HTTP&Web Servers——Udacity
HTTP response construction：
1.status code
2.header
3.response
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url construction：
scheme://hostname/path
such as : http://example.net/google.com/ponies
http->scheme;example.net->hostname ; /google.com/ponies ->path
hostname ->DNS -> IP
port is a part of hostname
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HTTP methods
GET , POST
PUT ,DELECT ,PATCH
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python
lib : http.server
function:
do_http-methods()-> client send you a http method (for example : GET) , the server use do_GET function to deal with the get request.
HTTPServer(server_address , BaseHTTPRequestHandler) -> create a server.
HTTPServer . serve_forever() -> run a HTTPServer Object forever.
.read() ; .write() ; decode() ; encode() ; str.format () ; send_header() ; send_response() ; parse_qs()
#!/usr/bin/env python3 # # An HTTP server that's a message board. 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 and parse the message data = self.rfile.read(length).decode() message = parse_qs(data)["message"][0] # Escape HTML tags in the message so users can't break world+dog. message = message.replace("<", "<") # Store it in memory. memory.append(message) # Send a 303 back to the root page self.send_response(303) # redirect via GET self.send_header('Location', '/') 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() # Send the form with the messages in it. mesg = form.format("\n".join(memory)) self.wfile.write(mesg.encode()) if __name__ == '__main__': server_address = ('', 8000) httpd = HTTPServer(server_address, MessageHandler) httpd.serve_forever()
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JSON - > dictionary
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cache
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cookies
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web security - > https -> http/1.1 - > http/2
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Other : TCP TLS SSL
cloud: 链接：https://pan.baidu.com/s/1snqiu4l 密码：dtnn
