Support for HTTP is a key priority in terms of ensuring the continued success of

Node.js as captured in the project's

[technical priorities](https://github.com/nodejs/node/blob/HEAD/doc/contributing/technical-priorities.md).

The current high level strategy is based on the discussion in the

[Next-10](https://github.com/nodejs/next-10)

[mini-summit](https://github.com/nodejs/next-10/blob/main/meetings/summit-jan-2022.md)

on modern HTTP which was held on Jan 27 2022.

The key elements of our strategy for future HTTP APIs are:

* APIs should be HTTP protocol independent (support HTTP1, HTTP2, etc.).

* APIs should be transport protocol independent (TCP, QUIC, etc.).

* APIs should provide good defaults that perform well.

* Client/server APIs should be consistent and allow easy integration.

* Common requirements like piping out from client API to server APIs should be

easy.

* For both the Client and Server there is a need for multiple APIs, with each

targeting a different level of abstraction.

Unfortunately our existing HTTP APIs (

[HTTP](https://nodejs.org/docs/latest/api/http.html),

[HTTPS](https://nodejs.org/docs/latest/api/https.html), and

[HTTP2](https://nodejs.org/docs/latest/api/http2.html))

do not align with our high level strategy. While these APIs

are widely used and we do not plan to deprecate or remove them,

they are not the focus of active development or performance improvements.

Bug fixes however are still important for all of these APIs.

With respect to the HTTP protocols themselves, our current assessment in

terms of priority within existing or new APIs is:

* HTTP 2 is in “maintenance mode” for both protocol and APIs.

* HTTP 1 is a stable protocol, but innovation is still possible with the APIs.

* HTTP 3 is an important protocol and we need to add support for it.

The current strategy is to build out 2 new client APIs and 2 new Server APIs

in line with the high level strategy above.

While transport-level APIs are important (e.g. socket level), the HTTP APIs

should not be tied to a specific transport-level API. Therefore,

transport-level APIs are out of the scope of our HTTP strategy/maintenance

information.

For client APIs we want a high-level API and a low-level API when

more control is required. The current plan is for the following APIs:

* High-level API -

[Fetch](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API)

based API built on top of [undici](https://www.npmjs.com/package/undici).

* Low-level API - a subset of the APIs exposed by

[undici](https://www.npmjs.com/package/undici). The exact shape and

set of these APIs is still to be worked out. The current plan is to

pull undici into Node.js core without exposing its APIs in the Node.js

API so that it can initially be used to support the higher level

Fetch-based API. As this gets worked out we will discuss which

APIs to expose in the Node.js API surface.

For the server APIs we do not yet have a clear path, other than wanting

to align them with the APIs built for the client.

The low-level implementation of the

[HTTP](https://nodejs.org/docs/latest/api/http.html)

and [HTTPS](https://nodejs.org/docs/latest/api/https.html) APIs

are maintained in the [llttp](https://github.com/nodejs/llhttp)

repository. Updates are pulled into Node.js under

[deps/llhttp](https://github.com/nodejs/node/tree/HEAD/deps/llhttp)

The low-level implementation is made available in the Node.js API through

JavaScript code in the [lib](https://github.com/nodejs/node/tree/HEAD/lib)

directory and C++ code in the

[src](https://github.com/nodejs/node/tree/HEAD/src) directory.

The low-level implementation of

[HTTP2](https://nodejs.org/docs/latest/api/http2.html)

is based on [nghttp2](https://nghttp2.org/). Updates are pulled into Node.js

under [deps/nghttp2](https://github.com/nodejs/node/tree/HEAD/deps/nghttp2)

as needed.

The low-level implementation is made available in the Node.js API through

JavaScript code in the [lib](https://github.com/nodejs/node/tree/HEAD/lib)

directory and C++ code in the

[src](https://github.com/nodejs/node/tree/HEAD/src) directory.