37 lines
1.2 KiB
Bash
37 lines
1.2 KiB
Bash
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#!/bin/sh
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# Bridge: cursor-agent spawns this as a stdio MCP server. We connect to a
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# per-session unix socket provided as $1 and tunnel newline-delimited
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# JSON-RPC frames between cursor-agent's stdin/stdout and the proxy-owned
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# socket server (which is the real MCP server).
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#
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# Uses Node (always available in the image) rather than nc, to avoid
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# depending on netcat variants that may not support -U for unix sockets.
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socket="$1"
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if [ -z "$socket" ]; then
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echo "usage: $0 <socket-path>" >&2
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exit 1
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fi
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exec node -e '
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const sock = process.argv[1];
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if (!sock) { console.error("mcp-stdio-bridge: missing socket arg"); process.exit(1); }
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const net = require("node:net");
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const conn = net.createConnection(sock);
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let buf = "";
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process.stdin.setEncoding("utf8");
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process.stdin.on("data", (chunk) => {
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// Forward as-is; JSON-RPC frames are newline-delimited on both sides.
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conn.write(chunk);
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});
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process.stdin.on("end", () => conn.end());
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conn.setEncoding("utf8");
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conn.on("data", (chunk) => process.stdout.write(chunk));
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conn.on("end", () => process.exit(0));
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conn.on("close", () => process.exit(0));
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conn.on("error", (e) => {
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console.error("[mcp-stdio-bridge] socket error: " + e.message);
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process.exit(1);
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});
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process.on("SIGPIPE", () => process.exit(0));
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' "$socket"
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