[ANN] rescript-rest - RPC-like client, contract, and server implementation for a pure REST API

Also, there’s a cool feature to define response headers, which doesn’t exist in ts-rest

Responses from an API can include custom headers to provide additional information on the result of an API call. For example, a rate-limited API may provide the rate limit status via response headers as follows:

HTTP 1/1 200 OK
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 99
X-RateLimit-Reset: 2016-10-12T11:00:00Z
{ ... }

You can define custom headers in a response as follows:

let ping = Rest.route(() => {
  path: "/ping",
  method: "GET",
  summary: "Checks if the server is alive",
  variables: _ => (),
  responses: [
    s => {
      s.status(#200)
      s.description("OK")
      {
        "limit": s.header("X-RateLimit-Limit", S.int->S.description("Request limit per hour.")),
        "remaining": s.header("X-RateLimit-Remaining", S.int->S.description("The number of requests left for the time window.")),
        "reset": s.header("X-RateLimit-Reset", S.string->S.datetime->S.description("The UTC date/time at which the current rate limit window resets.")),
      }
    }
  ],
})