Adding ability to download job binaries

There is now the ability to download job binaries both
from the job binaires table and from the job binaries
description page.

Closes-Bug: #1251288

Change-Id: Ie7dae47f2b682a0093bbfa40457c67eb94d070c7

savannadashboard/job_binaries/tables.py

@@ -58,6 +58,13 @@ class DeleteJobBinary(tables.BatchAction):
         savanna.job_binaries.delete(obj_id)
 
 
+class DownloadJobBinary(tables.LinkAction):
+    name = "download job binary"
+    verbose_name = _("Download Job Binary")
+    url = "horizon:savanna:job_binaries:download"
+    classes = ("btn-edit")
+
+
 class JobBinariesTable(tables.DataTable):
     name = tables.Column("name",
                          verbose_name=_("Name"),
@@ -72,4 +79,4 @@ class JobBinariesTable(tables.DataTable):
         verbose_name = _("Job Binaries")
         table_actions = (CreateJobBinary,
                          DeleteJobBinary)
-        row_actions = (DeleteJobBinary,)
+        row_actions = (DeleteJobBinary, DownloadJobBinary)

savannadashboard/job_binaries/urls.py

@@ -31,4 +31,7 @@ urlpatterns = patterns('',
                            name='create-job-binary'),
                        url(r'^(?P<job_binary_id>[^/]+)$',
                            views.JobBinaryDetailsView.as_view(),
-                           name='details'))
+                           name='details'),
+                       url(r'^(?P<job_binary_id>[^/]+)/download/$',
+                           views.DownloadJobBinaryView.as_view(),
+                           name='download'))

savannadashboard/job_binaries/views.py

@@ -17,8 +17,14 @@
 
 import logging
 
+from django.core.urlresolvers import reverse
 from django.core.urlresolvers import reverse_lazy
+from django import http
+from django.template.defaultfilters import slugify
+from django.utils.translation import ugettext_lazy as _
+from django.views.generic import View
 
+from horizon import exceptions
 from horizon import forms
 from horizon import tables
 from horizon import tabs
@@ -61,3 +67,23 @@ class JobBinaryDetailsView(tabs.TabView):
 
     def get_data(self):
         pass
+
+
+class DownloadJobBinaryView(View):
+    def get(self, request, job_binary_id=None):
+        try:
+            savanna = savannaclient(request)
+            jb = savanna.job_binaries.get(job_binary_id)
+            data = savanna.job_binaries.get_file(job_binary_id)
+        except Exception:
+            redirect = reverse('horizon:savanna:job_binaries:index')
+            exceptions.handle(self.request,
+                              _('Unable to fetch job binary: %(exc)s'),
+                              redirect=redirect)
+
+        response = http.HttpResponse(mimetype='application/binary')
+        response['Content-Disposition'] = \
+            'attachment; filename=%s' % slugify(jb.name)
+        response.write(data)
+        response['Content-Length'] = str(len(data))
+        return response

savannadashboard/templates/job_binaries/_details.html

@@ -15,4 +15,5 @@
         <dt>{% trans "Create time" %}</dt>
         <dd>{{ job_binary.created_at }}</dd>
     </dl>
+    <a href="{% url 'horizon:savanna:job_binaries:download' job_binary.id %}">{% trans "Download Job Binary" %}</a>
 </div>