Not able to perform Blob Batch with REST API through Salesforce

@Tanishka Arora

Please share the full API request minus any confidential information and the full output and error. This way we can work to see what might be causing the error.

@AuraEnabled
public static void deleteMultipleBlobs(String batchVal){
getCustomMetadataValues();
List<accessTokenWrapper> minutesValue = accessToken();
Http h = new Http();
HttpRequest req= new HttpRequest();
String url = 'https://advance.blob.core.windows.net/?comp=batch';
String setDate = formatDateGMT(); //Tue, 31 Aug 2021 17:54:42 GMT
String boundary = 'batch_'+batchVal;
String delimiter = '\r\n--' + boundary + '\r\n';
String closeDelim = '\r\n--' + boundary + '--';
String body = delimiter+'Content-Type: application/http\r\nContent-Transfer-Encoding: binary\r\nContent-ID: 0\r\n\r\nDELETE /newcontainer02/testblob \r\nx-ms-date: '+setDate+'\r\nAuthorization: Bearer '+minutesValue[0].token+'\r\nContent-Length: 0\r\n'+closeDelim;
system.debug('body--->'+body);
req.setEndpoint(url);
req.setMethod('POST');
req.setHeader('Authorization', 'Bearer '+ minutesValue[0].token);
req.setHeader('x-ms-version', '2018-11-09');
req.setHeader('x-ms-date', setDate);
req.setHeader('Content-Length','221');
req.setHeader('Content-Type','multipart/mixed; boundary=batch_'+batchVal);
req.setbody(body);
HttpResponse res = h.send(req);
system.debug('response of delete Multiple blobs--->'+res.getStatusCode());
system.debug('getResponse body--->'+res.getBody());