[issue17967] urllib2.open failed to access a url when a perent directory of the url is permission denied

[zhaoqifa]

zhaoqifa added the comment:

Sorry for replying so late.
"1) Will the above change have any security implications."
---It does not seem to me either.

"2) On Ubuntu, I am unable to setup a directory based (ACL'ed) anonymous ftp 
server. The option is either anonymous from ftp root (/) which will map to my 
operating system folder (/srv/ftp) or non-anonymous. I wonder how your server 
is configured to allow anonymous from a particular point onwards."
---I configured proftpd like this:

DenyAll



AllowAll


And get message as bellow when login anonymous:
lftp perf00:~> cd /home
cd: Access failed: 550 /home: No such file or directory
lftp perf00:~> cd /home/work
cd ok, cwd=/home/work
lftp perf00:/home/work> cd /home/work/test
cd ok, cwd=/home/work/test
lftp perf00:/home/work/test> ls
drwxrwxr-x   8 work work 4096 Jun 15  2011 pb

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[issue17967] urllib2.open failed to access a url when a perent directory of the url is permission denied

[zhaoqifa]

New submission from zhaoqifa:

urllib2.open failed to access a url when a perent directory of the url is 
permission denied.

I had a file in a ftp, the address is like ftp://host/home/work/123.txt which 
can be access by wget.
When I urllib2.open to access the file, it always tell me that:
urllib2.URLError: 

I found that the path /home is denied for anonymouse access but the path 
/home/work is not. 
urllib2.open try to call ftp.cwd("home") and then ftp.cwd("work") which failed 
when ftp.cwd("home").

I tried to fix this by changing "for dir in self.dirs: self.ftp.cwd(dir)" to 
"self.ftp.cwd(os.path.join(*self.dirs)" in urllib.py. And it works fine for 
this situation.

--
messages: 189097
nosy: foxkiller
priority: normal
severity: normal
status: open
title: urllib2.open failed to access a url when a perent directory of the url 
is permission denied
type: behavior
versions: Python 2.7

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[issue17967] urllib2.open failed to access a url when a perent directory of the url is permission denied

[zhaoqifa]

Changes by zhaoqifa :


--
components: +Library (Lib)

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[issue17967] urllib2.open failed to access a url when a perent directory of the url is permission denied

[zhaoqifa]

zhaoqifa added the comment:

I had run test by python ./urllib.py -t, test steps for accessing /etc/passwd, 
file:/etc/passwd, file://localhost/etc/passwd passed, steps for 
ftp://ftp.gnu.org/pub/README not tested because my work env is not free for 
internet accessing.

And, I have not tried version 3.3.

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