ponylang/ponyc 0.72.1 on GitHub

Add uri package to the standard library

The uri package from ponylang/uri is now part of the standard library. It provides RFC 3986 URI parsing, building, normalization, resolution, and equivalence checking, plus RFC 6570 URI template expansion and application/x-www-form-urlencoded parsing.

use "uri"

actor Main
  new create(env: Env) =>
    match ParseURI("https://example.com/path?key=value#frag")
    | let u: URI => env.out.print(u.string())
    | let e: URIParseError => env.err.print(e.string())
    end

The uri/template subpackage handles RFC 6570 URI template expansion:

use "uri/template"

actor Main
  new create(env: Env) =>
    try
      let tpl = URITemplate("{+user}/inbox")?
      let vars = URITemplateVariables.>set("user", "fred")
      env.out.print(tpl.expand(vars))
    end

Add http_client package to the standard library

The courier package from ponylang/courier, renamed to http_client, is now part of the standard library. It provides an HTTP/1.1 client with streaming callbacks, request building, response collection, redirect following, multipart form uploads, and typed JSON decoding.

use "http_client"
use "net"

actor MyClient is HTTPClientConnectionActor
  var _http: HTTPClientConnection = HTTPClientConnection.none()
  let _out: OutStream

  new create(auth: TCPConnectAuth, host: String, port: String,
    out: OutStream)
  =>
    _out = out
    _http = HTTPClientConnection(auth, host, port, this,
      ClientConnectionConfig)

  fun ref _http_client_connection(): HTTPClientConnection => _http

  fun ref on_connected() =>
    _http.send_request(HTTPRequest(GET, "/"))

  fun ref on_response(response: Response val) =>
    _out.print(response.status.string() + " " + response.reason)

  fun ref on_body_chunk(data: Array[U8] val) =>
    _out.write(data)

  fun ref on_response_complete() =>
    _out.print("")
    _http.close()

Fix TCP backpressure stalls on BSDs

TCP connections on FreeBSD, OpenBSD, and DragonFly BSD could stall for seconds each time the connection entered and exited backpressure. A high-throughput connection that cycled through backpressure repeatedly would see its throughput drop to single-digit KB/s.

[0.72.1] - 2026-09-13

Fixed

Fix TCP backpressure stalls on BSDs (PR #6037)

Added

Add uri package to the standard library (PR #6034)
Add http_client package to the standard library (PR #6034)