52 lines
1.3 KiB
Rust
52 lines
1.3 KiB
Rust
use domain::base::message::Message;
|
|
use js_sys::{Math, Promise};
|
|
use std::ops::Add;
|
|
use wasm_bindgen::prelude::*;
|
|
use wasm_bindgen::JsValue;
|
|
use wasm_bindgen_futures::JsFuture;
|
|
use web_sys::Request;
|
|
|
|
#[wasm_bindgen]
|
|
extern "C" {
|
|
// This binds to the fetch function in global scope
|
|
// In cloudflare workers, there's no Window object
|
|
// and unfortunately the bionding in web_sys depends
|
|
// on Window being present.
|
|
fn fetch(req: &Request) -> Promise;
|
|
}
|
|
|
|
pub fn parse_dns_wireformat(msg: &[u8]) -> Result<Message<Vec<u8>>, String> {
|
|
Message::from_octets(msg.to_owned())
|
|
.map_err(|_| "Failed to parse DNS wireformat message".to_string())
|
|
}
|
|
|
|
// Rust wrapper around JS functions
|
|
// For convenience, and also to work around bugs in rust-analyzer
|
|
// which thinks all JS functions are "unsafe"
|
|
#[allow(unused_unsafe)]
|
|
pub async fn fetch_rs(req: &Request) -> Result<JsValue, JsValue> {
|
|
JsFuture::from(unsafe { fetch(req) }).await
|
|
}
|
|
|
|
#[allow(unused_unsafe)]
|
|
pub fn random() -> f64 {
|
|
unsafe { Math::random() }
|
|
}
|
|
|
|
pub fn random_range<T>(min: T, max: T) -> T
|
|
where
|
|
T: Ord + Into<f64> + FromFloat<f64> + Add<Output = T>,
|
|
{
|
|
min + T::from_float(random() * max.into())
|
|
}
|
|
|
|
pub trait FromFloat<F> {
|
|
fn from_float(f: F) -> Self;
|
|
}
|
|
|
|
impl FromFloat<f64> for u16 {
|
|
fn from_float(f: f64) -> u16 {
|
|
f as u16
|
|
}
|
|
}
|