A simple and minimalist CLI browser

browser.py

# Libraries
import requests
from bs4 import BeautifulSoup

class Browser:
    # Make HTTP GET request
    def fetch(self, url):
        # Try to fetch URL
        try:
            # Obtain HTML response
            response = requests.get(url)
            
            # Return response object
            return response
        
        # Return none if failed
        except:
            return None
    
    # Parse content and pretty print it to screen
    def parse(self, html):
        # Parse the content
        content = BeautifulSoup(html, 'lxml')
        
        # Loop over content tags recursively
        for tag in content.recursiveChildGenerator():
            # If found leaf node tag
            if tag.name is None:
                # And it's not empty
                if not tag.isspace():
                    # Extract parent tag name
                    parent = tag.parent.name
                    
                    # Ignore 'script', 'style' tags
                    if parent != 'script' and parent != 'style' and tag != 'html':
                        indent = ''
                        
                        # Calculate indentaion for each tag
                        for space in range(0, len([tag for tag in tag.parents])):
                            indent += ' '
                        
                        # Distinguish links from other tags 
                        if parent == 'a':
                            print(indent + '[' + tag.strip() + '] ' + '<' + tag.parent['href'] + '>')
                        else:
                            print(indent + tag.strip())
    
    # Download the file
    def download(self, filename, response):
        # Open file stream to write raw bytes
        with open(filename, 'wb') as download_file:
            
            # Loop over respone content
            for chunk in response.iter_content(chunk_size=128):
                # Write a chunk of data
                download_file.write(chunk)

    # Run browser loop
    def run(self):
        while True:
            # Init user input string
            user_input = input('browse > ')
            
            # Parse user input string
            try:
                # Extract user command
                command = user_input.split()[0]
                
                # Extract user URL
                url = user_input.split()[1]
                
                # Case "fetch" command
                if command == 'fetch':
                    print('Fetching URL: %s' % url)
                    # Fetch user URL
                    response = self.fetch(url)
                    
                    # Parse URL
                    try:                    
                        self.parse(response.text)
                    except:
                        print('Failed to fetch URL: %s' % url)
                        continue
            
                # Case "download" command
                elif command == 'download':
                    try:
                        # Init user filename
                        filename = user_input.split()[2]
                        
                        # Fetch user URL
                        response = self.fetch(url)
                        
                        # Download data from user URL
                        try:
                            print('Downloading data from URL: %s | PATH: "%s"' % (url, filename))
                            # Download file
                            self.download(filename, response)                       
                            print('Done')
                        except:
                            print('Failed to download data from URL: %s' % url)
                            continue
                        
                    except:
                        print('Download URL example: download https://github.com/maksimKorzh/one-time-scrapers/archive/master.zip ots.zip')
                        continue

                
            except:
                if user_input == 'exit':
                    break
                
                else:
                    print('Usage:')
                    print('Fetch URL example: fetch https://www.google.com/')
                    print('Download URL example: download https://github.com/maksimKorzh/one-time-scrapers/archive/master.zip ots.zip')
            

if __name__ == '__main__':
    browser = Browser()
    browser.run()