[chores:fix] Fixed radius batch RADIUS_API_BASEURL #608

We recently introduced websocket routes but forgot
to allow connecting a different host specified in
RADIUS_API_BASEURL.

Related to #608

Author: nemesifier

openwisp_radius/admin.py

@@ -435,6 +435,7 @@ def change_view(self, request, object_id, form_url="", extra_context=None):
             if RADIUS_API_BASEURL:
                 batch_pdf_api_url = urljoin(RADIUS_API_BASEURL, batch_pdf_api_url)
             extra_context["download_rad_batch_pdf_url"] = batch_pdf_api_url
+        extra_context["RADIUS_API_BASEURL"] = RADIUS_API_BASEURL
         return super().change_view(
             request,
             object_id,

openwisp_radius/templates/openwisp-radius/admin/rad_batch_users_change_form.html

@@ -48,7 +48,12 @@
             if (batchStatus === "processing") {
                 const batchId = "{{ original.pk }}";
                 const protocol = window.location.protocol === "https:" ? "wss:" : "ws:";
-                const wsPath = protocol + "//" + window.location.host + "/ws/radius/batch/" + batchId + "/";
+                {% if RADIUS_API_BASEURL != "/" %}
+                  const baseUrl = "{{ RADIUS_API_BASEURL }}";
+                {% else %}
+                  const baseUrl = protocol + "//" + window.location.host;
+                {% endif %}
+                const wsPath = baseUrl + "/ws/radius/batch/" + batchId + "/";
                 const socket = new WebSocket(wsPath);
 
                 socket.onmessage = function(e) {