示例：Python

#!/usr/env/python############################################### Vivox Token Generation Example - Python##vivox-token-generation-example---python#############################################import base64import hashlibimport hmacimport jsondef b64url(value):    """Return a base64url-encoded str without trailing ='s"""    return base64.urlsafe_b64encode(value).rstrip('=')def vx_generate_token(key, issuer, exp, vxa, vxi, f, t):    ## Create dictionary of claims    claims = {        'iss': issuer,        'exp': exp,        'vxa': vxa,        'vxi': vxi,        'f': f,        't': t    }    ## Header is static - base64url encoded {}    header = b64url('{}')  # Can also be defined as a constant "e30"    ## Encode claims payload    json_payload = b64url(json.dumps(claims))    ## Join segments to prepare for signing    segments = [header, json_payload]    to_sign = b'.'.join(segments)    ## Sign token with key and HMACSHA256    sig = hmac.new(key, to_sign, hashlib.sha256).digest()    segments.append(b64url(sig))    ## Join all 3 parts of token with . and return    return b'.'.join(segments)if __name__ == '__main__':    ## Example usage    token = vx_generate_token('secret', 'issuer', 1559359105, 'join', 123456, 'sip:.username.@domain.vivox.com', 'sip:confctl-g-channelname@domain.vivox.com')    print(token)