http/tests/inspector/extensions-headers.html

<html>
<head>
<script src="inspector-test.js"></script>
<script src="extensions-test.js"></script>
<script type="text/javascript">

function extension_testAddHeaders(nextTest)
{
    webInspector.network.addRequestHeaders({
        "x-webinspector-extension": "test",
        "user-agent": "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 6.0)"
    });
    function cleanUpHeaders()
    {
        webInspector.network.addRequestHeaders({
            "x-webinspector-extension": null,
            "user-agent": null
        });
    }
    webInspector.inspectedWindow.eval("doXHR()", callbackAndNextTest(cleanUpHeaders, nextTest));
}

function doXHR()
{
    var xhr = new XMLHttpRequest();
    xhr.open("GET", "resources/echo-headers.php", false);
    xhr.send(null);
    // Can't use output() here due to output order instability: this is invoked by inspectedWindow.eval(),
    // which is not serialized against output from extension, as the latter is posted asynchronously via
    // postMessage to front-end window.
    document.getElementById("headers").textContent += xhr.responseText;
}

</script>
</head>
<body onload="runTest()">
<p>Tests WebInspector extension API</p>
<div style="white-space: pre" id="headers"></div>
</body>
</html>