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Editorial Team
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Asked: 2026-06-03T03:42:20+00:00

After I updated the GWT version on 2.4.0 and the GAE version on 1.6.2

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After I updated the GWT version on 2.4.0 and the GAE version on 1.6.2 the com.google.gwt.user.client.ui.FormPanel does not submit the jSessionId anymore. I discovered this bug when I tried to get the HttpSession (request.getSession(false)) in the servlet-doPost-method which now returns null.
In my deployed version on appspot.com the app is still working. So I analyzed the post-request with the chrome development tools and detect that the jSessionId is not be submitted by the FormPanel:

Development Mode:

Request     URL:http://halligalli:8888/_ah/upload/ahJtcDNzdHJlYW1pbmdwbGF5ZXJyGwsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxhHDA
Request Method:POST
Status Code:302 Found
Request Headersview source
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:7181438
Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryB1bDbQ8YLCAabTG5
Host:halligalli:8888
Origin:http://127.0.0.1:8888
Referer:http://127.0.0.1:8888/Mp3Streaming.html?gwt.codesvr=127.0.0.1:9997
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7
Request Payload
------WebKitFormBoundaryB1bDbQ8YLCAabTG5
Content-Disposition: form-data; name="newBlob"; filename="09Anything new.mp3"
Content-Type: audio/mp3

Deployed Version:

Request URL:http://***.appspot.com/_ah/upload/AMmfu6ZrLfT_jYLHJKBXRoWX9_DeeYoa3Ob-vY0bbOcAJ3bj9ihT7Wp5yPmM3yjhn2RBpJAE8Pr7fIA8O-rhY8k0ARTy7hyU3GU3Qw4WrTHvXcSJ9mXZndA/ALBNUaYAAAAATyp8A-H7HSFTkl5ekVfXgXOmd3gK2PQ3/
Request Method:POST
Status Code:302 Found
Request Headersview source
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:7181438
Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryXy11Yxjeo1JfdJdq
Cookie:JSESSIONID=KOiv4hx1rqIJ1aZdP8CufQ ◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄HERE IS THE DIFFERENCE
Host:***.appspot.com
Origin:http://***.appspot.com
Referer:http://***.appspot.com/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7
Request Payload
------WebKitFormBoundaryXy11Yxjeo1JfdJdq
Content-Disposition: form-data; name="newBlob"; filename="09Anything new.mp3"
Content-Type: audio/mp3

I am using the FormPanel to upload files which will be stored in the GAE Blobstore and I need the session object to get the owner of the uploaded file (every other RPC in the development mode contains the jSessionId).
Any suggestions?

Thanking you in anticipation!

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1 Answer

  1. Editorial Team

    From your failing request:

    Request     URL:http://halligalli:8888/_ah/upload/ahJtcDNzdHJlYW1pbmdwbGF5ZXJyGwsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxhHDA
[…]
Host:halligalli:8888
Origin:http://127.0.0.1:8888
Referer:http://127.0.0.1:8888/Mp3Streaming.html?gwt.codesvr=127.0.0.1:9997

    You’re not sending the request to the same origin: your browser doesn’t send to halligalli a cookie that has been set for 127.0.0.1.

    As far as I can tell, this is a limitation of the BlobstoreService in the dev environment. See GWT Blobstore error calling createUploadUrl()

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