Hello!
I’ve added sometimes ago a loadUrl in the excellent ofxXmlSettings addon.
I can’t find anything about that in poco documentation/forum so I guess it has to do with the of build of the library!
Here’s the method it self, I’ve add every try/catch I could just to be sure that every exception is catched, but well, no success with that:
bool ofxXmlSettings::loadUrl(string url){
bool loadOkay = false;
std::string xmlString;
// Register Poco HTTPStreamFactory
if(!HTTPStreamFactoryLoaded) {
HTTPStreamFactory::registerFactory();
HTTPStreamFactoryLoaded = true;
}
// URIStreamOpener may throw an exception
try {
// Open URI Stream
std::istream* streamOpener;
try{
URIStreamOpener::defaultOpener();
try {
streamOpener = URIStreamOpener::defaultOpener().open(url);
}
catch (Poco::Exception& e){
std::string what = e.displayText();
printf("%s\n", what.c_str());
}
}
catch (Poco::Exception& e){
std::string what = e.displayText();
printf("%s\n", what.c_str());
}
std::auto_ptr<std::istream> pStr(streamOpener);
// Copy Stream to string
StreamCopier::copyToString(*pStr.get(), xmlString);
// Load string
loadOkay = loadString(xmlString);
}
catch (Poco::Exception& e){
std::string what = e.displayText();
printf("%s\n", what.c_str());
throw;
}
return loadOkay;
}
You can try by disabling your internet connection and try to load any xml from an url or trying to load a false url.
Does someone has come to a solution for this problem?
Thanks a lot!
Simon.
PS: Here’s a more readable code (without the unnecessary try/catch) :
bool ofxXmlSettings::loadUrl(string url){
bool loadOkay = false;
std::string xmlString;
// Register Poco HTTPStreamFactory
if(!HTTPStreamFactoryLoaded) {
HTTPStreamFactory::registerFactory();
HTTPStreamFactoryLoaded = true; // this is a global var
}
// URIStreamOpener may throw an exception
try {
// Open URI Stream
std::istream* streamOpener;
URIStreamOpener::defaultOpener();
streamOpener = URIStreamOpener::defaultOpener().open(url);
std::auto_ptr<std::istream> pStr(streamOpener);
// Copy Stream to string
StreamCopier::copyToString(*pStr.get(), xmlString);
// Load string
loadOkay = loadString(xmlString);
}
}
return loadOkay;
}
damian
January 9, 2010, 6:42pm
#2
hi Simon,
it’s possible that C++ exceptions are disabled in your project settings. create a basic try/catch block and force-throw an exception yourself - see if it gets caught.
hth,
Hey Thanks Damian!
Didn’t knew it was possible to deactivate Exceptions!
Actually I switched to the last release of Openframeworks, and I don’t know if it’s because Poco has been updated or because the project’s settings has been changed but now it’s working perfectly, throwing exceptions as expected!
Anyway thanks a lot! It’s a good thing to know!
Take care,
Simon.
Hey,
#0 005177C3 _Unwind_SjLj_RaiseException() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#1 00517D4A _Unwind_SjLj_Resume_or_Rethrow() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#2 0050C60E __cxa_rethrow() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#3 004B699E Poco::Net::SocketImpl::connect() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#4 004B52D4 Poco::Net::StreamSocket::connect() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#5 004A4CA6 Poco::Net::HTTPSession::connect() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#6 0049526B Poco::Net::HTTPClientSession::reconnect() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#7 004944DE Poco::Net::HTTPClientSession::sendRequest() (C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/c++/3.4.5/iostream:77)
#8 00452993 scPulse::threadedFunction(this=0x1b597fc) (C:/Documents and Settings/Elie Zananiri/My Documents/of_preRelease_v0061_win_cb_FAT/apps/1TSQ/OneTSQ/src/scPulse.cpp:45)
#9 005388CA ofxThread::thread(objPtr=0x1b597fc) (C:/Documents and Settings/Elie Zananiri/My Documents/of_preRelease_v0061_win_cb_FAT/addons/ofxThread/src/ofxThread.h:37)
#10 77C3A3B0 msvcrt!_endthreadex() (C:\WINDOWS\system32\msvcrt.dll:??)
#11 01B597FC ??() (??:??)
#12 003F01C8 ??() (??:??)
#13 7C927784 ntdll!RtlPcToFileHeader() (C:\WINDOWS\system32\ntdll.dll:??)
#14 01B58A10 ??() (??:??)
#15 00000000 ??() (??:??)
I think I have exceptions turned on (although I can’t seem to find that setting in Code::Blocks) because I see the expected output with the following code:
try {
throw 20;
} catch (int e) {
cout << "An exception occurred. Exception Nr. " << e << endl;
}
Here is the full code of the function in question (it’s basically code from the SimpleWebScraper):
while (isThreadRunning()) {
// ping the server
try {
URI uri(url);
string path(uri.getPathAndQuery());
if (path.empty()) path = "/";
HTTPClientSession session(uri.getHost(), uri.getPort());
HTTPRequest req(HTTPRequest::HTTP_GET, path, HTTPMessage::HTTP_1_1);
ofLog(OF_LOG_NOTICE, "Pulse HTTP Request Status: " + uri.getHost() + " " + ofToString(uri.getPort()));
session.sendRequest(req);
HTTPResponse res;
std::istream& rs = session.receiveResponse(res);
ofLog(OF_LOG_NOTICE, "Pulse HTTP Response Status: " + ofToString(res.getStatus()) + " " + res.getReason());
} catch (Exception& exc) {
ofLog(OF_LOG_ERROR, exc.displayText());
}
ofSleepMillis(interval);
}
I’m on Code::Blocks under Windows XP. Any help is appreciated!
Thanks,