How to pass data in Poco HTTPRequest - ssl

Question

This is regarding to my project, Where I am write Poco SSL client to communicate with a server.
I am able to do (i) Basic Auth (ii) Cert exchange. But after sending post request I am facing "Error 500".
Let me explain it=>
I have a working curl:
curl -d '{"name":"com.my.session.value"}' -H 'Content-Type: application/json' -H 'Accept: application/json' -E MyCert.pem --key MyKey.pem -u testuser -k -vvv https://<server-ip>:<port>/Internal/directory/path
using this I am able to print data on console. So tried to write same in Poco/C++:
// I have handler for keyPassparse, cert, invalid-cert-handler and used them in below line
SSLManager::instance().initializeClient(parse_str, Cert, ptrContext);
URI uri(argv[1]);
Poco::Net::HTTPSClientSession session(uri.getHost(), uri.getPort());
session.setKeepAlive(true);
Poco::Net::HTTPRequest req(Poco::Net::HTTPRequest::HTTP_POST, uri.getPath(), Poco::Net::HTTPMessage::HTTP_1_1);
HTTPBasicCredentials cred("testuser", "secret");
//Here I tried to add headers and data
cred.authenticate(req);
req.add("Content-Type","application/json");
req.add("Accept","application/json");
req.add("data","com.my.session.value"); // try-1 to add data
req.setKeepAlive(true);
std::ostream& myOStream = session.sendRequest(req);
std::string body("name=com.my.session.value"); // try-2 to add data
myOStream << body;
Poco::Net::HTTPResponse response;
std::istream& rs = session.receiveResponse(response);
std::cout << response.getStatus() << " " << response.getReason() << std::endl;
}
catch (Exception& exc)
{
std::cerr << exc.displayText() << std::endl;
return 1;
}
return 0;
}
This is always returning Error:500 (Internal server error)
Which means my data section is not reaching properly.
Please suggest me a way to pass proper "data" section to server.
Thanks in advance.

Answer 1

I found the solution for this:
1) I sent data as json:
Poco::JSON::Object obj;
obj.set("name", "com.my.session.value");
std::stringstream ss;
obj.stringify(ss);
2) Content herders should not be added by "add", used below for them:
req.setContentType("application/json");
req.setContentLength(ss.str().size());
3) Now sending body like this:
std::ostream& myOStream = session.sendRequest(req);
obj.stringify(myOStream);
Approach used:
I wrote code for http.
Sent same data by curl and exe, captured packets for both.
Compared and fixed gaps one by one.
I hope this will help someone in future.