0001149: Hessian: proxy and chunked requests

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Category

Severity

Reproducibility

Date Submitted

Last Update

0001149

[Resin]

minor

always

05-26-06 13:14

06-27-06 21:39

Reporter

ferg

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

3.0.20

Product Version

Product Build

Summary

0001149: Hessian: proxy and chunked requests

Description

(rep by Alon Salant)

We have found an issue with Hessian running through some proxy servers. The issue appears to be with using keep-alives to send chunked data.

Here are Hessian POST headers for a working call:

      HTTP: 1: POST /tops-services/remote/ContentManagerRemote HTTP/1.1
      HTTP: 2: Authorization: Basic NTcyMDA2L2NsZWFjaDpjbGVhY2gx
      HTTP: 3: Content-Type: text/xml
      HTTP: 4: User-Agent: Mozilla/4.0 (Windows 2000 5.0) Java/1.5.0_06
      HTTP: 5: Host: tops.taylorpub.com
      HTTP: 6: Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
      HTTP: 7: Connection: keep-alive
      HTTP: 8: Transfer-Encoding: chunked
      HTTP: 9: Cookie: JSESSIONID=aDLoOoVXfLj9c3TXRT

Here are Hessian POST headers for the failing call:

      HTTP: 1: POST http://tops.taylorpub.com/tops-services/remote/ContentManagerRemote [^] HTTP/1.1
      HTTP: 2: Authorization: Basic NTcyMDA2L2NsZWFjaDpjbGVhY2gx
      HTTP: 3: Content-Type: text/xml
      HTTP: 4: User-Agent: Mozilla/4.0 (Windows 2000 5.0) Java/1.5.0_06
      HTTP: 5: Host: tops.taylorpub.com
      HTTP: 6: Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
      HTTP: 7: Proxy-Connection: keep-alive
      HTTP: 8: Transfer-Encoding: chunked
      HTTP: 9: Cookie: JSESSIONID=a6ODB1JO8wDcjDtYRT

The only significant difference appears to be the ‘Connection: keep-alive’ v. ‘Proxy-Connection: keep-alive’ headers.

We used a network sniffer to inspect the packets being sent. In the working case, the following packets include chunked data. In the failing case, the server responds with a 400 Bad Request and the client throws an exception:

Caused by: java.io.IOException: Error writing request body to server
    at sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.checkError(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.write(Unknown Source)
    at com.caucho.hessian.io.HessianOutput.writeBytes(HessianOutput.java:664)

Hessian on the server reports an exception:

com.caucho.hessian.io.HessianProtocolException: addContent: expected end of call ('z') at end of stream.
        at com.caucho.hessian.io.HessianInput.error(HessianInput.java:1640)
        at com.caucho.hessian.io.HessianInput.completeCall(HessianInput.java:259)
        at com.caucho.hessian.server.HessianSkeleton.invoke(HessianSkeleton.java:152)
        at org.springframework.remoting.caucho.HessianServiceExporter.handleRequest(HessianServiceExporter.java:87)
        ...

In the failing case it appears that Resin/Hessian think that the call is finished after the first chunk of the request is sent instead of waiting for the coming content as it does in the succeeding case.

My conclusion is that Resin/Hessian are not handling the ‘Proxy-Connection: keep-alive’ header correctly.

This is a fairly significant issue for us right now. I’d be happy to take some time to dig a bit deeper into the code if that would be helpful. Pointers on where to look would be appreciated. A fix would be appreciated even more J

Steps To Reproduce

Additional Information

Attached Files

Relationships

Notes
(0001342) ferg 06-27-06 21:39	Added HessianProxyFactory.setChunkedPost, although the underlying problem for the above bug report was a misconfigured gateway.

Issue History
Date Modified	Username	Field	Change
05-26-06 13:14	ferg	New Issue
06-27-06 21:39	ferg	Note Added: 0001342
06-27-06 21:39	ferg	Assigned To	=> ferg
06-27-06 21:39	ferg	Status	new => closed
06-27-06 21:39	ferg	Resolution	open => fixed
06-27-06 21:39	ferg	Fixed in Version	=> 3.0.20

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