Source code
Revision control
Copy as Markdown
Other Tools
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use crate::{info, settings::validate_request, trace};
use ffi::FfiBackend;
use once_cell::sync::OnceCell;
mod ffi;
pub fn note_backend(which: &str) {
// If trace logs are enabled: log on every request. Otherwise, just log on
// the first request at `info` level. We remember if the Once was triggered
// to avoid logging twice in the first case.
static NOTE_BACKEND_ONCE: std::sync::Once = std::sync::Once::new();
let mut called = false;
NOTE_BACKEND_ONCE.call_once(|| {
info!("Using HTTP backend {}", which);
called = true;
});
if !called {
trace!("Using HTTP backend {}", which);
}
}
pub trait Backend: Send + Sync + 'static {
fn send(&self, request: crate::Request) -> Result<crate::Response, crate::ViaductError>;
}
static BACKEND: OnceCell<&'static dyn Backend> = OnceCell::new();
pub fn set_backend(b: &'static dyn Backend) -> Result<(), crate::ViaductError> {
BACKEND
.set(b)
.map_err(|_| crate::error::ViaductError::SetBackendError)
}
pub(crate) fn get_backend() -> &'static dyn Backend {
*BACKEND.get_or_init(|| Box::leak(Box::new(FfiBackend)))
}
pub fn send(request: crate::Request) -> Result<crate::Response, crate::ViaductError> {
validate_request(&request)?;
get_backend().send(request)
}