node简易服务器完成

utils/fsUtils.js

@@ -0,0 +1,37 @@
+const fs = require("fs")
+const path = require("path")
+
+const promisify = fn => {
+  return function () {
+    let args = arguments;
+    return new Promise(function (resolve, reject) {
+      [].push.call(args, function (err, result) {
+        if (err) {
+          console.log(err)
+          reject(err);
+        } else {
+          resolve(result);
+        }
+      });
+      fn.apply(null, args);
+    });
+  }
+}
+
+const readdir = promisify(fs.readdir)
+const stat = promisify(fs.stat)
+const findFile = (dir = '.', cb) => {
+  return readdir(dir).then(apps => {
+    return Promise.all(apps.map(e => {
+      let cPath = path.join(dir, e)
+      return stat(cPath).then(state => {
+        if (state.isDirectory()) {
+          return findFile(cPath, cb)
+        } else if (state.isFile()) {
+          cb && cb(cPath)
+        }
+      })
+    }))
+  })
+}
+module.exports = {readdir, stat, findFile}