"snake case your header names (yes this is bad form) before presenting them to your code as the list of header names." From RFC 2616, "Hypertext Transfer Proto

"snake case your header names (yes this is bad form) before presenting them to your code as the list of header names." From RFC 2616, "Hypertext Transfer Protocol -- HTTP/1.1", §4.2, "Message Headers": Each header field consists of a name followed by a colon (":") and the field value. Field names are case-insensitive. "Use content MD5 at both ends of the conversation." Yeah.. no: https://bugzilla.mozilla.org/show_bug.cgi?id=232030 https://bugzilla.mozilla.org/show_bug.cgi?id=232030