Upload file into S3 bucket with correct format

Question

I had uploaded a .txt file to AWS S3 bucket. on opening file, it showed data like

aHR0cHM6Ly90ZXN0LnNhbGVzZm9yY2UuY29tLw==

If we pass this string data aHR0cHM6Ly90ZXN0LnNhbGVzZm9yY2UuY29tLw== based on the util provided by https://gist.github.com/nxtr/bca4984cd3753261995c421711729629 displayed actual correct data present in the txt file as "https://test.salesforce.com/".

So how can we upload file .txt into AWS S3 bucket, that actually displays correct data "https://test.salesforce.com/" instead of aHR0cHM6Ly90ZXN0LnNhbGVzZm9yY2UuY29tLw==

Can anyone please help. thanks,

Thanks for reply @sfdcfox these are my observations 1) file uploaded successfully, but with above issues, this is the request

String url = 'https://' + this.bucketName + '.s3.amazonaws.com/' + this.folderName + '/' + this.fileName;   
        HttpRequest req = new HttpRequest();   
        req.setEndpoint(url);
        req.setMethod('PUT');
        req.setHeader('X-Amz-Content-SHA256',  this.getXAmzContent());
        req.setHeader('X-Amz-Date', this.timestamp);
        req.setHeader('Authorization', this.getPutAuthHeader());
        req.setBody(body);

2) Then tried your code,

String url = 'https://' + this.bucketName + '.s3.amazonaws.com/' + this.folderName + '/' + this.fileName;   
        HttpRequest req = new HttpRequest();   
        req.setEndpoint(url);
        req.setMethod('PUT');
        req.setHeader('X-Amz-Content-SHA256',  this.getXAmzContent());
        req.setHeader('X-Amz-Date', this.timestamp);
        req.setHeader('Authorization', this.getPutAuthHeader());
        Blob testBlob = EncodingUtil.base64Decode(body);
        if(testBlob.size() > 0) {
        req.setHeader('Content-Length', String.valueOf(testBlob.size()));
        req.setBodyAsBlob(testBlob);
       }

getting this error

<Code>XAmzContentSHA256Mismatch</Code><Message>The provided 'x-amz-content-sha256' header does not match what was computed.</Message><ClientComputedContentSHA256>

What mistake I making ?

Answer 1

You need to use HttpRequest.setBodyAsBlob. Presumably, you're currently using EncodingUtil.bsae64Encode followed by HttpRequest.setBody, which will result in the encoding that you see. In my AWS code, that part of the code looks like:

    if(payload.size() > 0) {
        setHeader('Content-Length', String.valueOf(payload.size()));
        request.setBodyAsBlob(payload);
    }