How to connect to api.github.com using POCO library - poco-libraries

Question

I'm trying to establish connection with github server via POCO library, my code:
Poco::Net::initializeSSL();
Poco::Net::Context context(Poco::Net::Context::CLIENT_USE, "", "", "", Poco::Net::Context::VERIFY_RELAXED, 9, false, "ALL:!ADH:!LOW:!EXP:!MD5:#STRENGTH");
URI uri("https://api.github.com/zen");
std::string path(uri.getPathAndQuery());
HTTPSClientSession client(uri.getHost(), uri.getPort(), &context);
HTTPRequest req(HTTPRequest::HTTP_GET, path, HTTPMessage::HTTP_1_1);
if (!client.connected())
{
int a{ 0 };//<<==ALWAYS END UP HERE, MEANING THAT client isn't connected
}
Does anybody know how to connect to that server, i.e. what steps are required in order to achieve that?

Answer 1

It is not connected because you did not send the request. Try:
client.sendRequest(req);
UPDATE: GitHub API requires the user agent header, otherwise you'll get 403. So, here's a fully functional example (certificate handler and root cert optional in this particular case, but good to have):
#include "Poco/StreamCopier.h"
#include "Poco/URI.h"
#include "Poco/Exception.h"
#include "Poco/SharedPtr.h"
#include "Poco/Net/SSLManager.h"
#include "Poco/Net/KeyConsoleHandler.h"
#include "Poco/Net/ConsoleCertificateHandler.h"
#include "Poco/Net/HTTPSClientSession.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include <memory>
#include <iostream>
using namespace Poco;
using namespace Poco::Net;
class SSLInitializer {
public:
SSLInitializer() { Poco::Net::initializeSSL(); }
~SSLInitializer() { Poco::Net::uninitializeSSL(); }
};
int main(int argc, char** argv)
{
SSLInitializer sslInitializer;
SharedPtr<InvalidCertificateHandler> ptrCert = new ConsoleCertificateHandler(false);
Context::Ptr ptrContext = new Context(Context::CLIENT_USE, "", "", "rootcert.pem", Context::VERIFY_STRICT, 9, false, "ALL:!ADH:!LOW:!EXP:!MD5:#STRENGTH");
SSLManager::instance().initializeClient(0, ptrCert, ptrContext);
try
{
URI uri("https://api.github.com/zen");
HTTPSClientSession s(uri.getHost(), uri.getPort());
HTTPRequest request(HTTPRequest::HTTP_GET, uri.getPath());
request.set("user-agent", "Poco HTTPSClientSession");
s.sendRequest(request);
HTTPResponse response;
std::istream& rs = s.receiveResponse(response);
StreamCopier::copyStream(rs, std::cout);
std::cout << std::endl;
}
catch (Exception& ex)
{
std::cout << ex.displayText() << std::endl;
return 1;
}
return 0;
}
And here is the execution thereof:
$ gitget
Avoid administrative distraction.