tustvold commented on PR #7183:
URL: https://github.com/apache/arrow-rs/pull/7183#issuecomment-2677984588

   > Is it right to say that instead of reqwest, we now settle on
   
   I think we just depend on `http`, I don't believe we have a dependency on 
`hyper`
   
   > I wonder if we need the custom service type though or if we could use 
something like tower 
   
   I went back and forth on this, the reason for preferring a custom service 
was the following:
   
   * Hyper actually defines its own service and doesn't use tower (as tower 
isn't 1.0) - https://docs.rs/hyper/latest/hyper/service/trait.HttpService.html
   * We need a dyn-compatible trait, at which point the existing ecosystem 
traits become very cumbersome
   * Tower is exceptionally confusing, and the `&mut self` requirement is 
rather obnoxious
   * It allows adding Debug + Send + Sync requirements easily
   
   Ultimately defining a very simple async_trait in terms of `http` and custom 
body implementations, seemed simpler and unlikely to paint us into a corner


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