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Source code for galaxy.web.framework.middleware.xforwardedhost

[docs]class XForwardedHostMiddleware:
    """
    A WSGI middleware that changes the HTTP host header in the WSGI environ
    based on the X-Forwarded-Host header IF found
    """


[docs]    def __init__(self, app, global_conf=None):
        self.app = app


    def __call__(self, environ, start_response):
        x_forwarded_host = environ.get("HTTP_X_FORWARDED_HOST", None)
        if x_forwarded_host:
            environ["ORGINAL_HTTP_HOST"] = environ["HTTP_HOST"]
            environ["HTTP_HOST"] = x_forwarded_host.split(", ", 1)[0]
        x_forwarded_for = environ.get("HTTP_X_FORWARDED_FOR", None)
        if x_forwarded_for:
            environ["ORGINAL_REMOTE_ADDR"] = environ["REMOTE_ADDR"]
            environ["REMOTE_ADDR"] = x_forwarded_for.split(", ", 1)[0]
        x_url_scheme = environ.get("HTTP_X_URL_SCHEME", None)
        if x_url_scheme:
            environ["original_wsgi.url_scheme"] = environ["wsgi.url_scheme"]
            environ["wsgi.url_scheme"] = x_url_scheme
        return self.app(environ, start_response)