Prior to this commit, the `FromForm` derive could pair the incorrect
field name with a failing validation. The bug was caused by using two
mismatched iterators in a `quote!()` invocation. Specifically, the first
iterator emitted validation calls for all fields that had validation
applied, while the second emitted field names for all fields,
irrespective of whether the field had any validation applied. The two
iterators were effectively zipped to create the final error, creating
the bug.
This commit fixes the issue by correctly matching field names with their
validators at the expense of an additional allocation, necessitated by
the `quote` crate's inability to access subfields in a repetition.
Fixes#2394.
Due to tokio-rs/tokio#4780, a panicking top-level future combined with
an uncooperative background task prevents runtime shutdown. To avoid
this in the case of `Rocket::launch()` returning an `Error`, which
panics on drop if it isn't inspected, we return the `Result` to the
caller (i.e., `main`) instead of the `block_on` future. This prevent the
panic from occuring inside of the `block_on` future and so the runtime
terminates even with uncooperative I/O.
The core improvement is that `Rocket::launch()` now resolves to
`Ok(Rocket<Ignite>)` on nominal shutdown. Furthermore, shutdown never
terminates the running process.
Other changes directly related to shutdown:
* Runtime worker thread names are now irrelevant to graceful shutdown.
* `ErrorKind::Runtime` was removed; `ErrorKind::Shutdown` was added.
* The `force` config value is only read from the default provider.
* If `force`, Rocket's constructed async runtime is terminated.
Other related changes:
* The exported `hyper` module docs properly reflect public re-exports.
Prior to this commit, 'Vec', 'HashMap', and 'BTreeMap' would parse
leniently irrespetive of the requested parsing strategy. This commit
changes their behavior so that the parsing strategy is respected.
Resolves#2131.
This commit implements a workaround for an [issue within rustc]. The
problem showed itself when using e.g. a `Vec<&str>` argument in an async
route handler (but not `&str`), which resulted in a "implementation of
`FromForm` is not general enough" error. The workaround itself works by
gathering all invocations of `FromForm`'s methods inside a block without
any `.await` points [ref].
[issue within rustc]: https://github.com/rust-lang/rust/issues/69663
[ref]: https://github.com/rust-lang/rust/issues/57478#issuecomment-501186084
As 'FromForm' doesn't provide access to the raw, undecoded string,
'MsgPack' cannot implement 'FromForm::from_value()'. This means that it
is not presently possible to parse a MessagePack form from a query
string. As such, the 'UriDisplay<Query>' implementation was removed.
The 'UriDisplay<Query>' for JSON was fixed such that a round-trip of a
'Json<T>' as a form works as expected.
The 'FromFrom' derive now allows type generics in all positions using
the same automatic discovery technique as with 'Responder'. (In fact,
the technique was created for this derive.) Furthermore, 'FromForm' can
now be derived for unit structs.
Also adds a new 'try_with' form field validator.
Resolves#1695.
This commit presents and applies a new technique for bounding type
generics in derives. In short, for a generic `T` used in a field type of
`Field<T>`, where an eventual bound of `Responder` required, the derive
generates a bound of `Field<T>: Responder`. This removes the need for
any manually provided bounds while simultaneously allowing more
structures to typecheck. For example, generics in header components are
now fully supported.
The syntax 'TypedStream![T + '_]' expands to:
impl TypedStream<Item = T> + '_
This allows seamlessly borrowing in typed streams.
Also adds 'Event::empty()', for convenience.
Previously, recursion into rewriting 'self' in field validations would
cease after the first function call. This meant that internal uses of
'self' were not properly rewritten. This commit ameliorates the
situation.
