looking for the equivelant golang code in the aws s3 sdk, but have not found it yet. Anyone help here??? Thanks.

[JM]

I am trying to find the equivalent of getSignedURL and hoping i'm just blind and overlooking it somewhere.


//Generates a short lives signed url to be used from the client to upload an image.
function(req, res){
    aws.config.update({accessKeyId: AWS_ACCESS_KEY , secretAccessKey: AWS_SECRET_KEY });
    aws.config.update({region: process.env.REGION , signatureVersion: 'v4' });
    var s3 = new aws.S3();
    var s3_params = {
        Bucket: S3_BUCKET,
        Key: req.query.file_name,
        Expires: 60,
        ContentType: req.query.file_type,
        ACL: 'public-read'
    };
    s3.getSignedUrl('putObject', s3_params, function(err, data){
        if(err){
            console.log(err);
        } else {
            var return_data = {
                signed_request: data,
                url: 'https://'+S3_BUCKET+'.s3.amazonaws.com/'+req.query.file_name
            };
            res.write(JSON.stringify(return_data));
            res.end();
        }
    });

[Peter Waller]

Here's an example. It uses the machine's role credentials automatically. If you want to specify a secret manually, you'll have to read the documentation.

https://github.com/aws/aws-sdk-go/

http://aws.amazon.com/sdk-for-go/

I can't guarantee it's uptodate, but something similar to this should work.

---

​// SignGetRequest returns a signed URL for downloading s3://{{bucket}}/{{key}}

// with a given time-to-live.

func SignGetRequest(bucket, key string, ttl time.Duration) (string, error) {

svc := s3.New(nil)

req, _ := svc.GetObjectRequest(&s3.GetObjectInput{

Bucket: aws.String(bucket),

Key:    aws.String(key),

})

url, err := req.Presign(ttl)

if err != nil {

return "", &RequestError{path: path.Join(bucket, key), baseError: err}

}

return url, nil

}

[Joshua Boelter]

Another example.

- ContentType below is optional, but would be part of the signed headers if you use it

- The req.HTTPRequest.Header.Set() allows you to add additional headers that will be part of the signed request

https://github.com/aws/aws-sdk-go/issues/530

req, _ := s3Svc.PutObjectRequest(&s3.PutObjectInput{

Bucket:      aws.String(bucket),

Key:         aws.String(key),

Body:        nil,

ContentType: aws.String("application/octet-stream"),

})

req.HTTPRequest.Header.Set("Content-MD5", b64hash)

req.Operation.HTTPMethod = "PUT"

url, err := req.Presign(24 * time.Hour)