check internal redirections for loops, too

Now that we have the redirections loopchecker centrally in our items we
can use it also to prevent internal redirections to loop caused by
bugs as in a few instances we get into the business of rewriting the URI
we will query by ourself as we predict we would see such a redirect
anyway. Our code has no bugs of course, hence no practical difference. ;)

Gbp-Dch: Ignore

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index f13d2f6aefa1befe49a117d575b973d22a7d4ca3..623ea75184becaae5c44b0c7fd184b7afc0a0f28 100644 (file)
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -991,6 +991,9 @@ std::string pkgAcquire::Item::HashSum() const                               /*{{{*/
                                                                        /*}}}*/
 bool pkgAcquire::Item::IsRedirectionLoop(std::string const &NewURI)    /*{{{*/
 {
+   // store can fail due to permission errors and the item will "loop" then
+   if (APT::String::Startswith(NewURI, "store:"))
+      return false;
    if (d->PastRedirections.empty())
    {
       d->PastRedirections.push_back(NewURI);

diff --git a/apt-pkg/acquire-worker.cc b/apt-pkg/acquire-worker.cc
index aa1a2654e0a47a8e3d70c9eb09c483647e39cd59..a4fbc765157b4ee0f410b014a5ee28800ab11b76 100644 (file)
--- a/apt-pkg/acquire-worker.cc
+++ b/apt-pkg/acquire-worker.cc
@@ -686,6 +686,25 @@ bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
       return true;
    }
 
+   if (Item->Owner->IsRedirectionLoop(Item->URI))
+   {
+      std::string const Message = "400 URI Failure"
+        "\nURI: " + Item->URI +
+        "\nFilename: " + Item->Owner->DestFile +
+        "\nFailReason: RedirectionLoop";
+
+      auto const ItmOwners = Item->Owners;
+      for (auto &O: ItmOwners)
+      {
+        O->Status = pkgAcquire::Item::StatError;
+        O->Failed(Message, Config);
+        if (Log != nullptr)
+           Log->Fail(O->GetItemDesc());
+      }
+      // "queued" successfully, the item just instantly failed
+      return true;
+   }
+
    string Message = "600 URI Acquire\n";
    Message.reserve(300);
    Message += "URI: " + Item->URI;