qgsserverstatichandler.cpp

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/***************************************************************************
  qgsserverstatichandler.cpp - QgsServerStaticHandler
 
 ---------------------
 begin                : 30.7.2020
 copyright            : (C) 2020 by Alessandro Pasotti
 email                : elpaso at itopen dot it
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "qgsserverstatichandler.h"
 
#include "qgsmessagelog.h"
#include "qgsserverresponse.h"
 
#include <QFile>
#include <QMimeDatabase>
#include <QString>
 
using namespace Qt::StringLiterals;
 
QgsServerStaticHandler::QgsServerStaticHandler( const QString &pathRegExp, const QString &staticPathSuffix )
  : mPathRegExp( pathRegExp )
  , mStaticPathSuffix( staticPathSuffix )
{
  setContentTypes( { QgsServerOgcApi::ContentType::HTML } );
}
 
void QgsServerStaticHandler::handleRequest( const QgsServerApiContext &context ) const
{
  const QRegularExpressionMatch match { path().match( context.request()->url().path() ) };
  if ( !match.hasMatch() )
  {
    throw QgsServerApiNotFoundError( u"Static file was not found"_s );
  }
 
  const QString staticFilePath { match.captured( u"staticFilePath"_s ) };
  // Calculate real path
  QString filePath { staticPath( context ) };
  if ( !mStaticPathSuffix.isEmpty() )
  {
    filePath += '/' + mStaticPathSuffix;
  }
  filePath += '/' + staticFilePath;
  if ( !QFile::exists( filePath ) )
  {
    QgsMessageLog::logMessage( u"Static file was not found: %1"_s.arg( filePath ), u"Server"_s, Qgis::MessageLevel::Info );
    throw QgsServerApiNotFoundError( u"Static file %1 was not found"_s.arg( staticFilePath ) );
  }
 
  QFile f( filePath );
  if ( !f.open( QIODevice::ReadOnly ) )
  {
    throw QgsServerApiInternalServerError( u"Could not open static file %1"_s.arg( staticFilePath ) );
  }
 
  const qint64 size { f.size() };
  const QByteArray content { f.readAll() };
  const QMimeType mimeType { QMimeDatabase().mimeTypeForFile( filePath ) };
  context.response()->setHeader( u"Content-Type"_s, mimeType.name() );
  context.response()->setHeader( u"Content-Length"_s, QString::number( size ) );
  context.response()->write( content );
}