Re: [squid-users] Caching Pandora

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
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>
>

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