The Data Retrieval API is written in C, so it may be natural for users to develop C applications against this API. However, the Platform features a utility named awsp_cat. This utility reads CIDs from stdin and writes the raw content to stdout. Users may develop applications in arbitrary programming languages to process the awsp_cat output.
Perl developers would be able to wrap this into their existing codebase in no time, assuming they want to pay the fees.