URLConnection returns NULL when called from within a weblogic servlet

Question

The following code snippet works when executed outside of weblogic, but does
not work from within a weblogic servlet instance.
URL u = new URL("http://" + ipString + newString.toString());
URLConnection uc = u.openConnection();
BufferedReader in = new BufferedReader (new InputStreamReader(uc.getInputStream()));
String response = "", response2 = "";
while(response2 != null)
     response = ((response2 = in.readLine()) == null) ? response : response + response2;
The response is quite big. When this code is executed from within a weblogic servlet instance,
in.readLine always returns a null right away. Yet a TCP/IP trace shows that the packets are coming
back to my NT machine.
Other info:
Inside of weblogic:
u's handler is of type weblogic.net.http.Hanlder
uc is of type weblogic.net.http.HttpURLConnection
Outside of weblogic:
u's handler is of type sun.net.www.protocol.http.Handler
uc is of type sun.new.www.protocol.http.HttpURLConnection
Weblogic V4.51. Running on NT.
Attempted the following to no avail:
1. installing sp11
2. changing the security to permission java.security.AllPermission;
3. adding the following calls : uc.setRequestProperty("Content-Type", "text/xml");          
          uc.setDoInput(true);
          uc.setDoOutput(true);
4. Started playing around with modifying the java.protocol.handler.pkgs system property,
but I shouldn't have to do this.
Any help would be appreciated.

Answer 1

There are some problems with the WL implementations of certain protocols.
WL hides the Sun implementations when you are in the WebLogic server. Here
is an a solution that was posted to a similar problem:
Https is an add-in so to speak. Try this before you create your url:
System.setProperty ("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
// add the default security provider (again, in JSSE1.0.1)
int iap = java.security.Security.addProvider(new
com.sun.net.ssl.internal.ssl.Provider() );
dennisNote how the code overides the WL setting which overode the Sun setting.
Cameron Purdy
[email protected]
http://www.tangosol.com
WebLogic Consulting Available
"Brian Howell" <[email protected]> wrote in message
news:[email protected]...
>
The following code snippet works when executed outside of weblogic, butdoes
not work from within a weblogic servlet instance.
URL u = new URL("http://" + ipString + newString.toString());
URLConnection uc = u.openConnection();
BufferedReader in = new BufferedReader (newInputStreamReader(uc.getInputStream()));
>
String response = "", response2 = "";
while(response2 != null)
response = ((response2 = in.readLine()) == null) ? response : response +response2;
The response is quite big. When this code is executed from within aweblogic servlet instance,
in.readLine always returns a null right away. Yet a TCP/IP trace showsthat the packets are coming
back to my NT machine.
Other info:
Inside of weblogic:
u's handler is of type weblogic.net.http.Hanlder
uc is of type weblogic.net.http.HttpURLConnection
Outside of weblogic:
u's handler is of type sun.net.www.protocol.http.Handler
uc is of type sun.new.www.protocol.http.HttpURLConnection
Weblogic V4.51. Running on NT.
Attempted the following to no avail:
1. installing sp11
2. changing the security to permission java.security.AllPermission;
3. adding the following calls : uc.setRequestProperty("Content-Type","text/xml");
uc.setDoInput(true);
uc.setDoOutput(true);
4. Started playing around with modifying the java.protocol.handler.pkgssystem property,
but I shouldn't have to do this.
Any help would be appreciated.