Hi, a version of this PR has been merged in #500, commits be327a7, b17e9aa & b29cffb.

@diefesson I hope you don't mind, I maintained your authorship on the commits even though I changed them slightly based on review comments and split the redirects & chunk handling into two separate commits for clarity of change.

• replace <str>.decode() with str(<str>, "utf-8") as not all ports have the decode functione enabled.
• squash the chunked_data function into an inline check - while the function is arguably clearer to read it results in slightly larger bytecode, so the inline version saves flash/ram.