diff --git a/ckanext/markdown_view/plugin.py b/ckanext/markdown_view/plugin.py
index 81a5cd3..167900c 100644
--- a/ckanext/markdown_view/plugin.py
+++ b/ckanext/markdown_view/plugin.py
@@ -24,11 +24,14 @@ def info(self):
             'icon': 'file-text-o',
             'filterable': False,
             'iframed': False,
-            'schema': {'page_url': [ignore_empty, unicode_safe, url_validator]},
+            'always_available': True,
+            'schema': {
+                'page_url': [unicode_safe, url_validator, url_to_md_file]
+            },
         }
 
     def can_view(self, data_dict):
-        return data_dict['resource'].get('format', '').lower() in ('text/markdown', 'markdown', 'md')
+        return data_dict.get('resource', {}).get('format', '').lower() in ('text/markdown', 'markdown', 'md')
 
     def setup_template_variables(self, context, data_dict):
         resource = data_dict['resource']
@@ -44,3 +47,12 @@ def view_template(self, context, data_dict):
 
     def form_template(self, context, data_dict):
         return 'markdown_form.html'
+
+
+def url_to_md_file(value):
+    if not value:
+        return None
+    elif value.endswith('.md'):
+        return value
+    else:
+        raise tk.Invalid(tk._('Url should point to a markdown file (ends with .md)'))
diff --git a/ckanext/markdown_view/templates/markdown_view.html b/ckanext/markdown_view/templates/markdown_view.html
index 0ae860c..aa886b5 100644
--- a/ckanext/markdown_view/templates/markdown_view.html
+++ b/ckanext/markdown_view/templates/markdown_view.html
@@ -1,2 +1,10 @@
 {% asset 'md_view_assets/md_view_js' %}
-<div id="md_view_html" data-resource-url="{{ resource_view.get('page_url', resource_url) }}"></div>
+
+{% set page_url = resource_view.get('page_url') %}
+{% if page_url and page_url.endswith('.md') %}
+    <div id="md_view_html" data-resource-url="{{ page_url }}"></div>
+{% elif resource_url.endswith('.md') %}
+    <div id="md_view_html" data-resource-url="{{ resource_url }}"></div>
+{% else %}
+    <div class="alert alert-warning" role="alert">This Resource cannot be processed by markdown view.</div>
+{% endif %}
diff --git a/ckanext/markdown_view/tests/test_view.py b/ckanext/markdown_view/tests/test_view.py
index abac3ea..831d550 100644
--- a/ckanext/markdown_view/tests/test_view.py
+++ b/ckanext/markdown_view/tests/test_view.py
@@ -1,29 +1,52 @@
 # encoding: utf-8
 import pytest
-import responses
 from ckan.tests import factories
 
 import ckan.plugins as p
-from ckan.plugins import toolkit as tk
+from ckan.logic import ValidationError
 
 
-def _add_responses_solr_passthru():
-    responses.add_passthru(tk.config.get('solr_url'))
+@pytest.mark.usefixtures('clean_db', 'clean_index', 'with_plugins', 'with_request_context')
+@pytest.mark.ckan_config('ckan.plugins', 'markdown_view')
+def test_view_create_for_md_resource(app):
+    org = factories.Organization()
+    dataset = factories.Dataset(owner_org=org['id'],)
+    sysadmin = factories.Sysadmin()
+    resource = factories.Resource(
+        package_id=dataset['id'],
+        url='http://some.website.md',
+        format='md'
+    )
+
+    resource_view = factories.ResourceView(
+        resource_id=resource['id'],
+        view_type='Markdown'
+    )
+
+    response = p.toolkit.get_action('resource_view_show')(
+        {'user': sysadmin.get('name')},
+        {'id': resource_view.get('id')}
+    )
+
+    assert response.get('view_type') == 'Markdown'
+    env = {"REMOTE_USER": sysadmin['name'].encode('ascii')}
+    resp = app.get(f"/dataset/{dataset['id']}/resource/{resource['id']}?view_id={resource_view['id']}",
+                   extra_environ=env)
+
+    assert resp.status_code == 200
+    assert f'<div id="md_view_html" data-resource-url="{resource["url"]}"></div>' in resp.body
 
 
 @pytest.mark.usefixtures('clean_db', 'clean_index', 'with_plugins', 'with_request_context')
-@pytest.mark.ckan_config('ckan.plugins', 'datastore markdown_view')
-def test_view_create():
+@pytest.mark.ckan_config('ckan.plugins', 'markdown_view')
+def test_view_create_for_csv_resource(app):
     org = factories.Organization()
     dataset = factories.Dataset(owner_org=org['id'],)
     sysadmin = factories.Sysadmin()
     resource = factories.Resource(
         package_id=dataset['id'],
-        url='http://some.website.html',)
-
-    p.toolkit.get_action('datastore_create')(
-       {'user': sysadmin.get('name')},
-       {'resource_id': resource.get('id'), 'force': True}
+        url='http://some.website.csv',
+        format='csv'
     )
 
     resource_view = factories.ResourceView(
@@ -37,3 +60,63 @@ def test_view_create():
     )
 
     assert response.get('view_type') == 'Markdown'
+
+    env = {"REMOTE_USER": sysadmin['name'].encode('ascii')}
+    resp = app.get(f"/dataset/{dataset['id']}/resource/{resource['id']}?view_id={resource_view['id']}", extra_environ=env)
+
+    assert resp.status_code == 200
+    assert 'This Resource cannot be processed by markdown view.' in resp.body
+
+
+@pytest.mark.usefixtures('clean_db', 'clean_index', 'with_plugins', 'with_request_context')
+@pytest.mark.ckan_config('ckan.plugins', 'markdown_view')
+def test_view_create_for_csv_resource_with_correct_page_url(app):
+    org = factories.Organization()
+    dataset = factories.Dataset(owner_org=org['id'],)
+    sysadmin = factories.Sysadmin()
+    resource = factories.Resource(
+        package_id=dataset['id'],
+        url='http://some.website.csv',
+        format='csv'
+    )
+    page_url = 'http://some.website.md'
+
+    resource_view = factories.ResourceView(
+        resource_id=resource['id'],
+        view_type='Markdown',
+        page_url=page_url,
+    )
+
+    response = p.toolkit.get_action('resource_view_show')(
+        {'user': sysadmin.get('name')},
+        {'id': resource_view.get('id')}
+    )
+
+    assert response.get('view_type') == 'Markdown'
+
+    env = {"REMOTE_USER": sysadmin['name'].encode('ascii')}
+    resp = app.get(f"/dataset/{dataset['id']}/resource/{resource['id']}?view_id={resource_view['id']}",
+                   extra_environ=env)
+
+    assert resp.status_code == 200
+    assert f'<div id="md_view_html" data-resource-url="{page_url}"></div>' in resp.body
+
+
+@pytest.mark.usefixtures('clean_db', 'clean_index', 'with_plugins', 'with_request_context')
+@pytest.mark.ckan_config('ckan.plugins', 'markdown_view')
+def test_view_create_for_csv_resource_with_incorrect_page_url(app):
+    org = factories.Organization()
+    dataset = factories.Dataset(owner_org=org['id'], )
+    resource = factories.Resource(
+        package_id=dataset['id'],
+        url='http://some.website.csv',
+        format='csv'
+    )
+    page_url = 'http://some.website.html'
+
+    with pytest.raises(ValidationError):
+        factories.ResourceView(
+            resource_id=resource['id'],
+            view_type='Markdown',
+            page_url=page_url,
+        )