CORS-enabled WSGI server (minimal sample)

wsgi_cors.py

#!/usr/bin/env python

def handler(environ, start_response):
    method = environ["REQUEST_METHOD"]
    origin = environ.get("HTTP_ORIGIN")
    cookie = environ.get("HTTP_COOKIE", "N/A")
    print ""
    print method, environ["PATH_INFO"]
    print "Origin:", origin
    print "Cookie:", cookie

    cors = origin
    preflight = cors and method == "OPTIONS"

    headers = [("Content-Type", "text/plain")]
    if cors:
        headers.extend([
            ("Access-Control-Allow-Origin", origin),
            ("Access-Control-Allow-Credentials", "true")
        ])
        if preflight:
            headers.extend([
                ("Access-Control-Allow-Methods", "POST"),
                ("Access-Control-Allow-Headers", "Content-Type")
            ])
    else:
        headers.append(("Set-Cookie", "auth=fnd"))

    if method == "OPTIONS":
        start_response("204 No Content", headers)
        return []
    else:
        start_response("200 OK", headers)
        return ["Cookie: ", cookie]


if __name__ == "__main__":
    import sys
    from wsgiref.simple_server import make_server

    port = sys.argv[1]
    srv = make_server("localhost", int(port), handler)
    srv.serve_forever()

I don't even know how I ended up Googling this, but you are the best for posting this. Saved me so much time figuring out all the syntax. I knew what I wanted, but I had no clue what the right syntax was.

Hey @grantcurell, I'm glad you found this and it proved useful - thanks for letting me know! (I don't even remember creating this... )

This is pretty useful; was wondering how we do that with WGSI

This is pretty useful; was wondering how we do that with WGSI

👍