Terry J. Reedy added the comment:
The regression issue is red herring. An issue should propose new behavior
(based on an understanding of the doc and actual current behavior). Then ask:
"Is the proposed behavior better than the current behavior?", and "Is the
current behavior a bug?". After reading the doc and the code, I am convinced
that current behavior is close to the implied wanted behavior, and that it is
not a bug.
The doc says
webbrowser.open(url, new=0, autoraise=True)
Display url using the default browser.
What does 'default browswer' mean? Near the top, the doc says "If the
environment variable BROWSER exists, it is interpreted to override the platform
default list of browsers,". So the 'default browser' is actually the 'default
browser list'. What open() does is to try each in turn and stop when one says
it succeeded. So the doc should say 'using the first default browser that
claims to succeed.'
What does 'default browser list' mean? It depends on the platform *and* the
software loaded on the particular machine when webbrowser is first imported in
a particular instance of the interpreter. The 'platform' part is in the quote
above, the rest is not. I will open a separate doc issue.
On Windows, the list starts with 'default Windows browser', which calls
os.startfile(), which, I believe, does call the user default browser. Next is
Internet Explorer -- if available at that time on the particular machine! If
the user-default browser rejects the url, then IE is tried.
On my win7 machine today, I have Firefox the default and IE available. Firefox
rejects 127.0.0.1:8080 with an 'Unable to connect' error box. IE 'accepts' it
in the sense that it displays an information starting 'The webpage cannot be
displayed'. For 'invalid.xxx', IE displays the page for a German domain
registrar. I strongly suspect that the change Anatoly saw was a difference in
IE, out of Python's control.
Georg, if you think I got it wrong, please correct.
----------
nosy: +terry.reedy
resolution: -> invalid
status: open -> closed
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<http://bugs.python.org/issue8936>
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