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--- informatica:lenguajes_de_programacion:python:python_urrlib [2026/01/29 16:25] – admin
+++ informatica:lenguajes_de_programacion:python:python_urrlib [2026/02/01 05:58] (actual) – admin
@@ Línea 1: / Línea 1: @@
 ====== 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>