Oct 13, 2024
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Automate to Upload Files on Amazon S3 Through Salesforce Apex

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Amazon S3 is a web service offered by Amazon Web Services. Amazon S3 provides storage through web services interfaces.

With the help of the following code, you can upload file on Amazon S3 through Apex

Prerequisites

  • Need account on AWS
  • Create bucket on AWS
  • Bucket Name, Secret key, key, and region is used for authentication

Apex Class Code

Attachment attach = [select Body,ContentType,Name from Attachment where id ={AttachmentID} limit 1];
String attachmentBody = EncodingUtil.base64Encode(attach.Body);
String formattedDateString = Datetime.now().formatGMT('EEE, dd MMM yyyy HH:mm:ss z');
String key = '******************’'; //AWS key
String secret = '*****************'; //AWS Secret key
String bucketname = 'bucketName'; //AWS bucket name
String host = 's3-us-west-1.amazonaws.com';
String method = 'PUT';
String filename = attach.Id + '-' + attach.Name;

HttpRequest req = new HttpRequest();
req.setMethod(method);
req.setEndpoint('https://' + bucketname + '.' + host + '/' + filename);
req.setHeader('Host', bucketname + '.' + host);
req.setHeader('Content-Length', String.valueOf(attachmentBody.length()));
req.setHeader('Content-Encoding', 'UTF-8');
req.setHeader('Content-type', attach.ContentType);
req.setHeader('Connection', 'keep-alive');
req.setHeader('Date', formattedDateString);
req.setHeader('ACL', 'public-read-write');
req.setBodyAsBlob(attach.Body);

String stringToSign = 'PUTnn' + attach.ContentType + 'n' + formattedDateString + 'n' + '/' + bucketname + '/' + filename;
String encodedStringToSign = EncodingUtil.urlEncode(stringToSign, 'UTF-8');
Blob mac = Crypto.generateMac('HMACSHA1', blob.valueof(stringToSign),blob.valueof(secret));
String signedKey  = EncodingUtil.base64Encode(mac);
String authHeader = 'AWS' + ' ' + key + ':' + signedKey ;

req.setHeader('Authorization',authHeader);

String decoded = EncodingUtil.urlDecode(encodedStringToSign , 'UTF-8');

Http http = new Http();
HTTPResponse res = http.send(req);

You need to copy this code in your apex class with some inputs and it helps you to upload files to Amazon S3 with Salesforce.
Happy Salesforce 🙂

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Expertise: Global Macroeconomics, Business Strategy, Emerging Markets Bio: Rajeev Sharma is a seasoned investment strategist with over two decades of experience navigating the ever-evolving global market landscape. A veteran of Wall Street and a sought-after advisor to Fortune 500 companies, Rajeev brings a wealth of knowledge and expertise to TheStarBizNews. His insightful analyses of global economic trends, coupled with his keen understanding of regional specificities, provide invaluable guidance for businesses and investors alike. Fluent in four languages and a frequent speaker at international conferences, Rajeev brings a cosmopolitan flair to his writing, drawing connections between seemingly disparate events to paint a clear picture of the interconnected world we live in.