headersParse
Parses the headers of an HTTP request or response in @str and stores the results in @dest.
Beware that @dest may be modified even on failure.
This is a low-level method; normally you would use func@headers_parse_request or func@headers_parse_response.
Return
success or failure
Parameters
str
the header string (including the Request-Line or Status-Line, but not the trailing blank line)
len
length of @str
dest
#SoupMessageHeaders to store the header values in