70a6110590
TypeScript/Deno runtime bridge — Go gRPC server + Deno sidecar. The seed project that inspired the entire Core framework. - Module: forge.lthn.ai/core/ts - Package: ts (renamed from coredeno) - gRPC bridge: CoreService (Go→Deno) + DenoService (Deno→Go) - Deno runtime: worker isolation, module loading, permissions - Proto descriptor retains original path (regenerate with protoc later) Co-Authored-By: Virgil <virgil@lethean.io>
94 lines
3.2 KiB
TypeScript
94 lines
3.2 KiB
TypeScript
// Deno http2 + grpc-js polyfill — must be imported BEFORE @grpc/grpc-js.
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//
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// Two issues with Deno 2.x node compat:
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// 1. http2.getDefaultSettings throws "Not implemented"
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// 2. grpc-js's createConnection returns a socket that reports readyState="open"
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// but never emits "connect", causing http2 sessions to hang forever.
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// Fix: wrap createConnection to emit "connect" on next tick for open sockets.
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import http2 from "node:http2";
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// Fix 1: getDefaultSettings stub
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(http2 as any).getDefaultSettings = () => ({
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headerTableSize: 4096,
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enablePush: true,
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initialWindowSize: 65535,
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maxFrameSize: 16384,
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maxConcurrentStreams: 0xffffffff,
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maxHeaderListSize: 65535,
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maxHeaderSize: 65535,
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enableConnectProtocol: false,
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});
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// Fix 2: grpc-js (transport.js line 536) passes an already-connected socket
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// to http2.connect via createConnection. Deno's http2 never completes the
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// HTTP/2 handshake because it expects a "connect" event from the socket,
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// which already fired. Emitting "connect" again causes "Busy: Unix socket
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// is currently in use" in Deno's internal http2.
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//
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// Workaround: track Unix socket paths via net.connect intercept, then in
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// createConnection, return a FRESH socket. Keep the original socket alive
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// (grpc-js has close listeners on it) but unused for data.
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import net from "node:net";
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const socketPathMap = new WeakMap<net.Socket, string>();
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const origNetConnect = net.connect;
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(net as any).connect = function (...args: any[]) {
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const sock = origNetConnect.apply(this, args as any);
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if (args[0] && typeof args[0] === "object" && args[0].path) {
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socketPathMap.set(sock, args[0].path);
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}
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return sock;
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};
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// Fix 3: Deno's http2 client never fires "remoteSettings" event, which
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// grpc-js waits for before marking the transport as READY.
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// Workaround: emit "remoteSettings" after "connect" with reasonable defaults.
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const origConnect = http2.connect;
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(http2 as any).connect = function (
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authority: any,
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options: any,
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...rest: any[]
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) {
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// For Unix sockets: replace pre-connected socket with fresh one
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if (options?.createConnection) {
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const origCC = options.createConnection;
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options = {
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...options,
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createConnection(...ccArgs: any[]) {
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const origSock = origCC.apply(this, ccArgs);
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const unixPath = socketPathMap.get(origSock);
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if (
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unixPath &&
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!origSock.connecting &&
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origSock.readyState === "open"
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) {
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const freshSock = net.connect({ path: unixPath });
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freshSock.on("close", () => origSock.destroy());
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return freshSock;
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}
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return origSock;
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},
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};
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}
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const session = origConnect.call(this, authority, options, ...rest);
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// Emit remoteSettings after connect — Deno's http2 doesn't emit it
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session.once("connect", () => {
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if (!session.destroyed && !session.closed) {
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const settings = {
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headerTableSize: 4096,
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enablePush: false,
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initialWindowSize: 65535,
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maxFrameSize: 16384,
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maxConcurrentStreams: 100,
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maxHeaderListSize: 8192,
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maxHeaderSize: 8192,
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};
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process.nextTick(() => session.emit("remoteSettings", settings));
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}
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});
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return session;
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};
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