Node.js v10.15.2，googleapis v40.0.0
我尝试过
const dest = fs.createWriteStream(`/Users/user/Downloads/${fileId}.mp4`);
drive.files.get({
fileId,
alt: 'media'
},
{
responseType: 'stream'
}, (err, res) => {
res.data.on('end', () => {
console.log('Done downloading file!');
})
.on('error', console.error)
.pipe(dest);
});
出现错误
$ node .
Files:
20140810_125633.mp4 (1SwYm5Z1zPczZnDulmsbA9wrEJ-JT-hwE)
Getting started (0B3K2QXOGSOFRc3RhcnRlcl9maWxl)
(node:62335) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'data' of undefined
at drive.files.get (/Users/user/Development/app/google_drive_integration/index.js:104:9)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:62335) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:62335) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:62335) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'data' of undefined
at drive.files.get (/Users/user/Development/app/google_drive_integration/index.js:104:9)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:62335) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
此外，我尝试了Google API参考中的this example。
const dest = fs.createWriteStream(`/Users/user/Downloads/${fileId}.mp4`);
drive.files.get({
fileId,
alt: 'media'
})
.on('end', function () {
console.log('Done');
})
.on('error', function (err) {
console.log('Error during download', err);
})
.pipe(dest);
出现错误
$ node .
Files:
20140810_125633.mp4 (1SwYm5Z1zPczZnDulmsbA9wrEJ-JT-hwE)
(node:62336) UnhandledPromiseRejectionWarning: TypeError: drive.files.get(...).on is not a function
at downloadFile1 (/Users/user/Development/app/google_drive_integration/index.js:118:8)
at files.map (/Users/user/Development/app/google_drive_integration/index.js:87:9)
at Array.map (<anonymous>)
at drive.files.list (/Users/user/Development/app/google_drive_integration/index.js:84:13)
at createAPIRequestAsync.then.r (/Users/user/Development/app/google_drive_integration/node_modules/googleapis-common/build/src/apirequest.js:48:53)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:62336) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:62336) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:62336) UnhandledPromiseRejectionWarning: Error: The user has not granted the app 619229308650 read access to the file 1SwYm5Z1zPczZnDulmsbA9wrEJ-JT-hwE.
at Gaxios.<anonymous> (/Users/user/Development/app/google_drive_integration/node_modules/gaxios/build/src/gaxios.js:73:27)
at Generator.next (<anonymous>)
at fulfilled (/Users/user/Development/app/google_drive_integration/node_modules/gaxios/build/src/gaxios.js:16:58)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:62336) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
我成功列出了文件20140810_125633.mp4，但无法下载。我在做什么错了？
我拥有的所有代码
const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
// If modifying these scopes, delete token.json.
const SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly'];
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
const TOKEN_PATH = 'token.json';
// Load client secrets from a local file.
fs.readFile('credentials.json', (err, content) => {
if (err) return console.log('Error loading client secret file:', err);
// Authorize a client with credentials, then call the Google Drive API.
authorize(JSON.parse(content), listFiles);
});
/**
* 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) {
const {client_secret, client_id, redirect_uris} = credentials.installed;
const oAuth2Client = new google.auth.OAuth2(
client_id, client_secret, redirect_uris[0]);
// Check if we have previously stored a token.
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) return getAccessToken(oAuth2Client, callback);
oAuth2Client.setCredentials(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 for the authorized client.
*/
function getAccessToken(oAuth2Client, callback) {
const authUrl = oAuth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES,
});
console.log('Authorize this app by visiting this url:', authUrl);
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
rl.question('Enter the code from that page here: ', (code) => {
rl.close();
oAuth2Client.getToken(code, (err, token) => {
if (err) return console.error('Error retrieving access token', err);
oAuth2Client.setCredentials(token);
// Store the token to disk for later program executions
fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
if (err) return console.error(err);
console.log('Token stored to', TOKEN_PATH);
});
callback(oAuth2Client);
});
});
}
/**
* Lists the names and IDs of up to 10 files.
* @param {google.auth.OAuth2} auth An authorized OAuth2 client.
*/
function listFiles(auth) {
const drive = google.drive({version: 'v3', auth});
drive.files.list({
q: "mimeType != 'application/vnd.google-apps.folder'",
pageSize: 1000,
fields: 'nextPageToken, files(id, name)',
}, (err, res) => {
if (err) return console.log('The API returned an error: ' + err);
const files = res.data.files;
if (files.length) {
console.log('Files:');
files.map((file) => {
console.log(`${file.name} (${file.id})`);
downloadFile0(drive, file.id);
downloadFile1(drive, file.id);
});
} else {
console.log('No files found.');
}
});
}
function downloadFile0(drive, fileId) {
const dest = fs.createWriteStream(`/Users/user/Downloads/${fileId}.mp4`);
drive.files.get({
fileId,
alt: 'media'
},
{
responseType: 'stream'
}, (err, res) => {
res.data.on('end', () => {
console.log('Done downloading file!');
})
.on('error', console.error)
.pipe(dest);
});
}
function downloadFile1(drive, fileId) {
const dest = fs.createWriteStream(`/Users/user/Downloads/${fileId}.mp4`);
drive.files.get({
fileId,
alt: 'media'
})
.on('end', function () {
console.log('Done');
})
.on('error', function (err) {
console.log('Error during download', err);
})
.pipe(dest);
}
答案 0 :(得分：0)
在API v3中，您从“ drive.files.get”中获得了一个承诺，并在承诺解决后获得了“数据”流
function downloadFile(drive, fileId, fileName) {
const filePath = `/Users/user/Downloads/${fileName}`;
const dest = fs.createWriteStream(filePath);
let progress = 0;
drive.files.get(
{ fileId, alt: 'media' },
{ responseType: 'stream' }
).then(res => {
res.data
.on('end', () => {
console.log('Done downloading file.');
})
.on('error', err => {
console.error('Error downloading file.');
})
.on('data', d => {
progress += d.length;
if (process.stdout.isTTY) {
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write(`Downloaded ${progress} bytes`);
}
})
.pipe(dest);
});
}