Add the HTTP/1.1 `If-None-Match` header field makes the request method conditional
on a recipient cache or origin server either not having any current
representation of the target resource, when the field-value is "*",
or having a selected representation with an entity-tag that does not
match any of those listed in the field-value.
Closes#238
`Cookie` is the actual name of the header and since all other header structs
use the exact camel-cased version of their name using a different name here
is very inconvienient and confusing. You will encounter weird errors if you
try to use `Cookie` as the header. For this reason rename `Cookies` as
discussed on IRC with @seanmonstar and @reem and use `CookiePair` for real
cookies.
BREAKING CHANGE: Change header `Cookie` to `Cookie`
Add the HTTP/1.0 `Pragma` header field used to prevent older Caches, that
do not understand the `Cache-Control` header field from caching the ressource.
Closes#237
It is no longer required, as we can use `<H as Header>::header_name()`.
BREAKING CHANGE: Implementations of Header will need to adjust the
header_name method. It no longer takes any arguments.
Currently headers are exported at many places. For example you can access
`Transfer-Encoding` header at `header`, `header::common` and
`header::common::transfer_encoding`. Per discussion on IRC with
@seanmonstar and @reem, all contents of headers will be exposed at `header`
directly. Parsing utilities will be exposed at `header::parsing`. Header
macros can now be used from other crates.
This breaks much code using headers. It should use everything it needs
directly from `header::`, encodings are exposed at `header::Encoding::`,
connection options are exposed at `header::ConnectionOption`.
- Some stray deriving -> derive changes
- use::{mod} -> use::{self}
- fmt.write -> fmt.write_str
This does not catch the last case of fmt.write_str in the
Show impl of a Header Item. This will need to be changed
separately.
An Authorization header contains a Scheme. If you have no real scheme,
you can use String as your scheme (Authorization<String>).
This includes the `Basic` scheme built-in.
