Upgrade to axum ^0.7

[lebenitza]

Are there any plans to migrate to axum v0.7.x ?

https://github.com/tokio-rs/axum/releases/tag/axum-v0.7.0

This comes with other dependencies that need to be upgraded too, mentioned in the 0.7.0 release. I tried figuring this out but I am stuck at

error[E0119]: conflicting implementations of trait `FromRequest<_, axum_core::extract::private::ViaParts>` for type `event::Event`
  --> src/binding/axum/extract.rs:16:1
   |
16 | / impl<S, B> FromRequest<S, B> for Event
17 | | where
18 | |     B: Body + Send + 'static,
19 | |     B::Data: Send,
20 | |     B::Error: Into<BoxError>,
21 | |     S: Send + Sync,
   | |___________________^
   |
   = note: conflicting implementation in crate `axum_core`:
           - impl<S, T> FromRequest<S, axum_core::extract::private::ViaParts> for T
             where S: Send, S: Sync, T: FromRequestParts<S>;
   = note: downstream crates may implement trait `axum::extract::FromRequestParts<_>` for type `event::Event`
   = note: upstream crates may add a new impl of trait `http_body::Body` for type `axum_core::extract::private::ViaParts` in future versions

For more information about this error, try `rustc --explain E0119`.
error: could not compile `cloudevents-sdk` (lib) due to 1 previous error

[Lazzaretti]

Hi @lebenitza ,
Sorry for the delay. I think it makes sense to update it. Would you like to contribute a PR? I'm happy to support you if you need help.

[ozabalaferrera]

I taking a quick look at what it would take to do this, and it seems that upgrading to http ^1.0 is unavoidable.
For example, I can't find a good way to create an http 1.1.0 response from an http 0.2.12 response to implement IntoResponse for Event.

Is that what you would expect, @Lazzaretti ?

[Lazzaretti]

I think you are right, the http crate has to be updated. If this is the case, I'm fine with an upgrade.

[ozabalaferrera]

Sounds good. I have some travel scheduled, but I can take this up in a few weeks if no one else has by then.

[devsprint]

@Lazzaretti when do you plan a new release ?

[ozabalaferrera]

I've been working on this on and off, but got stuck on implementing the axum(-core) FromRequest trait for Event. It complains (see below) about a conflict resulting from a generic implementation of FromRequest for types that implement FromRequestParts, but that FromRequestParts is not implemented for Event. I'll keep trying to figure it out, but any suggestions would be appreciated.

error[E0119]: conflicting implementations of trait `FromRequest<_, axum_core::extract::private::ViaParts>` for type `event::Event`
  --> src\binding\axum\extract.rs:17:1
   |
17 | / impl<S, B> FromRequest<S, B> for Event
18 | | where
19 | |     B: Body + Send + 'static,
20 | |     B::Data: Send,
21 | |     B::Error: Into<BoxError>,
22 | |     S: Send + Sync,
   | |___________________^
   |
   = note: conflicting implementation in crate `axum_core`:
           - impl<S, T> FromRequest<S, axum_core::extract::private::ViaParts> for T
             where S: Send, S: Sync, T: FromRequestParts<S>;
   = note: downstream crates may implement trait `axum::extract::FromRequestParts<_>` for type `event::Event`
   = note: upstream crates may add a new impl of trait `http_body::Body` for type `axum_core::extract::private::ViaParts` in future versions

[nicmr]

@ozabalaferrera Could this be the same issue as the one described in this SO response? https://stackoverflow.com/a/77816211
i.e. FromRequest signature has changed from FromRequest<S, B> to FromRequest<S>

Linking the references shared in the response directly:

• https://docs.rs/axum/latest/axum/extract/index.html#implementing-fromrequest
• https://github.com/tokio-rs/axum/blob/9e319490798f6a35b24f128fc8c00f4f312d0bdd/examples/validator/src/main.rs#L59-L73

[ozabalaferrera]

@nicmr, that was it, thanks!

[ozabalaferrera]

@Lazzaretti, I've not evaluated what is needed to update web (server) frameworks other than axum. The changes I've prepared use feature gates to control dependency versions and function signatures, such that only the axum feature is affected/updated. However, that breaks some feature combinations (see below). As a result, the test jobs would have to change to remove the use of --all-features. Are you satisfied with this approach, or should I hold off and try for a larger PR that updates as many of the frameworks as possible?

axum and (nats or rdkafka) are okay, these are not:

#[cfg(all(
    feature = "axum",
    any(
        feature = "http-binding",
        feature = "actix",
        feature = "reqwest",
        feature = "warp",
        feature = "poem"
    )
))]
compile_error!("feature `axum` cannot be used with features `http-binding`, `actix`, `reqwest`, `warp`, or `poem`");

I figured I'd ask before putting up the PR, but I'm happy to put up a draft if you'd like to take a look.

[Lazzaretti]

@Lazzaretti when do you plan a new release ?

I don't have a strict timeline. But I think we soon need a new release :)

[Lazzaretti]

@Lazzaretti, I've not evaluated what is needed to update web (server) frameworks other than axum. The changes I've prepared use feature gates to control dependency versions and function signatures, such that only the axum feature is affected/updated. However, that breaks some feature combinations (see below). As a result, the test jobs would have to change to remove the use of --all-features. Are you satisfied with this approach, or should I hold off and try for a larger PR that updates as many of the frameworks as possible?

axum and (nats or rdkafka) are okay, these are not:

#[cfg(all(
    feature = "axum",
    any(
        feature = "http-binding",
        feature = "actix",
        feature = "reqwest",
        feature = "warp",
        feature = "poem"
    )
))]
compile_error!("feature `axum` cannot be used with features `http-binding`, `actix`, `reqwest`, `warp`, or `poem`");

I figured I'd ask before putting up the PR, but I'm happy to put up a draft if you'd like to take a look.

@jcrossley3 any suggestion from your side?

@ozabalaferrera If you want to ping me on Slack and we can discuss this a bit in detail: https://cloud-native.slack.com/team/UTV7ZGPAR

[jcrossley3]

@jcrossley3 any suggestion from your side?

My inclination is to keep --all-features working, even if that requires updating the other frameworks to later (stable) versions. But I have no suggestions regarding the best way of doing that.

[ozabalaferrera]

@jcrossley3, understood. I already started working on another branch with broad dependency updates. warp might be troublesome because it is not on hyper and http versions 1. We'll see how it goes 😄

@Lazzaretti, I'll reach out on slack if I have any other questions.