java Wicket：相对于绝对 URL 或获取基本 URL
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Wicket: Relative to absolute URL or get base URL
提问by Gilean
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.
如果我有静态资产 (flash/blah.swf) 的相对路径，以编程方式将其转换为绝对 URL ( http://localhost/app/flash/blah.swf)的最佳方法是什么？或者获取 Wicket 应用程序基本 URL 的最佳方法是什么？我试过使用 RequestUtils.toAbsolutePath 但它似乎不能可靠地工作并且经常抛出异常。这需要在应用程序部署到的所有服务器上工作。
采纳答案by Richard Noble
RequestUtils.toAbsolutePath(RequestCycle.get().getRequest().
getRelativePathPrefixToWicketHandler());
worked for me.
对我来说有效。
回答by Manuel Manhart
For Wicket 6 it is
对于 Wicket 6，它是
String absoluteUrl = RequestCycle.get().getUrlRenderer().renderFullUrl(Url.parse("my-relative-url.html"));
回答by Don Roby
org.apache.wicket.protocol.http.servlet.ServletWebRequesthas a method getRelativePathPrefixToContextRoot()(actually defined as abstract in a superclass).
org.apache.wicket.protocol.http.servlet.ServletWebRequest有一个方法getRelativePathPrefixToContextRoot()（实际上在超类中定义为抽象）。
A standard idiom for using it is
使用它的标准习语是
RequestCycle.get().getRequest().getRelativePathPrefixToContextRoot() + location;
回答by Gilean
I ended up using something like this after adding a base_urlproperty to my MyApplicationclass that extends the wicket application.
在向base_url我的MyApplication类添加一个扩展检票口应用程序的属性后，我最终使用了这样的东西。
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));
