Google的試算表是一個很好存放資料的地方,許多人收集訂單資訊或是收集問卷資料,都會使用Google表單來做,而Google表單的資料也可以存進Google的試算表,如果手邊沒有資料庫可儲存資料,利用現成的Google試算表倒是一個不錯的方案。LineBot和使用者的對話,如果也能善用試算表,將會有許多的應用可以產生。但LineBot要能和Google試算表的API溝通,便要先經過許多的認證,取得Google的憑證及權杖,申請的過程有點繁雜,步驟如下:
1、登入google後進入啟用的網站,https://console.developers.google.com/start/api?id=sheets.googleapis.com
安裝完這二個模組後,package.json應該會長成這個樣子
{
"name": "bottest",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "node ."
},
"author": "",
"license": "ISC",
"dependencies": {
"express": "^4.15.3",
"google-auth-library": "^0.10.0",
"googleapis": "^19.0.0",
"linebot": "^1.3.0"
}
}
var fs = require('fs');
var readline = require('readline');
var google = require('googleapis');
var googleAuth = require('google-auth-library');
// If modifying these scopes, delete your previously saved credentials
// at ~./sheetsapi.json
var SCOPES = ['https://www.googleapis.com/auth/spreadsheets'];
var TOKEN_DIR = './';
var TOKEN_PATH = TOKEN_DIR + 'sheetsapi.json';
// Load client secrets from a local file.
fs.readFile('client_secret.json', function processClientSecrets(err, content) {
if (err) {
console.log('Error loading client secret file: ' + err);
return;
}
// Authorize a client with the loaded credentials, then call the
// Google Sheets API.
authorize(JSON.parse(content), listMajors);
});
/**
* Create an OAuth2 client with the given credentials, and then execute the
* given callback function.
*
* @param {Object} credentials The authorization client credentials.
* @param {function} callback The callback to call with the authorized client.
*/
function authorize(credentials, callback) {
var clientSecret = credentials.installed.client_secret;
var clientId = credentials.installed.client_id;
var redirectUrl = credentials.installed.redirect_uris[0];
var auth = new googleAuth();
var oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);
// Check if we have previously stored a token.
fs.readFile(TOKEN_PATH, function(err, token) {
if (err) {
getNewToken(oauth2Client, callback);
} else {
oauth2Client.credentials = JSON.parse(token);
callback(oauth2Client);
}
});
}
/**
* Get and store new token after prompting for user authorization, and then
* execute the given callback with the authorized OAuth2 client.
*
* @param {google.auth.OAuth2} oauth2Client The OAuth2 client to get token for.
* @param {getEventsCallback} callback The callback to call with the authorized
* client.
*/
function getNewToken(oauth2Client, callback) {
var authUrl = oauth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES
});
console.log('Authorize this app by visiting this url: ', authUrl);
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter the code from that page here: ', function(code) {
rl.close();
oauth2Client.getToken(code, function(err, token) {
if (err) {
console.log('Error while trying to retrieve access token', err);
return;
}
oauth2Client.credentials = token;
storeToken(token);
callback(oauth2Client);
});
});
}
/**
* Store token to disk be used in later program executions.
*
* @param {Object} token The token to store to disk.
*/
function storeToken(token) {
try {
fs.mkdirSync(TOKEN_DIR);
} catch (err) {
if (err.code != 'EEXIST') {
throw err;
}
}
fs.writeFile(TOKEN_PATH, JSON.stringify(token));
console.log('Token stored to ' + TOKEN_PATH);
}
/**
* Print the names and majors of students in a sample spreadsheet:
* https://docs.google.com/spreadsheets/d/1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms/edit
*/
function listMajors(auth) {
var sheets = google.sheets('v4');
sheets.spreadsheets.values.get({
auth: auth,
spreadsheetId: '1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms',
range: 'Class Data!A2:E',
}, function(err, response) {
if (err) {
console.log('The API returned an error: ' + err);
return;
}
var rows = response.values;
if (rows.length == 0) {
console.log('No data found.');
} else {
console.log('Name, Major:');
for (var i = 0; i < rows.length; i++) {
var row = rows[i];
// Print columns A and E, which correspond to indices 0 and 4.
console.log('%s, %s', row[0], row[4]);
}
}
});
}
附註:日後如果還要管理自己的Google API憑證,請由https://console.developers.google.com/登入後,便可以看到這次申請的憑證