Manipulation of incoming request data ( Multipart request ) using policy.

[iamakashk]

Hi team,

I m working on creation of custom policy issue .
So in the policy i have to get the details of multipart data , which consist of a json data and an Image file ( single or multiple).

I need to modify the incoming json for some key ( example : like attaching log id to json data ) .

To achieve this i have tried to add the chunk data to a byte array.

                     @Override
			public void write(IApimanBuffer chunk) {
		
				String requestType = request.getType();
				String contentType = request.getHeaders().get(CommonConstants.CONTENT_TYPE);

				if(requestType.equals(CommonConstants.POST_METHOD)) {
					byte[] bytes = chunk.getBytes();
					readBuffer.append(bytes);
				}else {
					super.write(chunk);
				}
			}

and in "end" Method i am fetching the readBuffer and able to get json data .
Now the problem is I unable to put all the read buffer data all together and send it back to backend .

So is there anyway to read the chunk data from apiman , and modify it without disturbing the multipart format.

[msavy]

Have you checked out the TransformationPolicy plugin as an example that might be helpful to you?

[msavy]

Did you resolve this @iamakashk ?

[iamakashk]

@msavy Could not able to do this. Still working on it. Basically able to manipulate json but file is somehow not getting forwarded corrected when I combine everything again. Will update you on this.