.reader() + .writer() on ReadWrite

[brandonros]

attempts #247

[brandonros]

i'm 99% sure we don't want to lose this, but it conflicts with existing implementations... not sure how to fix/if this is a code smell?

[brandonros]

fails with

MacBook-Air:tiny-http brandon 2023-11-11 14:20:04 $ cargo build
   Compiling tiny_http v0.12.0 (/Users/brandon/Desktop/redacted_gui/tiny-http)
error[E0277]: `R` cannot be sent between threads safely
  --> src/util/custom_stream.rs:27:9
   |
27 |         Box::new(self.reader)
   |         ^^^^^^^^^^^^^^^^^^^^^ `R` cannot be sent between threads safely
   |
   = note: required for the cast from `Box<R>` to `Box<(dyn std::io::Read + Send + 'static)>`
help: consider further restricting this bound
   |
23 |     R: Read + std::marker::Send,
   |             +++++++++++++++++++

error[E0277]: `W` cannot be sent between threads safely
  --> src/util/custom_stream.rs:31:9
   |
31 |         Box::new(self.writer)
   |         ^^^^^^^^^^^^^^^^^^^^^ `W` cannot be sent between threads safely
   |
   = note: required for the cast from `Box<W>` to `Box<(dyn std::io::Write + Send + 'static)>`
help: consider further restricting this bound
   |
24 |     W: Write + std::marker::Send,
   |              +++++++++++++++++++

For more information about this error, try `rustc --explain E0277`.
error: could not compile `tiny_http` (lib) due to 2 previous errors

[brandonros]

flawed design, most likely the only option is to use an event loop like mio or something (and you really shouldn't subject yourself to the pain of trying to do non-async for no good reason)