KalpasWang/proxy.html

## proxy.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<!-- saved from url=(0043)http://www.jspatterns.com/book/7/proxy.html -->
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

	<title>Dave Matthews vids</title>
    <style>
        img {float: left; padding-right: 7px;}
        div {padding: 7px; border: 1px solid #ccc; background: #eee; width: 400px;}
        h2 {margin: 0;}
        span {text-decoration: underline; cursor: pointer;}
        body {padding: 21px; font-size: 105%; font-family: Helvetica;}
        input {margin-right: 7px;}
        a {color: blue;}
    </style>
</head>
<body cz-shortcut-listen="true">

<h1>Dave Matthews vids</h1>
<p><span id="toggle-all">Toggle Checked</span></p>
<ol id="vids">
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2158073">Gravedigger</a></li>
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--4472739">Save Me</a></li>
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--45286339">Crush</a></li>
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2144530">Don't Drink The Water</a></li>
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--217241800">Funny the Way It Is</a></li>
    <li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2144532">What Would You Say</a></li>
</ol>


<script>


var $ = function (id) {
    return document.getElementById(id);
};

var http = {
    makeRequest: function (ids, callback) {
        var url = 'http://query.yahooapis.com/v1/public/yql?q=',
            sql = 'select * from music.video.id where ids IN ("%ID%")',
            format = "format=json",
            handler = "callback=" + callback,
            script = document.createElement('script');

        sql = sql.replace('%ID%', ids.join('","'));
        sql = encodeURIComponent(sql);

        url += sql + '&' + format + '&' + handler;
        script.src = url;

        document.body.appendChild(script);
    }
};

var proxy = {
    ids: [],
    delay: 50,
    timeout: null,
    callback: null,
    context: null,
    makeRequest: function (id, callback, context) {

        // add to the queue
        this.ids.push(id);

        this.callback = callback;
        this.context  = context;

        // set up timeout
        if (!this.timeout) {
            this.timeout = setTimeout(function () {
                proxy.flush();
            }, this.delay);
        }
    },
    flush: function () {

        http.makeRequest(this.ids, "proxy.handler");

        // clear timeout and queue
        this.timeout = null;
        this.ids = [];

    },
    handler: function (data) {
        var i, max;

        // single video
        if (parseInt(data.query.count, 10) === 1) {
            proxy.callback.call(proxy.context, data.query.results.Video);
            return;
        }

        // multiple videos
        for (i = 0, max = data.query.results.Video.length; i < max; i += 1) {
            proxy.callback.call(proxy.context, data.query.results.Video[i]);
        }
    }
};


var videos = {
    getPlayer: function (id) {
        return '' +
        '<object width="400" height="255" id="uvp_fop" allowFullScreen="true">' +
            '<param name="movie" value="http://d.yimg.com/m/up/fop/embedflv/swf/fop.swf"\/>' +
            '<param name="flashVars" value="id=v' + id + '&amp;eID=1301797&amp;lang=us&amp;enableFullScreen=0&amp;shareEnable=1"\/>' +
            '<param name="wmode" value="transparent"\/>' +
            '<embed ' +
                'height="255" ' +
                'width="400" ' +
                'id="uvp_fop" ' +
                'allowFullScreen="true" ' +
                'src="http://d.yimg.com/m/up/fop/embedflv/swf/fop.swf" ' +
                'type="application/x-shockwave-flash" ' +
                'flashvars="id=v' + id  + '&amp;eID=1301797&amp;lang=us&amp;ympsc=4195329&amp;enableFullScreen=1&amp;shareEnable=1"' +
             '\/>' +
        '<\/object>';
    },

    updateList: function (data) {
        var id,
            html = '',
            info;

        if (data.query) {
            data = data.query.results.Video;
        }
        id = data.id;
        html += '<img src="' + data.Image[0].url + '" width="50" \/>';
        html += '<h2>' + data.title + '<\/h2>';
        html += '<p>' + data.copyrightYear + ', ' + data.label + '<\/p>';
        if (data.Album) {
            html += '<p>Album: ' + data.Album.Release.title + ', ' + data.Album.Release.releaseYear + '<br \/>';
        }
        html += '<p><a class="play" href="http://new.music.yahoo.com/videos/--' + id + '">&raquo; play<\/a><\/p>';
        info = document.createElement('div');
        info.id = "info" + id;
        info.innerHTML = html;
        $('v' + id).appendChild(info);

    },

    getInfo: function (id) {

        var info = $('info' + id);

        if (!info) {
            proxy.makeRequest(id, videos.updateList, videos);
            return;
        }

        if (info.style.display === "none") {
            info.style.display = '';
        } else {
            info.style.display = 'none';
        }
    }
};


$('vids').onclick = function (e) {
    var src, id;

    e = e || window.event;
    src = e.target || e.srcElement;

    if (src.nodeName.toUpperCase() !== "A") {
        return;
    }

    if (typeof e.preventDefault === "function") {
        e.preventDefault();
    }
    e.returnValue = false;

    id = src.href.split('--')[1];

    if (src.className === "play") {
        src.parentNode.innerHTML = videos.getPlayer(id);
        return;
    }

    src.parentNode.id = "v" + id;
    videos.getInfo(id);
};

$('toggle-all').onclick = function (e) {

    var hrefs,
        i,
        max,
        id;

    hrefs = $('vids').getElementsByTagName('a');
    for (i = 0, max = hrefs.length; i < max; i += 1) {
        // skip play links
        if (hrefs[i].className === "play") {
            continue;
        }
        // skip unchecked
        if (!hrefs[i].parentNode.firstChild.checked) {
            continue;
        }

        id = hrefs[i].href.split('--')[1];
        hrefs[i].parentNode.id = "v" + id;
        videos.getInfo(id);
    }
};

</script>


<div class="xl-chrome-ext-bar" id="xl_chrome_ext_{4DB361DE-01F7-4376-B494-639E489D19ED}" style="display: none;">
      <div class="xl-chrome-ext-bar__logo"></div>

      <a id="xl_chrome_ext_download" href="javascript:;" class="xl-chrome-ext-bar__option">下载视频</a>
      <a id="xl_chrome_ext_close" href="javascript:;" class="xl-chrome-ext-bar__close"></a>
    </div></body></html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	<!-- saved from url=(0043)http://www.jspatterns.com/book/7/proxy.html -->
	<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

	<title>Dave Matthews vids</title>
	<style>
	img {float: left; padding-right: 7px;}
	div {padding: 7px; border: 1px solid #ccc; background: #eee; width: 400px;}
	h2 {margin: 0;}
	span {text-decoration: underline; cursor: pointer;}
	body {padding: 21px; font-size: 105%; font-family: Helvetica;}
	input {margin-right: 7px;}
	a {color: blue;}
	</style>
	</head>
	<body cz-shortcut-listen="true">

	<h1>Dave Matthews vids</h1>
	<p><span id="toggle-all">Toggle Checked</span></p>
	<ol id="vids">
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2158073">Gravedigger</a></li>
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--4472739">Save Me</a></li>
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--45286339">Crush</a></li>
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2144530">Don't Drink The Water</a></li>
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--217241800">Funny the Way It Is</a></li>
	<li><input type="checkbox" checked=""><a href="http://new.music.yahoo.com/videos/--2144532">What Would You Say</a></li>
	</ol>



	<script>


	var $ = function (id) {
	return document.getElementById(id);
	};

	var http = {
	makeRequest: function (ids, callback) {
	var url = 'http://query.yahooapis.com/v1/public/yql?q=',
	sql = 'select * from music.video.id where ids IN ("%ID%")',
	format = "format=json",
	handler = "callback=" + callback,
	script = document.createElement('script');

	sql = sql.replace('%ID%', ids.join('","'));
	sql = encodeURIComponent(sql);

	url += sql + '&' + format + '&' + handler;
	script.src = url;

	document.body.appendChild(script);
	}
	};

	var proxy = {
	ids: [],
	delay: 50,
	timeout: null,
	callback: null,
	context: null,
	makeRequest: function (id, callback, context) {

	// add to the queue
	this.ids.push(id);

	this.callback = callback;
	this.context = context;

	// set up timeout
	if (!this.timeout) {
	this.timeout = setTimeout(function () {
	proxy.flush();
	}, this.delay);
	}
	},
	flush: function () {

	http.makeRequest(this.ids, "proxy.handler");

	// clear timeout and queue
	this.timeout = null;
	this.ids = [];

	},
	handler: function (data) {
	var i, max;

	// single video
	if (parseInt(data.query.count, 10) === 1) {
	proxy.callback.call(proxy.context, data.query.results.Video);
	return;
	}

	// multiple videos
	for (i = 0, max = data.query.results.Video.length; i < max; i += 1) {
	proxy.callback.call(proxy.context, data.query.results.Video[i]);
	}
	}
	};


	var videos = {
	getPlayer: function (id) {
	return '' +
	'<object width="400" height="255" id="uvp_fop" allowFullScreen="true">' +
	'<param name="movie" value="http://d.yimg.com/m/up/fop/embedflv/swf/fop.swf"\/>' +
	'<param name="flashVars" value="id=v' + id + '&eID=1301797&lang=us&enableFullScreen=0&shareEnable=1"\/>' +
	'<param name="wmode" value="transparent"\/>' +
	'<embed ' +
	'height="255" ' +
	'width="400" ' +
	'id="uvp_fop" ' +
	'allowFullScreen="true" ' +
	'src="http://d.yimg.com/m/up/fop/embedflv/swf/fop.swf" ' +
	'type="application/x-shockwave-flash" ' +
	'flashvars="id=v' + id + '&eID=1301797&lang=us&ympsc=4195329&enableFullScreen=1&shareEnable=1"' +
	'\/>' +
	'<\/object>';
	},

	updateList: function (data) {
	var id,
	html = '',
	info;

	if (data.query) {
	data = data.query.results.Video;
	}
	id = data.id;
	html += '<img src="' + data.Image[0].url + '" width="50" \/>';
	html += '<h2>' + data.title + '<\/h2>';
	html += '<p>' + data.copyrightYear + ', ' + data.label + '<\/p>';
	if (data.Album) {
	html += '<p>Album: ' + data.Album.Release.title + ', ' + data.Album.Release.releaseYear + '<br \/>';
	}
	html += '<p><a class="play" href="http://new.music.yahoo.com/videos/--' + id + '">» play<\/a><\/p>';
	info = document.createElement('div');
	info.id = "info" + id;
	info.innerHTML = html;
	$('v' + id).appendChild(info);

	},

	getInfo: function (id) {

	var info = $('info' + id);

	if (!info) {
	proxy.makeRequest(id, videos.updateList, videos);
	return;
	}

	if (info.style.display === "none") {
	info.style.display = '';
	} else {
	info.style.display = 'none';
	}
	}
	};


	$('vids').onclick = function (e) {
	var src, id;

	e = e \|\| window.event;
	src = e.target \|\| e.srcElement;

	if (src.nodeName.toUpperCase() !== "A") {
	return;
	}

	if (typeof e.preventDefault === "function") {
	e.preventDefault();
	}
	e.returnValue = false;

	id = src.href.split('--')[1];

	if (src.className === "play") {
	src.parentNode.innerHTML = videos.getPlayer(id);
	return;
	}

	src.parentNode.id = "v" + id;
	videos.getInfo(id);
	};

	$('toggle-all').onclick = function (e) {

	var hrefs,
	i,
	max,
	id;

	hrefs = $('vids').getElementsByTagName('a');
	for (i = 0, max = hrefs.length; i < max; i += 1) {
	// skip play links
	if (hrefs[i].className === "play") {
	continue;
	}
	// skip unchecked
	if (!hrefs[i].parentNode.firstChild.checked) {
	continue;
	}

	id = hrefs[i].href.split('--')[1];
	hrefs[i].parentNode.id = "v" + id;
	videos.getInfo(id);
	}
	};

	</script>




	<div class="xl-chrome-ext-bar" id="xl_chrome_ext_{4DB361DE-01F7-4376-B494-639E489D19ED}" style="display: none;">
	<div class="xl-chrome-ext-bar__logo"></div>

	<a id="xl_chrome_ext_download" href="javascript:;" class="xl-chrome-ext-bar__option">下载视频</a>
	<a id="xl_chrome_ext_close" href="javascript:;" class="xl-chrome-ext-bar__close"></a>
	</div></body></html>