Feature: keep proxy awake

.gitignore

@@ -1,3 +1,4 @@
 exec.sh
 proxy.sh
+proxy.lock
 node_modules

proxy/index.js

@@ -80,5 +80,18 @@ const proxy = new AnyProxy.ProxyServer({
   rule
 })
 
+proxy.on('ready', () => {
+  const fs = require('fs')
+  const filename = 'proxy.lock'
+  setInterval(() => {
+    const time = new Date();
+    try {
+        fs.utimesSync(filename, time, time);
+    } catch (e) {
+        let fd = fs.openSync(filename, 'a');
+        fs.closeSync(fd);
+    }
+  }, 1000)
+})
 proxy.on('error', console.error);
 proxy.start();