[jira] [Commented] (TS-4092) Decouple HPACK from HTTP/2

["Masaori Koshiba (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-4092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119024#comment-15119024 ] 

Masaori Koshiba commented on TS-4092:
-------------------------------------

It is better that debug tags in HPACK start with {{hpack_}} not {{http2_hpack_}}.

> Decouple HPACK from HTTP/2
> --------------------------
>
>                 Key: TS-4092
>                 URL: https://issues.apache.org/jira/browse/TS-4092
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: HTTP/2
>            Reporter: Masakazu Kitajo
>            Assignee: Masakazu Kitajo
>             Fix For: 6.2.0
>
>
> Our HTTP/2 implementation and HPACK implementation are coupled tightly. This is bad. It makes things complicated.
> I tried to write a test runner which uses [hpack-test-case |https://github.com/http2jp/hpack-test-case], however, I had to call functions in HTTP2.cc. Because HPACK.cc has only primitive encoder and decoder, and doesn't handle header blocks. HTTP2.cc covers not only RFC7540 but also some part of RFC7541.
> On the other hand, HPACK.h exports pseudo header names as constants. They should be in HTTP2.h or MIME.h as WKS. We don't need them in HPACK implementation.
> Also, HPACK is used with QUIC (at least in current draft). We should decouple HPACK from HTTP/2 so that we can use the module with QUIC in the future.
> Once we have done this, we can write tests for these improvements more easily.
> TS-4002, TS-4061, TS-4014 and TS-3478



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