Add ability to download package from web interface

After adding filename to the database, this is a rather simple request (see
FS#19546). Right now the "randomly" chosen mirror happens to always be
mirrors.kernel.org as it is the only one filed under the 'Any' country which
is what we screen on. Perhaps this logic could be improved in the future but
I don't see these links being all that high traffic anyway.

Signed-off-by: Dan McGee <dan@archlinux.org>

packages/views.py

@@ -12,9 +12,11 @@
 from django.db.models import Q
 
 import datetime
+import string
 
 from main.models import Package, PackageFile
 from main.models import Arch, Repo, Signoff
+from main.models import MirrorUrl
 from main.utils import make_choice
 from packages.models import PackageRelation
 
@@ -316,5 +318,19 @@ def flag(request, name='', repo='', arch=''):
 
     return render_to_response('packages/flag.html', context)
 
-# vim: set ts=4 sw=4 et:
+def download(request, name='', repo='', arch=''):
+    pkg = get_object_or_404(Package,
+            pkgname=name, repo__name__iexact=repo, arch__name=arch)
+    mirrorurl = MirrorUrl.objects.filter(mirror__country='Any',
+            mirror__public=True, mirror__active=True,
+            protocol__protocol__iexact='HTTP')[0]
+    details = {
+        'host': mirrorurl.url,
+        'arch': pkg.arch.name,
+        'repo': pkg.repo.name.lower(),
+        'file': pkg.filename,
+    }
+    url = string.Template('${host}${repo}/os/${arch}/${file}').substitute(details)
+    return HttpResponseRedirect(url)
 
+# vim: set ts=4 sw=4 et:

templates/packages/details.html

@@ -28,6 +28,7 @@ <h2>Package Details: {{ pkg.pkgname }} {{ pkg.pkgver }}-{{ pkg.pkgrel }}</h2>
                 'height=350,width=450,location=no,scrollbars=yes,menubars=no,toolbars=no,resizable=no');">(?)</a>
             {% endif %}
             </li>
+            <li><a href="download/" title="Download {{ pkg.pkgname }} from mirror">Download From Mirror</a></li>
         </ul>
 
         {% if user.is_authenticated %}

urls.py

@@ -52,6 +52,8 @@
         'packages.views.flag'),
     (r'^packages/(?P<repo>[A-z0-9\-]+)/(?P<arch>[A-z0-9]+)/(?P<name>[A-z0-9\-+.]+)/unflag/$',
         'packages.views.unflag'),
+    (r'^packages/(?P<repo>[A-z0-9\-]+)/(?P<arch>[A-z0-9]+)/(?P<name>[A-z0-9\-+.]+)/download/$',
+        'packages.views.download'),
 
     (r'^todo/(\d+)/$',              'todolists.views.view'),
     (r'^todo/add/$',                'todolists.views.add'),