move bogus "unsafe" to utils

* These are needed to make rust-analyzer stop complaining

src/client.rs

@@ -6,7 +6,7 @@ use domain_core::bits::record::Record;
 use domain_core::bits::{ParsedDname, SectionBuilder};
 use domain_core::iana::Opcode;
 use domain_core::rdata::AllRecordData;
-use js_sys::{ArrayBuffer, Math, Uint8Array};
+use js_sys::{ArrayBuffer, Uint8Array};
 use wasm_bindgen_futures::JsFuture;
 use web_sys::{Headers, Request, RequestInit, Response};
 
@@ -51,7 +51,7 @@ impl Client {
 
     // Select an upstream randomly
     fn select_upstream(&self) -> String {
-        let idx = unsafe { Math::random() } * self.options.upstream_urls.len() as f64;
+        let idx = crate::util::random() * self.options.upstream_urls.len() as f64;
         self.options.upstream_urls[idx as usize].clone()
     }
 
@@ -62,7 +62,7 @@ impl Client {
         let mut builder = MessageBuilder::new_udp();
         // Set up the header
         let header = builder.header_mut();
-        header.set_id((unsafe { Math::random() } * u16::MAX as f64) as u16);
+        header.set_id((crate::util::random() * u16::MAX as f64) as u16);
         header.set_qr(false); // For queries, QR = false
         header.set_opcode(Opcode::Query);
         header.set_rd(true); // Ask for recursive queries
@@ -93,7 +93,7 @@ impl Client {
 
         let request = Request::new_with_str_and_init(upstream, &request_init)
             .map_err(|_| "Failed to create Request object".to_string())?;
-        let resp: Response = JsFuture::from(unsafe { crate::util::fetch(&request) })
+        let resp: Response = crate::util::fetch_rs(&request)
             .await
             .map_err(|_| "Upstream request error".to_string())?
             .into();

src/util.rs

@@ -1,7 +1,9 @@
 use bytes::Bytes;
 use domain_core::bits::message::Message;
-use js_sys::Promise;
+use js_sys::{Math, Promise};
+use wasm_bindgen::JsValue;
 use wasm_bindgen::prelude::*;
+use wasm_bindgen_futures::JsFuture;
 use web_sys::Request;
 
 #[wasm_bindgen]
@@ -10,10 +12,23 @@ extern "C" {
     // In cloudflare workers, there's no Window object
     // and unfortunately the bionding in web_sys depends
     // on Window being present.
-    pub fn fetch(req: &Request) -> Promise;
+    fn fetch(req: &Request) -> Promise;
 }
 
 pub fn parse_dns_wireformat(msg: &[u8]) -> Result<Message, String> {
     let bytes = Bytes::from(msg);
     Message::from_bytes(bytes).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() }
+}