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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_request_url(environ):
 # type: (Dict[str, str]) -> str """Return the absolute URL without query string for the given WSGI environment."""

    return "%s://%s/%s" % (
        environ.get("wsgi.url_scheme"),
        get_host(environ),
        wsgi_decoding_dance(environ.get("PATH_INFO") or "").lstrip("/"),
    )