我的目標是從谷歌驅動器文件夾及其子文件夾獲取文件列表作爲json字符串。所以我可以使用express將它暴露爲其他應用程序可以連接到它的API端點。Nodejs exports.module如何將變量導出到其他腳本
該代碼正在工作。我得到我想要的一切,但我不知道怎麼我的數據變量app.js
// get-filelist.js
var GoogleTokenProvider = require("refresh-token").GoogleTokenProvider,
request = require('request'),
async = require('async'),
data
const CLIENT_ID = "514...p24.apps.googleusercontent.com";
const CLIENT_SECRET = "VQs...VgF";
const REFRESH_TOKEN = "1/Fr...MdQ"; // get it from: https://developers.google.com/oauthplayground/
const FOLDER_ID = '0Bw...RXM';
async.waterfall([
//-----------------------------
// Obtain a new access token
//-----------------------------
function(callback) {
var tokenProvider = new GoogleTokenProvider({
'refresh_token': REFRESH_TOKEN,
'client_id': CLIENT_ID,
'client_secret': CLIENT_SECRET
});
tokenProvider.getToken(callback);
},
//-----------------------------
// connect to google drive, look for the folder (FOLDER_ID) and list its content inclusive files inside subfolders.
// return a list of those files with its Title, Description, and view Url.
//-----------------------------
function(accessToken, callback) {
// access token is here
console.log(accessToken);
// function for token to connect to google api
var googleapis = require('./lib/googleapis.js');
var auth = new googleapis.OAuth2Client();
auth.setCredentials({
access_token: accessToken
});
googleapis.discover('drive', 'v2').execute(function(err, client) {
getFiles()
function getFiles(callback) {
retrieveAllFilesInFolder(FOLDER_ID, 'root' ,getFilesInfo);
}
function retrieveAllFilesInFolder(folderId, folderName, callback) {
var retrievePageOfChildren = function (request, result) {
request.execute(function (err, resp) {
result = result.concat(resp.items);
var nextPageToken = resp.nextPageToken;
if (nextPageToken) {
request = client.drive.children.list({
'folderId': folderId,
'pageToken': nextPageToken
}).withAuthClient(auth);
retrievePageOfChildren(request, result);
} else {
callback(result, folderName);
}
});
}
var initialRequest = client.drive.children.list({
'folderId': folderId
}).withAuthClient(auth);
retrievePageOfChildren(initialRequest, []);
}
function getFilesInfo(result, folderName) {
result.forEach(function (object) {
request = client.drive.files.get({
'fileId': object.id
}).withAuthClient(auth);
request.execute(function (err, resp) {
// if it's a folder lets get it's contents
if(resp.mimeType === "application/vnd.google-apps.folder"){
retrieveAllFilesInFolder(resp.id, resp.title, getFilesInfo);
}else{
/*if(!resp.hasOwnProperty(folderName)){
console.log(resp.mimeType);
}*/
url = "http://drive.google.com/uc?export=view&id="+ resp.id;
html = '<img src="' + url+ '"/>';
// here do stuff to get it to json
data = JSON.stringify({ title : resp.title, description : resp.description, url : url});
//console.log(data);
//console.log(resp.title);console.log(resp.description);console.log(url);
//.....
}
});
});
}
});
}
]);
// export the file list as json string to expose as an API endpoint
console.log('my data: ' + data);
exports.files = function() { return data; };
,並在我的app.js出口我用這個
// app.js
var jsonData = require('./get-filelist');
console.log('output: ' + jsonData.files());
數據變量的應用程序。 js不包含任何數據,同時檢查函數getFilesInfo()內的輸出正在工作。
那麼,如何讓我的數據變量可以在其他腳本中訪問?
您是不是要找'的console.log( '輸出:' + jsonData.files());'? (調用函數) – Scimonster 2014-09-21 11:02:21
是的。你是對的。它應該在app.js console.log('output:'+ jsonData.files())中讀取;謝謝。 但仍然,我的數據變量不包含任何值。 – ron 2014-09-21 11:05:45