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File Sharing App using Python
  • Last Updated : 25 Feb, 2021

Computer Networks is an important topic and to understand the concepts, practical application of the concepts is needed. In this particular article, we will see how to make a simple file-sharing app using Python.  An HTTP Web Server is software that understands URLs (web address) and HTTP (the protocol used to view webpages). Python has several packages which is a collection of modules. And it has several built-in servers. The modules used in this project are:

  • The HTTPServer is a socketserver, which creates and listens at the HTTP socket.
  • The socketserver modules simplify the task of writing network servers.
  • The webbrowser module provides us with a high-level interface to allow and display Web-based documents, simply calling the open() function.
  • The pyqrcode module is used to generate QR Code in just two lines of code.
  • OS module helps for interacting with the operating system. Used for opening files, manipulate paths, and read all lines in all the files on the command line.
  • PyPNG allows PNG image files to be read and written using pure Python

Step-by-step Approach:

  • Install third-party modules:
pip install pyqrcode
pip install pypng
  • Install the dependencies using pip install at the command line.
  • Importing necessary modules:
    • http.server and socketserver: To host in the browser.
    • pyqrcode: To generate QRcode.
    • png: To convert the QRCode into a png file.
    • OS: To interact with the Operating system.
  • Assign port and name of the user.
  • Find Ip address of the PC and convert it to a QR code.
  • Create the HTTP request.
  • Display the QR code in browser.

Implementation of the above Approach:

Python3




# import necessary modules
  
# for implementing the HTTP Web servers
import http.server
  
# provides access to the BSD socket interface
import socket
  
# a framework for network servers
import socketserver
  
# to display a Web-based documents to users
import webbrowser
  
# to generate qrcode
import pyqrcode
from pyqrcode import QRCode
  
# convert into png format
import png
  
# to access operating system control
import os
  
  
# assinging the appropriate port value
PORT = 8010
# this finds the name of the computer user
os.environ['USERPROFILE']
  
  
# changing the directory to access the files desktop
# with the help of os module
desktop = os.path.join(os.path.join(os.environ['USERPROFILE']),
                       'OneDrive')
os.chdir(desktop)
  
  
# creating a http request
Handler = http.server.SimpleHTTPRequestHandler
# returns, host name of the system under
# which Python interpreter is executed
hostname = socket.gethostname()
  
  
# finding the IP address of the PC
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("8.8.8.8", 80))
IP = "http://" + s.getsockname()[0] + ":" + str(PORT)
link = IP
  
  
# converting the IP address into the form of a QRcode
# with the help of pyqrcode module
  
# converts the IP address into a Qrcode
url = pyqrcode.create(link)
# saves the Qrcode inform of svg
url.svg("myqr.svg", scale=8)
# opens the Qrcode image in the web browser
webbrowser.open('myqr.svg')
  
  
# Creating the HTTP request and  serving the
# folder in the PORT 8010,and the pyqrcode is generated
  
# continuous stream of data between client and server
with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print("serving at port", PORT)
    print("Type this in your Browser", IP)
    print("or Use the QRCode")
    httpd.serve_forever()

Output:

  • Open the python file which has the above code on PC.
  • This will generate a QR-code.

  • Either Scan the QR-code or type the IP Address shown in the python shell in your mobile browser.



  • Share the files with ease by scanning the QR-code that’s generated and get access to the files in PC, from the mobile browser.

Demonstration:

Why Port 8010 ? 

TCP Port 8010 use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. This is secured and is not infected by Virus/Trojan.

Explanation:

  • The code finds the name of the USERPROFILE through OS module. And changes the directory to access the files on the desktop.
  • Finds the hostname to serve the file in a particular port for secured sharing.
  • Then finds the IP address of the system so that we can connect a particular device.
  • The IP address is converted into the form of QR-code using the module pyqrcode for easy use.
  • The generated image is hosted in a web browser.
  • Once the device connected to the same network either scanned QR code or type the IP address can access the files of the system.

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