我正在尝试在Google云端硬盘上列出我的文件。
我一直试图在没有成功的情况下完成这几周。我一直在尝试PHP，现在我已经进入Javascript，看看我是否可以得到任何工作的例子。
这是我正在使用
的例子http://runnable.com/UTlPMF-f2W1TAAAj/list-files-on-google-drive
所以我上传了我的文件，在我的Google控制台上启用了Drive API，具有正确的范围，拥有客户端密码，客户端ID
我正在使用自己的帐户在localhost上进行测试。
到目前为止主要的html页面加载，我点击登录按钮，然后有一个空白弹出窗口，没有别的，没有错误。
这是我的文件
oauth.js
var request = require('request')
, qs = require('qs')
, callbackURL = 'http://'+process.env.OPENSHIFT_APP_DNS+'/callback';
var state = ''
, access_token = ''
, token_type = ''
, expires = '';
function login(req, res) {
state = Math.floor(Math.random() * 1e19);
exports.state = state;
var params = {
response_type: 'code',
client_id: 'myclientid',
redirect_uri: callbackURL,
state: state,
display: 'popup',
scope: 'https://www.googleapis.com/auth/drive' // specify the "Google Drive" scope
};
params = qs.stringify(params);
res.writeHead(200, {'Content-type': 'text/plain'});
res.end('https://accounts.google.com/o/oauth2/auth?'+params);
}
function callback(req, res) {
var code = req.query.code
, cb_state = req.query.state
, error = req.query.error;
if (state == cb_state) {
if (code !== undefined) {
var params = {
code: code,
client_id: 'myclientid',
client_secret: 'myclientsecret',
redirect_uri: callbackURL,
grant_type: 'authorization_code'
};
request.post('https://accounts.google.com/o/oauth2/token', {form:params}, function(err, resp, body) {
var results = JSON.parse(body);
exports.access_token = access_token = results.access_token;
exports.token_type = token_type = results.token_type;
exports.expires = expires = results.expires_in;
console.log("Connected to Google");
// close the popup
var output = '<html><head></head><body onload="window.close();">Close this window</body></html>';
res.writeHead(200, {'Content-Type': 'text/html'});
res.end(output);
});
} else {
console.error('Code is undefined: '+code);
console.error('Error: '+ error);
}
} else {
console.log('Mismatch with variable "state". Redirecting to /');
res.redirect('/');
}
}
exports.login = login;
exports.callback = callback;
server.js
var express = require('express')
, request = require('request')
, oauth = require('./oauth')
, app = express();
// Setup middleware
app.use(express.static(__dirname));
// List out file that are in your Google Drive
app.get('/list', function(req, res) {
// Check to see if user has an access_token first
if (oauth.access_token) {
// URL endpoint and params needed to make the API call
var url = 'https://www.googleapis.com/drive/v2/files';
var params = {
access_token: oauth.access_token
};
// Send the API request
request.get({url:url, qs:params}, function(err, resp, body) {
// Handle any errors that may occur
if (err) return console.error("Error occured: ", err);
var list = JSON.parse(body);
if (list.error) return console.error("Error returned from Google: ", list.error);
// Generate output
if (list.items && list.items.length > 0) {
var file = ''
, iconLink = ''
, link = ''
, output = '<h1>Your Google Drive</h1><ul>';
for(var i=0; i<list.items.length; i++) {
file = list.items[i].title;
iconLink = list.items[i].iconLink;
link = list.items[i].alternateLink;
output += '<li style="list-style- image:url('+iconLink+');"><a href="'+link+'" target="_blank">'+file+'</a></li>';
}
output += '</ul>';
//Send output as response
res.writeHead(200, {'Content-Type': 'text/html'});
res.end(output);
} else { // Alternate output if no files exist on Drive
console.log('Could not retrieve any items.');
res.writeHead(200, {'Content-Type': 'text/html'});
res.end('<p>Your drive appears to be empty.</p>')
}
});
// If no access_token was found, start the OAuth flow
} else {
console.log("Could not determine if user was authed. Redirecting to /");
res.redirect('/');
}
});
// Handle OAuth Routes
app.get('/login', oauth.login);
app.get('/callback', oauth.callback);
app.listen(80);
的index.html
<html>
<head>
<title>Google server-side OAuth v2 Example</title>
<script src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
var url = '';
var b = '';
$(document).ready(function() {
$.get('/login', function(data) {
url = data;
});
var interval = window.setInterval((function() {
if (b.closed) {
window.clearInterval(interval);
window.location = './list';
}
}),1000);
});
</script>
<link rel="stylesheet" href="styles.css" type="text/css">
</head>
<body>
<h1 id="header">Google Drive: Retrieve list of files</h1>
<p>Get started by logging into your Google account using the button below</p>
<button id="login" onclick="b = window.open(url, 'window', 'status=0,menubar=0,resizable=1,width=500,height=800;')">Login to Google</button>
</body>
</html>
的package.json
{
"name": "facebook-oauthv2-js-sdk-example",
"version": "0.0.1",
"description": "A sample code project using Google to perform server-side OAuth v2",
"dependencies": {
"express": "*",
"qs": "*",
"request": "*"
},
"engine": "node 0.6.x"
}
的style.css
body{
margin: 0;
padding: 10px;
font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
}
h1{
padding: 10px 0;
font-size: 18px;
font-weight: normal;
color: #444;
border-bottom: 1px solid #ccc;
margin: 0 0 20px;
text-transform:capitalize;
}
有关如何列出我的文件的任何想法？
答案 0 :(得分：1)
首先，我看到你使用的openhift env变量可能是动态的，或者与你在api控制台上注册的不一样。
其次，您没有保存第一次允许在同意屏幕上访问时获得的refresh_token，也许access_token已过期，因此您可以使用该refresh_token刷新它
但是，我建议使用google-api-nodejs-client访问官方google apis客户端库google api。
如果你使用这个库，那么你不必担心刷新过期的访问令牌，你可以通过库api和缓存得到很好的干净的syntex。
我在博客上写了这篇文章 http://manan-vaghasiya.in/post/integrating-your-node.js-app-with-google-apis