fix(vertex): error when an unknown path is requested

Author: andreynering

vertex/vertex.go

@@ -91,7 +91,8 @@ func vertexMiddleware(region, projectID string) sdkoption.Middleware {
 				body, _ = sjson.SetBytes(body, "anthropic_version", DefaultVersion)
 			}
 
-			if r.URL.Path == "/v1/messages" && r.Method == http.MethodPost {
+			switch {
+			case r.URL.Path == "/v1/messages" && r.Method == http.MethodPost:
 				if projectID == "" {
 					return nil, fmt.Errorf("no projectId was given and it could not be resolved from credentials")
 				}
@@ -107,14 +108,16 @@ func vertexMiddleware(region, projectID string) sdkoption.Middleware {
 				}
 
 				r.URL.Path = fmt.Sprintf("/v1/projects/%s/locations/%s/publishers/anthropic/models/%s:%s", projectID, region, model, specifier)
-			}
 
-			if r.URL.Path == "/v1/messages/count_tokens" && r.Method == http.MethodPost {
+			case r.URL.Path == "/v1/messages/count_tokens" && r.Method == http.MethodPost:
 				if projectID == "" {
 					return nil, fmt.Errorf("no projectId was given and it could not be resolved from credentials")
 				}
 
 				r.URL.Path = fmt.Sprintf("/v1/projects/%s/locations/%s/publishers/anthropic/models/count-tokens:rawPredict", projectID, region)
+
+			default:
+				return nil, fmt.Errorf("vertex middleware does not support %s %s", r.Method, r.URL.Path)
 			}
 
 			reader := bytes.NewReader(body)