If I understand it correctly, you're trying to parse HTTP response into n fields, right?
There are two viable approaches:
Use Reformat and CTL function split() on the content field or;
Connect FlatFileReader component to the HTTPConnector, set File URL = port:$0.content:discrete and appropriate metadata on the edge behind FlatFileReader in case you need to work with response as with records. Metadata record in your case needs to have "," set as Field delimiter and EOF as record delimiter set to true.
To illustrate this case:
Hope it helps. If that's not what you're looking for, can you please post more specific example?
Pavel Švec | CloverETL | Sales Engineer | 2111 Wilson Blvd | Suite 320 | Arlington, VA 22201