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ID Category Severity Reproducibility Date Submitted Last Update
0003341 [Hessian] major always 02-13-09 11:45 03-01-09 13:47
Reporter everflux View Status public  
Assigned To
Priority normal Resolution open Platform
Status new   OS
Projection none   OS Version
ETA none Fixed in Version Product Version 3.2.1
  Product Build
Summary 0003341: hessian 3.2.1 does not work with phphessian while hessian 3.1.6 does
Description Using phphessian to create a hessian service in php and calling from java (groovy) it does not work using hessian-3.2.1.jar
If using hessian-3.1.6.jar the very same application works.
Steps To Reproduce
Additional Information using phphessian this is the sample service
<?php

include_once 'HessianPHP/dist/HessianService.php';
$wrapper = &new HessianService();
//enable method browsing with http get
$wrapper->setDisplayInfo(true);
$wrapper->registerObject(new Demo());
$wrapper->service();


class Demo
{
  function run($n1,$n2) {
      $result = "";
      $result .= "hello $n1 $n2";
      return $result;
  }

  function arrayResult($n1, $n2)
  {
      $result = array();
      $result[0] = $n1;
      $result[1] = strlen($n1);
      $result[2] = $n2;
      $result[3] = strlen($n1);

      return $result;
  }

  function objectResult($n1, $n2)
  {
      $result;
      $result->nameOne = $n1;
      $result->nameTwo = $n2;

      return $result;
  }

}

?>

this is the call in groovy
import com.caucho.hessian.client.HessianProxyFactory;

def n1='tkruse'
def n2='muenster'

url ="http://localhost/~tkruse/hessianRules/server.php" [^]

HessianProxyFactory factory = new HessianProxyFactory();
//factory.setDebug(true);
factory.setChunkedPost(false);
service = factory.create(DemoInterface.class, url);


println (service.run(n1, n2))

service.arrayResult(n1, n2).each{println "entry: " + it}


When having the debug mode on, it looks like there is something swallowing the first byte containing "r", so hessian does not recognize the response correctly:

Exception in thread "main" com.caucho.hessian.client.HessianRuntimeException: com.caucho.hessian.io.HessianProtocolException: expected hessian reply at 0x1 ()
at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:258)
        at $Proxy0.run(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Having a look on a tcpdump everything looks correctly. Since changeing just the hessian jar solves this issue there seems something changed between them.
Attached Files

- Relationships

- Notes
(0003852)
Peter Dettman
02-27-09 03:56

 I believe the problem here is that the client is (implicitly) asking for a Hessian 2.0 reply, and the 2.0 implementation is still 'evolving' (still a draft spec?).

Try calling factory.setHessian2Reply(false).
 
(0003854)
everflux
03-01-09 13:47

 I think your hint got me into the right direction, but I still believe it's not the PHP server, but the java client implementation.
I tried hessian 3.2.0, that works too.
Looking through the sources is confusing, the hessian proxy factory can return a hessianInput, hessian1Input and hessian2Input - but in fact getHessianInput and getHessian2Input both return a Hessian2Input. (The getHessian1Input method seems to be never called, too)
I believe starting a reply with "H" signals to use Hessian 2 protocol, while "r" should indicate a standard Hessian (1) reply.
I could not figure out what happens exactly, I think it is about reading a byte too much (or too less) from the input stream.
If I change the HessianProxy line 239 to read
in = _factory.getHessian1Input(is);
I get a different error, too:
Caused by: com.caucho.hessian.io.HessianProtocolException: expected string at 0x0
instead of the
Caused by: com.caucho.hessian.io.HessianProtocolException: expected hessian reply at 0x1
 

- Issue History
Date Modified Username Field Change
02-13-09 11:45 everflux New Issue
02-27-09 03:56 Peter Dettman Note Added: 0003852
02-27-09 03:56 Peter Dettman Issue Monitored: Peter Dettman
03-01-09 13:47 everflux Note Added: 0003854
08-28-09 09:54 Peter Dettman Issue End Monitor: Peter Dettman

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