3528273 - How to use API API_CV_ATTACHMENT_SRV to download attachment from supplier invoice

This knowledge article introduces how to use API API_CV_ATTACHMENT_SRV to download attachment from supplier invoice.

SAP S/4HANA Cloud Public Edition

1. Call GET method with operation GetAllOriginals to retrieve the metadata of the attachment associated with the supplier invoice object.
   For supplier invoice, use BusinessObjectTypeName = 'BUS2081' and LinkedSAPObjectKey = '<invoice number><fiscal year>'.
   
   Sample request URL:
   GET <host>/sap/opu/odata/sap/API_CV_ATTACHMENT_SRV/GetAllOriginals?BusinessObjectTypeName='BUS2081'&LinkedSAPObjectKey='51056040192024'
   
   The following properties can be found in response body:
   <d:DocumentInfoRecordDocType>SI1</d:DocumentInfoRecordDocType>
   <d:DocumentInfoRecordDocNumber>10000000617</d:DocumentInfoRecordDocNumber>
   <d:DocumentInfoRecordDocVersion>00</d:DocumentInfoRecordDocVersion>
   <d:DocumentInfoRecordDocPart>000</d:DocumentInfoRecordDocPart>
   <d:LogicalDocument>AD450F13BF3C1EDFA2C0C51DC7A086B2</d:LogicalDocument>
   <d:ArchiveDocumentID>AD450F13BF3C1EDFA2C0C51DC7A0C6B2</d:ArchiveDocumentID>
   <d:LinkedSAPObjectKey>51056040192024</d:LinkedSAPObjectKey>
   <d:BusinessObjectTypeName>RBKP</d:BusinessObjectTypeName>
   
   
2. Use the properties retrieved from step 1 to call GET method with entity AttachmentContentSet to download the attachment content.
   
   Sample request URL:
   GET <host>/sap/opu/odata/sap/API_CV_ATTACHMENT_SRV/AttachmentContentSet(DocumentInfoRecordDocType='SI1',DocumentInfoRecordDocNumber='10000000617',DocumentInfoRecordDocPart='000',DocumentInfoRecordDocVersion='00',LogicalDocument='AD450F13BF3C1EDFA2C0C51DC7A086B2',ArchiveDocumentID='AD450F13BF3C1EDFA2C0C51DC7A0C6B2',LinkedSAPObjectKey='51056040192024',BusinessObjectTypeName='RBKP')/$value

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