[TS-2729] Add HTTP/2 support to ATS

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.3.0
• Component/s: HTTP/2
• Labels: review
• Assignee: Bryan Call
• Reporter: Ryo Okubo
• Created: 18/Apr/14 11:06
• Updated: 13/May/15 20:36
• Resolved: 24/Feb/15 03:28

Description

Overview

Support HTTP/2 as a client side L7 protocol. This feature is implemented into ATS core.
Now, it supports the latest HTTP/2 draft version, h2-16.
https://tools.ietf.org/html/draft-ietf-httpbis-http2-16

How to test

1. Build ATS codes normally. you need neither any build option nor external HTTP/2 library.
2. Configure settings to use https.
3. Add settings to records.config to use http2.

   CONFIG proxy.config.http2.enabled INT 1
   

4. Access to ATS by HTTP/2 client.

Descriptions of current attached patches.

• 0003-h2-prototype.patch
  • For experiment. Please don't merge it. It enables to interpret HTTP/2 requests and respond for it. But now this code is unsafe and dirty. More refactoring is required.

DONE

• Fundamental HTTP/2 frame handling
• Flow control
• Some error handlings

TODO

• Refactoring
• More debugging
• Write documents
• Add test tools for HPACK, HTTP/2 frames

No plan

• Server Push This would probably require support for Link preload?
• Stream Priority
• Alternative Services

Issue Links

• is related to: TS-3405 Memory use after free in HTTP/2