Current Dev State

static/js/ketcher2/node_modules/get-ports/index.js

@@ -0,0 +1,50 @@
+var mapLimit = require('map-limit')
+var net = require('net')
+var DEFAULT_MAX_PORT = 65535
+
+module.exports = getPorts
+function getPorts (basePorts, maxPort, cb) {
+  if (!Array.isArray(basePorts)) {
+    throw new TypeError('must provide array of ports as first argument')
+  }
+  if (typeof maxPort !== 'number') {
+    cb = maxPort
+    maxPort = DEFAULT_MAX_PORT
+  }
+  if (typeof cb !== 'function') {
+    throw new TypeError('must provide callback function')
+  }
+  if (!isFinite(maxPort)) {
+    throw new TypeError('maxPort must be a finite number')
+  }
+
+  var usedPorts = []
+  mapLimit(basePorts, 1, function (base, next) {
+    getNextPort(base, function (err, port) {
+      if (err) return next(new Error('no ports found after ' + base))
+      next(null, port)
+    })
+  }, cb)
+
+  function getNextPort (basePort, cb) {
+    // skip used ports
+    while (basePort < maxPort && usedPorts.indexOf(basePort) >= 0) {
+      basePort++
+    }
+
+    if (basePort >= maxPort) {
+      return process.nextTick(function () {
+        cb(new Error('no open ports'))
+      })
+    }
+
+    var c = net.connect(basePort, function () {
+      c.destroy()
+      getNextPort(basePort + 1, cb)
+    })
+    c.on('error', function () {
+      usedPorts.push(basePort)
+      cb(null, basePort)
+    })
+  }
+}