Turns out that this issue is in the issue tracker:

   http://code.google.com/p/googleappengine/issues/detail?id=739

The answer is to make your request in the following manner:

   result = urlfetch.fetch(url, headers = {'Cache-Control' : 'max-
age=300'})

Where "max-age" is the oldest you want data returned from the cache to
be.


On Mar 2, 6:41 pm, admin go2 <go2apps...@gmail.com> wrote:
> You can add a random number after the url. For instance,
>
> url=http://yourapp.appspot.com/yourpath
> url=url+'?'+ random.random()
>
> Good luck.
>
> go2.appspot.com
>
>
>
> My app needs to get a fresh copy of a dynamic webpage page every few
>
> minutes.  I am fetching date from a URL with this function:
>
> def getUrlData(url):
>
>     result = urlfetch.fetch(url, headers = {'Cache-Control' : 'no-
>
> cache', 'Pragma' : 'no-cache'})
>
>     if(result.status_code != 200):
>
>          logging.error( "Error getting URL data: %d" %
>
> result.status_code)
>
>          return None
>
>     logging.warn("Fetch %s response headers: %s" % (url, repr
>
> (result.headers)))
>
>     return result.content
>
> However, it seems like I am still getting cached data.  The logging
>
> statement output the following:
>
> Fetch [URL] response headers: {'Content-Length': '21883', 'X-Google-
>
> Cache-Control': 'remote-cache-hit', 'Age': '    633', 'Expires': 'Mon,
>
> 02 Mar 2009 23:49:23 GMT', 'Vary': 'Accept-Encoding', 'Server':
>
> 'Apache', 'last-modified': 'Mon, 02 Mar 2009 23:34:23 GMT',
>
> 'Connection': 'close', 'Via': 'HTTP/1.1 GWA (remote cache hit)',
>
> 'Cache-control': 'public; max-age=600', 'Date': 'Mon, 02 Mar 2009
>
> 23:34:23 GMT', 'Content-Type': 'text/html; charset=ISO-8859-1'}
>
> Does anyone know how to ensure a fresh page?
>
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