I'm using this and it doesn't work as expected. I'm trying to cache bust a css file as it changes a lot and we can't always expect users to thoroughly clear their cache.
<c:set var="buster" value="{System.currentTimeMillis()}" />
<af:resource type="css" source="/oracle/webcenter/portalapp/shared/css/maaui.css?r=${buster}"/>
Unfortunately that renders
<link rel="stylesheet" type="text/css" afrres="true" href="/myAccount/oracle/webcenter/portalapp/shared/css/maaui.css?r=%7BSystem.currentTimeMillis()%7D">
It doesn't execute the method. I tried ${} and #{} as well and neither seem to work for me.
Can anyone help me to achieve the desired result? Basically a random string that will change each time a user visits a page. I can easily do this in .NET but I am very new to Oracle ADF.
Try
<c:set var="buster" value="{myBean.time}" />
<af:resource type="css" source="/oracle/webcenter/portalapp/shared/css/maaui.css?r=#{buster}"/>
And in MyBean managed backing bean
public long getTime()
{
return System.getCurrentTimeMillis();
}
Related
I'm making a simple servlet app, which is supposed to produce the same output for the following URL patterns:
#WebServlet(urlPatterns={"/Start", "/Start/*", "/Startup", "/Startup/*"})
The output for the following addresses is correct:
http://localhost:4413/TestA/Startup
http://localhost:4413/TestA/Start
http://localhost:4413/TestA
However, once I try something like this:
http://localhost:4413/TestA/Startup/
or
http://localhost:4413/TestA/Startup/blablabla
The css file does not see it.
What could be wrong here?
The css links are of the form:
<link rel="StyleSheet" href="res/mc.css" type="text/css" title="cse4413" media="screen, print"/>
This depends on how you have included the CSS file. If you had included like:
<link href="css/style.css" />
Then, it won't work on directory structures. So change your code, which is similar to the above one like this:
<link href="/css/style.css" />
You need to provide the relative path to the domain, not the file. So that it always requests the right URL.
Solved the problem by setting href to
href="${pageContext.request.contextPath}/res/mc.css"
Could anyone explain how is this different from a link of the form
project/WebContent/res/mc.css?
My greetings!
The question is pretty short: is there any way to change the decorator during runtime? For example, I have a dropdown menu with some "decorator styles", so when the user chooses different style, it will change the decorator.
If you have any useful links on this topic, I'd be very grateful.
Found this thread - SiteMesh: Changing the content-type of the response - but still, no help.
I know you can use a meta HTML tag to specify which decorator you want to use with your JSP files. For example in the file login.jsp where I need the login decorator:
<head>
<meta name="decorator" content="login" />
<!-- where "login" is the name of the decorator -->
</head>
So, I never tried yet, but you could probably give the name of the decorator through a POST or a GET parameter, and using it within the meta tag:
<meta name="decorator" content="${decoratorName}" />
What is the best way of obtaining context-root on a jsp page. If I hardcode my css/image to "/myapp/images/foo.gif" then it will be a broken link if the context root / app name is changed. Using relative path is not always preferrable because a context root can be multi-path (eg: /mysite/myapp)
So far I've tried using <c:url var="root" value="/"/> which works alright (${root} will give the context-root /myapp/), however if this is the very first time user is visiting the site (or if cookie is cleaned on the browser), the value assigned to ${root} became something like /myapp/;jsessionid=019762g1hk3781kh98uihilho and it breaks the images/css reference. Is there any other better way than this?
So far I've tried using <c:url var="root" value="/"/> which works alright (${root} will give the context-root /myapp/)
This is not the right way. The <c:url> should be applied on every single URL individually.
You'd better use
<c:set var="root" value="${pageContext.request.contextPath}" />
See also:
Browser can't access/find relative resources like CSS, images and links when calling a Servlet which forwards to a JSP
I've been using Play 2.0 framework for a couple of days now for a proof of concept application at my job. One of the first things I wanted to check out was the custom tag functionality, since it reminded me of HtmlHelpers in ASP.Net MVC. The thing is that I can't seem to make them work and was wondering if I'm misusing the feature or misunderstanding something.
Here's a simple example of what I want to do: I want to be able to use #script("scriptname.js") anywhere in the templates and have that subsitute the entire tags.
Here's what I got so far:
main.scala.html
#(title: String, scripts: Html = Html(""))(content: Html)
#import tags._
<!DOCTYPE html>
<html>
<head>
<!-- this is how I would like to use the helper/tag -->
#script("jquery.js")
#script("jquery-ui.js")
<!-- let views add their own scripts. this part is working OK -->
#scripts
</head>
<body>
#content
</body>
</html>
I created a subdirectory called "tags" under the app/views directory. There I created my script.scala.html tag/helper file:
#(name: String)
<script src="#routes.Assets.at("javascripts/#name")" type="text/javascript"></script>
The problem I'm having is that whenever I use #script() the output includes the #name parameter in it. For example #script("x.js") actually outputs
<script src="assets/javascripts/#name" type="text/javascript"></script>
What am I doing wrong?
For the record, I did read the documentation and search here, but neither of these links have helped me figure this out:
http://www.playframework.org/documentation/2.0.3/JavaTemplateUseCases
How to define a tag with Play 2.0?
#routes.Assets.at(...) evaluates the Scala expression routes.Assets.at(...) and substitutes the result into your output. There is no recursive evaluation that would allow you to have evaluate an expression textually to get that expression, which seems to be what you're expecting.
What you intend to do is achieved using
#routes.Assets.at("javascripts/" + name)
Do anyone know how to put Google adsense ads inside a GWT web application?
You can put the javascript-code from Adsense in the single HTML page that GWT starts with. This way the advertising will not be displayed in the same area as GTW but above/below the GWT code. For advertising that could be ok.
This example places a baner above the application:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>www.javaoracleblog.com</title>
<script type="text/javascript" language="javascript" src="com.javaoracleblog.aggregator.nocache.js"></script>
</head>
<body>
<script type="text/javascript"..
ADsense code here
</script>
<!-- OPTIONAL: include this if you want history support -->
<iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>
</body>
</html>
In order to indicate to Google WT that the site of Google adsense can be trusted you need to add a regex matching URL to the -whitelist command line argument.
Note that this will probably not solve the problems desribed in the above "Why I dumped GWT" article.
According to this thread on AdSense:
Short version, you can't use Adsense
via Ajax without breaking the
programme policies/t&c's
Long version...
Ad code passed through an xmlhttp call
is not rendered, it's just treated as
text (hence, responseText). The only
way to execute js code is to use
"responseXML" coupled with the
"exec()" command.
For instance...
If your xml contains something along
the lines of:
This is the
content from the external
file javascript code
goes here
You would assign a variable (called
page_data for instance) using
ajax_obj.responseXML, run the XML
through a parser and run
exec(js variable or line from XML
here);
Not really helpful from an Adsense
standpoint, but that's how it's done.
It's also worth mentioning Why I dumped GWT:
Another problem were my adsense
banners. Since I didn’t have a lot of
content on the page, the banners were
sometimes off topic. An even bigger
problem was that the banners stayed
the same when people searched for
different keywords (since the ajax
refresh didn’t trigger an adsense
refresh). I solved this by doing the
search with a page refresh instead of
an ajax call. The ajax part of the
site was limited to sorting, faceting,
i18n and displaying tips.
You might check out the interview I did with InfoQ. It includes a sample chapter from my book and it happens to be on SEO.
It's not trivial, but I think the solutions in the chapter let GWT work nicely in an environment where SEO is important. The basic solution is to implement something I call 'bootstrapping'. This means that your pages take the info that would normally come across in GWT-RPC requests and serialize them into the page. The GWT widget then loads this information without an RPC request. While your page serializes the info into JavaScript, it's easy to also write a <noscript> to the page that can be used for SEO.
Take a look at the PDF included here: InfoQ GWT it goes into all the detail. The whole sample project is here: google code with source on github.
If you really want AdSense to be kinda "inside" GWT I'd use the Frame widget. Basically the Frame widget generates an <iframe ...> inside your GWT code. First I've thought iframe, UGH! But the <iframe> tag is still part of the HTML5 spec and has been even extended by some attributes that seem to be there for exactly this "sandboxing" purpose. And with corresponding CSS styling you will not have any scrollbars around your <iframe>.
And here is the actual solution:
You should put
<ui:style>
.sponsor {
border: 0em;
width: 20em;
height: 6em;
float: right;
display: inline;
}
</ui:style>
<g:HTMLPanel>
<g:Frame ui:field="sponsor" url="issue/extern/Google-AdSense.html" styleName="{style.sponsor}"/>
</g:HTMLPanel>
into your .ui.xml file and the logic into the corresponding .java file:
#UiField
Frame sponsor;
Also you should put the actual Google AdSense code (the <script> stuff) into a separate HTML file inside GWT's public folder which is - in this case - called Google-AdSense.html and is located inside the extern folder inside the public folder. issue (in the Frame url attribute) is in this case the GWT output folder.
And here is how it looks like: The ad in the upper right corner.
Btw this is also the way to embed the Google Analytics code into GWT.
Here is how I do it. I have a demo and source code here: http://code.google.com/p/gwt-examples/wiki/DemoGwtAdsene
You can use AdSense and GWT together without using frames or other hacks if you take some care in how you create your host pages.
The key is to include your AdSense code in the host page and then to manipulate the dom element containing the ad but to not detach it from the page. So you can reposition the ads into the body of your other gwt code as long as the dom structure is not changed.
If you do detach and reattach the containing dom element then it will appear to work in Chrome and Firefox but IE will show a blank space. I tried initially to move the ads DIV element into a DockLayoutPanel and thought everything was great until I belatedly tested it in IE.
So this is OK:
Element element = Document.get().getElmentById("ad");
element.getStyle().setPosition(ABSOLUTE);
element.getStyle().setTop(20, PX);
But this is not:
myPanel.add(ElementWrapper.wrap(element));
because adding a widget to another widget re-parents it.
This means that you cannot use any of the built-in LayoutPanel stuff to hold your ad div because Layout cannot wrap an existing element (It creates its own DIV in its constructor). You may be able to modify the layout panel stuff so it wraps an element and does not re-parent it... but I have not tried this yet.
I've tested the results in IE6+, Chrome and Firefox. Downside is that you cannot refresh the ads unless you load a new page. But in my case GWT was used to enhance html pages so that was not an issue. In any case... are users more likely to click on a different ad than one they read several times? Not sure it is so vital.
I could do this using DFP Small Business + Async Publisher tag + AdSense integration:
Here is the code:
On of your host page, put your publisher tag, something like:
<head>
<script type="text/javascript" src="http://www.googletagservices.com/tag/js/gpt.js"></script>
<script type="text/javascript">
var slot1 = googletag.defineUnit('/XXXX/ca-pub-YYYYYYYYYYYYYYY/transaction', [468, 60], 'div-gpt-ad-ZZZZZZZ-0').addService(googletag.pubads());
googletag.pubads().enableSingleRequest();
googletag.enableServices();
</script>
...
</head>
I've created a view with uiBinder, with a div with the id specified at the head, like this:
<g:HTMLPanel height="62px" width="100%">
<div id='div-gpt-ad-ZZZZZZZ-0' style='width:470px; height:60px;'>
</div>
</g:HTMLPanel>
On the onLoad() method of the view, you initialize the ad, like this:
#Override
protected void onLoad() {
setupAd();
}
public static native void setupAd() /*-{
$wnd.googletag.cmd.push(function() {$wnd.googletag.display('div-gpt-ad-ZZZZZZZ-0')});
}-*/;
To refresh the ad, just call refresh ad for the slot specified at head:
public static native void refreshAd() /*-{
$wnd.googletag.pubads().refresh([$wnd.slot1]);
}-*/;
That's all!
For more information about the publisher tag, check:
http://support.google.com/dfp_sb/bin/answer.py?hl=en&answer=1649768
Now I'm struggling to know how to make AdSense bot to craw my ajax application. I've implemented the Ajax Crawling scheme:
https://developers.google.com/webmasters/ajax-crawling/docs/getting-started
But I've got the information from AdSense forum that the AdSense bot (Mediapartners-Google) doesn't work with "escaped fragment" Ajax scheme.
Does anybody know if Google plan to make any progress on that?
This limits this approach to serve just interest based ads, since the context based ad serving depends on ajax crawling scheme.
Google's AdSense bot crawls your page to determine what ads to serve. Therefore, you should not put AdSense on pages with mostly dynamic content. It won't work well.
Maybe you should look into other ad programs?