Bug #11895 --> add protection for preventing multiple get new message calls on the same server.

Don't run pop urls if the server is already busy.

mailnews/local/src/nsPop3Protocol.cpp

@@ -518,7 +518,10 @@ nsresult nsPop3Protocol::LoadUrl(nsIURI* aURL, nsISupports * /* aConsumer */)
 
     nsCOMPtr<nsIMsgIncomingServer> server = do_QueryInterface(popServer);
     if (server)
+	{
         rv = server->GetLocalPath(&mailDirectory);
+		server->SetServerBusy(PR_TRUE); // the server is now busy
+	}
 
     m_pop3ConData->uidlinfo = net_pop3_load_state(host, GetUsername(), mailDirectory);
     PL_strfree(mailDirectory);
@@ -2650,6 +2653,15 @@ nsresult nsPop3Protocol::ProcessProtocolState(nsIURI * url, nsIInputStream * aIn
 			if (mailnewsurl)
 				mailnewsurl->SetUrlState(PR_FALSE, NS_OK);
 
+			if (m_nsIPop3Sink)
+			{
+				nsCOMPtr<nsIPop3IncomingServer> popServer;
+				m_nsIPop3Sink->GetPopServer(getter_AddRefs(popServer));
+				nsCOMPtr<nsIMsgIncomingServer> server = do_QueryInterface(popServer);
+				if (server)
+					server->SetServerBusy(PR_FALSE); // the server is now busy
+			}
+
             m_pop3ConData->next_state = POP3_FREE;
             break;
 

mailnews/local/src/nsPop3Service.cpp

@@ -219,11 +219,19 @@ nsresult nsPop3Service::RunPopUrl(nsIMsgIncomingServer * aServer, nsIURI * aUrlT
 		// load up required server information
 		rv = aServer->GetUsername(getter_Copies(userName));
 
-		nsPop3Protocol * protocol = new nsPop3Protocol(aUrlToRun);
-		if (protocol)
+		// find out if the server is busy or not...if the server is busy, we are 
+		// *NOT* going to run the url
+		PRBool serverBusy = PR_FALSE;
+		rv = aServer->GetServerBusy(&serverBusy);
+
+		if (!serverBusy)
 		{
-			protocol->SetUsername(userName);
-			rv = protocol->LoadUrl(aUrlToRun);
+			nsPop3Protocol * protocol = new nsPop3Protocol(aUrlToRun);
+			if (protocol)
+			{
+				protocol->SetUsername(userName);
+				rv = protocol->LoadUrl(aUrlToRun);
+			}
 		} 
 	} // if server