[utils] Rework URL path munging for ., .. components

* move processing to YoutubeDLHandler
* also process `Location` header for redirect
* use tests from https://github.com/yt-dlp/yt-dlp/pull/7662

youtube_dl/YoutubeDL.py

@@ -71,7 +71,6 @@ from .utils import (
     format_bytes,
     formatSeconds,
     GeoRestrictedError,
-    HEADRequest,
     int_or_none,
     ISO3166Utils,
     join_nonempty,
@@ -88,7 +87,6 @@ from .utils import (
     preferredencoding,
     prepend_extension,
     process_communicate_or_kill,
-    PUTRequest,
     register_socks_protocols,
     render_table,
     replace_extension,
@@ -2460,27 +2458,6 @@ class YoutubeDL(object):
         """ Start an HTTP download """
         if isinstance(req, compat_basestring):
             req = sanitized_Request(req)
-        # an embedded /../ sequence is not automatically handled by urllib2
-        # see https://github.com/yt-dlp/yt-dlp/issues/3355
-        url = req.get_full_url()
-        parts = url.partition('/../')
-        if parts[1]:
-            url = compat_urllib_parse.urljoin(parts[0] + parts[1][:1], parts[1][1:] + parts[2])
-        if url:
-            # worse, URL path may have initial /../ against RFCs: work-around
-            # by stripping such prefixes, like eg Firefox
-            parts = compat_urllib_parse.urlsplit(url)
-            path = parts.path
-            while path.startswith('/../'):
-                path = path[3:]
-            url = parts._replace(path=path).geturl()
-            # get a new Request with the munged URL
-            if url != req.get_full_url():
-                req_type = {'HEAD': HEADRequest, 'PUT': PUTRequest}.get(
-                    req.get_method(), compat_urllib_request.Request)
-                req = req_type(
-                    url, data=req.data, headers=dict(req.header_items()),
-                    origin_req_host=req.origin_req_host, unverifiable=req.unverifiable)
         return self._opener.open(req, timeout=self._socket_timeout)
 
     def print_debug_header(self):