我使用python套接字编程创建了一个简单的Web服务器。当我使用套接字编程的客户端访问它时，会收到此响应（似乎不错）：
HTTP/1.0 200 OK
Content-Length: 145
Content-Type: text/html
"""<!DOCTYPE html>
<html>
<body>
<h2>HTML Links</h2>
<p><a href="https://www.w3schools.com/html/">Visit our HTML tutorial</a></p>
</body>
</html>"""
但是，当我尝试在浏览器中访问127.0.0.1:80时，它说：
127.0.0.1未发送任何数据。 ERR_EMPTY_RESPONSE
Web服务器代码：
import socket
import os
def get_content_type(filename):
index = filename.rfind('.')
extension = filename[index+1:len(filename)]
if(extension == 'txt' or extension == 'html'):
return 'Content-Type: text/html\n'
elif(extension == 'jpg'):
return 'Content Type: image/jpeg\n'
elif(extension == 'js'):
return 'Content Type: text/javascript; charset=UTF 8\n'
elif(extension == 'css'):
return 'Content Type: text/css\n'
pass
def check_client_request(client_request):
request_splitted = client_request.split()
if(len(request_splitted) != 3):
return False
if(request_splitted[0] != 'GET'):
return False
if(request_splitted[1].find('http://') != 0):
return False
if(request_splitted[1].count('/') < 3):
return False
if(request_splitted[2] != 'HTTP/1.1\\r\\n'):
return False
return True
def recieve_client_request(client_socket):
client_request = client_socket.recv(1024)
return client_request.decode('utf-8')
def handle_client_request(request):
try:
filename = request.split()[1].split('/')[3]
except:
return 'File not found'
if(filename == ''):
filename = 'index.html'
path = f'C:\\Users\\Eitan\\Desktop\\Python-Course\\SOCKETWEBSERVER\\{filename}'
print(path)
response = ''
if(os.path.isfile(path)):
try:
requested_file = open(path, 'r')
file_content = requested_file.read()
requested_file.close()
response = 'HTTP/1.0 200 OK\n'
content_length = len(file_content.encode('utf-8'))
response += f'Content-Length: {content_length}\n'
response += get_content_type(filename)
response += '\n'
response += f'"""{file_content}"""'
except:
response = 'HTTP/1.1 404 Not Found\n'
else:
response = 'HTTP/1.1 404 Not Found\n'
return response
def send_response(client_socket, response):
try:
client_socket.send(response.encode('utf-8'))
print('Response Sent')
except:
print('Couldnt send response.')
def main():
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('0.0.0.0', 80))
server_socket.listen(1)
while True:
client_socket = server_socket.accept()[0]
client_request = recieve_client_request(client_socket)
if(check_client_request(client_request)):
response = handle_client_request(client_request)
send_response(client_socket, response)
client_socket.close()
else:
client_socket.close()
if(__name__ == '__main__'):
main()
客户代码：
import socket
def main():
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(('127.0.0.1', 80))
request = input("Command: ").encode('utf-8')
client_socket.send(request)
response = client_socket.recv(1024)
print(response.decode('utf-8'))
if(__name__ == '__main__'):
main()
if(request_splitted[1].find('http://') != 0):
return False
您希望浏览器发送这样的请求
GET http://domain/page HTTP/1.1
...
但是，正常的HTTP请求不包括协议和主机，而仅包括页面，即，它看起来像这样
GET /page HTTP/1.1
...
由于将来自浏览器的有效请求视为无效，因此关闭了连接，因此没有响应发送到浏览器。
请注意，HTTP并非看起来那么简单。有一个实际的标准很长，在实现HTTP服务器或客户端时，您应该遵循该标准。