fix(relay): wrong URL for claude model in GCP Vertex AI

relay/channel/vertex/adaptor.go

@@ -90,7 +90,43 @@ func (a *Adaptor) getRequestUrl(info *relaycommon.RelayInfo, modelName, suffix s
 		}
 		a.AccountCredentials = *adc
 
-		if a.RequestMode == RequestModeLlama {
+		if a.RequestMode == RequestModeGemini {
+			if region == "global" {
+				return fmt.Sprintf(
+					"https://aiplatform.googleapis.com/v1/projects/%s/locations/global/publishers/google/models/%s:%s",
+					adc.ProjectID,
+					modelName,
+					suffix,
+				), nil
+			} else {
+				return fmt.Sprintf(
+					"https://%s-aiplatform.googleapis.com/v1/projects/%s/locations/%s/publishers/google/models/%s:%s",
+					region,
+					adc.ProjectID,
+					region,
+					modelName,
+					suffix,
+				), nil
+			}
+		} else if a.RequestMode == RequestModeClaude {
+			if region == "global" {
+				return fmt.Sprintf(
+					"https://aiplatform.googleapis.com/v1/projects/%s/locations/global/publishers/anthropic/models/%s:%s",
+					adc.ProjectID,
+					modelName,
+					suffix,
+				), nil
+			} else {
+				return fmt.Sprintf(
+					"https://%s-aiplatform.googleapis.com/v1/projects/%s/locations/%s/publishers/anthropic/models/%s:%s",
+					region,
+					adc.ProjectID,
+					region,
+					modelName,
+					suffix,
+				), nil
+			}
+		} else if a.RequestMode == RequestModeLlama {
 			return fmt.Sprintf(
 				"https://%s-aiplatform.googleapis.com/v1beta1/projects/%s/locations/%s/endpoints/openapi/chat/completions",
 				region,
@@ -98,24 +134,6 @@ func (a *Adaptor) getRequestUrl(info *relaycommon.RelayInfo, modelName, suffix s
 				region,
 			), nil
 		}
-
-		if region == "global" {
-			return fmt.Sprintf(
-				"https://aiplatform.googleapis.com/v1/projects/%s/locations/global/publishers/google/models/%s:%s",
-				adc.ProjectID,
-				modelName,
-				suffix,
-			), nil
-		} else {
-			return fmt.Sprintf(
-				"https://%s-aiplatform.googleapis.com/v1/projects/%s/locations/%s/publishers/google/models/%s:%s",
-				region,
-				adc.ProjectID,
-				region,
-				modelName,
-				suffix,
-			), nil
-		}
 	} else {
 		if region == "global" {
 			return fmt.Sprintf(
@@ -134,6 +152,7 @@ func (a *Adaptor) getRequestUrl(info *relaycommon.RelayInfo, modelName, suffix s
 			), nil
 		}
 	}
+	return "", errors.New("unsupported request mode")
 }
 
 func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
@@ -187,7 +206,7 @@ func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Header, info *rel
 		}
 		req.Set("Authorization", "Bearer "+accessToken)
 	}
-  if a.AccountCredentials.ProjectID != "" {
+	if a.AccountCredentials.ProjectID != "" {
 		req.Set("x-goog-user-project", a.AccountCredentials.ProjectID)
 	}
 	return nil