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From: bugzilla@apache.org
To: dev@tomcat.apache.org
Subject: DO NOT REPLY [Bug 52517] New: Server affecting URLConnector's
 defaultUseCache settings
Date: Tue, 24 Jan 2012 15:41:10 +0000
Message-ID: <bug-52517-78@https.issues.apache.org/bugzilla/>
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https://issues.apache.org/bugzilla/show_bug.cgi?id=52517

             Bug #: 52517
           Summary: Server affecting URLConnector's defaultUseCache
                    settings
           Product: Tomcat 6
           Version: unspecified
          Platform: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
        AssignedTo: dev@tomcat.apache.org
        ReportedBy: kamil.toszek@gmail.com
    Classification: Unclassified


After migrating to Tomcat 6 (from Tomcat 5), connections made by servlets using
URLConnection have additional request headers -> "Cache-Control"and "Pragma".

After looking at the OpenJDK6 implementation of URLConnection class, in 
private void writeRequests() function I have found this lines:
if(!getUseCaches())
{
   requests.setIfNotSet("Cache-Control", "no-cache");
   requests.setIfNotSet("Pragma", "no-cache");
}

Now, urlconnection.getDefaultUseCaches on Tomcat 5 returns null, but on Tomcat
6 the same code returns false, thus Tomcat 6 affects behavior of Java Runtime
Environment.

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