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rooturlschemehandler.cpp
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rooturlschemehandler.cpp
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// Author: Sergey Linev <S.Linev@gsi.de>
// Date: 2017-06-29
// Warning: This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
/*************************************************************************
* Copyright (C) 1995-2023, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#include "rooturlschemehandler.h"
#include "rootwebpage.h" // only because of logger channel
#include <cstring>
#include <QBuffer>
#include <QByteArray>
#include <QFile>
#include <QWebEngineUrlRequestJob>
#include <ROOT/RLogger.hxx>
#include "THttpServer.h"
#include "THttpCallArg.h"
#include "TBase64.h"
/** \class UrlRequestJobHolder
\ingroup qt5webdisplay
Class UrlRequestJobHolder
Required to monitor state of QWebEngineUrlRequestJob
Qt can delete object at any time, therefore one connects destroy signal
from the request to clear pointer
*/
/////////////////////////////////////////////////////////////////
/// Constructor
UrlRequestJobHolder::UrlRequestJobHolder(QWebEngineUrlRequestJob *req) : QObject(), fRequest(req)
{
if (fRequest)
connect(fRequest, &QObject::destroyed, this, &UrlRequestJobHolder::onRequestDeleted);
}
/////////////////////////////////////////////////////////////////
/// destroyed signal handler
void UrlRequestJobHolder::onRequestDeleted(QObject *obj)
{
if (fRequest == obj)
fRequest = nullptr;
}
/////////////////////////////////////////////////////////////////
/// Reset holder
void UrlRequestJobHolder::reset()
{
if (fRequest)
disconnect(fRequest, &QObject::destroyed, this, &UrlRequestJobHolder::onRequestDeleted);
fRequest = nullptr;
}
// ===================================================================
/////////////////////////////////////////////////////////////////////////////////////
/// Class TWebGuiCallArg
/// Specialized handler of requests in THttpServer with QWebEngine
////////////////////////////////////////////////////////////////////////////////////
class TWebGuiCallArg : public THttpCallArg {
protected:
UrlRequestJobHolder fRequest;
public:
explicit TWebGuiCallArg(QWebEngineUrlRequestJob *req = nullptr) : THttpCallArg(), fRequest(req) {}
virtual ~TWebGuiCallArg() {}
/** provide WS kind */
const char *GetWSKind() const override { return "rawlongpoll"; }
/** provide WS platform, intentionally keep qt5 here while it only used on client side */
const char *GetWSPlatform() const override { return "qt5"; }
void SendFile(const char *fname)
{
const char *mime = THttpServer::GetMimeType(fname);
QBuffer *buffer = new QBuffer;
QFile file(fname);
buffer->open(QIODevice::WriteOnly);
if (file.open(QIODevice::ReadOnly)) {
auto arr = file.readAll();
buffer->write(arr);
}
file.close();
buffer->close();
QWebEngineUrlRequestJob *req = fRequest.req();
if (req) {
buffer->connect(req, &QObject::destroyed, buffer, &QObject::deleteLater);
req->reply(mime, buffer);
fRequest.reset();
} else {
delete buffer;
}
}
void HttpReplied() override
{
QWebEngineUrlRequestJob *req = fRequest.req();
if (!req) {
R__LOG_ERROR(QtWebDisplayLog()) << "Qt " << QT_VERSION_STR << " request already processed path " << GetPathName() << " file " << GetFileName();
return;
}
if (Is404()) {
R__LOG_ERROR(QtWebDisplayLog()) << "Qt " << QT_VERSION_STR << " request FAIL path " << GetPathName() << " file " << GetFileName();
req->fail(QWebEngineUrlRequestJob::UrlNotFound);
// abort request
} else if (IsFile()) {
// send file
SendFile((const char *)GetContent());
} else {
QBuffer *buffer = new QBuffer;
buffer->open(QIODevice::WriteOnly);
buffer->write((const char *)GetContent(), GetContentLength());
buffer->close();
buffer->connect(req, &QObject::destroyed, buffer, &QObject::deleteLater);
req->reply(GetContentType(), buffer);
}
fRequest.reset();
}
};
/////////////////////////////////////////////////////////////////
/// Returns fully qualified URL, required to open in QWindow
QString RootUrlSchemeHandler::MakeFullUrl(THttpServer *serv, const QString &url)
{
// TODO: provide support for many servers
fServer = serv;
QString res = "rootscheme://root.server1";
res.append(url);
return res;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Start processing of emulated HTTP request in WebEngine scheme handler
/// Either one reads file or redirect request to THttpServer
void RootUrlSchemeHandler::requestStarted(QWebEngineUrlRequestJob *request)
{
QUrl url = request->requestUrl();
if (!fServer) {
R__LOG_ERROR(QtWebDisplayLog()) << "Server not specified when request is started";
request->fail(QWebEngineUrlRequestJob::UrlNotFound);
return;
}
QString inp_path = url.path();
QString inp_query = url.query();
QString inp_method = request->requestMethod();
// printf("REQUEST PATH:%s QUERY:%s\n", inp_path.toLatin1().data(), inp_query.toLatin1().data());
auto arg = std::make_shared<TWebGuiCallArg>(request);
TString fname;
// process file
if (fServer->IsFileRequested(inp_path.toLatin1().data(), fname)) {
arg->SendFile(fname.Data());
return;
}
// Analyze and cut post data as soon as possible
TString query = inp_query.toLatin1().data();
Int_t pos = query.Index("&post=");
if (pos != kNPOS) {
TString buf = TBase64::Decode(query.Data() + pos + 6);
arg->SetPostData(std::string(buf.Data()));
query.Resize(pos);
}
arg->SetPathAndFileName(inp_path.toLatin1().data());
arg->SetQuery(query.Data());
arg->SetMethod(inp_method.toLatin1().data());
arg->SetTopName("webgui");
// can process immediately - function called in main thread
fServer->SubmitHttp(arg, kTRUE);
}