Question

我是Web服务器的新手，我尝试使用python中的http.server模块构建一个简单的服务器。我正在使用显示表单的本地服务器，通过提交此表单，它应该重定向以显示消息，因此我使用了send_response(303)，但没有重定向到主页，而是发送了200条响应。

from http.server import HTTPServer, BaseHTTPRequestHandler
from urllib.parse import parse_qs

memory = []

form = '''<!DOCTYPE html>
  <title>Message Board</title>
  <form method="POST">
    <textarea name="message"></textarea>
    <br>
    <button type="submit">Post it!</button>
  </form>
  <pre>
{}
  </pre>
'''


class MessageHandler(BaseHTTPRequestHandler):
    def do_POST(self):
        # How long was the message?
        length = int(self.headers.get('Content-length', 0))

        # Read the correct amount of data from the request.
        data = self.rfile.read(length).decode()
        # Extract the "message" field from the request data.
        message = parse_qs(data)["message"][0]

        # Escape HTML tags in the message so users can't break world+dog.
        message = message.replace("<", "&lt;")

        # Store it in memory.
        memory.append(message)

        # 1. Send a 303 redirect back to the root page.
        self.send_response(303)
        self.send_header('Content-type', 'text/html; charset=utf-8')
        self.send_header('Location', '/') #This will navigate to the original page
        self.end_headers()

    def do_GET(self):
        # First, send a 200 OK response.
        self.send_response(200)

        # Then send headers.
        self.send_header('Content-type', 'text/html; charset=utf-8')
        self.end_headers()

        # 2. Put the response together out of the form and the stored messages.
        response = ""
        for message in memory:
          response += f"{message}\n"

        # 3. Send the response.
        self.wfile.write(form.format(response).encode())

if __name__ == '__main__':
    server_address = ('', 8000)
    httpd = HTTPServer(server_address, MessageHandler)
    httpd.serve_forever()

Answer 1

我认为这按您的预期进行。

这是通话记录

127.0.0.1 - - [26/Feb/2020 10:42:23] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [26/Feb/2020 10:42:23] "GET /favicon.ico HTTP/1.1" 200 -
127.0.0.1 - - [26/Feb/2020 10:42:39] "POST / HTTP/1.1" 303 -
127.0.0.1 - - [26/Feb/2020 10:42:39] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [26/Feb/2020 10:42:39] "GET /favicon.ico HTTP/1.1" 200 -

当您执行POST时，它返回303，当浏览器收到它触发另一个GET请求时，服务器以200响应

do_POST发送200响应而不是303

1 个答案: