using aws-sdk to upload images to s3 using nodejs

Question

I want to upload images to amazon web server and for that I am using aws-sdk with nodejs.

I am able to upload images to the s3 bucket, but when I click on the URL to access them I get access-denied error.

Here is my configuration

     var AWS = require('aws-sdk');

     //aws credentials
     AWS.config = new AWS.Config();
     AWS.config.accessKeyId = "<access_key>";
     AWS.config.secretAccessKey = "<secret_key>";
     AWS.config.region = "ap-southeast-1";
     AWS.config.apiVersions = {
        "s3": "2006-03-01"
     }

    var s3 = new AWS.S3();

    var bodystream = fs.createReadStream(req.files.pic.path);

    var params = {
        'Bucket': '<bucket_name>',
        'Key': 'uploads/images/' + req.files.pic.name,
        'Body': bodystream,
        'ContentEncoding': 'base64', 
        'ContentType ': 'image/jpeg'
     };

     //also tried with s3.putObject
     s3.upload(params, function(err, data){
        console.log('after s3 upload====', err, data);
     })

Images are uploading successfully but their content-type is application/octet. Also I think that there is some permission issue, because when I add a new permission then I am able to download the image but not able to see it.

Can you tell me what is wrong with this configuration and also I want to know the difference between s3.upload and s3.putObject method.

Jim Wrubel · Accepted Answer · 2017-04-08 16:38:22Z

4

In order to specify Content-Type header you need to define Metadata section:

var params = {
    'Bucket': '<bucket_name>',
    'Key': 'uploads/images/' + req.files.pic.name,
    'Body': bodystream,
    'ContentEncoding': 'base64', 
    Metadata: {
        'Content-Type': 'image/jpeg'
    }

 };

edited Apr 8, 2017 at 16:38

Jim Wrubel

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answered Oct 30, 2015 at 7:23

Vsevolod Goloviznin

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8 Comments

Bhushan Goel Over a year ago

getting this error if I try to specify content-type this way { [SignatureDoesNotMatch: The request signature we calculated does not match the signature you provided. Check your key and signing method.] message: 'The request signature we calculated does not match the signature you provided. Check your key and signing method.', code: 'SignatureDoesNotMatch', time: Fri Oct 30 2015 12:55:30 GMT+0530 (IST), statusCode: 403, retryable: false, retryDelay: 30 }

Vsevolod Goloviznin Over a year ago

@BhushanGoel I've fixed the code, forgot about the dash in content-type

Bhushan Goel Over a year ago

yeah it worked, now in s3 console I can see this in the metadata: x-amz-meta-content-type: image/png

Bhushan Goel Over a year ago

but how can I set the permission, I am still getting access denied error

Vsevolod Goloviznin Over a year ago

@BhushanGoel you can either use putObject and specify ACL there or you can use putBucketAcl to setACL separately

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