Use web-sys instead of ureq to make requests.

koweb/Cargo.toml

@@ -22,8 +22,8 @@ console_log = { version = "1.0", features = ["color"] }
 error-chain = { version = "0.12.4", default-features = false }
 getrandom = { version = "0.2.3", features = ["js"] }
 log = "0.4.6"
-ureq = { version = "2.9", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde-wasm-bindgen = "0.4"
 wasm-bindgen = { version = "0.2", features = ["serde-serialize"] }
 wasm-bindgen-futures = "0.4.23"
+web-sys = { version = "0.3.4", features = ["Response", "Window"] }

koweb/src/fetch.rs

@@ -3,11 +3,31 @@ use error_chain::error_chain;
 error_chain! {
     foreign_links {
         Io(std::io::Error);
-        Ureq(ureq::Error);
     }
 }
 
-// TODO: remove async
 pub async fn fetch(url: &str) -> Result<String> {
-    Ok(ureq::get(url).call()?.into_string()?)
+    log::info!("Fetching {url} ...");
+    // TODO: handle errors
+    Ok(run(url).await.unwrap())
+}
+
+use wasm_bindgen::prelude::*;
+use wasm_bindgen::JsCast;
+use wasm_bindgen_futures::JsFuture;
+use web_sys::Response;
+
+// Adapted from: https://rustwasm.github.io/wasm-bindgen/examples/fetch.html
+pub async fn run(url: &str) -> core::result::Result<String, JsValue> {
+    let window = web_sys::window().unwrap();
+    let resp_value = JsFuture::from(window.fetch_with_str(&url)).await?;
+
+    // `resp_value` is a `Response` object.
+    assert!(resp_value.is_instance_of::<Response>());
+    let resp: Response = resp_value.dyn_into().unwrap();
+
+    // Convert this other `Promise` into a rust `Future`.
+    let json = JsFuture::from(resp.text()?).await?;
+
+    Ok(json.as_string().unwrap())
 }