text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  #
  # File: tools/test_max_websocket_uri_length.py
  #
  # Part of ‘UNICORN Binance WebSocket API’
  # Project website: https://github.com/oliver-zehentleitner/unicorn-binance-websocket-api
  # Documentation: https://oliver-zehentleitner.github.io/unicorn-binance-websocket-api
  # PyPI: https://pypi.org/project/unicorn-binance-websocket-api/
  #
  # Author: Oliver Zehentleitner
  #         https://about.me/oliver-zehentleitner
  #
  # Copyright (c) 2019, Oliver Zehentleitner
  # All rights reserved.
  #
  # Permission is hereby granted, free of charge, to any person obtaining a
  # copy of this software and associated documentation files (the
  # "Software"), to deal in the Software without restriction, including
  # without limitation the rights to use, copy, modify, merge, publish, dis-
  # tribute, sublicense, and/or sell copies of the Software, and to permit
  # persons to whom the Software is furnished to do so, subject to the fol-
  # lowing conditions:
  #
  # The above copyright notice and this permission notice shall be included
  # in all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  # IN THE SOFTWARE.
  
  from websocket import create_connection
  import websocket
  import time
  
  
  def binance_test_uri_length(query):
      websocket = create_connection("wss://stream.binance.com:9443/stream?streams=" + query)
      while True:
          result = websocket.recv()
          websocket.close()
          print("Received '%s'\r\n" % result)
          break
  
  
  markets = ['bnbbtc', 'ethbtc', 'btcusdt', 'bchabcusdt', 'xrpusdt', 'rvnbtc', 'ltcusdt', 'adausdt', 'eosusdt',
             'neousdt', 'bnbusdt', 'adabtc', 'ethusdt', 'trxbtc', 'trxbtc', 'bchabcbtc', 'ltcbtc', 'xrpbtc',
             'ontbtc', 'bttusdt', 'eosbtc', 'xlmbtc', 'bttbtc', 'tusdusdt', 'xlmusdt', 'qkcbtc', 'zrxbtc',
             'neobtc', 'adaeth', 'icxusdt', 'btctusd', 'icxbtc', 'btcusdc', 'wanbtc', 'zecbtc', 'wtcbtc',
             'batbtc', 'adabnb', 'etcusdt', 'qtumusdt', 'xmrbtc', 'trxeth', 'adatusd', 'trxxrp', 'trxbnb',
             'dashbtc', 'rvnbnb', 'bchabctusd', 'etcbtc', 'bnbeth', 'ethpax', 'nanobtc', 'xembtc', 'xrpbnb',
             'bchabcpax', 'xrpeth', 'bttbnb', 'ltcbnb', 'agibtc', 'zrxusdt', 'xlmbnb', 'ltceth', 'eoseth',
             'ltctusd', 'polybnb', 'scbtc', 'steembtc', 'trxtusd', 'npxseth', 'kmdbtc', 'polybtc', 'gasbtc',
             'engbtc', 'zileth', 'xlmeth', 'eosbnb', 'xrppax', 'lskbtc', 'npxsbtc', 'xmrusdt', 'ltcpax', 'xmrusdt',
             'ethtusd', 'batusdt', 'mcobtc', 'neoeth', 'bntbtc', 'eostusd', 'lrcbtc', 'funbtc', 'zecusdt',
             'bnbpax', 'linkusdt', 'hceth', 'zrxeth', 'icxeth', 'xmreth', 'neobnb', 'etceth', 'zeceth', 'xmrbnb',
             'wanbnb', 'zrxbnb', 'agibnb', 'funeth', 'arketh', 'engeth']
  
  channels = ['trade', 'kline_1m', 'kline_5m', 'kline_15m', 'kline_30m', 'kline_1h', 'kline_12h', 'depth5']
  
  streams = []
  for market in markets:
      for channel in channels:
          streams.append(market + "@" + channel)
  
  print("generated stream items:", len(streams), "\r\n")
  
  query = ""
  round = 0
  #start_testing = int(input("start at round (try 484): "))
  start_testing = 484
  if start_testing != "":
      for stream in streams:
          if round < len(streams):
              query += stream + "/"
              if round >= start_testing:
                  print("round:", round)
                  try:
                      binance_test_uri_length(query)
                  except websocket._exceptions.WebSocketBadStatusException as error_msg:
                      print("error_msg:", error_msg)
                      print("uri length:", str(len("wss://stream.binance.com:9443/stream?streams=" + query)))
                      print("query:")
                      print(query)
                      if "Large" in str(error_msg):
                          print("\r\nfound too long URI!")
                          break
                  time.sleep(11)
              round += 1
  
  print("\r\nstart shorting the URI:")
  while True:
      shorted_query = query[:-1]
      try:
          binance_test_uri_length(shorted_query)
          print("\r\nfound first valid URI length before URI too long error")
          print("longest valid URI length:", str(len("wss://stream.binance.com:9443/stream?streams=" + shorted_query)))
          print("longest valid URI string:")
          print("wss://stream.binance.com:9443/stream?streams=" + shorted_query)
          exit(0)
      except websocket._exceptions.WebSocketBadStatusException as error_msg:
          pass
  
      time.sleep(11)
  
  
  