added API route to start/stop a socks5 proxy server

lib/socks5-server.js

@@ -0,0 +1,73 @@
+'use strict';
+
+module.exports.create = function () {
+  var PromiseA = require('bluebird');
+  var enableDestroy = require('server-destroy');
+  var server;
+
+  function curState() {
+    if (!server) {
+      return PromiseA.resolve({running: false});
+    }
+    return PromiseA.resolve({
+      running: true
+    , port: server.address().port
+    });
+  }
+
+  function start() {
+    if (server) {
+      return curState();
+    }
+
+    server = require('socksv5').createServer(function (info, accept) {
+      accept();
+    });
+
+    enableDestroy(server);
+    server.on('close', function () {
+      server = null;
+    });
+
+    server.useAuth(require('socksv5').auth.None());
+
+    return new PromiseA(function (resolve, reject) {
+      server.on('error', function (err) {
+        if (err.code === 'EADDRINUSE') {
+          server.listen(0);
+        } else {
+          server = null;
+          reject(err);
+        }
+      });
+      server.listen(1080, function () {
+        resolve(curState());
+      });
+    });
+  }
+
+  function stop() {
+    if (!server) {
+      return curState();
+    }
+    return new PromiseA(function (resolve, reject) {
+      var timeoutId = setTimeout(function () {
+        server.destroy();
+      }, 1000);
+      server.close(function (err) {
+        clearTimeout(timeoutId);
+        if (err) {
+          reject(err);
+        } else {
+          resolve();
+        }
+      });
+    });
+  }
+
+  return {
+    isRunning: curState
+  , start: start
+  , stop: stop
+  };
+};

lib/worker.js

@@ -38,6 +38,7 @@ function create(conf) {
       }
     }
   };
+  deps.socks5 = require('./socks5-server').create(deps, conf);
 
   require('./goldilocks.js').create(deps, conf);
   process.removeListener('message', create);

packages/apis/com.daplie.goldilocks/index.js

@@ -326,6 +326,32 @@ module.exports.create = function (deps, conf) {
         });
       });
     }
+  , socks5: function (req, res) {
+      if (handleCors(req, res, ['GET', 'POST', 'DELETE'])) {
+        return;
+      }
+      isAuthorized(req, res, function () {
+        var method = req.method.toUpperCase();
+        var prom;
+
+        if (method === 'POST') {
+          prom = deps.socks5.start();
+        } else if (method === 'DELETE') {
+          prom = deps.socks5.stop();
+        } else {
+          prom = deps.socks5.curState();
+        }
+
+        res.setHeader('Content-Type', 'application/json;');
+        prom.then(function (result) {
+          res.end(JSON.stringify(result));
+        }, function (err) {
+          err.message = err.message || err.toString();
+          res.statusCode = 500;
+          res.end(JSON.stringify({error: {message: err.message, code: err.code}}));
+        });
+      });
+    }
   , _api: api
   };
 };