Getting error message of Status=Bad Request, Status Code=400

Hi,

I am getting "status code is 200" pass when I test it through POSTMAN. I am also able to see my uploaded file on my s3 bucket folder. This is the endpoint I am using "https://personalsfbucket.s3.ap-south-1.amazonaws.com/DocumentUploaded/Demo". Now when I use the same endpoint in my Code :
req.setEndpoint('https://' + bucketname + '.' + host + '/' + foldername + '/' + fileName);

I am getting "System.HttpResponse[Status=Bad Request, StatusCode=400]".

Any Help or suggestion!!!!

For your reference here's my code:

public with sharing class AWS_File_Upload_Ctrl { public static String testIntegration(String filename, String base64Data , String contentType) { System.debug('filename---->>'+filename); System.debug('base64Data---->>'+base64Data); System.debug('contentType---->>'+contentType); //Blob beforeblob = EncodingUtil.base64Decode(base64Data); Blob beforeblob = Blob.valueOf(base64Data); String attachmentBody = EncodingUtil.base64Encode(beforeblob); String formattedDateString = Datetime.now().formatGMT('EEE, dd MMM yyyy HH:mm:ss z'); String key = 'AKIAJNWEGTHJFMQQLPBA'; String secret = '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'; String bucketname = 'personalsfbucket'; String foldername = 'DocumentUploaded'; String host = 's3.ap-south-1.amazonaws.com'; String method = 'PUT'; HttpRequest req = new HttpRequest(); req.setMethod(method); req.setEndpoint('https://' + bucketname + '.' + host + '/' + foldername + '/' + fileName); //('https://' + host + '/' + bucketname + '/' + filename); req.setTimeout(120000); req.setHeader('Host', bucketname + '.' + host); req.setHeader('Content-Length', String.valueOf(attachmentBody.length())); req.setHeader('Content-Encoding', 'base64'); req.setHeader('Content-type', contentType); req.setHeader('Connection', 'keep-alive'); req.setHeader('Date', formattedDateString); req.setHeader('ACL', 'public-read'); req.setBodyAsBlob(beforeblob); System.debug('req---->'+req); /* String stringToSign = 'PUT\n\n' + contentType + '\n' + formattedDateString + '\n' + '/' + bucketname + '/' + bucketname + '/' + filename; */ String stringToSign = 'PUT\n' + contentType + '\n' + formattedDateString + '\n' + '/' + bucketname + '/' + bucketname + '/' + filename; System.debug('stringToSign---->>'+stringToSign); String encodedStringToSign = EncodingUtil.urlEncode(stringToSign, 'UTF-8'); Blob mac = Crypto.generateMac('HMACSHA1', blob.valueof(stringToSign),blob.valueof(secret)); String signed = EncodingUtil.base64Encode(mac); String authHeader = 'AWS' + ' ' + key + ':' + signed; System.debug('authHeader---->>'+authHeader); req.setHeader('Authorization',authHeader); String decoded = EncodingUtil.urlDecode(encodedStringToSign , 'UTF-8'); Http http = new Http(); HTTPResponse res = http.send(req); System.debug('RESPONSE STRING: ' + res.toString()); System.debug('RESPONSE STATUS: ' + res.getStatus()); System.debug('STATUS_CODE: ' + res.getStatusCode()); if(res.getStatusCode() == 200){ String ReturnUrl = 'https://'+host+'/'+bucketname+'/'+bucketname+'/'+filename; System.debug('ReturnUrl---->>'+ReturnUrl); return ReturnUrl; return 'ERROR';

What I am trying to do is uploading file to s3 bucket of AWS directly without saving it in SF.

Please do let me know what/where I am doing wrong and provide any helpful links.

Thanks in advance!!