diff --git a/ckanext/xloader/config_declaration.yaml b/ckanext/xloader/config_declaration.yaml
index be404c93..4d1b6d50 100644
--- a/ckanext/xloader/config_declaration.yaml
+++ b/ckanext/xloader/config_declaration.yaml
@@ -3,10 +3,12 @@ groups:
   - annotation: ckanext-xloader settings
     options:
       - key: ckanext.xloader.site_url
-        default:
+        example: http://ckan-dev:5000
+        default: http://ckan-dev:5000
         description: |
             Provide an alternate site URL for the xloader_submit action.
             This is useful, for example, when the site is running within a docker network.
+        validators: configured_default("ckan.site_url",None)
         required: false
       - key: ckanext.xloader.jobs_db.uri
         default: sqlite:////tmp/xloader_jobs.db
diff --git a/ckanext/xloader/jobs.py b/ckanext/xloader/jobs.py
index 3ac8ebba..3d77e16c 100644
--- a/ckanext/xloader/jobs.py
+++ b/ckanext/xloader/jobs.py
@@ -12,11 +12,13 @@
 import sys
 
 from psycopg2 import errors
-from six.moves.urllib.parse import urlsplit
+from six.moves.urllib.parse import urlsplit, urlparse, urlunparse
 import requests
 from rq import get_current_job
 import sqlalchemy as sa
 
+from urllib.parse import urljoin, urlunsplit
+
 from ckan import model
 from ckan.plugins.toolkit import get_action, asbool, enqueue_job, ObjectNotFound, config
 
@@ -79,9 +81,15 @@ def xloader_data_into_datastore(input):
     # First flag that this task is running, to indicate the job is not
     # stillborn, for when xloader_submit is deciding whether another job would
     # be a duplicate or not
+
+    callback_url = config.get('ckanext.xloader.site_url') or config.get('ckan.site_url')
+    callback_url = urljoin(
+        callback_url.rstrip('/'), '/api/3/action/xloader_hook')
+    result_url = callback_url
+
     job_dict = dict(metadata=input['metadata'],
                     status='running')
-    callback_xloader_hook(result_url=input['result_url'],
+    callback_xloader_hook(result_url=result_url,
                           api_key=input['api_key'],
                           job_dict=job_dict)
 
@@ -143,7 +151,7 @@ def xloader_data_into_datastore(input):
         errored = True
     finally:
         # job_dict is defined in xloader_hook's docstring
-        is_saved_ok = callback_xloader_hook(result_url=input['result_url'],
+        is_saved_ok = callback_xloader_hook(result_url=result_url,
                                             api_key=input['api_key'],
                                             job_dict=job_dict)
         errored = errored or not is_saved_ok
@@ -285,6 +293,14 @@ def _download_resource_data(resource, data, api_key, logger):
             'Only http, https, and ftp resources may be fetched.'
         )
 
+    resource_uri = urlunsplit(('', '', url_parts.path, url_parts.query, url_parts.fragment))
+    callback_url = config.get('ckanext.xloader.site_url') or config.get('ckan.site_url')
+    callback_url = urljoin(
+        callback_url.rstrip('/'), resource_uri)
+    
+    url = callback_url
+    url_parts = urlsplit(url) # reparse the url after the callback_url is set
+
     # fetch the resource data
     logger.info('Fetching from: {0}'.format(url))
     tmp_file = get_tmp_file(url)