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weishuandGitHub
17439ae02c
Bun's fetch and node:http honor HTTP_PROXY/HTTPS_PROXY env vars, which can route loopback traffic through a configured proxy (e.g. Surge/Clash). When NO_PROXY doesn't explicitly exclude localhost, this breaks loopback communication: SessionStart hooks fail to arrive (transcripts don't sync, web UI stays empty), runner control client times out, and MCP server connections fail. Normalize NO_PROXY at the CLI entrypoint to always cover loopback (localhost, 127.0.0.1, ::1). Child processes inherit the patched env so their loopback traffic is covered too. Non-loopback traffic continues using the configured proxy. Supersedes the runner control client workaround from #563.
43 lines
1.5 KiB
TypeScript
43 lines
1.5 KiB
TypeScript
/**
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* Loopback proxy bypass.
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*
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* The CLI talks to itself and to local agents over loopback HTTP (hook
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* forwarder -> hook server, control client -> runner, claude -> local MCP
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* server). Bun's fetch AND its node:http implementation honor the
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* HTTP_PROXY/HTTPS_PROXY env vars, so when the user's shell exports a proxy
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* (e.g. Surge/Clash with `HTTP_PROXY=http://127.0.0.1:1080`) without
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* excluding localhost in NO_PROXY, every loopback request is routed through
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* the proxy — which may forward "127.0.0.1" to a remote node where nothing
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* is listening. Symptom: SessionStart hooks never arrive, transcripts never
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* sync, web UI stays empty.
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*
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* Fix: make sure NO_PROXY always covers loopback. Children (claude, runner,
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* hook-forwarder) inherit the patched env, so their loopback traffic is
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* covered too. Non-loopback traffic keeps using the configured proxy.
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*/
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const LOOPBACK_HOSTS = ['localhost', '127.0.0.1', '::1'];
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export function ensureLoopbackProxyBypass(env: NodeJS.ProcessEnv = process.env): void {
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const existing = env.NO_PROXY ?? env.no_proxy ?? '';
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const entries = existing
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.split(',')
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.map((entry) => entry.trim())
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.filter((entry) => entry.length > 0);
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const present = new Set(entries.map((entry) => entry.toLowerCase()));
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if (present.has('*')) {
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return;
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}
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for (const host of LOOPBACK_HOSTS) {
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if (!present.has(host)) {
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entries.push(host);
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}
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}
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const merged = entries.join(',');
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env.NO_PROXY = merged;
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env.no_proxy = merged;
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}
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