Playing a bit with Axum

axumtest/Cargo.lock

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+ "log",
+ "try-lock",
+]
+
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+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
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+dependencies = [
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
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axumtest/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "axumtest"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+axum = { version = "0.5.15", features = ["headers"] }
+tokio = { version = "1.20.1", features = ["macros", "rt-multi-thread"] }

axumtest/src/header/ciusr.rs

@@ -0,0 +1,39 @@
+//! Header parsing for X-CIUSR
+
+use axum::headers::Header;
+use axum::headers::HeaderName;
+use axum::headers::HeaderValue;
+
+static NAME: HeaderName = HeaderName::from_static("x-ciusr");
+
+pub struct CiUsr(String);
+
+impl Header for CiUsr {
+    fn name() -> &'static HeaderName {
+        &NAME
+    }
+
+    fn decode<'i, I>(values: &mut I) -> Result<Self, axum::headers::Error>
+    where
+        Self: Sized,
+        I: Iterator<Item = &'i axum::http::HeaderValue>,
+    {
+        let value = values.next().ok_or_else(axum::headers::Error::invalid)?;
+        Ok(CiUsr(
+            value
+                .to_str()
+                .or(Err(axum::headers::Error::invalid()))?
+                .into(),
+        ))
+    }
+
+    fn encode<E: Extend<axum::http::HeaderValue>>(&self, values: &mut E) {
+        values.extend(std::iter::once(HeaderValue::from_str(&self.0).unwrap()))
+    }
+}
+
+impl std::fmt::Display for CiUsr {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}

axumtest/src/header/mod.rs

@@ -0,0 +1 @@
+pub mod ciusr;

axumtest/src/main.rs

@@ -0,0 +1,19 @@
+mod header;
+
+use axum::routing::get;
+use axum::routing::Router;
+use axum::TypedHeader;
+use header::ciusr::CiUsr;
+
+#[tokio::main]
+async fn main() {
+    let app = Router::new().route("/", get(index));
+    axum::Server::bind(&"0.0.0.0:3000".parse().unwrap())
+        .serve(app.into_make_service())
+        .await
+        .unwrap();
+}
+
+async fn index(TypedHeader(usr): TypedHeader<CiUsr>) -> String {
+    format!("Hellow {}", usr)
+}