Simple HTTP Server and Client in Python
2014-05-09 22:09
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This time I'd like to show you how to make a simple HTTP server and client in python. It's a bit different from other tutorials I've ever wrote and I'd like to say that I'm also a beginner
in python. But, I'll try to make sure you understand what I wrote because this tutorial is easy.
First, you need to know what HTTP is. Definition of HTTP based on wikipedia:
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is
the foundation of data communication for the World Wide Web.
In simple words, HTTP is a protocol that used for world wide web communication. So, if you're browsing the web, downloading data, and hosting a website, you're using HTTP protocol. There are
many web server software that support HTTP protocol such as apache, nginx, and lighttpd.
This time, you're so lucky because I'll show you how to make something like that (a simple version of course) in python language.
Step #1: Write HTTP server script using BaseHTTPServer module
Luckily, python provide us an HTTP server module, it's called
We use two classes from this module, namely
We also need to use os module to access file in your system.
First, we need to import those modules
Next, write a custom class namely
implement
In this tutorial, I just implement GET command from HTTP. To do that, we need to override
Our objective is to request an HTML file from server using our client (explained int the next step). Script inside
is written to handle our objective.
Finally, add following script to run the server
Save it and name it whatever you want (e.g, kodefun-httpserver.py).
Here is the complete script of http server:
Step #2: Write a simple HTTP client
To check if our server is working fine, we need an HTTP client. You can use your web browser to do this. But, It'll be cool if you make your own client. To accomplish this, let's make another script, let's name it kodefun-httpclient.py.
Copy following script to your file:
Step #3: Test using GET command
The final step, we'll test is our scripts above work just fine. To run the server, type the following command in your command prompt or terminal:
If there is no problem, you'll see "http server is running...". Next, we need to create a dummy HTML file, let's call it dummy.html and copy the code below:
Save it to your root folder defined in your script. In this example I use c:/xampp/htdocs/.
Next, we need to run the client, type following command to run the client:
When the client is running type following code to get dummy.html file:
If there is no problem, and it should be no problem, you'll see the content of dummy.html file.
That's all I can do this time. My upcoming tutorial is how to perform face detection using Accord.NET. Stay tune and keep fighting!!!
in python. But, I'll try to make sure you understand what I wrote because this tutorial is easy.
First, you need to know what HTTP is. Definition of HTTP based on wikipedia:
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is
the foundation of data communication for the World Wide Web.
In simple words, HTTP is a protocol that used for world wide web communication. So, if you're browsing the web, downloading data, and hosting a website, you're using HTTP protocol. There are
many web server software that support HTTP protocol such as apache, nginx, and lighttpd.
This time, you're so lucky because I'll show you how to make something like that (a simple version of course) in python language.
Step #1: Write HTTP server script using BaseHTTPServer module
Luckily, python provide us an HTTP server module, it's called
BaseHTTPServer.
We use two classes from this module, namely
BaseHTTPRequestHandlerand
HTTPServer.
We also need to use os module to access file in your system.
First, we need to import those modules
#!/usr/bin/env python from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer import os
Next, write a custom class namely
KodeFunHTTPRequestHandlerthat
implement
BaseHTTPRequestHandler.
#Create custom HTTPRequestHandler class class KodeFunHTTPRequestHandler(BaseHTTPRequestHandler):
In this tutorial, I just implement GET command from HTTP. To do that, we need to override
do_GET()function.
Our objective is to request an HTML file from server using our client (explained int the next step). Script inside
do_GET()function
is written to handle our objective.
#handle GET command def do_GET(self): rootdir = 'c:/xampp/htdocs/' #file location try: if self.path.endswith('.html'): f = open(rootdir + self.path) #open requested file #send code 200 response self.send_response(200) #send header first self.send_header('Content-type','text-html') self.end_headers() #send file content to client self.wfile.write(f.read()) f.close() return except IOError: self.send_error(404, 'file not found')
Finally, add following script to run the server
def run(): print('http server is starting...') #ip and port of servr #by default http server port is 80 server_address = ('127.0.0.1', 80) httpd = HTTPServer(server_address, KodeFunHTTPRequestHandler) print('http server is running...') httpd.serve_forever() if __name__ == '__main__': run()
Save it and name it whatever you want (e.g, kodefun-httpserver.py).
Here is the complete script of http server:
#!/usr/bin/env python from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer import os
#Create custom HTTPRequestHandler class class KodeFunHTTPRequestHandler(BaseHTTPRequestHandler):
#handle GET command def do_GET(self): rootdir = 'c:/xampp/htdocs/' #file location try: if self.path.endswith('.html'): f = open(rootdir + self.path) #open requested file #send code 200 response self.send_response(200) #send header first self.send_header('Content-type','text-html') self.end_headers() #send file content to client self.wfile.write(f.read()) f.close() return except IOError: self.send_error(404, 'file not found')
def run(): print('http server is starting...') #ip and port of servr #by default http server port is 80 server_address = ('127.0.0.1', 80) httpd = HTTPServer(server_address, KodeFunHTTPRequestHandler) print('http server is running...') httpd.serve_forever() if __name__ == '__main__': run()
Step #2: Write a simple HTTP client
To check if our server is working fine, we need an HTTP client. You can use your web browser to do this. But, It'll be cool if you make your own client. To accomplish this, let's make another script, let's name it kodefun-httpclient.py.
Copy following script to your file:
#!/usr/bin/env python import httplib import sys #get http server ip http_server = sys.argv[1] #create a connection conn = httplib.HTTPConnection(http_server) while 1: cmd = raw_input('input command (ex. GET index.html): ') cmd = cmd.split() if cmd[0] == 'exit': #tipe exit to end it break #request command to server conn.request(cmd[0], cmd[1]) #get response from server rsp = conn.getresponse() #print server response and data print(rsp.status, rsp.reason) data_received = rsp.read() print(data_received) conn.close()
Step #3: Test using GET command
The final step, we'll test is our scripts above work just fine. To run the server, type the following command in your command prompt or terminal:
python kodefun-httpserver.py
If there is no problem, you'll see "http server is running...". Next, we need to create a dummy HTML file, let's call it dummy.html and copy the code below:
<head> <title>Dummy HTML</title> </head> <body> <h1>Kode Fun is Awesome</h1> <h1>You're awesome</h1> </body>
Save it to your root folder defined in your script. In this example I use c:/xampp/htdocs/.
Next, we need to run the client, type following command to run the client:
python kodefun-httpclient.py 127.0.0.1
When the client is running type following code to get dummy.html file:
GET dummy.html
If there is no problem, and it should be no problem, you'll see the content of dummy.html file.
That's all I can do this time. My upcoming tutorial is how to perform face detection using Accord.NET. Stay tune and keep fighting!!!
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