Re: [squid-users] Caching Pandora

I am currently using the following for the items in question.

refresh_pattern pandora.com 0 300% 31536000
refresh_pattern . 0 80% 3156000

With violations off these work well. However they fail to cache all the
items I would like. When I had violations on I had tried refresh_pattern
. 0 0% 0 as well as setting all refresh_pattern to 0 0% 0 which still
failed to refresh the pages properly. I had also tried rebuilding the
cache from scratch several times.

Other relevant pattern's I am using:

#Dynamic Content
refresh_pattern -i cgi-bin 0 0% 0 refresh-ims
refresh_pattern -i \? 0 0% 3156000 refresh-ims
refresh_pattern -i .(asp|aspx|php|pl|xml|rss|kml|cgi|py|pyc) 0 0% 0
refresh-ims

#HTML
refresh_pattern text/html 0 80% 2592000 refresh-ims
refresh_pattern text/css 0 80% 2592000 refresh-ims

#Java & Javascript
refresh_pattern -i .(js|jar|java) 0 100% 31536000

#By MIME-Type
refresh_pattern application/* 0 300% 31536000
refresh_pattern audio/* 0 300% 31536000
refresh_pattern images/* 0 300% 31536000
refresh_pattern text/* 0 300% 31536000
refresh_pattern video/* 0 300% 31536000

When I had violations on the Pandora entry was similar to this...

refresh_pattern pandora.com 0 300% 31536000 override-expire
reload-into-ims ignore-reload ignore-no-cache ignore-private
ignore-no-store ignore-auth

Amos Jeffries wrote:
> Jason Spegal wrote:
>> I would wager it's content control given what they are. However with
>> violations on they can be cached. Without they cannot. I just haven't
>> been able to figure out how to get squid to behave with violations
>> turned on. My only other option I can see is to setup a second squid
>> with violations and filter all the traffic to/from Pandora through it.
>
> Use refresh_pattern with a regex that only matches pandora URL.
>
> I'll wager you have either added all the overrides to the . pattern,
> or have a overly-greedy regex in use.
>
> Amos
>
>>
>> Adrian Chadd wrote:
>>> This doesn't surprise me. They may be trying to maximise outbound
>>> bits, or try to retain control over content, or not understanding
>>> caching, or all/combination of the above.
>>>
>>> I'd suggest contacting them and asking.
>>>
>>>
>>>
>>>
>>> adrian
>>>
>>> 2009/7/26 Jason Spegal <jspegal_at_comcast.net>:
>>>
>>>> A little bit messy but here are some snippets.
>>>>
>>>> ###Access.log
>>>>
>>>> 1248572380.275 178 10.10.122.248 TCP_REFRESH_UNMODIFIED/304 232 GET
>>>> http://images-sjl-1.pandora.com/images/public/amz/1/2/0/4/727361124021_500W_495H.jpg
>>>>
>>>> - DIRECT/208.85.40.13 -
>>>> 1248572409.144 8472 10.10.122.241 TCP_MISS/200 1581181 GET
>>>> http://audio-sjl-t3-2.pandora.com/access/7008639604707703825.mp4? -
>>>> DIRECT/208.85.41.38 application/octet-stream
>>>> 1248572439.512 94 10.10.122.241 TCP_MEM_HIT/200 55396 GET
>>>> http://images-sjl-2.pandora.com/images/public/amz/3/0/2/3/602498413203_500W_499H.jpg
>>>>
>>>> - NONE/- image/jpeg
>>>> 1248572570.898 300 10.10.122.248 TCP_MISS/200 6521 GET
>>>> http://images-sjl-3.pandora.com/images/public/amz/2/2/4/4/039841434422_130W_130H.jpg
>>>>
>>>> - DIRECT/208.85.41.23 image/jpeg
>>>> 1248572600.538 29937 10.10.122.248 TCP_MISS/200 7704188 GET
>>>> http://audio-sjl-t3-2.pandora.com/access/3642267922875646389.mp3? -
>>>> DIRECT/208.85.41.38 application/octet-stream
>>>> 1248572615.735 11507 10.10.122.241 TCP_MISS/200 2109481 GET
>>>> http://audio-sjl-t2-2.pandora.com/access/5722981497105294607.mp4? -
>>>> DIRECT/208.85.41.36 application/octet-stream
>>>> 1248572635.903 179 10.10.122.248 TCP_REFRESH_UNMODIFIED/304 232 GET
>>>> http://images-sjl-3.pandora.com/images/public/amz/2/2/4/4/039841434422_130W_130H.jpg
>>>>
>>>> - DIRECT/208.85.41.23 -
>>>> 1248572641.444 40 10.10.122.241 TCP_HIT/200 21616 GET
>>>> http://images-sjl-2.pandora.com/images/public/amz/8/7/6/1/602498611678_300W_273H.jpg
>>>>
>>>> - NONE/- image/jpeg
>>>>
>>>> ###Store.log
>>>>
>>>> 1248572380.275 RELEASE -1 FFFFFFFF
>>>> 097EAE1108DCEF192ED1C3BFF1F6C1B5 304
>>>> 1248572380 -1 -1 unknown -1/0 GET
>>>> http://images-sjl-1.pandora.com/images/public/amz/1/2/0/4/727361124021_500W_495H.jpg
>>>>
>>>> 1248572409.144 RELEASE -1 FFFFFFFF
>>>> 6B93B1BF958703B3FC3CD1ADDD515695 200
>>>> 1248572400 -1 1248572400 application/octet-stream
>>>> 1580815/1580815 GET
>>>> http://audio-sjl-t3-2.pandora.com/access/7008639604707703825.mp4?
>>>> 1248572570.897 SWAPOUT 00 0004CF23
>>>> BEEE111A39B596B14903743011AF2C36 200
>>>> 1248572570 1248490006 -1 image/jpeg 6181/6181 GET
>>>> http://images-sjl-3.pandora.com/images/public/amz/2/2/4/4/039841434422_130W_130H.jpg
>>>>
>>>> 1248572600.538 RELEASE -1 FFFFFFFF
>>>> 070416ED935AD18DCA793569D2C6A652 200
>>>> 1248572570 -1 1248572570 application/octet-stream
>>>> 7703822/7703822 GET
>>>> http://audio-sjl-t3-2.pandora.com/access/3642267922875646389.mp3?
>>>> 1248572615.735 RELEASE -1 FFFFFFFF
>>>> B0EB42B39131DF028BA3BE9A39CC24E4 200
>>>> 1248572604 -1 1248572604 application/octet-stream
>>>> 2109115/2109115 GET
>>>> http://audio-sjl-t2-2.pandora.com/access/5722981497105294607.mp4?
>>>> 1248572635.903 RELEASE -1 FFFFFFFF
>>>> CDCA0D3510080D121E5578310976676E 304
>>>> 1248572635 -1 -1 unknown -1/0 GET
>>>> http://images-sjl-3.pandora.com/images/public/amz/2/2/4/4/039841434422_130W_130H.jpg
>>>>
>>>> 1248572886.822 RELEASE -1 FFFFFFFF
>>>> A95C86074129546301911C2FC251071D 200
>>>> 1248572872 -1 1248572872 application/octet-stream
>>>> 2086824/2086824 GET
>>>> http://audio-sjl-t1-1.pandora.com/access/5188159311574708305.mp4?
>>>>
>>>> ###Wireshark
>>>>
>>>> Hypertext Transfer Protocol
>>>> HTTP/1.0 200 OK\r\n
>>>> Date: Sun, 26 Jul 2009 05:12:58 GMT\r\n
>>>> Server: Apache\r\n
>>>> Content-Length: 6137729\r\n
>>>> Cache-Control: no-cache, no-store, must-revalidate, max-age=-1\r\n
>>>> Pragma: no-cache, no-store\r\n
>>>> Expires: -1\r\n
>>>> Content-Type: application/octet-stream\r\n
>>>> X-Cache: MISS from ichiban\r\n
>>>> X-Cache-Lookup: MISS from ichiban:3128\r\n
>>>> Via: 1.0 ichiban (squid)\r\n
>>>> Proxy-Connection: keep-alive\r\n
>>>> \r\n
>>>>
>>>> mos Jeffries wrote:
>>>>
>>>>> Jason Spegal wrote:
>>>>>
>>>>>> I was able to cache Pandora by compiling with
>>>>>> --enable-http-violations
>>>>>> and using a refresh_pattern to cache everything regardless. This
>>>>>> however
>>>>>> broke everything by preventing proper refreshing of any site. If
>>>>>> it could be
>>>>>> worked where violations only happened as directly specified in the
>>>>>> configuration it would be a workable solution. I did some testing
>>>>>> and I
>>>>>> could not confirm that it was anything in the configuration file
>>>>>> itself that
>>>>>> was causing the issue. I wouldn't recommend using this as such.
>>>>>>
>>>>>>
>>>>> Which indicates that there are fine tuning possible to cache just
>>>>> Pandora.
>>>>> Find yoursef one of the Pandora URLs in your access.log and take a
>>>>> visit to
>>>>> www.redbot.org or the ircache.org cacheability engine.
>>>>>
>>>>>
>>>>> Amos
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Henrik Nordstrom wrote:
>>>>>>
>>>>>>> lör 2009-07-25 klockan 12:05 -0600 skrev Brett Glass:
>>>>>>>
>>>>>>>
>>>>>>>> One of the largest consumers of our HTTP bandwidth is Pandora,
>>>>>>>> the free
>>>>>>>> music service. Unfortunately, Pandora marks its streams as
>>>>>>>> non-cacheable and
>>>>>>>> also puts question marks in the URLs, which is a huge waste of
>>>>>>>> bandwidth.
>>>>>>>> How can this be overridden?
>>>>>>>>
>>>>>>>>
>>>>>>> The questionmark can be ignored. See the "cache" directive. But
>>>>>>> if there
>>>>>>> is other parameters behind there (normally not logged) that just
>>>>>>> may not
>>>>>>> help..
>>>>>>>
>>>>>>> Regarding non-cacheable.. most crap can be overridden by
>>>>>>> refresh_pattern.
>>>>>>>
>>>>>>> But, if it's a streaming service (I know nothing about Pandora)
>>>>>>> then you
>>>>>>> are quite likely out of luck.
>>>>>>>
>>>>>>> Regards
>>>>>>> Henrik
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>
>>>>
>>
>
>
Received on Sun Jul 26 2009 - 06:31:59 MDT