Move access method testing logic to `mullvad-daemon`

Move access method testing logic to `mullvad-daemon`, which means that
the implementation details of how the test works is opaque to whatever
frontend which wants to issue a test of some (configured) access method.

1 files changed, 20 insertions, 0 deletions

diff --git a/mullvad-api/src/lib.rs b/mullvad-api/src/lib.rs
index c0024b22ee..5427f51aad 100644
--- a/mullvad-api/src/lib.rs
+++ b/mullvad-api/src/lib.rs
@@ -620,4 +620,24 @@ impl ApiProxy {
         let response = self.handle.service.request(request).await?;
         response.deserialize().await
     }
+
+    /// Check the availablility of `{APP_URL_PREFIX}/api-addrs`.
+    pub async fn api_addrs_available(&self) -> Result<(), rest::Error> {
+        let service = self.handle.service.clone();
+
+        rest::send_request(
+            &self.handle.factory,
+            service,
+            &format!("{APP_URL_PREFIX}/api-addrs"),
+            Method::HEAD,
+            None,
+            &[StatusCode::OK],
+        )
+        .await?;
+
+        // NOTE: A HEAD request should *not* have a body:
+        // https://developer.mozilla.org/en-US/docs/web/http/methods/head
+        // I.e., no need to deserialize the result.
+        Ok(())
+    }
 }