在Google Colaboratory机器上打开端口

Question

我做了一个机器学习谷歌协作，使用网络服务器来显示数据。但是我在运行的时候不能连接外网ip和端口，我想是因为端口没有打开。

我试着打开端口，但Google Colaboratory机器在docker上运行

if multiple_process:
    run(host="172.28.0.2", port=80, server='paste')
else:
    run(host="172.28.0.2", port=8080, server='paste')

Answer 1

Colab后端经过防火墙保护，无法通过公共互联网直接联系。

如果您的目标是从Colab前端连接到在后端运行的服务器，Colab会自动将请求代理到本地主机端口。这里的文档中提供了一个示例：

https://colab.research.google.com/notebooks/snippets/advanced_outputs.ipynb#scrollTo=_7dYIo63EdgL

重现下面的相关代码片段，它启动一个HTTP服务器，然后从单元输出中加载它：

import portpicker
import threading
import socket
import IPython

from six.moves import socketserver
from six.moves import SimpleHTTPServer

class V6Server(socketserver.TCPServer):
  address_family = socket.AF_INET6

class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):
  def do_GET(self):
    self.send_response(200)
    # If the response should not be cached in the notebook for
    # offline access:
    # self.send_header('x-colab-notebook-cache-control', 'no-cache')
    self.end_headers()
    self.wfile.write(b'''
      document.querySelector('#output-area').appendChild(document.createTextNode('Script result!'));
    ''')

port = portpicker.pick_unused_port()

def server_entry():
    httpd = V6Server(('::', port), Handler)
    # Handle a single request then exit the thread.
    httpd.serve_forever()

thread = threading.Thread(target=server_entry)
thread.start()

# Display some HTML referencing the resource.
display(IPython.display.HTML('<script src="https://localhost:{port}/"></script>'.format(port=port)))