从谷歌文档 API 保存应用程序/pdf 类型的正确方法是什么?

Question

我尝试将谷歌文档文件导出为 pdf 并保存，但所有带有每种编码的文件都不起作用。

async function downloadDoc(auth, res, body){
const drive = google.drive({ version: 'v3', auth });
drive.files.export({
fileId: '1gJd7167Dw5rSJYWdAfkprtCfjIyqIQu4R9eYpIkg7ho',
mimeType: 'application/pdf'
}, (err, driveResponse) => {
if (err) return console.log('The API returned an error: ' + err);
fs.writeFile('./tmp/tempfile1.pdf', driveResponse.data , {encoding:'ascii'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile2.pdf', driveResponse.data , {encoding:'base64'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile3.pdf', driveResponse.data , {encoding:'binary'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile4.pdf', driveResponse.data , {encoding:'hex'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile5.pdf', driveResponse.data , {encoding:'ucs2'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile6.pdf', driveResponse.data , {encoding:'utf-8'}, (err)=>console.log(err));
fs.writeFile('./tmp/tempfile7.pdf', driveResponse.data , {encoding:'latin1'}, (err)=>console.log(err));
// (err) => {
//     if (err) console.log(err);
//     console.log("save");
// });
res.send(driveResponse);
return (200);
});
}

请帮忙！！

附言。我尝试从这里使用 API 测试，第一行结果显示

%PDF-1.5
%¿÷¢þ
2 0 obj

而我的显示

%PDF-1.5n%����n2 0 obj

我必须先编码或解码任何东西吗？

Answer 1

首先，确保您的软件包是最新的，然后尝试：

$ npm uninstall --save google-auth-library
$ npm install --save googleapis@39

谷歌推荐(这里(：

'use strict';
const {google} = require('googleapis');
const sampleClient = require('../sampleclient');
const fs = require('fs');
const os = require('os');
const path = require('path');
const drive = google.drive({
version: 'v3',
auth: sampleClient.oAuth2Client,
});
async function runSample() {
// [START main_body]
const fileId = '1gJd7167Dw5rSJYWdAfkprtCfjIyqIQu4R9eYpIkg7ho';
const destPath = path.join(os.tmpdir(), 'temp.pdf');
const dest = fs.createWriteStream(destPath);
const res = await drive.files.export(
{fileId, mimeType: 'application/pdf'},
{responseType: 'stream'}
);
await new Promise((resolve, reject) => {
res.data
.on('end', () => {
console.log(`Done downloading document: ${destPath}.`);
resolve();
})
.on('error', err => {
console.error('Error downloading document.');
reject(err);
})
.pipe(dest);
});

这基本上是谷歌API不匹配版本的问题。

或

async function downloadDoc(auth, res, body){
const drive = google.drive({ version: 'v3', auth });
const dest = fs.createWriteStream(name + '.pdf');// Added new line
drive.files.export({
fileId: '1gJd7167Dw5rSJYWdAfkprtCfjIyqIQu4R9eYpIkg7ho',
mimeType: 'application/pdf'
}, (err, driveResponse) => {

如果全部失败，请尝试使用 v2

gapi.client.drive.files.export({
fileId: sourceId, 
mimeType: "application/pdf"
});

Answer 2

尝试使用谷歌推荐的方法， https://github.com/googleapis/google-api-nodejs-client/blob/main/samples/drive/export.js