how can i reuse a database connection on service_fn closure? #1227

kulame · 2022-08-08T11:56:06Z

kulame
Aug 8, 2022

i have a example project .

https://github.com/kulame/http-proxy/blob/master/src/main.rs

i need to use database connection on the proxy function.

but there is a error message on it.

➜  http-proxy git:(master) cargo build
   Compiling example-http-proxy v0.1.0 (/srv/devvpn/http-proxy)
error[E0525]: expected a closure that implements the `FnMut` trait, but this closure only implements `FnOnce`
  --> src/main.rs:47:37
   |
47 |     let service = tower::service_fn(move |req: Request<Body>| {
   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^ this closure implements `FnOnce`, not `FnMut`
...
51 |                 proxy(req,conn).await
   |                           ---- closure is `FnOnce` because it moves the variable `conn` out of its environment
...
63 |         .serve(Shared::new(service))
   |          ----- the requirement to implement `FnMut` derives from here

For more information about this error, try `rustc --explain E0525`.
error: could not compile `example-http-proxy` due to previous error

how can i do for reuse the database connection on proxy func?

davidpdrsn · 2022-08-08T13:39:02Z

davidpdrsn
Aug 8, 2022
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Are you the same person that asked in discord? If so, did the advice work for you?

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how can i reuse a database connection on service_fn closure? #1227

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kulame Aug 8, 2022

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davidpdrsn Aug 8, 2022 Collaborator

kulame
Aug 8, 2022

davidpdrsn
Aug 8, 2022
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