WIKI de apuntes de Billy Rondón

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====== Python UrlLib ======

  * [[https://stackabuse.com/guide-to-sending-http-requests-in-python-with-urllib3/]]

| **Informational codes**                        | (between 100 and 199)                               |
| **Successful codes**                           | (between 200 and 299) - 200 is the most common one  |
| **Redirect codes**                             | (between 300 and 399)                               |
| **Client error codes**                         | (between 400 and 499) - 404 is the most common one  |
| **Server error codes**                         | (between 500 and 599) - 500 is the most common one  |


<code python>

import urllib.request
import shutil
#headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0'}
headers = {'User-Agent': 'Mozilla/5.0 (Linux; Android 16; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.12.45 Mobile Safari/537.36')
request = urllib.request.Request("<url>", headers=headers)
r = urllib.request.urlopen(request).read()
#print(r.decode('utf-8'))
#with open("R.json", 'w') as out:
#   shutil.copyfileobj(r, out)
with open('T.json', 'wb') as file:
   file.write(r)

</code>

<code python>

import urllib.request
import shutil



#proxy_address = 'http://45.186.6.104:3128'
#proxy_address = 'http://96.126.117.23:80'
#proxies = {'http': proxy_address, 'https': proxy_address}
#proxy_handler = urllib.request.ProxyHandler(proxies)
#opener = urllib.request.build_opener(proxy_handler)
#urllib.request.install_opener(opener)


headers = {'User-Agent': 'PostmanRuntime/7.51.0',
            'Charsets':'utf-8',
            'Accept':'*/*'}#'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0'}
request = urllib.request.Request("<URL>", headers=headers)
r = urllib.request.urlopen(request).read()
#print(r.decode('utf-8'))
#with open("R.json", 'w') as out:
#   shutil.copyfileobj(r, out)
with open('T.json', 'wb') as file:
   file.write(r)


</code>


<code python>

import urllib.request

import urllib.error

import shutil
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0'}

import json

def is_valid_json(myjson_string):
    """
    Checks if a string is a valid JSON document.
    """
    try:
        json.loads(myjson_string)
    except json.JSONDecodeError as e:
        # print(f"Invalid JSON: {e}") # Optional: print error details
        return False
    except TypeError as e:
        # Caters to cases where input might be None, not a string
        return False
    return True



import http.server
import socketserver

PORT = 8000

class CustomHandler(http.server.SimpleHTTPRequestHandler):
    def do_POST(self):
        
        content_length = int(self.headers['Content-Length'])
        
        post_data = self.rfile.read(content_length)
        
        #print(f"Received POST data: {post_data.decode('utf-8')}")
        
        url = post_data.decode('utf-8')

        request = urllib.request.Request( url , headers=headers)
        
        try:
        r = urllib.request.urlopen(request)	

	
        #if r.getcode() == 200:
        #   if is_valid_json( r.read() ) == True:
        #      self.send_header('Content-type', 'text/html')
        #   else:
        #      self.send_header('Content-type', 'text/json')

        self.send_response( r.getcode() )



        self.send_header('Content-type', 'text/json')
        self.end_headers()
        
        response_message = r.read() #b"POST request received successfully! " + 
        self.wfile.write(response_message)
        
        except urllib.error.HTTPError as err:
            print(f'An HTTP error occurred: {err}')

try:
#try:
with socketserver.TCPServer(("", PORT), CustomHandler) as httpd:
    print(f"Serving at port {PORT}, ready to handle POST requests")
    httpd.serve_forever()

#except urllib.error.HTTPError as err:
#    print(f'A HTTPError was thrown: {err.code} {err.reason}')

</code>