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Code Issues Releases Wiki Activity

Don't use exceptions as part of normal flow (#872)

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This commit is contained in:
Murat Seker 2020-07-19 14:44:59 +02:00 committed by GitHub
parent a8954f2cc0
commit c85b4c530c
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3 changed files with 37 additions and 56 deletions
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84
libsrc/webserver/CgiHandler.cpp
View File

@ -28,68 +28,54 @@ void CgiHandler::setBaseUrl(const QString& url)
void CgiHandler::exec(const QStringList & args, QtHttpRequest * request, QtHttpReply * reply)
{
try
_args = args;
_request = request;
_reply = reply;
if ( _args.at(0) == "cfg_jsonserver" )
{
// QByteArray header = reply->getHeader(QtHttpHeader::Host);
// QtHttpRequest::ClientInfo info = request->getClientInfo();
_args = args;
_request = request;
_reply = reply;
cmd_cfg_jsonserver();
// cmd_cfg_set();
cmd_runscript();
throw 1;
}
catch(int e)
else if ( _args.at(0) == "run" )
{
if (e != 0) throw 1;
cmd_runscript();
}
else
{
throw std::runtime_error("CGI command not found");
}
}
void CgiHandler::cmd_cfg_jsonserver()
{
if ( _args.at(0) == "cfg_jsonserver" )
{
quint16 jsonPort = 19444;
// send result as reply
_reply->addHeader ("Content-Type", "text/plain" );
_reply->appendRawData (QByteArrayLiteral(":") % QString::number(jsonPort).toUtf8() );
throw 0;
}
quint16 jsonPort = 19444;
// send result as reply
_reply->addHeader ("Content-Type", "text/plain" );
_reply->appendRawData (QByteArrayLiteral(":") % QString::number(jsonPort).toUtf8() );
}
void CgiHandler::cmd_runscript()
{
if ( _args.at(0) == "run" )
QStringList scriptFilePathList(_args);
scriptFilePathList.removeAt(0);
QString scriptFilePath = scriptFilePathList.join('/');
// relative path not allowed
if ( scriptFilePath.indexOf("..") >=0 )
{
QStringList scriptFilePathList(_args);
scriptFilePathList.removeAt(0);
QString scriptFilePath = scriptFilePathList.join('/');
// relative path not allowed
if (scriptFilePath.indexOf("..") >=0)
{
Error( _log, "relative path not allowed (%s)", scriptFilePath.toStdString().c_str());
throw 1;
}
scriptFilePath = _baseUrl+"/server_scripts/"+scriptFilePath;
if (QFile::exists(scriptFilePath) && scriptFilePath.endsWith(".py") )
{
QtHttpPostData postData = _request->getPostData();
QByteArray inputData; // should be filled with post data
QByteArray data = Process::command_exec("python " + scriptFilePath, inputData);
_reply->addHeader ("Content-Type", "text/plain");
_reply->appendRawData (data);
throw 0;
}
else
{
Error( _log, "script %s doesn't exists or is no python file", scriptFilePath.toStdString().c_str());
}
throw 1;
throw std::runtime_error("[cmd_runscript] Relative path not allowed : %s" + scriptFilePath.toStdString());
}
scriptFilePath = _baseUrl+"/server_scripts/"+scriptFilePath;
if ( !QFile::exists(scriptFilePath) || !scriptFilePath.endsWith(".py") )
{
throw std::runtime_error("[cmd_runscript] Script %s doesn't exists or is no python file : " + scriptFilePath.toStdString());
}
QtHttpPostData postData = _request->getPostData();
QByteArray inputData; // should be filled with post data
QByteArray data = Process::command_exec("python " + scriptFilePath, inputData);
_reply->addHeader ("Content-Type", "text/plain");
_reply->appendRawData (data);
}

4
libsrc/webserver/CgiHandler.h
View File

@ -19,11 +19,11 @@ public:
void setBaseUrl(const QString& url);
void exec(const QStringList & args,QtHttpRequest * request, QtHttpReply * reply);
// cgi commands
private:
// CGI commands
void cmd_cfg_jsonserver();
void cmd_runscript ();
private:
QtHttpReply * _reply;
QtHttpRequest * _request;
QStringList _args;

5
libsrc/webserver/StaticFileServing.cpp
View File

@ -93,11 +93,6 @@ void StaticFileServing::onRequestNeedsReply (QtHttpRequest * request, QtHttpRepl
{
_cgi.exec(uri_parts, request, reply);
}
catch(int err)
{
Error(_log,"Exception while executing cgi %s : %d", path.toStdString().c_str(), err);
printErrorToReply (reply, QtHttpReply::InternalError, "script failed (" % path % ")");
}
catch(std::exception &e)
{
Error(_log,"Exception while executing cgi %s : %s", path.toStdString().c_str(), e.what());