[OLINGO-1041] Set Cache-Control Header for OData Response

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: V2 2.0.6
• Component/s: odata2-core
• Labels: ODataResponseBuilder cache-control header headers
• Environment: SAP HANA Cloud Platform
• Assignee: mibo
• Reporter: Alexander Parr
• Created: 04/Nov/16 06:10
• Updated: 18/Nov/16 17:41
• Resolved: 18/Nov/16 17:41

Description

Hi all,
I implemented method 'readEntityMedia' which is called via $value for an entity. As I do return a PDF file I like to set the response header 'Cache-Control' to a defined value which is 'max-age = 86400, public' in my case.

By default the 'Cache-Control' header is set to private. I tried to change the header by using method 'header' of the ODataResponseBuilder:

public ODataResponse readEntityMedia(GetMediaResourceUriInfo uriInfo, String contentType) throws ODataException {
...
ODataResponseBuilder responseBuilder = ODataResponse.fromResponse(EntityProvider.writeBinary(mimeTypeRequested, documentData));
				
responseBuilder
	.header("Cache-Control", "max-age = 86400, public")
	.header("Content-Disposition", "inline;filename=\"" + fileName + "\"");
				
return responseBuilder.build();

}

Unfortunately the response header now contains both:
Cache-Control:private
and
Cache-Control:max-age = 86400, public

which is not what I expected. By calling method 'header' of the ResponseBuilder I expect that if a header already exists it gets overwritten.

Best regards,
Alex