[Q] Where is the HTTP server implementation for platform API testing?

[txj36]

Question

I cannot find the HTTP server implementation in sonic-buildimage that is used by the platform API tests. Based on the test fixture code below, it connects to port 8000, but where is the corresponding server implementation?

Test fixture from sonic-mgmt:

@pytest.fixture(scope='function')
def platform_api_conn(duthosts, enum_rand_one_per_hwsku_hostname, start_platform_api_service):
    duthost = duthosts[enum_rand_one_per_hwsku_hostname]
    dut_ip = duthost.mgmt_ip

    conn = http.client.HTTPConnection(dut_ip, 8000)
    try:
        yield conn
    finally:
        conn.close()

def chassis_api(conn, name, args=None):
    if args is None:
        args = []
    conn.request('POST', '/platform/chassis/{}'.format(name), json.dumps({'args': args}))
    resp = conn.getresponse()
    res = json.loads(resp.read())['res']
    logger.info('Executing chassis API: "{}", arguments: "{}", result: "{}"'.format(name, args, res))
    return res