gh-113471: adds custom default content-type to http.server

Lib/http/server.py

@@ -263,6 +263,7 @@ class BaseHTTPRequestHandler(socketserver.StreamRequestHandler):
     # the client gets back when sending a malformed request line.
     # Most web servers default to HTTP 0.9, i.e. don't send a status line.
     default_request_version = "HTTP/0.9"
+    default_content_type = "application/octet-stream"
 
     def parse_request(self):
         """Parse a request (internal).
@@ -892,15 +893,10 @@ def guess_type(self, path):
 
         """
         base, ext = posixpath.splitext(path)
-        if ext in self.extensions_map:
-            return self.extensions_map[ext]
-        ext = ext.lower()
-        if ext in self.extensions_map:
-            return self.extensions_map[ext]
-        guess, _ = mimetypes.guess_type(path)
-        if guess:
-            return guess
-        return 'application/octet-stream'
+        guess = self.extensions_map.get(ext,
+                self.extensions_map.get(ext.lower(),
+                mimetypes.guess_type(path)[0]))
+        return guess or self.default_content_type
 
 
 # Utilities for CGIHTTPRequestHandler
@@ -1256,14 +1252,16 @@ def _get_best_family(*address):
 
 def test(HandlerClass=BaseHTTPRequestHandler,
          ServerClass=ThreadingHTTPServer,
-         protocol="HTTP/1.0", port=8000, bind=None):
+         protocol="HTTP/1.0", port=8000, bind=None,
+         content_type=BaseHTTPRequestHandler.default_content_type):
     """Test the HTTP request handler class.
 
     This runs an HTTP server on port 8000 (or the port argument).
 
     """
     ServerClass.address_family, addr = _get_best_family(bind, port)
     HandlerClass.protocol_version = protocol
+    HandlerClass.default_content_type = content_type
     with ServerClass(addr, HandlerClass) as httpd:
         host, port = httpd.socket.getsockname()[:2]
         url_host = f'[{host}]' if ':' in host else host
@@ -1294,6 +1292,9 @@ def test(HandlerClass=BaseHTTPRequestHandler,
                         default='HTTP/1.0',
                         help='conform to this HTTP version '
                              '(default: %(default)s)')
+    parser.add_argument('-c', '--content-type',  # parsed into content_type
+                        default=BaseHTTPRequestHandler.default_content_type,
+                        help='sets default content type for unknown extensions')
     parser.add_argument('port', default=8000, type=int, nargs='?',
                         help='bind to this port '
                              '(default: %(default)s)')
@@ -1323,4 +1324,5 @@ def finish_request(self, request, client_address):
         port=args.port,
         bind=args.bind,
         protocol=args.protocol,
+        content_type=args.content_type
     )

Misc/NEWS.d/next/Library/2023-12-25-19-14-07.gh-issue-113471.ZQMpbI.rst

@@ -0,0 +1 @@
+Adds ability to set default content-type for no extension/unrecognized extension on http.server module.