def get_host(environ, trusted_hosts=None):
    """Return the real host for the given WSGI environment.  This first checks
    the `X-Forwarded-Host` header, then the normal `Host` header, and finally
    the `SERVER_NAME` environment variable (using the first one it finds).

    Optionally it verifies that the host is in a list of trusted hosts.
    If the host is not in there it will raise a
    :exc:`~werkzeug.exceptions.SecurityError`.

    :param environ: the WSGI environment to get the host of.
    :param trusted_hosts: a list of trusted hosts, see :func:`host_is_trusted`
                          for more information.
    """
    if 'HTTP_X_FORWARDED_HOST' in environ:
        rv = environ['HTTP_X_FORWARDED_HOST'].split(',', 1)[0].strip()
    elif 'HTTP_HOST' in environ:
        rv = environ['HTTP_HOST']
    else:
        rv = environ['SERVER_NAME']
        if (environ['wsgi.url_scheme'], environ['SERVER_PORT']) not \
           in (('https', '443'), ('http', '80')):
            rv += ':' + environ['SERVER_PORT']
    if trusted_hosts is not None:
        if not host_is_trusted(rv, trusted_hosts):
            from werkzeug.exceptions import SecurityError
            raise SecurityError('Host "%s" is not trusted' % rv)
    return rv
def get_host(environ, trusted_hosts=None):
    """Return the real host for the given WSGI environment.  This first checks
    the `X-Forwarded-Host` header, then the normal `Host` header, and finally
    the `SERVER_NAME` environment variable (using the first one it finds).

    Optionally it verifies that the host is in a list of trusted hosts.
    If the host is not in there it will raise a
    :exc:`~werkzeug.exceptions.SecurityError`.

    :param environ: the WSGI environment to get the host of.
    :param trusted_hosts: a list of trusted hosts, see :func:`host_is_trusted`
                          for more information.
    """
    if 'HTTP_X_FORWARDED_HOST' in environ:
        rv = environ['HTTP_X_FORWARDED_HOST'].split(',', 1)[0].strip()
    elif 'HTTP_HOST' in environ:
        rv = environ['HTTP_HOST']
    else:
        rv = environ['SERVER_NAME']
        if (environ['wsgi.url_scheme'], environ['SERVER_PORT']) not \
           in (('https', '443'), ('http', '80')):
            rv += ':' + environ['SERVER_PORT']
    if trusted_hosts is not None:
        if not host_is_trusted(rv, trusted_hosts):
            from werkzeug.exceptions import SecurityError
            raise SecurityError('Host "%s" is not trusted' % rv)
    return rv
def get_host ( environ , trusted_hosts = None ) : if 'HTTP_X_FORWARDED_HOST' in environ : rv = environ [ 'HTTP_X_FORWARDED_HOST' ] . split ( ',' , 1 ) [ 0 ] . strip ( ) elif 'HTTP_HOST' in environ : rv = environ [ 'HTTP_HOST' ] else : rv = environ [ 'SERVER_NAME' ] if ( environ [ 'wsgi.url_scheme' ] , environ [ 'SERVER_PORT' ] ) not in ( ( 'https' , '443' ) , ( 'http' , '80' ) ) : rv += ':' + environ [ 'SERVER_PORT' ] if trusted_hosts is not None : if not host_is_trusted ( rv , trusted_hosts ) : from werkzeug . exceptions import SecurityError raise SecurityError ( 'Host "%s" is not trusted' % rv ) return rv
Return the real host for the given WSGI environment.  This first checks
    the `X-Forwarded-Host` header, then the normal `Host` header, and finally
    the `SERVER_NAME` environment variable (using the first one it finds).

    Optionally it verifies that the host is in a list of trusted hosts.
    If the host is not in there it will raise a
    :exc:`~werkzeug.exceptions.SecurityError`.

    :param environ: the WSGI environment to get the host of.
    :param trusted_hosts: a list of trusted hosts, see :func:`host_is_trusted`
                          for more information.
Return the real host for the given WSGI environment . This first checks the X - Forwarded - Host header then the normal Host header and finally the SERVER_NAME environment variable ( using the first one it finds ) .