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Re: NPE in WOHTTPConnection readResponse()
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Re: NPE in WOHTTPConnection readResponse()


  • Subject: Re: NPE in WOHTTPConnection readResponse()
  • From: Thomas <email@hidden>
  • Date: Wed, 23 Jan 2008 08:10:57 +1100

No, it does not work on Mac OS X for me. Both the following environments give the NPE in WOHTTPConnection.readResponse().

Server 10.5.1 Java 1.5 WO 5.4 Wonder build from 2 days ago, deployed using JavaMonitor

Client 10.5.1 Java 1.5 WO 5.4 Wonder build from 2 days ago, deployed in development mode through Eclipse using wo/-xxx/whatever

It is probably to do with headers, but it seems to do it for any web page, even www.apple.com. See sample code below.

Regards
Thomas

// both connectHost and connectPath are set to valid values.

WOHTTPConnection ppEchoConnection = new WOHTTPConnection(connectHost, 80);

NSMutableDictionary headers = new NSMutableDictionary();
headers.setObjectForKey("en", "Accept-Language");
headers.setObjectForKey("iso-8859-1,*,utf-8", "Accept-Charset");
headers.setObjectForKey("image/gif, image/x-xbitmap, image/jpeg, image/ pjpeg, image/png, */*", "Accept");
headers.setObjectForKey("WebObjects/5.4 [en] (i386; Mac OS X 10.5.1)","User-Agent");


WORequest request = new WORequest("GET", connectPath, "HTTP/1.1", headers, null, null);

request.setContent(connectPath);
ppEchoConnection.setReceiveTimeout(90 * 1000);
boolean success = ppEchoConnection.sendRequest(request);

// everything is working fine to this point. The web server log shows the correct URL is requested and content returned.

if (success) {
stringA = ppEchoConnection.readResponse().contentString(); // NPE below happens here
}






java.lang.NullPointerException
at com.webobjects.foundation.NSArray.toArray(NSArray.java:965)
at java.util.ArrayList.<init>(ArrayList.java:136)
at com.webobjects.appserver.WOMessage.appendHeaders(WOMessage.java:645)
at com .webobjects .appserver.WOHTTPConnection.setResponseHeaders(WOHTTPConnection.java: 124)
at com .webobjects .appserver.WOHTTPConnection.readResponse(WOHTTPConnection.java:581)
at biz.webjini.Test.fetchURL(Test.java:106)



On 23/01/2008, at 6:20 AM, Mr. Pierre Frisch wrote:

I am a bit confused. Which platform is broken? Does it work on MacOSX?

Pierre
--
Pierre Frisch
email@hidden


On Jan 22, 2008, at 10:25, Thomas wrote:

I didn't solve the problem, but I managed to get PayPal working by using my own code with a plain Java URLConnection instead of WOHTTPConnection.

I still don't know why WOHTTPConnection doesn't work. I've carefully studied the docs, and I believe it is a bug in WebObject 5.4. Moving our production server to Java 1.6 is not an option...

Note that the NPE in setHeaders below is not the same place where I get a NPE. Something is seriously broken.

Thanks anyway.

Regards
Thomas

On 23/01/2008, at 4:42 AM, Alexander Spohr wrote:

We tried some different java-versions now:

Does NOT work:
java version "1.5.0_12"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12- b04)
Java HotSpot(TM) Client VM (build 1.5.0_12-b04, mixed mode, sharing)


Does NOT work:
java version "1.5.0_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08- b03)
Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode, sharing)


Does work:
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)

Strange...

	atze


Am 22.01.2008 um 18:27 schrieb Alexander Spohr:

Similar problem here. That code runs on two machines but not on a third. We have WO in the apps bundle.

Runs on machine one using Java 1.5/MacOSX, machine two 1.6/Linux, not on machine three with 1.5/Linux.



2008-01-22 17:50:20,244 WARN [WorkerThread0] NSLog: <WOWorkerThread id=0 socket=Socket[addr127.0.0.1,port=53181,localport=2201]> Exception occurred while responding to client: java.lang.NullPointerException
[2008-1-22 16:50:20 CET] <WorkerThread0> java.lang.NullPointerException
at com.webobjects.foundation.NSArray.toArray(NSArray.java:976)
at java.util.ArrayList.<init>(ArrayList.java:136)
at com.webobjects.appserver.WOMessage.setHeaders(WOMessage.java: 363)
at com .webobjects.appserver.WOMessage._finalizeCookies(WOMessage.java: 566)
at com .webobjects .appserver.WOResponse._finalizeInContext(WOResponse.java:212)
at com .webobjects .appserver ._private .WOComponentRequestHandler ._handleRequest(WOComponentRequestHandler.java:411)
at com .webobjects .appserver ._private .WOComponentRequestHandler .handleRequest(WOComponentRequestHandler.java:442)
at com .webobjects .appserver.WOApplication.dispatchRequest(WOApplication.java:167
at com .webobjects .appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
at com .webobjects .appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
at java.lang.Thread.run(Thread.java:595)




Am 22.01.2008 um 05:24 schrieb Thomas:

I'm trying to get WOPayPal working in WO 5.4, and I've narrowed down to a problem in readResponse(). Below is some sample code I am using to fetch a page from my own web server, and it fails on that as well.

I anybody using WOHTTPConnection.readResponse() ? What am I doing wrong?

I'm running on 10.5.1 client (same happens on server) with WO 5.4 and a 5.4-specific version of WOnder from late December. It does the same with last night's build of the 5.4 WOnder.

Regards
Thomas


// both connectHost and connectPath are set to valid values.

WOHTTPConnection ppEchoConnection = new WOHTTPConnection(connectHost, 80);

NSMutableDictionary headers = new NSMutableDictionary();
headers.setObjectForKey("en", "Accept-Language");
headers.setObjectForKey("iso-8859-1,*,utf-8", "Accept-Charset");
headers.setObjectForKey("image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*", "Accept");
headers.setObjectForKey("WebObjects/5.4 [en] (i386; Mac OS X 10.5.1)","User-Agent");


WORequest request = new WORequest("GET", connectPath, "HTTP/ 1.1", headers, null, null);

request.setContent(connectPath);
ppEchoConnection.setReceiveTimeout(90 * 1000);
boolean success = ppEchoConnection.sendRequest(request);

// everything is working fine to this point. The web server log shows the correct URL is requested and content returned.

if (success) {
stringA = ppEchoConnection.readResponse().contentString(); // NPE below happens here
}






java.lang.NullPointerException
at com.webobjects.foundation.NSArray.toArray(NSArray.java:965)
at java.util.ArrayList.<init>(ArrayList.java:136)
at com.webobjects.appserver.WOMessage.appendHeaders(WOMessage.java: 645)
at com .webobjects .appserver .WOHTTPConnection.setResponseHeaders(WOHTTPConnection.java:124)
at com .webobjects .appserver.WOHTTPConnection.readResponse(WOHTTPConnection.java: 581)
at biz.webjini.Test.fetchURL(Test.java:106)




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Freeport & Soliversum Alexander Spohr email@hidden www.freeport.de


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  • Follow-Ups:
    • Re: NPE in WOHTTPConnection readResponse()
      • From: Anjo Krank <email@hidden>
    • Re: NPE in WOHTTPConnection readResponse()
      • From: "Mr. Pierre Frisch" <email@hidden>
References: 
 >NPE in WOHTTPConnection readResponse() (From: Thomas <email@hidden>)
 >Re: NPE in WOHTTPConnection readResponse() (From: Alexander Spohr <email@hidden>)
 >Re: NPE in WOHTTPConnection readResponse() (From: Thomas <email@hidden>)
 >Re: NPE in WOHTTPConnection readResponse() (From: "Mr. Pierre Frisch" <email@hidden>)

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