How to setup websocket SSL connect using cpprestsdk? - ssl

Question

I tried to connect to a websocket server with SSL. But always failed on connection(...).
I am new to cpprestsdk, I can't find doc on how to set SSL information to websocket_client.
websocket_client_config config;
config.set_server_name("wss://host:port/v3/api");
websocket_client client(config);
auto fileStream = std::make_sharedconcurrency::streams::ostream();
pplx::task requestTask = fstream::open_ostream(U("results2.html"))
.then([&](ostream outFile)
{
*fileStream = outFile;
// Create http_client to send the request.
uri wsuri(U("wss://host:port/v3/api"));
client.connect(wsuri).wait();
websocket_outgoing_message msg;
msg.set_utf8_message(obj.serialize());
client.send(msg).wait();
printf("send success: %s\n", obj.serialize().c_str());
return client.receive().get();
})
it throws "Error exception:set_fail_handler: 8: TLS handshake failed".

Answer 1

Documentation for cpprestsdk can be found here
C++ REST SDK WebSocket client. Although this doesn't show all the necessary information related to cpprestsdk it will help you.
And also you can get an SSL test example here. I show a simple websocket client implemented using SSL or wss:// scheme
websocket_client client;
std::string body_str("hello");
try
{
client.connect(U("wss://echo.websocket.org/")).wait();
auto receive_task = client.receive().then([body_str](websocket_incoming_message ret_msg) {
VERIFY_ARE_EQUAL(ret_msg.length(), body_str.length());
auto ret_str = ret_msg.extract_string().get();
VERIFY_ARE_EQUAL(body_str.compare(ret_str), 0);
VERIFY_ARE_EQUAL(ret_msg.message_type(), websocket_message_type::text_message);
});
websocket_outgoing_message msg;
msg.set_utf8_message(body_str);
client.send(msg).wait();
receive_task.wait();
client.close().wait();
}
catch (const websocket_exception& e)
{
if (is_timeout(e.what()))
{
// Since this test depends on an outside server sometimes it sporadically can fail due to timeouts
// especially on our build machines.
return;
}
throw;
}
And further examples here to guide you get it successfully is found here
https://github.com/microsoft/cpprestsdk/wiki/Web-Socket