mod_proxy_http2
HTTP/2 support module for mod_proxy
Extension
mod_proxy_http2.c
proxy_http2_module

This module requires the service of mod_proxy. It provides the features used for proxying HTTP/2 requests. mod_proxy_http2 supports HTTP/2 only. It does not provide any downgrades to HTTP/1.1.

Thus, in order to get the ability of handling HTTP/2 proxy requests, mod_proxy and mod_proxy_http2 have to be present in the server.

mod_proxy_http2 works with incoming requests over HTTP/1.1 and HTTP/2 requests. If mod_http2 handles the frontend connection, requests against the same HTTP/2 backend are sent over a single connection, whenever possible.

This module relies on libnghttp2 to provide the core http/2 engine.

# Warning

This module is experimental. Its behaviors, directives, and defaults are subject to more change from release to release relative to other standard modules. Users are encouraged to consult the "CHANGES" file for potential updates.

# Warning

Do not enable proxying until you have secured your server. Open proxy servers are dangerous both to your network and to the Internet at large.

mod_http2
mod_proxy
mod_proxy_connect

# Basic Examples

The examples below demonstrate how to configure HTTP/2 for backend connections for a reverse proxy.

## HTTP/2 (TLS)

ProxyPass "/app" "h2://app.example.com" ProxyPassReverse "/app" "h2://app.example.com"

## HTTP/2 (cleartext)

ProxyPass "/app" "h2c://app.example.com" ProxyPassReverse "/app" "h2c://app.example.com"

# Request notes

mod_proxy_http creates the following request notes for logging using the `%{VARNAME}n` format in LogFormat or ErrorLogFormat:

proxy-source-port
  The local port used for the connection to the backend server.
proxy-status
  The HTTP/2 status received from the backend server.