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qgshelp.cpp
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qgshelp.cpp
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/***************************************************************************
qgshelp.cpp
--------------------------------------
Date : December 2016
Copyright : (C) 2016 by Alexander Bruy
Email : alexander dot bruy at gmail dot com
***************************************************************************
* *
* 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 "qgshelp.h"
#include "qgis.h"
#include "qgssettings.h"
#include "qgsapplication.h"
#include "qgsexpressioncontext.h"
#include <QUrl>
#include <QFileInfo>
#include <QTcpSocket>
#include <QDesktopServices>
#include <QRegularExpression>
#include <QNetworkProxy>
#include <QNetworkProxyFactory>
#include <memory>
void QgsHelp::openHelp( const QString &key )
{
QDesktopServices::openUrl( QgsHelp::helpUrl( key ) );
}
QUrl QgsHelp::helpUrl( const QString &key )
{
QUrl helpNotFound = QUrl::fromLocalFile( QgsApplication::pkgDataPath() + "/doc/nohelp.html" );
QgsSettings settings;
QStringList paths = settings.value( QStringLiteral( "help/helpSearchPath" ) ).toStringList();
if ( paths.isEmpty() )
{
return helpNotFound;
}
std::unique_ptr<QgsExpressionContextScope> scope( QgsExpressionContextUtils::globalScope() );
QUrl helpUrl;
QString helpPath, fullPath;
bool helpFound = false;
Q_FOREACH ( const QString &path, paths )
{
if ( path.endsWith( QLatin1String( "\\" ) ) || path.endsWith( QLatin1String( "/" ) ) )
{
fullPath = path.left( path.size() - 1 );
}
else
{
fullPath = path;
}
Q_FOREACH ( const QString &var, scope->variableNames() )
{
QRegularExpression rx( QStringLiteral( "(<!\\$\\$)*(\\$%1)" ).arg( var ) );
fullPath.replace( rx, scope->variable( var ).toString() );
}
fullPath.replace( QRegularExpression( QStringLiteral( "(\\$\\$)" ) ), QStringLiteral( "$" ) );
helpPath = QStringLiteral( "%1/%2" ).arg( fullPath, key );
if ( helpPath.startsWith( QStringLiteral( "http" ) ) )
{
if ( !QgsHelp::urlExists( helpPath ) )
{
continue;
}
helpUrl = QUrl( helpPath );
}
else
{
QString filePath = helpPath.mid( 0, helpPath.lastIndexOf( QLatin1String( "#" ) ) );
if ( !QFileInfo::exists( filePath ) )
{
continue;
}
helpUrl = QUrl::fromLocalFile( filePath );
int pos = helpPath.lastIndexOf( QLatin1String( "#" ) );
if ( pos != -1 )
{
helpUrl.setFragment( helpPath.mid( helpPath.lastIndexOf( QLatin1String( "#" ) ) + 1, -1 ) );
}
}
helpFound = true;
break;
}
return helpFound ? helpUrl : helpNotFound;
}
bool QgsHelp::urlExists( const QString &url )
{
QUrl helpUrl( url );
QTcpSocket socket;
QgsSettings settings;
bool proxyEnabled = settings.value( QStringLiteral( "proxy/proxyEnabled" ), false ).toBool();
if ( proxyEnabled )
{
QNetworkProxy proxy;
QString proxyHost = settings.value( QStringLiteral( "proxy/proxyHost" ), QString() ).toString();
int proxyPort = settings.value( QStringLiteral( "proxy/proxyPort" ), QString() ).toString().toInt();
QString proxyUser = settings.value( QStringLiteral( "proxy/proxyUser" ), QString() ).toString();
QString proxyPassword = settings.value( QStringLiteral( "proxy/proxyPassword" ), QString() ).toString();
QString proxyTypeString = settings.value( QStringLiteral( "proxy/proxyType" ), QString() ).toString();
if ( proxyTypeString == QLatin1String( "DefaultProxy" ) )
{
QList<QNetworkProxy> proxies = QNetworkProxyFactory::systemProxyForQuery();
if ( !proxies.isEmpty() )
{
proxy = proxies.first();
}
}
else
{
QNetworkProxy::ProxyType proxyType = QNetworkProxy::DefaultProxy;
if ( proxyTypeString == QLatin1String( "Socks5Proxy" ) )
{
proxyType = QNetworkProxy::Socks5Proxy;
}
else if ( proxyTypeString == QLatin1String( "HttpProxy" ) )
{
proxyType = QNetworkProxy::HttpProxy;
}
else if ( proxyTypeString == QLatin1String( "HttpCachingProxy" ) )
{
proxyType = QNetworkProxy::HttpCachingProxy;
}
else if ( proxyTypeString == QLatin1String( "FtpCachingProxy" ) )
{
proxyType = QNetworkProxy::FtpCachingProxy;
}
proxy = QNetworkProxy( proxyType, proxyHost, proxyPort, proxyUser, proxyPassword );
}
socket.setProxy( proxy );
}
socket.connectToHost( helpUrl.host(), 80 );
if ( socket.waitForConnected() )
{
socket.write( "HEAD " + helpUrl.path().toUtf8() + " HTTP/1.1\r\n"
"Host: " + helpUrl.host().toUtf8() + "\r\n\r\n" );
if ( socket.waitForReadyRead() )
{
QByteArray bytes = socket.readAll();
if ( bytes.contains( "200 OK" ) || bytes.contains( "302 Found" ) || bytes.contains( "301 Moved" ) )
{
return true;
}
}
}
return false;
}