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npm install requst --save

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request(input, init)

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const request = require('request');
request('http://www.google.com', function (error, response, body) {
  console.error('error:', error);
  console.log('statusCode:', response && response.statusCode);
  console.log('head:', response.headers);
  console.log('body:', body);
});

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const json = {
  name: 'jason',
  age: '23',
  phone: '0922',
};

// 排除 age
const obj = JSON.parse(json, (key, value) => {
  if (key === 'age') return undefined;
  return value;
});

//{name: "jason", phone: "0922"}

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const obj = {
  name: 'jason',
  age: '23',
  phone: '0922',
};

// 排除 age
const json = JSON.stringify(obj, (key, value) => {
  if (key === 'age') return undefined;
  return value;
});

//{"name": "jason", "phone": "0922"} <= 這是字串

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try {
  // 預期可能會發生錯誤的程式碼
} catch (e) {
  // try 區塊有拋出錯誤時，則執行這裡的程式碼
} finally {
  // finally 區塊的程式碼一定會在最後被執行
  // 可以省略 finally 區塊
}

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const request = require('request');
const API_ENDPOINT = 'https://lidemy-book-store.herokuapp.com';

request(`${API_ENDPOINT}/books?_limit=10`, (err, res, body) => {
  if (err) {
    return console.log('抓取失敗', err);
  }
  let data;
  try {
    data = JSON.parse(body);
  } catch (err) {
    console.log(err);
    return;
  }
  for (let i = 0; i < data.length; i += 1) {
    console.log(`${data[i].id} ${data[i].name}`);
  }
});

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node hw2.js list // 印出前二十本書的 id 與書名
node hw2.js read 1 // 輸出 id 為 1 的書籍
node hw2.js delete 1 // 刪除 id 為 1 的書籍
node hw2.js create "I love coding" // 新增一本名為 I love coding 的書
node hw2.js update 1 "new name" // 更新 id 為 1 的書名為 new name

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const request = require('request');

const apiUrl = 'https://lidemy-book-store.herokuapp.com';
const action = process.argv[2];
const param = process.argv[3];

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switch (action) {
  case 'list':
    listBooks();
    break;
  case 'read':
    readBooks(param);
    break;
  case 'delete':
    deleteBooks(param);
    break;
  case 'create':
    createBooks(param);
    break;
  case 'update':
    updateBooks(param, process.argv[4]);
    break;
  default:
    console.log('Available commands: list, read, delete, create and update');
}

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function listBooks() {
  request(`${apiUrl}/books?_limit=20`, (err, res, body) => {
    if (err) return console.log('抓取失敗', err);
    let data;
    try {
      data = JSON.parse(body);
    } catch (e) {
      return console.log(e);
    }
    for (let i = 0; i < data.length; i += 1) {
      console.log(data[i].id, data[i].name);
    }
  });
}

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function readBooks(id) {
  request(`${apiUrl}/books/${id}`, (err, res, body) => {
    if (err) return console.log('抓取失敗', err);
    const data = JSON.parse(body);
    return console.log(data);
  });
}

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request.delete(
  'https://reqres.in/api/users/2',
  function (error, response, body) {
    console.log(response.statusCode);
  }
);

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function deleteBooks(id) {
  request.delete(`${apiUrl}/books/${id}`, (err) => {
    if (err) return console.log('刪除失敗');
    return console.log('刪除成功');
  });
}

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request.post(
  { url, form: { key: 'value' } },
  function (err, httpResponse, body) {
    /* ... */
  }
);

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function createBooks(name) {
  request.post({ url: `${apiUrl}/books`, form: { name } }, (err) => {
    if (err) return console.log('新增失敗', err);
    return console.log('新增成功');
  });
}

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request.patch({
    url,
    form: {
      //欲修改內容
    },
  }, function)

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function updateBooks(id, newName) {
  request.patch({ url: `${apiUrl}/books/${id}`, form: { newName } }, (err) => {
    if (err) return console.log('更新失敗', err);
    return console.log('更新成功');
  });
}

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const request = require('request');
const args = process.argv;
const API_ENDPOINT = 'https://restcountries.eu/rest/v2';

const name = args[2];

if (!name) {
  return console.log('請輸入國家名稱');
}

request(`${API_ENDPOINT}/name/${name}`, (err, res, body) => {
  if (err) {
    return console.log('抓取失敗', err);
  }
  const data = JSON.parse(body);
  if (data.status === 404) {
    return console.log('找不到國家資訊');
  }

  for (let i = 0; i < data.length; i++) {
    console.log('============');
    console.log('國家：' + data[i].name);
    console.log('首都：' + data[i].capital);
    console.log('貨幣：' + data[i].currencies[0].code);
    console.log('國碼：' + data[i].callingCodes[0]);
  }
});

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request({
  method: 'GET',
  url: <url>,
  headers: {
    '參數': 值,
  }
}, function(error,response,body){
  // 其他內容
})

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request(
  {
    method: 'GET',
    url: apiUrl,
    headers: {
      'Client-ID': clientID,
      Accept: 'application/vnd.twitchtv.v5+json',
    },
  },
  (err, res, body) => {
    console.log(body);
  }
);

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for (variable of iterable) {
  //statements
}

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const request = require('request');

const apiUrl = 'https://api.twitch.tv/kraken/games/top';
const clientID = 不給你複製我的ID;

request(
  {
    method: 'GET',
    url: apiUrl,
    headers: {
      'Client-ID': clientID,
      Accept: 'application/vnd.twitchtv.v5+json',
    },
  },
  (err, res, body) => {
    if (err) return console.log('抓取失敗');
    const data = JSON.parse(body).top;
    for (const i of data) {
      console.log(i.viewers, i.game.name);
    }
    return true;
  }
);

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const request = require('request');

request('https://v61265.com/reataurants', (err, res, body) => {
  // 這裡是你要的內容
});

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const request = require('request');

request(`https://v61265.com/restaurants/${id}`, (err, res, body) => {
  //這裡是你要的內容
});

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const request = require('request');

request.post(
  {
    url: 'https://v61265.com/restaurants',
    form: {
      name, //新餐廳名稱
    },
  },
  (err, res, body) => {
    //這裡是你想要的內容
  }
);

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const request = require('request');

request.delete(`https://v61265.com/restaurants/${id}`, (err, res, body) => {
  //這裡可以加其他東西
});

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const request = require('request');

request.patch(
  {
    url: `https://v61265.com/restaurants/${id}`,
    form: { name },
  },
  (err, res, body) => {
    //可以加其他東西
  }
);