xmpp-rs normally has the stance to get buggy implementations fixed
rather than dropping checks. In this particular case I think this is not
a good use of resources:
- The disco#info feature var conveys no actual information:
If an implementation replies properly to a disco#info query, it is
already implied that it supports the protocol.
- There are broken server implementations out there.
A lot of them (all recent (>= 0.10 && < 0.13 AFAICT) Prosody IM
instances). At this point in time, xmpp-rs is unable to query
disco#info from MUCs hosted on such prosody versions, except by
workarounds (such as the one removed in this diff).
- XEP-0030 now features a note which reads:
> Note: Some entities are known not to advertise the
> `http://jabber.org/protocol/disco#info` feature within their
> responses, contrary to this specification. Entities receiving
> otherwise valid responses which do not include this feature SHOULD
> infer the support.
The case would be different if there were no (deployed) implementations
which had this bug or if the bug actually had an effect on clients.
Especially the latter is not the case though, as pointed out above.
Hence, I conclude that this check is overly pedantic and the resources
(time, emotional energy of dealing with bugs, punching patches through
to stable distributions, etc. etc.) spent on getting this fixed would
be better invested elsewhere.
In addition, the workaround is extremely ugly and, even in the xmpp-rs
implementation, has no test coverage. Without test coverage of such an
implementation, it is bound to break in funny ways when xmpp-rs changes
the strings of its error messages (which is something one might do even
outside a breaking release).
XEP-0068 is rather explicit that `FORM_TYPE` fields which are not
`type='hidden'` MUST be ignored (in most cases, see comments inside
the code for exceptions). The previous implementation returned an error
instead (and aborted parsing with that), which is obviously not
"ignoring".
[RFC 2426][1] says:
> The binary data MUST be encoded using the "B" encoding format.
> Long lines of encoded binary data SHOULD BE folded to 75 characters
> using the folding method defined in [MIME-DIR].
That implies that whitespace may occur in binval data and we thus must
be able to parse this correctly.
[1]: https://datatracker.ietf.org/doc/html/rfc2426#section-2.4.1
Other additional checks are already gated by the absence of this
feature. As the MR to remove these checks altogether is still blocked,
this should serve as at least as an intermediate solution to anyone
affected by buggy remote implementations.
This moves InnerJid into Jid and reformulates BareJid and FullJid in
terms of Jid.
Doing this has the key advantage that FullJid and BareJid can deref to
and borrow as Jid. This, in turn, has the advantage that they can be
used much more flexibly in HashMaps. However, this is (as we say in
Germany) future music; this commit only does the internal reworking.
Oh and also, it saves 20% memory on Jid objects.
Fixes#122 more thoroughly, or rather the original intent behind it.
This allows constructs like:
```rust
let residual = match Iq::try_from(stanza) {
Ok(iq) => return handle_iq(..),
Err(Error::TypeMismatch(_, _, v)) => v,
Err(other) => return handle_parse_error(..),
};
let residual = match Message::try_from(stanza) {
..
};
let residual = ..
log::warn!("unhandled object: {:?}", residual);
```
The interesting part of this is that this could be used in a loop over a
Vec<Box<dyn FnMut(Element) -> ControlFlow<SomeResult, Element>>, i.e. in
a parsing loop for a generic XML/XMPP stream.
The advantage is that the stanza.is() check runs only once (in
check_self!) and doesn't need to be duplicated outside, and it reduces
the use of magic strings.
Since Rust 1.76, and some much older nightly, there have been
improvements to the niche computation, which leads to smaller types
which can encode the same amount of data, variants, and such.
This fixes the tests on this compiler version.
That one accepts both uppercase and lowercase hexadecimal input, and
outputs in lowercase.
It requires no separator between bytes, unlike ColonSeparatedHex.
hickory-resolver’s MSRV is 1.67, those super old toolchain versions
wouldn’t build a recent version of tokio-xmpp anyway.
This effectively reverts 52a2d962ee.
