qt-everywhere-src-5.14.1/qtwebengine/examples/webenginewidgets/webui/webuihandler.cpp

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#include "webuihandler.h"

#include <QApplication>
#include <QFile>
#include <QWebEngineUrlRequestJob>
#include <QWebEngineUrlScheme>

#define SCHEMENAME "webui"

const QByteArray WebUiHandler::schemeName = QByteArrayLiteral(SCHEMENAME);
const QUrl WebUiHandler::aboutUrl = QUrl(QStringLiteral(SCHEMENAME ":about"));

WebUiHandler::WebUiHandler(QObject *parent)
    : QWebEngineUrlSchemeHandler(parent)
{
}

void WebUiHandler::requestStarted(QWebEngineUrlRequestJob *job)
{
    static const QUrl webUiOrigin(QStringLiteral(SCHEMENAME ":"));
    static const QByteArray GET(QByteArrayLiteral("GET"));
    static const QByteArray POST(QByteArrayLiteral("POST"));

    QByteArray method = job->requestMethod();
    QUrl url = job->requestUrl();
    QUrl initiator = job->initiator();

    if (method == GET && url == aboutUrl) {
        QFile *file = new QFile(QStringLiteral(":/about.html"), job);
        file->open(QIODevice::ReadOnly);
        job->reply(QByteArrayLiteral("text/html"), file);
    } else if (method == POST && url == aboutUrl && initiator == webUiOrigin) {
        job->fail(QWebEngineUrlRequestJob::RequestAborted);
        QApplication::exit();
    } else {
        job->fail(QWebEngineUrlRequestJob::UrlNotFound);
    }
}

// static
void WebUiHandler::registerUrlScheme()
{
    QWebEngineUrlScheme webUiScheme(schemeName);
    webUiScheme.setFlags(QWebEngineUrlScheme::SecureScheme |
                         QWebEngineUrlScheme::LocalScheme |
                         QWebEngineUrlScheme::LocalAccessAllowed);
    QWebEngineUrlScheme::registerScheme(webUiScheme);
}