Initial commit

server/node_modules/ssh2/lib/http-agents.js

@@ -0,0 +1,84 @@
+'use strict';
+
+const { Agent: HttpAgent } = require('http');
+const { Agent: HttpsAgent } = require('https');
+const { connect: tlsConnect } = require('tls');
+
+let Client;
+
+for (const ctor of [HttpAgent, HttpsAgent]) {
+  class SSHAgent extends ctor {
+    constructor(connectCfg, agentOptions) {
+      super(agentOptions);
+
+      this._connectCfg = connectCfg;
+      this._defaultSrcIP = (agentOptions && agentOptions.srcIP) || 'localhost';
+    }
+
+    createConnection(options, cb) {
+      const srcIP = (options && options.localAddress) || this._defaultSrcIP;
+      const srcPort = (options && options.localPort) || 0;
+      const dstIP = options.host;
+      const dstPort = options.port;
+
+      if (Client === undefined)
+        Client = require('./client.js');
+
+      const client = new Client();
+      let triedForward = false;
+      client.on('ready', () => {
+        client.forwardOut(srcIP, srcPort, dstIP, dstPort, (err, stream) => {
+          triedForward = true;
+          if (err) {
+            client.end();
+            return cb(err);
+          }
+          stream.once('close', () => client.end());
+          cb(null, decorateStream(stream, ctor, options));
+        });
+      }).on('error', cb).on('close', () => {
+        if (!triedForward)
+          cb(new Error('Unexpected connection close'));
+      }).connect(this._connectCfg);
+    }
+  }
+
+  exports[ctor === HttpAgent ? 'SSHTTPAgent' : 'SSHTTPSAgent'] = SSHAgent;
+}
+
+function noop() {}
+
+function decorateStream(stream, ctor, options) {
+  if (ctor === HttpAgent) {
+    // HTTP
+    stream.setKeepAlive = noop;
+    stream.setNoDelay = noop;
+    stream.setTimeout = noop;
+    stream.ref = noop;
+    stream.unref = noop;
+    stream.destroySoon = stream.destroy;
+    return stream;
+  }
+
+  // HTTPS
+  options.socket = stream;
+  const wrapped = tlsConnect(options);
+
+  // This is a workaround for a regression in node v12.16.3+
+  // https://github.com/nodejs/node/issues/35904
+  const onClose = (() => {
+    let called = false;
+    return () => {
+      if (called)
+        return;
+      called = true;
+      if (stream.isPaused())
+        stream.resume();
+    };
+  })();
+  // 'end' listener is needed because 'close' is not emitted in some scenarios
+  // in node v12.x for some unknown reason
+  wrapped.on('end', onClose).on('close', onClose);
+
+  return wrapped;
+}