Nodejs AWS SDK S3 Generate Presigned URL

Dustin,

Your code is correct, double check following:

1. Your bucket access policy.

2. Your bucket permission via your API key.

3. Your API key and secret.

4. Your bucket name and key.

Since this question is very popular and the most popular answer is saying your code is correct, but there is a bit of problem in the code which might lead a frustrating problem. So, here is a working code

    AWS.config.update({ 
        accessKeyId: ':)))',
        secretAccessKey: ':DDDD',
        region: 'ap-south-1',
        signatureVersion: 'v4'
    });

    const s3 = new AWS.S3()
    const myBucket = ':)))))'
    const myKey = ':DDDDDD'
    const signedUrlExpireSeconds = 60 * 5

    const url = s3.getSignedUrl('getObject', {
        Bucket: myBucket,
        Key: myKey,
        Expires: signedUrlExpireSeconds
    });

    console.log(url);

The noticeable difference is the s3 object is created after the config update, without this the config is not effective and the generated url doesn't work.

Here is the complete code for generating pre-signed (put-object) URL for any type of file in S3.

• If you want you can include expiration time using Expire parameter in parameter.
• The below code will upload any type of file like excel(xlsx, pdf, jpeg)

    const AWS = require('aws-sdk');
    const fs = require('fs');
    const axios = require('axios');
    const s3 = new AWS.S3();
    const filePath = 'C:/Users/XXXXXX/Downloads/invoice.pdf';
    
    
    var params = {
        Bucket: 'testing-presigned-url-dev',
        Key: 'dummy.pdf',
        "ContentType": "application/octet-stream"
    };
    
    
    s3.getSignedUrl('putObject', params, function (err, url) {
        console.log('The URL is', url);
    
        fs.writeFileSync("./url.txt", url);
    
    
        axios({
            method: "put",
            url,
            data: fs.readFileSync(filePath),
            headers: {
                "Content-Type": "application/octet-stream"
            }
        })
            .then((result) => {
                console.log('result', result);
    
            }).catch((err) => {
                console.log('err', err);
    
            });
    
    });