envoyproxy/envoy

support for http/1.1 -> http2 client upgrade for outbound connections

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#1,502 opened on Aug 21, 2017

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 (3 comments) (12 reactions) (0 assignees)C++ (5,373 forks)batch import
enhancementhelp wanted

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Description

Envoy only supports http2 connections to the upstream hosts with prior knowledge. Any upgrade request from http1.1 to http2 from the client is not supported.

Can this be supported?

Thanks!

Contributor guide

Research direction
Investigate how Envoy establishes upstream connections and implement support for HTTP/1.1 to HTTP/2 upgrade using the Upgrade header and 101 Switching Protocols response.
Tech stack
cpp
Domain
backendnetworking
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++HTTP/2Envoy architecture
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30