pub fn parse_header_string(input: &str) -> Result<HashMap<String, String>>Expand description
Parse a comma-separated header string into a HashMap.
Format: Key:Value,Key2:Value2
Known limitation: Header values containing commas will be incorrectly
split. Cookie headers with semicolons work fine, but Cookie values with
commas (e.g. expires=Thu, 01 Jan 2099) will break.