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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "helpbrowsersupport.h"
#include "helpenginewrapper.h"
#include "helpviewer.h"
#include "tracer.h"
#include <QtHelp/QHelpEngineCore>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkReply>
#include <QtNetwork/QNetworkRequest>
#include <QtCore/QTimer>
#include <QtCore/QCoreApplication>
#include <QtCore/QUrl>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
// -- messages
static const char g_htmlPage[] = "<html><head><meta http-equiv=\"content-type\" content=\"text/html; "
"charset=UTF-8\"><title>%1</title><style>body{padding: 3em 0em;background: #eeeeee;}"
"hr{color: lightgray;width: 100%;}img{float: left;opacity: .8;}#box{background: white;border: 1px solid "
"lightgray;width: 600px;padding: 60px;margin: auto;}h1{font-size: 130%;font-weight: bold;border-bottom: "
"1px solid lightgray;margin-left: 48px;}h2{font-size: 100%;font-weight: normal;border-bottom: 1px solid "
"lightgray;margin-left: 48px;}ul{font-size: 80%;padding-left: 48px;margin: 0;}#reloadButton{padding-left:"
"48px;}</style></head><body><div id=\"box\"><h1>%2</h1><h2>%3</h2><h2><b>%4</b></h2></div></body></html>";
QString HelpBrowserSupport::msgError404()
{
return QCoreApplication::translate("HelpViewer", "Error 404...");
}
QString HelpBrowserSupport::msgPageNotFound()
{
return QCoreApplication::translate("HelpViewer", "The page could not be found");
}
QString HelpBrowserSupport::msgAllDocumentationSets()
{
return QCoreApplication::translate("HelpViewer",
"Please make sure that you have all "
"documentation sets installed.");
}
QString HelpBrowserSupport::msgLoadError(const QUrl &url)
{
return HelpViewer::tr("Error loading: %1").arg(url.toString());
}
QString HelpBrowserSupport::msgHtmlErrorPage(const QUrl &url)
{
return QString::fromLatin1(g_htmlPage)
.arg(HelpBrowserSupport::msgError404(), HelpBrowserSupport::msgPageNotFound(),
HelpBrowserSupport::msgLoadError(url), HelpBrowserSupport::msgAllDocumentationSets());
}
// A QNetworkAccessManager implementing unhandled URL schema handling for WebKit-type browsers.
// -- HelpNetworkReply
class HelpNetworkReply : public QNetworkReply
{
public:
HelpNetworkReply(const QNetworkRequest &request, const QByteArray &fileData,
const QString &mimeType);
void abort() override;
qint64 bytesAvailable() const override
{ return data.size() + QNetworkReply::bytesAvailable(); }
protected:
qint64 readData(char *data, qint64 maxlen) override;
private:
QByteArray data;
const qint64 origLen;
};
HelpNetworkReply::HelpNetworkReply(const QNetworkRequest &request,
const QByteArray &fileData, const QString& mimeType)
: data(fileData), origLen(fileData.size())
{
TRACE_OBJ
setRequest(request);
setUrl(request.url());
setOpenMode(QIODevice::ReadOnly);
setHeader(QNetworkRequest::ContentTypeHeader, mimeType);
setHeader(QNetworkRequest::ContentLengthHeader, QByteArray::number(origLen));
QTimer::singleShot(0, this, &QNetworkReply::metaDataChanged);
QTimer::singleShot(0, this, &QNetworkReply::readyRead);
QTimer::singleShot(0, this, &QNetworkReply::finished);
}
void HelpNetworkReply::abort()
{
TRACE_OBJ
}
qint64 HelpNetworkReply::readData(char *buffer, qint64 maxlen)
{
TRACE_OBJ
qint64 len = qMin(qint64(data.size()), maxlen);
if (len) {
memcpy(buffer, data.constData(), len);
data.remove(0, len);
}
if (!data.size())
QTimer::singleShot(0, this, &QNetworkReply::finished);
return len;
}
// -- HelpRedirectNetworkReply
class HelpRedirectNetworkReply : public QNetworkReply
{
public:
HelpRedirectNetworkReply(const QNetworkRequest &request, const QUrl &newUrl)
{
setRequest(request);
setAttribute(QNetworkRequest::HttpStatusCodeAttribute, 301);
setAttribute(QNetworkRequest::RedirectionTargetAttribute, newUrl);
QTimer::singleShot(0, this, &QNetworkReply::finished);
}
protected:
void abort() override { TRACE_OBJ }
qint64 readData(char*, qint64) override { TRACE_OBJ return qint64(-1); }
};
// -- HelpNetworkAccessManager
class HelpNetworkAccessManager : public QNetworkAccessManager
{
public:
HelpNetworkAccessManager(QObject *parent);
protected:
QNetworkReply *createRequest(Operation op,
const QNetworkRequest &request, QIODevice *outgoingData = nullptr) override;
};
HelpNetworkAccessManager::HelpNetworkAccessManager(QObject *parent)
: QNetworkAccessManager(parent)
{
TRACE_OBJ
}
QNetworkReply *HelpNetworkAccessManager::createRequest(Operation, const QNetworkRequest &request, QIODevice*)
{
TRACE_OBJ
QByteArray data;
const QUrl url = request.url();
QUrl redirectedUrl;
switch (HelpBrowserSupport::resolveUrl(url, &redirectedUrl, &data)) {
case HelpBrowserSupport::UrlRedirect:
return new HelpRedirectNetworkReply(request, redirectedUrl);
case HelpBrowserSupport::UrlLocalData: {
const QString mimeType = HelpViewer::mimeFromUrl(url);
return new HelpNetworkReply(request, data, mimeType);
}
case HelpBrowserSupport::UrlResolveError:
break;
}
return new HelpNetworkReply(request, HelpBrowserSupport::msgHtmlErrorPage(request.url()).toUtf8(),
QStringLiteral("text/html"));
}
QByteArray HelpBrowserSupport::fileDataForLocalUrl(const QUrl &url)
{
return HelpEngineWrapper::instance().fileData(url);
}
HelpBrowserSupport::ResolveUrlResult HelpBrowserSupport::resolveUrl(const QUrl &url,
QUrl *targetUrlP,
QByteArray *dataP)
{
const HelpEngineWrapper &engine = HelpEngineWrapper::instance();
const QUrl targetUrl = engine.findFile(url);
if (!targetUrl.isValid())
return UrlResolveError;
if (targetUrl != url) {
if (targetUrlP)
*targetUrlP = targetUrl;
return UrlRedirect;
}
if (dataP)
*dataP = HelpBrowserSupport::fileDataForLocalUrl(targetUrl);
return UrlLocalData;
}
QNetworkAccessManager *HelpBrowserSupport::createNetworkAccessManager(QObject *parent)
{
return new HelpNetworkAccessManager(parent);
}
QT_END_NAMESPACE
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