Is anyone else having problems with the webbrowser module?
Python 2.5.1c1 (release25-maint, Apr 12 2007, 21:00:25)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright" , "credits" or "license" for more information.
>>import webbrowser
webbrowser.op en('http://www.python.org' )
True
>>>
It opens firefox as expected, but the url is ...
file:///home/ron/%22http://www.python.org% 22
Which of course doesn't do what is expected.
Any ideas?
Ron
May 24 '07
14  2101 
Ron Adam wrote:
Paul Boddie wrote:
>On 25 May, 00:03, Ron Adam <r...@ronadam.c omwrote:
>>Is anyone else having problems with the webbrowser module?
Python 2.5.1c1 (release25-maint, Apr 12 2007, 21:00:25)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright" , "credits" or "license" for more information.
>>import webbrowser
>>webbrowser.op en('http://www.python.org' )
True
>>>
It opens firefox as expected, but the url is ...
file:///home/ron/%22http://www.python.org% 22
Since %22 is the URL-encoded double-quote character ("), I can only
imagine that something is quoting the URL for the shell, resulting in
the following command:
firefox '"http://www.python.org/"'
Or something similar, at least. Firefox 1.5 seems to refuse to open
such URLs, though.
Paul
Yes, thats it. I've traced it down the the subproccess.Pop en call.
This works
>>subprocess.Po pen(['firefox', 'http://python.org'])
<subprocess.Pop en object at 0xb7ddbeec>
This reproduces the problem I'm having.
>>subprocess.Po pen(['firefox', '"http://python.org"'])
<subprocess.Pop en object at 0xb7ddbf4c>
The quoting does happen in the webbrowser module.
The cmdline is passed as...
['/usr/lib/firefox/firefox', '"http://python.org"']
I've traced it back to the following line where self.args is ['"%s"']
Line 187 in webbrowser.py:
cmdline = [self.name] + [arg.replace("%s ", url)
for arg in self.args]
Now I just need to figure out why self.args is double quoted.
Got it.
It looks like the problem started when I told firefox to make itself
the default browser. That changed the way webbrowser.py figured out the
browser to use. So instead of trying them in order, it asked the gnome
configure tool for it.
def register_X_brow sers():
# The default Gnome browser
if _iscommand("gco nftool-2"):
# get the web browser string from gconftool
gc = 'gconftool-2 -g /desktop/gnome/url-handlers/http/command
2>/dev/null'
out = os.popen(gc)
commd = out.read().stri p()
retncode = out.close()
After this commd is:
'/usr/lib/firefox/firefox "%s"'
It's then split, but the quotes aren't removed. I'm not sure why this
doesn't show up in 2.6. Maybe it's been fixed there already.
Cheers,
Ron
Ron Adam wrote:
Got it.
It looks like the problem started when I told firefox to make itself
the default browser. That changed the way webbrowser.py figured out the
browser to use. So instead of trying them in order, it asked the gnome
configure tool for it.
def register_X_brow sers():
# The default Gnome browser
if _iscommand("gco nftool-2"):
# get the web browser string from gconftool
gc = 'gconftool-2 -g /desktop/gnome/url-handlers/http/command
2>/dev/null'
out = os.popen(gc)
commd = out.read().stri p()
retncode = out.close()
After this commd is:
'/usr/lib/firefox/firefox "%s"'
It's then split, but the quotes aren't removed. I'm not sure why this
doesn't show up in 2.6. Maybe it's been fixed there already.
A bit more follow up... so others can find this and avoid a lot of
debugging, head scratching, computer smashing or worse.
Reseting the default browser with the gnome default application window
confirmed this. The browser selection can either have the quotes around
the args "%s" paremteter, or not depending on how and what sets it.
Seems to me it should be quoted unless spaces in path names are never a
problem in Linux. So this could be both a python bug and a Gnome desktop
bug. Firefox probably does the right thing by putting the quotes around
it, but that causes problems for webbrowser.py, which doesn't expect them.
Since the python trunk (2.6) has been changed to get the browser name in a
different way, it won't be a problem for python 2.6.
To check the args parameter or reset the default browser in the gnome
desktop, use the gnome default application panel.
$ gnome-default-applications-properties
You can then either remove the extra quotes from the "%s" or reset the browser.
Cheers,
Ron
Ron Adam wrote:
>
Reseting the default browser with the gnome default application window
confirmed this. The browser selection can either have the quotes around
the args "%s" paremteter, or not depending on how and what sets it.
Seems to me it should be quoted unless spaces in path names are never a
problem in Linux. So this could be both a python bug and a Gnome desktop
bug. Firefox probably does the right thing by putting the quotes around
it, but that causes problems for webbrowser.py, which doesn't expect them.
Quoting arguments in the way described is the safe, easy option (with
some potential problems with ' characters that can be worked around),
and I imagine that it's done precisely because other applications
could pass a path with spaces as the URL, and that such applications
would be invoking the command in a shell environment. Sadly, this
conflicts with any other precautionary measures, causing a degree of
"overquotin g".
Resetting the GNOME default is a workaround, but I'm not convinced
that it would be satisfactory. What happens if you try and open an
HTML file, in the file browser or some other application which uses
the desktop preferences, where the filename contains spaces?
Paul
Paul Boddie wrote:
Ron Adam wrote:
>Reseting the default browser with the gnome default application window
confirmed this. The browser selection can either have the quotes around
the args "%s" paremteter, or not depending on how and what sets it.
Seems to me it should be quoted unless spaces in path names are never a
problem in Linux. So this could be both a python bug and a Gnome desktop
bug. Firefox probably does the right thing by putting the quotes around
it, but that causes problems for webbrowser.py, which doesn't expect them.
Quoting arguments in the way described is the safe, easy option (with
some potential problems with ' characters that can be worked around),
and I imagine that it's done precisely because other applications
could pass a path with spaces as the URL, and that such applications
would be invoking the command in a shell environment. Sadly, this
conflicts with any other precautionary measures, causing a degree of
"overquotin g".
Resetting the GNOME default is a workaround, but I'm not convinced
that it would be satisfactory. What happens if you try and open an
HTML file, in the file browser or some other application which uses
the desktop preferences, where the filename contains spaces?
I'm not sure how to test this. Most things I can think of call the web
browser directly. Maybe a link in an email?
Yes, it is a work around. The webbrowser module needs to be smarter about
quotes. As I said, this is fixed in 2.6 already. I emailed the module
maintainer, and will probably file a bug report too.
Ron
Paul Boddie wrote:
Ron Adam wrote:
>Reseting the default browser with the gnome default application window
confirmed this. The browser selection can either have the quotes around
the args "%s" paremteter, or not depending on how and what sets it.
Seems to me it should be quoted unless spaces in path names are never a
problem in Linux. So this could be both a python bug and a Gnome desktop
bug. Firefox probably does the right thing by putting the quotes around
it, but that causes problems for webbrowser.py, which doesn't expect them.
Quoting arguments in the way described is the safe, easy option (with
some potential problems with ' characters that can be worked around),
and I imagine that it's done precisely because other applications
could pass a path with spaces as the URL, and that such applications
would be invoking the command in a shell environment. Sadly, this
conflicts with any other precautionary measures, causing a degree of
"overquotin g".
Resetting the GNOME default is a workaround, but I'm not convinced
that it would be satisfactory. What happens if you try and open an
HTML file, in the file browser or some other application which uses
the desktop preferences, where the filename contains spaces?
I'm not sure how to test this. Most things I can think of call the web
browser directly. Maybe a link in an email?
Yes, it is a work around. The webbrowser module needs to be smarter about
quotes. As I said, this is fixed in 2.6 already. I emailed the module
maintainer, and will probably file a bug report too.
Ron This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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