feat: add resource request struct to backends (#1718)

backends/src/headers.rs

@@ -33,6 +33,39 @@ impl Header for XShuttleAdminSecret {
     }
 }
 
+pub static X_SHUTTLE_PROJECT_SECRET: HeaderName =
+    HeaderName::from_static("x-shuttle-project-secret");
+
+/// Typed header for sending admin secrets to Shuttle components
+pub struct XShuttleProjectSecret(pub String);
+
+impl Header for XShuttleProjectSecret {
+    fn name() -> &'static HeaderName {
+        &X_SHUTTLE_PROJECT_SECRET
+    }
+
+    fn decode<'i, I>(values: &mut I) -> Result<Self, headers::Error>
+    where
+        Self: Sized,
+        I: Iterator<Item = &'i http::HeaderValue>,
+    {
+        let value = values
+            .next()
+            .ok_or_else(headers::Error::invalid)?
+            .to_str()
+            .map_err(|_| headers::Error::invalid())?
+            .to_string();
+
+        Ok(Self(value))
+    }
+
+    fn encode<E: Extend<http::HeaderValue>>(&self, values: &mut E) {
+        if let Ok(value) = HeaderValue::from_str(&self.0) {
+            values.extend(std::iter::once(value));
+        }
+    }
+}
+
 /// Used by deployers <=0.38.0. Can be removed when those are no longer supported
 pub static X_SHUTTLE_PROJECT: HeaderName = HeaderName::from_static("x-shuttle-project");
 

backends/src/lib.rs

@@ -13,6 +13,7 @@ pub mod headers;
 pub mod metrics;
 mod otlp_tracing_bridge;
 pub mod project_name;
+pub mod resource;
 pub mod trace;
 
 #[cfg(any(test, feature = "test-utils"))]

backends/src/resource.rs

@@ -0,0 +1,4 @@
+#[derive(serde::Serialize, serde::Deserialize)]
+pub struct ResourceRequest {
+    pub resources: Vec<Vec<u8>>,
+}