Streaming PDF via invocation of HTTPHandler using $.get into object element

What I am trying to do is invoke an HTTPHandler via the $.get method of jQuery which will stream back a PDF and display it in a web page using an object element. My previous method of setting the src attribute of an IFrame to be the result of a handler invocation works, but I would like cross-browser completion notification, so have moved to using $.get(). Sample code:

    function buttonClick() {

        $.get("/PDFHandler.ashx", {},

            function(data, textStatus, XMLHttpRequest) {
                var pdfObjectString = "<object data='' type='application/pdf' width='600' height='600'></object>";
                var pdfObject = $(pdfObjectString);
                pdfObject.attr("data", data);
                $("#container").append(pdfObject);
            });

As you can see, I am attempting to stick the 'data' variable into an object element. This is not working (no error, PDF just doesn't display), presumably because 开发者_如何学Cthe data that comes back is binary, yet the attr() method expects a string (I think).

My question is thus: how can I invoke an HTTPHandler via $.get and somehow assign the data from the callback to the data attribute of an object?

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Based on this question: How to open a file using JavaScript? I was able to work out a solution. Essentially you call the handler again in the success callback function. I couldn't get it working with an <object> tag (still using an IFrame) but it is good enough for what I need.

For this to work the HTTP handler must be caching the results, otherwise it just gets invoked again.

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I have struggled for hours to have something like this work, and this has been my very simple solution that works perfectly:

1. On the browser side, I have an iFrame contained in a DIV tag, but can be anywhere you want. You can change iFrame attributes to hide / show it on need basis.

<div id = "divpayframe">
<iframe name="payframe" id="payframe" width="600" height="800" frameborder="0"></iframe>
</div>

2. I also have a form that uses the normal submit to the server, but specifies the target as iFrame.

<form id="frmpayslip" method="post" action="/payslip" target="payframe">

3. The server returns a pdf stream and sets the response content type to application/pdf. See below code (Written in Delphi)

   Var S: TMemoryStream;

   //Some code generate the pdf file on the server side and convert it to a pdf file stream //Assign the stream to the variable S and set the Response to return the stream

   Response.ContentType := 'application/pdf'; Response.SendStream(S);

Note, no custom headers required for this unless you want to send it as attachment instead, in which case you can send 'Content-Disposition','attachment; filename="payslip.pdf"' to achieve the same result.