The simplest HTTP server with traffic control in history

S. py

import timeimport SimpleHTTPServerimport SocketServerBYTES_PER_SECOND=160*1024class MyHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):    def do_GET(self):        """Serve a GET request."""        f = self.send_head()        if f:            self.copyfileobj(f, self.wfile)            f.close()    def copyfileobj(self,fsrc, fdst, length=16*1024):        """copy data from file-like object fsrc to file-like object fdst"""        count = 0        t1 = time.time()        while 1:            buf = fsrc.read(length)            if not buf:                break            fdst.write(buf)            count += len(buf)            if count >= BYTES_PER_SECOND:                count = 0                delay = 1.0 - (time.time() - t1)                if delay > 0.0:                    time.sleep(delay)                t1 = time.time()                PORT = 8000Handler = MyHTTPRequestHandlerhttpd = SocketServer.TCPServer(("127.0.0.1", PORT), Handler)print "serving at port", PORThttpd.serve_forever()

Yes, that's it! A total of 30 lines of code. Bytes_per_second is used to specify the maximum number of bytes transmitted per second. 127.0.0.1 is the IP address that the server listens. 8000 is the port listened by the HTTP server.

This is why writing a python program is a pleasure. Python, known as battery include, is a popular python.

 

However, Python also gives a misunderstanding that it can only write simple programs. It is actually a very big misunderstanding that I cannot write a program on the top.

 

With dnsserver, the 30-line program can be used as a good environment for upgrading the trial environment.

 

In addition, if the port number is less than 1000 in Linux, the execution of the program requires system permissions. Otherwise, an exception is thrown.