Add only_authenticated option to the client

When sending an upload request, we use HTTP formdata requests, which can't be cloned (seanmonstar/reqwest#2416, plus a limitation that formdata bodies are always internally streaming), but also know that we need to always have credentials.

The authentication middleware by default tries to clone the request and send an authenticated request first. By introducing an `only_authenticated` setting, we can skip this behaviour for publishing.

Split out from #7475

crates/uv-auth/src/middleware.rs

@@ -8,7 +8,7 @@ use crate::{
     realm::Realm,
     CredentialsCache, KeyringProvider, CREDENTIALS_CACHE,
 };
-use anyhow::anyhow;
+use anyhow::{anyhow, format_err};
 use netrc::Netrc;
 use reqwest::{Request, Response};
 use reqwest_middleware::{Error, Middleware, Next};
@@ -22,6 +22,9 @@ pub struct AuthMiddleware {
     netrc: Option<Netrc>,
     keyring: Option<KeyringProvider>,
     cache: Option<CredentialsCache>,
+    /// We know that the endpoint needs authentication, so we don't try to send an unauthenticated
+    /// request, avoiding cloning an uncloneable request.
+    only_authenticated: bool,
 }
 
 impl AuthMiddleware {
@@ -30,6 +33,7 @@ impl AuthMiddleware {
             netrc: Netrc::new().ok(),
             keyring: None,
             cache: None,
+            only_authenticated: false,
         }
     }
 
@@ -56,6 +60,14 @@ impl AuthMiddleware {
         self
     }
 
+    /// We know that the endpoint needs authentication, so we don't try to send an unauthenticated
+    /// request, avoiding cloning an uncloneable request.
+    #[must_use]
+    pub fn with_only_authenticated(mut self, only_authenticated: bool) -> Self {
+        self.only_authenticated = only_authenticated;
+        self
+    }
+
     /// Get the configured authentication store.
     ///
     /// If not set, the global store is used.
@@ -198,32 +210,42 @@ impl Middleware for AuthMiddleware {
             .as_ref()
             .is_some_and(|credentials| credentials.username().is_some());
 
-        // Otherwise, attempt an anonymous request
-        trace!("Attempting unauthenticated request for {url}");
-
-        // <https://github.com/TrueLayer/reqwest-middleware/blob/abdf1844c37092d323683c2396b7eefda1418d3c/reqwest-retry/src/middleware.rs#L141-L149>
-        // Clone the request so we can retry it on authentication failure
-        let mut retry_request = request.try_clone().ok_or_else(|| {
-            Error::Middleware(anyhow!(
-                "Request object is not cloneable. Are you passing a streaming body?".to_string()
-            ))
-        })?;
-
-        let response = next.clone().run(request, extensions).await?;
-
-        // If we don't fail with authorization related codes, return the response
-        if !matches!(
-            response.status(),
-            StatusCode::FORBIDDEN | StatusCode::NOT_FOUND | StatusCode::UNAUTHORIZED
-        ) {
-            return Ok(response);
-        }
+        let (mut retry_request, response) = if self.only_authenticated {
+            // For endpoints where we require the user to provide credentials, we don't try the
+            // unauthenticated request first.
+            trace!("Checking for credentials for {url}");
+            (request, None)
+        } else {
+            // Otherwise, attempt an anonymous request
+            trace!("Attempting unauthenticated request for {url}");
+
+            // <https://github.com/TrueLayer/reqwest-middleware/blob/abdf1844c37092d323683c2396b7eefda1418d3c/reqwest-retry/src/middleware.rs#L141-L149>
+            // Clone the request so we can retry it on authentication failure
+            let retry_request = request.try_clone().ok_or_else(|| {
+                Error::Middleware(anyhow!(
+                    "Request object is not cloneable. Are you passing a streaming body?"
+                        .to_string()
+                ))
+            })?;
+
+            let response = next.clone().run(request, extensions).await?;
+
+            // If we don't fail with authorization related codes, return the response
+            if !matches!(
+                response.status(),
+                StatusCode::FORBIDDEN | StatusCode::NOT_FOUND | StatusCode::UNAUTHORIZED
+            ) {
+                return Ok(response);
+            }
 
-        // Otherwise, search for credentials
-        trace!(
-            "Request for {url} failed with {}, checking for credentials",
-            response.status()
-        );
+            // Otherwise, search for credentials
+            trace!(
+                "Request for {url} failed with {}, checking for credentials",
+                response.status()
+            );
+
+            (retry_request, Some(response))
+        };
 
         // Check in the cache first
         let credentials = self.cache().get_realm(
@@ -265,7 +287,13 @@ impl Middleware for AuthMiddleware {
             }
         }
 
-        Ok(response)
+        if let Some(response) = response {
+            Ok(response)
+        } else {
+            Err(Error::Middleware(format_err!(
+                "Missing credentials for {url}"
+            )))
+        }
     }
 }
 

crates/uv-client/src/base_client.rs

@@ -36,6 +36,7 @@ pub struct BaseClientBuilder<'a> {
     client: Option<Client>,
     markers: Option<&'a MarkerEnvironment>,
     platform: Option<&'a Platform>,
+    only_authenticated: bool,
 }
 
 impl Default for BaseClientBuilder<'_> {
@@ -55,6 +56,7 @@ impl BaseClientBuilder<'_> {
             client: None,
             markers: None,
             platform: None,
+            only_authenticated: false,
         }
     }
 }
@@ -108,6 +110,12 @@ impl<'a> BaseClientBuilder<'a> {
         self
     }
 
+    #[must_use]
+    pub fn only_authenticated(mut self, only_authenticated: bool) -> Self {
+        self.only_authenticated = only_authenticated;
+        self
+    }
+
     pub fn is_offline(&self) -> bool {
         matches!(self.connectivity, Connectivity::Offline)
     }
@@ -230,20 +238,26 @@ impl<'a> BaseClientBuilder<'a> {
     fn apply_middleware(&self, client: Client) -> ClientWithMiddleware {
         match self.connectivity {
             Connectivity::Online => {
-                let client = reqwest_middleware::ClientBuilder::new(client);
-
-                // Initialize the retry strategy.
-                let retry_policy =
-                    ExponentialBackoff::builder().build_with_max_retries(self.retries);
-                let retry_strategy = RetryTransientMiddleware::new_with_policy_and_strategy(
-                    retry_policy,
-                    UvRetryableStrategy,
-                );
-                let client = client.with(retry_strategy);
+                let mut client = reqwest_middleware::ClientBuilder::new(client);
+
+                // Avoid non-cloneable errors with a streaming body during publish.
+                if self.retries > 0 {
+                    // Initialize the retry strategy.
+                    let retry_policy =
+                        ExponentialBackoff::builder().build_with_max_retries(self.retries);
+                    let retry_strategy = RetryTransientMiddleware::new_with_policy_and_strategy(
+                        retry_policy,
+                        UvRetryableStrategy,
+                    );
+                    client = client.with(retry_strategy);
+                }
 
                 // Initialize the authentication middleware to set headers.
-                let client =
-                    client.with(AuthMiddleware::new().with_keyring(self.keyring.to_provider()));
+                client = client.with(
+                    AuthMiddleware::new()
+                        .with_keyring(self.keyring.to_provider())
+                        .with_only_authenticated(self.only_authenticated),
+                );
 
                 client.build()
             }