How to override Content-Type header when submitting task to task queue?

[AndyD]

First off, I'm new to App Engine task queues, and so I may just be going against the grain here.  Feel free to redirect me if that's the case.

What I'd like to do is queue a task and supply a JSON payload in the HTTP request to the handler

Here's what I'm trying...

    TaskOptions task = TaskOptions.Builder
        .withUrl("/mytaskhandler")
        .header("Content-Type", "application/json")
        .payload(jsonBody);
    QueueFactory.getDefaultQueue().add(task);

What I'm seeing is that this results in a request that has **both** of the following headers:
Content-Type:application/json 

and 

Content-Type:text/plain

That seems bogus, and it's confusing the REST library (Restlet) that I'm using to handle the request content negotiation.  Bug?

-AndyD

[Nicholas Verne]

Try using TaskOptions.payload(byte[] payload, java.Lang.String contentType)

TaskOptions task = TaskOptions.Builder
.withUrl("/mytaskhandler")

.payload(jsonBody.getBytes(), "application/json");
QueueFactory.getDefaultQueue().add(task);

Nick Verne

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[AndyD]

That did the trick, thanks!