The previous implementation allowed a trivial DoS attack in which the
client need simply maintain open connections with incomplete handshakes.
This commit resolves that by allowing a server worker to progress as
soon as a TCP connection has been established. This comes at the expense
of a more complex implementation necessitated by deficiencies in Hyper.
Potentially resolves#2118.
Previously, the heartbeat message, in its raw form, was ":\n\n". This
commit changes the message to be ":\n".
The former message, when parsed as Server-Sent Events, contained an
empty comment (as desired) _and_ a new line (erroneously). The new line
resulted in emitting any event that was presently being emitted, even if
it wasn't complete. That is, emitting an event partly, such as the
event's data but not its name. Removing the extra new line resolves this
issue and ensures that events aren't interrupted by the heartbeat.
Fixes#2152.
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.
In cc98f98, logging was changed to use a new 'write_out!' macro that
internally used 'write!' instead of 'print!' to log. This had an
unfortunate side-effect: 'libtest' via 'cargo test' no longer captures
the log output of tests.
The reason this occurs is due to the way that Cargo, or rather
`libtest`, captures log output: it uses hidden, unstable functions that
replace a special sink that `print!`, and _only_ `print!` writes to.
Using `write!` directly, as the commit does, bypasses this sink, and so
`cargo` never captures the output.
As a compromise, we only use the better implementation when we're not
compiled with `debug_assertions` or running tests, so at least tests run
in debug-mode won't spew output.
Also updates 'tokio-rustls' to a compatible version.
Additionally depends on 'rustls-pemfile' which includes functionality
that was previously part of 'rustls' itself.
