捕获“无法加载资源” < webview>中的HTML标签引起的错误 [英] Catching "Failed to load resources" errors caused by HTML tags in a <webview>

问题描述

我正在Chrome应用中加载网页网页浏览。

我有时在控制台中为某些< script> 和获得无法加载资源 < img> 标签。我想抓住这些错误，所以我可以用JavaScript代码对它们采取行动，而不是在控制台中显示消息。

我无法修改我正在加载的HTML ，即使用AJAX加载资源而不是HTML标签不是一个选项。 修复的资源也是不是我正在寻找的 - 我只是想要一些JavaScript代码在某个地方知道什么是丢失，并从那里采取。

我可以在代码中捕获这些错误，而不是在控制台中显示消息？

解决方案

您可以安装< webview> WebRequest API观察者，并查看每个资源负载的状态。
这样做不能捕获你看到的资源负载失败？

  var webview = document.querySelector（'webview'）; webview.request.onHeadersReceived.addListener（function（details）{if（details.statusLine.match（/ ^ HTTP。* 404 /）{// some 404 occurred ... window.console.log（'Failed url：'+ details.url）;} else if ...}，{urls：['< all_urls>']}）;  

/ p>

< webview> WebRequest API类似于 Chrome WebRequest API 。

I am loading web pages in Chrome App webviews.

I sometimes get "Failed to load resource" messages in the console for some of the <script> and <img> tags. I want to catch these errors so I can act on them in JavaScript code, rather than have messages appear in the console.

I can not modify the HTML that I am loading, i.e., using AJAX to load the resources rather than HTML tags is not an option. "Fixing" the resources is also not what I am looking for - I just want some JavaScript code somewhere to know what is missing and take it from there.

Can I catch these errors in code, rather than having messages appear in the console?

解决方案

You can install a <webview> WebRequest API observer and see each resource load's status. Does that not catch the resource load failures you're seeing?

var webview = document.querySelector('webview');

webview.request.onHeadersReceived.addListener(function(details) {
  if (details.statusLine.match(/^HTTP.*404/) {
    // some 404 happened...
    window.console.log('Failed url: ' + details.url);
  } else if ...
}, {urls: ['<all_urls>']});

The <webview> WebRequest API is similar to the Chrome WebRequest API.

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