If I have a relative path to a static asset (flash/blah.swf), what is the best way to programmatically convert this to an absolute URL (http://localhost/app/flash/blah.swf)? Or what is the best way to get the base URL of the Wicket application? I've tried using RequestUtils.toAbsolutePath but it doesn't seem to work reliably and is frequently throwing exceptions. This needs to work on all servers the app is deployed to.
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5 Answers
For Wicket 6 it is
String absoluteUrl = RequestCycle.get().getUrlRenderer().renderFullUrl(Url.parse("my-relative-url.html")); 
1 Comment
Brad M
And base URL is
String baseUrl = RequestCycle.get().getUrlRenderer().getBaseUrl().toString()RequestUtils.toAbsolutePath(RequestCycle.get().getRequest(). getRelativePathPrefixToWicketHandler()); worked for me.
1 Comment
Duncan McGregor
Note that this doesn't work in Wicket 1.5, which has no single arg
toAbsolutePathFor Wicket 1.5 there is information here
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org.apache.wicket.protocol.http.servlet.ServletWebRequest has a method getRelativePathPrefixToContextRoot() (actually defined as abstract in a superclass).
A standard idiom for using it is
RequestCycle.get().getRequest().getRelativePathPrefixToContextRoot() + location; Comments
I ended up using something like this after adding a base_url property to my MyApplication class that extends the wicket application.
MyApplication app = (MyApplication)getApplication(); String appBaseUrl = app.getBaseUrl(); if (StringUtils.isEmpty(appBaseUrl)) { appBaseUrl = RequestUtils.toAbsolutePath(urlFor(app.getHomePage(), new PageParameters()).toString()); app.setBaseUrl(appBaseUrl); } // Add base URL to <script wicket:id="base_url"></script> to use with Flash add(new Label("base_url", "base_url = \"" + appBaseUrl + "\";").setEscapeModelStrings(false));