Every HTTP request is made of one or more headers. Usually, WebCopy will take care of determining the correct set of headers to send. However, you can also define your own headers to include with requests.
If your expression includes any of the
> characters and you want them to processed as plain text, you need to "escape" the character by preceding it with a backslash. For example, if your expression was
application/epub+zip this would need to be written as
application/epub\+zip otherwise the
+ character would have a special meaning and no matches would be made. Similarly, if the expression was
example.com, this should be written as
. means "any character" which could lead to unexpected matches.