Merge lp:~wgrant/launchpad/dmp-redirect-2 into lp:launchpad

[William Grant]

Also allow archive mirrors to redirect pool files.

The base ProberProtocol is now unused, but that refactoring can wait.

[Colin Watson (cjwatson)]

review: Approve

=== modified file 'lib/lp/registry/doc/distribution-mirror.txt'
--- lib/lp/registry/doc/distribution-mirror.txt	2019-07-23 14:52:01 +0000
+++ lib/lp/registry/doc/distribution-mirror.txt	2019-08-23 02:32:08 +0000
@@ -767,6 +767,19 @@
     >>> archive_mirror.getOverallFreshness().title
     'Up to date'
 
+apt has supported HTTP redirects since Ubuntu 9.04, so mirrors that redirect are treated as good:
+
+    >>> archive_mirror = mirrorset.getByName('archive-redirect-mirror')
+    >>> mirror_arch_series = (
+    ...     archive_mirror.getSummarizedMirroredArchSeries())
+
+    # We only have a few publishing records, so most of the cdimage mirrors
+    # will have Unknown as their freshness.
+    >>> for mirror_arch_series in mirror_arch_series:
+    ...     print (mirror_arch_series.distro_arch_series.displayname,
+    ...            mirror_arch_series.freshness.title)
+    (u'Ubuntu Warty i386', 'Up to date')
+
 
 Now we check the MirrorCDImageDistroSeriess of a cdimage mirror.
 
 
=== modified file 'lib/lp/registry/scripts/distributionmirror_prober.py'
--- lib/lp/registry/scripts/distributionmirror_prober.py	2019-07-23 14:52:01 +0000
+++ lib/lp/registry/scripts/distributionmirror_prober.py	2019-08-23 02:32:08 +0000
@@ -505,7 +505,7 @@
         # there.
         arch_or_source_mirror.freshness = MirrorFreshness.UNKNOWN
         for freshness, url in freshness_url_map.items():
-            prober = ProberFactory(url)
+            prober = RedirectAwareProberFactory(url)
             deferred = request_manager.run(prober.request_host, prober.probe)
             deferred.addCallback(
                 self.setMirrorFreshness, arch_or_source_mirror, freshness,