preSigned URLS Promise TypeError:res.json不是函数NodeJS响应错误

Question

我正试图为存储在我的私人s3存储桶中的文件创建一个预签名url数组，但由于res.json函数错误，我似乎无法返回它们。尽管有很多线程有同样的问题，但我还是无法解决这个问题。我的代码出了什么问题？

const express = require('express');
const AWS = require('aws-sdk');
let config = require('./config');
let app = express();
var s3 = new AWS.S3();
s3.config.update({
accessKeyId: config.accessKeyId,
secretAccessKey: config.secretAccessKey,
region: 'us-east-2'
});

// Create an array that houses pre-signed Urls
// Loop through x amt of times (depending on number of documents)
// Push each url into an array called 'preSignedUrls'
// Exit loop and reset array to re-generate new urls
var router = express.Router();

function getSignedURL(res) {
Key = ['file1.pdf', 'file2.pdf'];
let promises = [];
let i = 0;
while(i < Key.length){
var params = {
Bucket: 'bucketname',
Key: Key[i],
Expires: 36000
};
promises.push(s3.getSignedUrlPromise('getObject', params));
console.log(promises)
i++;
}
Promise.all(promises)
.then( response => {
res.json(response);
}, function(err) { 
console.log(err);
});
}

router.route('/get_signed_url')
.get(getSignedURL);
//                 if (err) {
// console.log(err);
// return next(err);
router.route('/get_signed_url')
app.use('/v1', router);
var PORT = process.env.PORT || 3001;
var HOST = process.env.HOST || '11.123.346.789';
console.log("Listening on", HOST, PORT);
app.listen(PORT, HOST);

以下是我得到的：(node:6717) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): TypeError: res.json is not a function

Answer 1

请求控制器的签名是getSignedURL(req, res )，响应对象是第二个，而不是第一个。