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how-to obtain attachment data via OSLC

Scott Russell (4688) | asked Sep 07 '11, 3:14 p.m.
I'm trying to write a utility to fix-up work items after a export->import migration from one RTC system to another. But when I process attachments I am unable to obtain the actual attachment data (re: <rtc_cm> ) via the obtained rdf:resource reference.

When I do a get on the rdf:resource URI instead of the content data, I get HTML with the text:
"You have followed a direct link to content hosted in a Jazz server. This page has been presented to ensure that a malicious website cannot use cleverly crafted content to circumvent security. If you would like to access the content, please use the link below."

Anyone know what I maybe doing wrong or a way around the injected HTML?

public String getAttachmentDataByReference( TeamConcertRepository repo, WorkItemAttachment wia )
StringBuffer data = new StringBuffer( ">>>no data retreived<<<" );
String dataReference = wia.getContentReference();
GetMethod method = new GetMethod( dataReference );
method.addRequestHeader( "Accept", wia.getFormat() );
method.addRequestHeader( "Content-type", wia.getFormat() );
method.setFollowRedirects( true );
int statusCode;
statusCode = repo.getClient().executeMethod( method );
System.err.println( "status from get is[" + statusCode + "]" );
InputStream stream = method.getResponseBodyAsStream();

Thanks in advance!

Mike Shkolnik commented Nov 07 '13, 6:55 p.m.

Scott, did you ever get this problem resolved? I am getting the same error.

Scott Russell commented Nov 11 '13, 10:39 a.m.

I personally never found a way but right after we did our migration I was in contact with someone who said they were able to do it. They added:

addHeader("X-Jazz-CSRF-Prevent", holyGrail);

where holyGrail = the session id in your JSESSIONID. 

One answer

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Ralph Schoon (63.1k33646) | answered Nov 08 '13, 8:08 a.m.
edited Nov 08 '13, 8:08 a.m.
As far as I am aware, there is no officially supported and documented way to download attachments with OSLC/REST. We had the situation several times in the past and the developers suggested to use the API instead as described here:

Having said that, I am aware some users have traced the communication during a download and were able to rebuild the mechanism.

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