bunjs supports#649
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… fallback in server.ts Agent-Logs-Url: https://github.com/tocha688/proxy-chain/sessions/5e6f77bd-e7c9-4264-bdbb-7cee28af680f Co-authored-by: tocha688 <154045226+tocha688@users.noreply.github.com>
…comment Agent-Logs-Url: https://github.com/tocha688/proxy-chain/sessions/5e6f77bd-e7c9-4264-bdbb-7cee28af680f Co-authored-by: tocha688 <154045226+tocha688@users.noreply.github.com>
…ompatibility Agent-Logs-Url: https://github.com/tocha688/proxy-chain/sessions/8dea0a62-128b-44dd-aed9-3afe06cbc82a Co-authored-by: tocha688 <154045226+tocha688@users.noreply.github.com>
fix: ERR_TUNNEL_CONNECTION_FAILED — Bun.js + Node.js CONNECT tunnel compatibility
jancurn
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May 19, 2026
…as-request in server Inspired by #649. Two changes that let proxy-chain itself run under Bun when used as a library, independent of what the test harness can prove: 1. `src/chain.ts` no longer goes through `http.request().on('connect')` to reach the upstream proxy. Bun 1.3 implements http.request on top of fetch and (a) rejects RFC 7230 authority-form paths like `:443` with "fetch() URL is invalid", (b) swallows the 407/590-class upstream responses. We now open a raw `net` or `tls` socket, send the CONNECT line ourselves, parse the response header buffer, and hand the remaining bytes back via `socket.unshift`. `rawHeaders` is preserved on the synthetic IncomingMessage so `tunnelConnectResponded` subscribers (the anonymizeProxy listener test) keep working. 2. `Server.onRequest` falls back to `onConnect` when `request.method === 'CONNECT'`. Bun delivers CONNECT through the generic 'request' event for some client shapes; Node ignores this branch because it always uses the dedicated 'connect' event.
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bunjs supports