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From Eric Covener <>
Subject Re: [users@httpd] mod_deflate and chunked encoding
Date Sun, 05 Jun 2011 21:51:49 GMT
On Sun, Jun 5, 2011 at 5:40 PM, Xavier Noria <> wrote:
> On Sun, Jun 5, 2011 at 11:36 PM, Eric Covener <> wrote:
>>> If Passenger has to dechunk, and we want a chunked compressed
>>> response, and Apache is the one responsible for doing that, how should
>>> we signal Apache that we want compression and streaming for that
>>> particular response.
>> This is the main path of just configuring mod_deflate.  Nothing else
>> required.  Only passenger cares how passenger decided what the content
>> of the response was, to everyone else it's just buckets of data.
>> "Streaming" just means the module that generates the content of the
>> response routinely hands some data off to Apache to send off to the
>> client rather then e.g. waiting until it's 100% done.  It's also not
>> something you need to configure.
> But there has to be something else, because in streaming I want a
> chunked response that should start sending chunks to the client as
> soon as possible.
> If the back server sent just 200 bytes in the first chunk, I want
> those 200 bytes compressed and forwarded to the client exactly now. In
> particular there's no Content-Length computed.

Does passenger pass the first 200 bytes to Apache?

Does it follow them with a "flush bucket"?

Does the protocol passenger uses on the backend allow your app to tell
it when to flush?

Does the result change when you turn on mod_deflate (the preceding
questions are probably best asked on a passenger list, with this final
questions answer in-hand)

Eric Covener

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