Update:Remove read-chunk dependency

server/libs/readChunk/withOpenFile.js

@@ -0,0 +1,41 @@
+'use strict'
+
+const fs = require('fs')
+const pify = require('./pify')
+const pTry = (fn, ...arguments_) => new Promise(resolve => {
+  resolve(fn(...arguments_));
+})
+const pFinally = (promise, onFinally) => {
+  onFinally = onFinally || (() => { });
+
+  return promise.then(
+    val => new Promise(resolve => {
+      resolve(onFinally());
+    }).then(() => val),
+    err => new Promise(resolve => {
+      resolve(onFinally());
+    }).then(() => {
+      throw err;
+    })
+  );
+};
+
+
+const fsP = pify(fs)
+
+module.exports = (...args) => {
+  const callback = args.pop()
+  return fsP
+    .open(...args)
+    .then(fd => pFinally(pTry(callback, fd), _ => fsP.close(fd)))
+}
+
+module.exports.sync = (...args) => {
+  const callback = args.pop()
+  const fd = fs.openSync(...args)
+  try {
+    return callback(fd)
+  } finally {
+    fs.closeSync(fd)
+  }
+}