- Includes ergonomic traits like IntoUrl and IntoBody, allowing easy
usage.
- Client can have a RedirectPolicy.
- Client can have a SslVerifier.
Updated benchmarks for client. (Disabled rust-http client bench since it
hangs.)
Previously, iter() returned (&str, HeaderView), which wasn't too useful
other than to write out to a stream. Checking for a certain header is
painful since header names are case-insensitive, but &str isn't. And
once found, you still couldn't do anything with a HeaderView other
format it.
Now, iter() returns a HeaderView, with methods is(), name(), and
value(). You can do `view.is::<ContentType>()` to check what header it
is. And you get the typed value out by calling
`view.value::<ContentType>()`, which will return an
`Option<ContentType>`, similar to `headers.get()`.
Headers also now implement Extend and FromIterator, so it's easier to
build new Headers objects by filtering out a few headers.
Because this changes .iter() to return HeaderView instead of a tuple,
this is a:
[breaking-change]
Header contains all of the trait-object unsafe methods
including the name of the header and parsing. HeaderFormat
contains fmt_header, which is the only trait-object safe
method.
Internal representation was changed from an enum back to a Struct again.
The raw representation *has* to stick around, even if parsed as a proper
typed header. The reason is that internally, hyper will access some
headers to know which parts of the http protocol to follow (such as if
the response has a length or is chunked). The raw value may still be
needed afterwards, such as for a DOM binding of
.getAllResponseHeaders().
Since the raw is kept around, the unsafety of get_raw is no longer true,
and so that is removed.
It's still more ergonomic to access the types, and safer as well, so
that is recommended when possible.
If two threads attempted to `get_ref` the same Header under two
representations, then it was possible that the second thread would
overwrite the work of the first thread, causing the first thread
to do an unchecked downcast to the wrong type.
In the case where they were the same Header representation, then the
only damage would be that it would be parsed twice and would possibly
return a false negative in one thread.
The new code checks that it was not a queued lock and will not override
the work of another thread, but will accept it if the other thread parsed
the header as the same type. This also prevents duplicate parsing.
This removes the need to receive `&mut self` in `get_ref` and `get.`
Since the interior mutability of the RWLock is needed only once,
it is safe to change the lifetime of the pointer given by read locks
as by then all mutation has been done.
Since `set` still requires `&mut self` there is no way to use the interior
mutability of the RWLock to modify an existing `&`-reference. However,
the use of interior mutability in `get_ref` means that `get_raw` is now
actually an unsafe operation because the (now `*const`) pointer could be
invalidated by a subsequent call to `get_ref.`
Fixes#47
This disallows reparsing, but since that can be a significant source
of errors I think this is actually beneficial.
This also refactors to avoid storing the TypeId, though that is less
of a gain.
