Question

I am trying to build a C++ app to access a XML resource. Using http the code works fine, from what I can tell from the docs, all I need to do to for the https to work is to make sure ssl is install (yes the dev edition is installed), and change the StreamFactory to HTTPSStreamFactory.

Here is the code that works :

Poco::Net::HTTPStreamFactory::registerFactory();
Poco::URI uri(argv[1]);

std::auto_ptr<std::istream> pStr(Poco::URIStreamOpener::defaultOpener().open(uri));
std::string str;      
StreamCopier::copyToString(*pStr.get(), str);

Here is the code that fails
Poco::Net::HTTPSStreamFactory::registerFactory();
Poco::URI uri(argv[1]);

std::auto_ptr<std::istream> pStr(Poco::URIStreamOpener::defaultOpener().open(uri));
std::string str;      
StreamCopier::copyToString(*pStr.get(), str);

When I make a request w/ HTTPSStreamFactory this is the error message I get :

NULL pointer: _pInstance [in file
“/home/chpick/poco-1.3.6p2/Util/include/Poco/Util/Application.h”,
line 422]

I have attached the Application.h

inline Application& Application::instance()
{
    poco_check_ptr (_pInstance);
    return *_pInstance;
}

Any help would be great. Thanks

Answer 1

I ended up going about it a different way : Here is what I did.

    const Poco::URI uri(xmlParams.restURI);
    std::string path(argv[1]);
    const Poco::Net::Context::Ptr context = new Context(Context::CLIENT_USE, "", "", "", Context::VERIFY_NONE, 9, false, "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH");
    Poco::Net::HTTPSClientSession session(uri.getHost(), uri.getPort(), context );
    Poco::Net::HTTPRequest req(Poco::Net::HTTPRequest::HTTP_GET, argv[1] );
    req.setKeepAlive(false);

  std::string strToSend = "/";
    session.sendRequest(req) << strToSend;
    Poco::Net::HTTPResponse res;
    std::istream& rs = session.receiveResponse(res);    // typedef std::istream XMLCharInputStream;

    std::string str;    
    StreamCopier::copyToString(rs, str);

    std::istringstream istr(str);
    InputSource source(istr);
    parser.parse(&source);