1 files changed, 78 insertions, 9 deletions

diff --git a/methods/server.cc b/methods/server.cc
index e321e0230..2116926b0 100644
--- a/methods/server.cc
+++ b/methods/server.cc
@@ -235,10 +235,21 @@ ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOu
    Reset();
 }
 									/*}}}*/
+bool ServerState::AddPartialFileToHashes(FileFd &File)			/*{{{*/
+{
+   File.Truncate(StartPos);
+   return GetHashes()->AddFD(File, StartPos);
+}
+									/*}}}*/
 
 bool ServerMethod::Configuration(string Message)			/*{{{*/
 {
-   return pkgAcqMethod::Configuration(Message);
+   if (pkgAcqMethod::Configuration(Message) == false)
+      return false;
+
+   DropPrivsOrDie();
+
+   return true;
 }
 									/*}}}*/
 
@@ -328,10 +339,10 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       failure */
    if (Server->Result < 200 || Server->Result >= 300)
    {
-      char err[255];
-      snprintf(err,sizeof(err)-1,"HttpError%i",Server->Result);
+      std::string err;
+      strprintf(err, "HttpError%u", Server->Result);
       SetFailReason(err);
-      _error->Error("%u %s",Server->Result,Server->Code);
+      _error->Error("%u %s", Server->Result, Server->Code);
       if (Server->HaveContent == true)
 	 return ERROR_WITH_CONTENT_PAGE;
       return ERROR_UNRECOVERABLE;
@@ -352,7 +363,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
    FailFd = File->Fd();
    FailTime = Server->Date;
 
-   if (Server->InitHashes(*File) == false)
+   if (Server->InitHashes(Queue->ExpectedHashes) == false || Server->AddPartialFileToHashes(*File) == false)
    {
       _error->Errno("read",_("Problem hashing file"));
       return ERROR_NOT_FROM_SERVER;
@@ -397,9 +408,16 @@ bool ServerMethod::Fetch(FetchItem *)
    for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth; 
 	I = I->Next, Depth++)
    {
-      // If pipelining is disabled, we only queue 1 request
-      if (Server->Pipeline == false && Depth >= 0)
-	 break;
+      if (Depth >= 0)
+      {
+	 // If pipelining is disabled, we only queue 1 request
+	 if (Server->Pipeline == false)
+	    break;
+	 // if we have no hashes, do at most one such request
+	 // as we can't fixup pipeling misbehaviors otherwise
+	 else if (I->ExpectedHashes.usable() == false)
+	    break;
+      }
       
       // Make sure we stick with the same server
       if (Server->Comp(I->Uri) == false)
@@ -529,6 +547,13 @@ int ServerMethod::Loop()
 
 	    // Run the data
 	    bool Result = true;
+
+            // ensure we don't fetch too much
+            // we could do "Server->MaximumSize = Queue->MaximumSize" here
+            // but that would break the clever pipeline messup detection
+            // so instead we use the size of the biggest item in the queue
+            Server->MaximumSize = FindMaximumObjectSizeInQueue();
+
             if (Server->HaveContent)
 	       Result = Server->RunData(File);
 
@@ -551,7 +576,38 @@ int ServerMethod::Loop()
 	    // Send status to APT
 	    if (Result == true)
 	    {
-	       Res.TakeHashes(*Server->GetHashes());
+	       Hashes * const resultHashes = Server->GetHashes();
+	       HashStringList const hashList = resultHashes->GetHashStringList();
+	       if (PipelineDepth != 0 && Queue->ExpectedHashes.usable() == true && Queue->ExpectedHashes != hashList)
+	       {
+		  // we did not get the expected hash… mhhh:
+		  // could it be that server/proxy messed up pipelining?
+		  FetchItem * BeforeI = Queue;
+		  for (FetchItem *I = Queue->Next; I != 0 && I != QueueBack; I = I->Next)
+		  {
+		     if (I->ExpectedHashes.usable() == true && I->ExpectedHashes == hashList)
+		     {
+			// yes, he did! Disable pipelining and rewrite queue
+			if (Server->Pipeline == true)
+			{
+			   // FIXME: fake a warning message as we have no proper way of communicating here
+			   std::string out;
+			   strprintf(out, _("Automatically disabled %s due to incorrect response from server/proxy. (man 5 apt.conf)"), "Acquire::http::PipelineDepth");
+			   std::cerr << "W: " << out << std::endl;
+			   Server->Pipeline = false;
+			   // we keep the PipelineDepth value so that the rest of the queue can be fixed up as well
+			}
+			Rename(Res.Filename, I->DestFile);
+			Res.Filename = I->DestFile;
+			BeforeI->Next = I->Next;
+			I->Next = Queue;
+			Queue = I;
+			break;
+		     }
+		     BeforeI = I;
+		  }
+	       }
+	       Res.TakeHashes(*resultHashes);
 	       URIDone(Res);
 	    }
 	    else
@@ -571,7 +627,10 @@ int ServerMethod::Loop()
 		  QueueBack = Queue;
 	       }
 	       else
+               {
+                  Server->Close();
 		  Fail(true);
+               }
 	    }
 	    break;
 	 }
@@ -666,3 +725,13 @@ int ServerMethod::Loop()
    return 0;
 }
 									/*}}}*/
+                         						/*{{{*/
+unsigned long long
+ServerMethod::FindMaximumObjectSizeInQueue() const 
+{
+   unsigned long long MaxSizeInQueue = 0;
+   for (FetchItem *I = Queue; I != 0 && I != QueueBack; I = I->Next)
+      MaxSizeInQueue = std::max(MaxSizeInQueue, I->MaximumSize);
+   return MaxSizeInQueue;
+}
+									/*}}}*/