can't rewrite request cookie

[stephenliu1944]

I want to rewrite request cookie using following code, but didn't work.

proxy.on('proxyReq', function (proxyReq, req, res) {
    proxyReq.setHeader('cookie', 'SESSION=123');
});

And is there a way to find API of proxyReq Object?

[andorfermichael]

I would be interested in a solution too.