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Gaurav Chauhan 16Gaurav Chauhan 16 

Content type of blob data coming from external system

Is there any way to figure out the Content type of original document coming from the external system as blob data?
Raj VakatiRaj Vakati
Try to use EncodingUtil  class base64Decode(inputString) method 
  
EncodingUtil.base64Encode(Blob.valueOf(ebiInvoiceInterfaceTestString));



https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_restful_encodingUtil.htm