为什么 chrome 无法从我的幼稚服务器接收文件？

如何解决为什么 chrome 无法从我的幼稚服务器接收文件？

我想检查一下我对 HTTP 的理解，写了一个非常简单的服务器来监听 localhost:4567，如果有人向这个地址发送 HTTP 请求，它会将 index.html 发送回客户端。

>

#import socket module
from socket import *
import sys # In order to terminate the program

serverSocket = socket(AF_INET,SOCK_STREAM) #Prepare a sever socket
host = "localhost"
port = 4567
serverSocket.bind((host,port))
serverSocket.listen(5)


#Establish the connection 
print('Ready to serve...') 
connectionSocket,addr = serverSocket.accept()
print("accept from ",addr)
try:
    message = connectionSocket.recv(1024).decode()
    print(message)
    filename = message.split()[1][1:] # a dirty way to get index.html from "GET /index.html HTTP/1.1"
    with open(filename) as f:
        outputdata = f.read()
    #Send one HTTP header line into socket
    connectionSocket.sendall("HTTP/1.1 200 ok\r\n".encode())
    #Send the content of the requested file to the client 
    for i in range(0,len(outputdata)):
        connectionSocket.send(outputdata[i].encode()) 
    connectionSocket.send("\r\n".encode())
except IOError:
    #Send response message for file not found
    print("file not find")
    connectionSocket.sendall("HTTP/1.1 404 not found\r\n".encode())
    connectionSocket.send("\r\n".encode())
connectionSocket.close()


serverSocket.close()
sys.exit()#Terminate the program after sending the corresponding data

但是当我认为一切正常并在 chrome 中输入 http://localhost:4567/index.html 时，chrome 大喊它无法访问该网站并且 localhost 拒绝了请求。但是当我尝试打印一些日志时，我发现我的简单服务器实际上接受了来自 chrome 的请求并将消息发送回 chrome。我的实现有什么问题？