什么是规范的方法在Ajax的请求来处理错误？ [英] What is the canonical way to handle errors during Ajax-requests?

问题描述

对于普通的请求，我们可以简单的注册一个＆LT;错误页＆GT; 在的web.xml 。然而，这并不适用于Ajax的请求。通过Ajax的请求期间默认的错误将导致在一个小弹出式窗口中，显示了异常浏览​​器

For normal requests we can simple register an <error-page> in web.xml. However, this does not apply to Ajax-requests. By default errors during an Ajax-request will result in a little pop-window in the browser that shows the exception.

主要的例子中，我挣扎正在处理 ViewExpiredException 以统一的方式。对于标准的要求，我重定向到一个网页，解释说没有登录用户，并提供了一​​个链接到登录页面。我想这样做的AJAX请求。似乎有几种方式：

The main example I am struggling with is handling a ViewExpiredException in a uniform way. For standard requests, I redirect to a page that explains that the user is not logged in and provides a link to the login-page. I would like to do the same for Ajax-requests. There seem to be several ways:

1. 我可以写一个处理错误的客户端，并重定向到错误页面的JavaScript功能。我将不得不添加此功能的每个＆LT; F：AJAX＆GT; -tag所有页面上的使用的onerror -attribute $ C $。有没有办法告诉JSF，我想有这样的JavaScript功能作为默认的错误处理所有＆LT; F：？AJAX＆GT; 标签都有效
2. 我可以使用自定义异常处理程序，如<一个描述href="http://weblogs.java.net/blog/edburns/archive/2009/09/03/dealing-gracefully-viewexpiredexception-jsf2"相对=nofollow>这个博客。这似乎做我想做的，但我不知道它是否是矫枉过正。有没有简单的解决方案？

1. I could write a javascript function that handles the error on the client-side and redirects to the error-page. I would then have to add this function every <f:ajax>-tag on all pages using the onerror-attribute. Is there a way to tell JSF that I want to have this javascript-function as the default error-handler for all <f:ajax>-tags?
2. I could use a custom exception-handler, as described in this blog. This seems to do what I want, but I wonder if it is overkill. Is there no simpler solution?

我的问题是，这是怎么应该是解决了吗？其中我列出的方法应使用？有没有我不知道的另一种方法？

So my question is, how is this supposed to be solved? Which of the approaches I listed should be used? Is there another approach that I do not know of?

推荐答案

您可以使用的 jsf.ajax.addOnError（） 设置默认错误处理程序。例如，

You can use jsf.ajax.addOnError() to set the default error handler. E.g.

jsf.ajax.addOnError(function(data) {
    alert(data.responseText);
});

又见 JSF2规范章13.3.6.2。你可以找到数据的所有属性在JSF2规范表14-4对象。

See also chapter 13.3.6.2 of the JSF2 spec. You can find all properties of data object in table 14-4 of the JSF2 spec.

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