Using StreamWebSocket in c++ windows Store app

Question

I am trying to read data from a web page using StreamWebSocket class. But I am getting unhandled exception as below:

"Unhandled exception at 0x60FA8AE3 (msvcr110d.dll) in Task.exe: An invalid parameter was passed to a function that considers invalid parameters fatal.( it appears in file invarg.c )"

Here is the code I am trying:

	
// s is class member of type StreamWebSocket.
s = ref new StreamWebSocket();
	Uri^ u = ref new Uri( "wss://http://msdn.microsoft.com/en-us/library/hh438388(v=vs.85).aspx" );

	 task<void>(s->ConnectAsync( u )).then([this]( task<void> p)
	 {
		 try
		 {
			OutputDebugString( L"complete" );
			// get the input stream and read data
		 }
		 catch( ...)
		 {
		 }
	 });

What could be wring with this? My intention is to read the contents of the web page.

Answer 1

drop the wss:// and only use https://  Also consider only using IXMLHttpRequest instead

---

Jeff Sanders (MSFT)

Answer 2

I tried using https://

 = ref new StreamWebSocket();
	Uri^ u = ref new Uri( "https://http://msdn.microsoft.com/en-us/library/hh438388(v=vs.85).aspx" );

	 task<void>(s->ConnectAsync( u )).then([this]( task<void> p)
	 {
		 try
		 {
			OutputDebugString( L"complete" );
		 }
		 catch( ...)
		 {
		 }
	 });

but it gave the following error:

WinRT information: 'uri': WebSocket URIs require a 'ws://' or 'wss://' scheme.

Answer 3

I apologize, I meant the opposite.  wss:// if for a secure socket.  ws:// would be an unsecure socket.

Also search the samples and understand how they work as that will help you understand the proper usage of WebSockets:

http://code.msdn.microsoft.com/windowsapps/site/search?query=WebSocket&f%5B0%5D.Value=WebSocket&f%5B0%5D.Type=SearchText&ac=8

-Jeff

---

Jeff Sanders (MSFT)