quicktime_movie_download.js

// ==UserScript==
// @name Quicktime Movie Download
// @include http://*
// ==/UserScript==
(function() {

function evaluate(xpath, context) {
    var eles = document.evaluate(xpath, context || document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    var arr = [];
    for (var i = 0, len = eles.snapshotLength; i < len; i++) {
        arr.push(eles.snapshotItem(i));
    }
    return arr;
}

function download(e) {
    if (typeof btoa == 'undefined') return; // Opera 10.50 or later.
    var href = e.currentTarget.href;
    if (/\.mov$/i.test(href)) {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', e.currentTarget.href, false);
        xhr.overrideMimeType('text/plain; charset=x-user-defined');
        xhr.send(null);
        if (xhr.responseText && xhr.responseText.length < 1000) {
            var str = encodeURI(xhr.responseText).replace(/%[0-9A-Za-z]{2}/g, ' ');
            var m = /(\S*\.m4[va])\b/.exec(str);
            if (m) {
                e.preventDefault();
                location.href = m[1];
            }
        }
    }
}

function doHogeHoge(target) {
    var objects = evaluate('descendant-or-self::object[@type="video/quicktime" or @classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"]', target);
    if (objects.length == 0) {
        return;
    }
    for (var i = 0; i < objects.length; i++) {
        var obj = objects[i];
        var params = evaluate('param[@name="src" and @value]', obj);
        if (params.length > 0) {
            var link = document.createElement('a');
            link.href = params[0].value;
            link.textContent = 'movie';
            link.target = '_blank';
            link.addEventListener('click', download, false);
            obj.parentNode.insertBefore(link, obj);
        }
    }
}

function main() {
    if (!document.body) return;
    doHogeHoge(document.body);
    document.addEventListener('DOMNodeInserted', function(e) {
        document.removeEventListener('DOMNodeInserted', arguments.callee, false);
        doHogeHoge(e.target);
        document.addEventListener('DOMNodeInserted', arguments.callee, false);
    }, false);
}
document.addEventListener('DOMContentLoaded', main, false);
})()