http::basic_parser::on_chunk_header

Called each time a new chunk header of a chunk encoded body is received.

void
on_chunk_header_impl(
    std::uint64_t size,
    string_view extensions,
    error_code& ec);

This function is invoked each time a new chunk header is received. The function is only used when the chunked transfer encoding is present.

Name	Description
`size`	The size of this chunk, in bytes.
`extensions`	A string containing the entire chunk extensions. This may be empty, indicating no extensions are present.
`ec`	An output parameter which the function may set to indicate an error. The error will be clear before this function is invoked.