diff --git a/make/photon/prepare/templates/chartserver/env.jinja b/make/photon/prepare/templates/chartserver/env.jinja
index 1fdf2cb24..d2a5fb9dd 100644
--- a/make/photon/prepare/templates/chartserver/env.jinja
+++ b/make/photon/prepare/templates/chartserver/env.jinja
@@ -28,7 +28,7 @@ DISABLE_METRICS=false
 DISABLE_API=false
 DISABLE_STATEFILES=false
 ALLOW_OVERWRITE=true
-CHART_URL=
+CHART_URL={{public_url}}/chartrepo
 AUTH_ANONYMOUS_GET=false
 TLS_CERT=
 TLS_KEY=
diff --git a/make/photon/prepare/utils/chart.py b/make/photon/prepare/utils/chart.py
index 5e76b8f3c..f0c07c469 100644
--- a/make/photon/prepare/utils/chart.py
+++ b/make/photon/prepare/utils/chart.py
@@ -12,6 +12,7 @@ chartm_env = os.path.join(config_dir, "chartserver", "env")
 def prepare_chartmuseum(config_dict):
 
     core_secret = config_dict['core_secret']
+    registry_custom_ca_bundle_path = config_dict['registry_custom_ca_bundle_path']
     redis_host = config_dict['redis_host']
     redis_port = config_dict['redis_port']
     redis_password = config_dict['redis_password']
@@ -96,6 +97,7 @@ def prepare_chartmuseum(config_dict):
     cache_redis_addr=cache_redis_addr,
     cache_redis_password=cache_redis_password,
     cache_redis_db_index=cache_redis_db_index,
-    core_secret=core_secret,
+    core_secret=config_dict['core_secret'],
     storage_driver=storage_driver,
-    all_storage_driver_configs=all_storage_provider_configs)
\ No newline at end of file
+    all_storage_driver_configs=all_storage_provider_configs,
+    public_url=config_dict['public_url'])
\ No newline at end of file
diff --git a/src/chartserver/handler_repo.go b/src/chartserver/handler_repo.go
index 13ea46a40..390330c89 100644
--- a/src/chartserver/handler_repo.go
+++ b/src/chartserver/handler_repo.go
@@ -3,6 +3,7 @@ package chartserver
 import (
 	"fmt"
 	"path"
+	"strings"
 	"sync"
 	"time"
 
@@ -190,7 +191,9 @@ func (c *Controller) mergeIndexFile(namespace string,
 			version.Name = nameWithNS
 			// Currently there is only one url
 			for index, url := range version.URLs {
-				version.URLs[index] = path.Join(namespace, url)
+				if !strings.HasPrefix(url, "http") {
+					version.URLs[index] = path.Join(namespace, url)
+				}
 			}
 		}
 
diff --git a/src/chartserver/handler_utility.go b/src/chartserver/handler_utility.go
index 1fa1b89a2..07aa93409 100644
--- a/src/chartserver/handler_utility.go
+++ b/src/chartserver/handler_utility.go
@@ -1,14 +1,16 @@
 package chartserver
 
 import (
-	"errors"
 	"fmt"
 	"path"
 	"strings"
 	"sync"
 
-	hlog "github.com/goharbor/harbor/src/common/utils/log"
+	"github.com/pkg/errors"
 	"k8s.io/helm/cmd/helm/search"
+
+	hlog "github.com/goharbor/harbor/src/common/utils/log"
+	"github.com/goharbor/harbor/src/core/config"
 )
 
 const (
@@ -216,8 +218,18 @@ func (c *Controller) SearchChart(q string, namespaces []string) ([]*search.Resul
 
 // Get the content bytes of the chart version
 func (c *Controller) getChartVersionContent(namespace string, subPath string) ([]byte, error) {
-	url := path.Join(namespace, subPath)
+	hlog.Infof("namespace: %v, subpath: %v", namespace, subPath)
+	var url string
+	if strings.HasPrefix(subPath, "http") {
+		extEndpoint, err := config.ExtEndpoint()
+		if err != nil {
+			return nil, errors.Wrap(err, "can not get ext endpoint")
+		}
+		url = strings.TrimPrefix(subPath, fmt.Sprintf("%s/%s", extEndpoint, "chartrepo/"))
+		hlog.Infof("extendpoint: %v, trim head: %v result url: %v", extEndpoint, fmt.Sprintf("%s/%s", extEndpoint, "chartrepo"), url)
+	} else {
+		url = path.Join(namespace, subPath)
+	}
 	url = fmt.Sprintf("%s/%s", c.backendServerAddress.String(), url)
-
 	return c.apiClient.GetContent(url)
 }
diff --git a/src/core/api/chart_repository.go b/src/core/api/chart_repository.go
index a3d0e522f..0712fb386 100644
--- a/src/core/api/chart_repository.go
+++ b/src/core/api/chart_repository.go
@@ -544,5 +544,10 @@ func isMultipartFormData(req *http.Request) bool {
 
 // Return the chart full name
 func chartFullName(namespace, chartName, version string) string {
-	return fmt.Sprintf("%s/%s:%s", namespace, chartName, version)
+	if strings.HasPrefix(chartName, "http") {
+		return fmt.Sprintf("%s:%s", namespace, chartName, version)
+	} else {
+		return fmt.Sprintf("%s/%s:%s", namespace, chartName, version)
+
+	}
 }