diff --git a/homeworks/week4/hw2.js b/homeworks/week4/hw2.js
index e69de29..8716bc3 100644
--- a/homeworks/week4/hw2.js
+++ b/homeworks/week4/hw2.js
@@ -0,0 +1,83 @@
+const request = require('request');
+
+const action = process.argv[2]
+const parameter = process.argv[3]
+
+switch (action) {
+  case 'list':
+    listbooks();
+    break;
+  case 'read':
+    readbooks(parameter);
+    break;
+  case 'delete':
+    deletebooks(parameter);
+    break;
+  case 'create':
+    createbooks(parameter);
+    break;
+  case 'update':
+    updatebooks(parameter);
+    break;
+  default:
+    console.log('可用參數:list, read, delete, create, update');
+}
+i
+function listbooks() {
+  request.get(
+  'https://lidemy-book-store.herokuapp.com/books?_limit=20',
+  function (error,response,body) {
+    let data;
+    try {
+      data = JSON.parse(body);
+  } catch (err) {
+    console.log('抓取錯誤',err);
+    return;
+  }
+  for (let i = 0; i < data.length; i++) {
+    console.log(data[i].id + ' ' + data[i].name)
+ }
+ },
+);
+}
+
+function readbooks(id) {
+  request.get('https://lidemy-book-store.herokuapp.com/books/:id',
+  function (error,response,body) {
+    let data;
+    try {
+      data = JSON.parse(body);
+    } catch (err) {
+      console.log('抓取錯誤',err);
+    return
+   } console.log(data.id + '' + data.name)
+  });
+}
+
+function deletebooks(id) {
+ request.delete('https://lidemy-book-store.herokuapp.com/books/:id',
+  function (error) {
+    if (err) return console.log('刪除失敗');
+    return console.og('刪除成功')
+  });
+}
+
+function createbooks(name) {
+  request.post(
+  {url:'https://lidemy-book-store.herokuapp.com/books',
+   form:{name}},
+  function (error) {
+    if (err) return console.log('新增失敗',err);
+    return console.og('新增成功')
+  });
+}
+
+function updatebooks(id, name) {
+  request.patch(
+  {url:'https://lidemy-book-store.herokuapp.com/books/:id',
+   form:{newname,}},
+  function (error) {
+    if (err) return console.log('更新失敗',err);
+    return console.og('更新成功')
+  });
+}