCharset);
    }

    if (availableCharsets.size() > 0 && !availableCharsets.contains("UTF-8"))
    {
        // If we haven't received the requested UTF-8, we simply use the last one which we received in the header
        charset = availableCharsets.last();
    }

    QByteArray rawDocument = reply->readAll();
    QTextCodec *codec = QTextCodec::codecForName(charset.toUtf8());

    if (codec == nullptr)
    {
        return;
    }

    QString resultDocument = codec->toUnicode(rawDocument);
    QRegExp urlRegex("href\\=\"(tg\\:[^\"]+)\\\"");

    if (urlRegex.indexIn(resultDocument) != -1)
    {
        emit tgUrlFound(urlRegex.cap(1));
    }
}