ikai, you bet your money correctly. we confirmed your diagnose. The pain
point, though, is that there are quite a few popular feed service providers
having these kind of problems. sorry for replying  back to you late.

On Sat, Nov 21, 2009 at 3:40 AM, Ikai L (Google) <ika...@google.com> wrote:

> It looks like there may be an issue with feedsky and responding to
> "Accepts-Encoding: gzip" header. I changed urlfetch to work like this:
>
> content = urlfetch.fetch(url, headers={ "Accept-Encoding" : "identity" })
>
> It has not failed on me once. I also tried the following experiments. I'm
> just using straight curl here, no fancy programs. Note how I am cut off
> sometimes:
>
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   100k      0  0:00:01  0:00:01 --:--:--
> 127k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 133k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 133k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 132k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 132k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 133k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
>  21  180k   21 39886    0     0   6885      0  0:00:26  0:00:05
> 0:00:21     0
> curl: (18) transfer closed with 145287 bytes remaining to read
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 132k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: gzip"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
>  21  180k   21 39886    0     0   6879      0  0:00:26  0:00:05
> 0:00:21     0
> curl: (18) transfer closed with 145287 bytes remaining to read
>
> Here's the same test passing a different "Accept-Encoding" header:
>
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   115k      0  0:00:01  0:00:01 --:--:--
> 154k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   103k      0  0:00:01  0:00:01 --:--:--
> 132k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   115k      0  0:00:01  0:00:01 --:--:--
> 155k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   104k      0  0:00:01  0:00:01 --:--:--
> 133k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   116k      0  0:00:01  0:00:01 --:--:--
> 155k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   116k      0  0:00:01  0:00:01 --:--:--
> 153k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   115k      0  0:00:01  0:00:01 --:--:--
> 154k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0  99141      0  0:00:01  0:00:01 --:--:--
> 121k
> compu...@computer:/tmp$ curl -i -H "Accept-Encoding: identity"
> http://feed.feedsky.com/qiushi > blah
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
>                                  Dload  Upload   Total   Spent    Left
> Speed
> 100  180k  100  180k    0     0   104k      0  0:00:01  0:00:01 --:--:--
> 133k
>
> Granted, this is a pretty small sample size and not an exhaustive test, but
> I'd bet money right now that something is up with feedsky.com's GZIP
> response.
>
>
> On Wed, Nov 18, 2009 at 11:13 PM, Alan Xing <alanx...@gmail.com> wrote:
>
>> Hi there,
>>
>> We have run into this feed fetch problem, with GAE Python code throwing
>> DownloadError. This problem seems to happen to a lot of feeds with Chinese
>> characters inside. Almost any feed from feedsky.com causes such problem.
>>
>> http://feed.feedsky.com/qiushi
>> http://feed.feedsky.com/ihero
>> http://feed.feedsky.com/ken
>> http://feed.feedsky.com/cutescr
>> http://feed.glif.cn/
>>
>> All these feeds can be subscribed correctly by Google Reader.
>>
>> Is this a known problem? Any suggestion to fix or work around is
>> appreciated!
>>
>> Thanks,
>> Alan
>>
>>  File "D:\Python25\lib\urllib2.py", line 381, in open
>>
>>     response = self._open(req, data)
>>
>>   File "D:\Python25\lib\urllib2.py", line 399, in _open
>>
>>     '_open', req)
>>
>>   File "D:\Python25\lib\urllib2.py", line 360, in _call_chain
>>
>>     result = func(*args)
>>
>>   File "D:\Python25\lib\urllib2.py", line 1107, in http_open
>>
>>     return self.do_open(httplib.HTTPConnection, req)
>>
>>   File "D:\Python25\lib\urllib2.py", line 1080, in do_open
>>
>>     r = h.getresponse()
>>
>>   File "D:\Program
>> Files\Google\google_appengine\google\appengine\dist\httplib.py", line
>>
>> 203, in getresponse
>>
>>     self._allow_truncated, self._follow_redirects)
>>
>>   File "D:\Program
>> Files\Google\google_appengine\google\appengine\api\urlfetch.py", line
>>
>> 241, in fetch
>>
>>     return rpc.get_result()
>>
>>   File "D:\Program
>>
>> Files\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py",
>> line 478, in
>>
>> get_result
>>
>>     return self.__get_result_hook(self)
>>
>>   File "D:\Program
>> Files\Google\google_appengine\google\appengine\api\urlfetch.py", line
>>
>> 325, in _get_fetch_result
>>
>>     raise DownloadError(str(err))
>>
>> DownloadError: ApplicationError: 2
>> ['\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03\xec}
>>
>>
>> \xe9S\x1bY\xb2\xef\xe7\xf6_Q\xd7\x13w\xdc\x13m\xd0\x02bk\xa0oO\x8f\xbb_\xbf\xe9\xc5\xd1
>>
>>
>> \xf6\x8c\xa3\xe3\xc6\r\x87\x90JBc!i\xb4\x18s\xe3\xc5\r\t\x10\x88U\xc2fG\x98
>>
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>>
>
>
>
> --
> Ikai Lan
> Developer Programs Engineer, Google App Engine
>
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