从C＃或AngularJS中的另一个URL获取数据(Getting Data from another URL in C# or AngularJS)

从C＃或AngularJS中的另一个URL获取数据(Getting Data from another URL in C# or AngularJS)

我需要来自另一个Hadoop API URL的数据。 但是我只能得到没有数据的HTML源代码。 我正在使用下面的代码。

using (var client = new WebClient()) { String downloadedString = client.DownloadString("http:........"); }

实际结果：

<tr><th> Configured Capacity:</th><td> *{Total|fmt_bytes}* </td></tr>

期望

<tr><th> Configured Capacity:</th><td> 55 </td></tr>

我需要55我的C＃代码。

我的期望可能吗？ 如果是这样，请指导我。

I need data from another Hadoop API URL. But I only get the HTML source code without the data. I am using the following code.

using (var client = new WebClient()) { String downloadedString = client.DownloadString("http:........"); }

Actual Result:

<tr><th> Configured Capacity:</th><td> *{Total|fmt_bytes}* </td></tr>

Expectation

<tr><th> Configured Capacity:</th><td> 55 </td></tr>

I need 55 in my c# code.

Is my expectation possible? If so, please guide me.

最满意答案

您看到的问题是您的C＃客户端不运行Javascript，这是从Hadoop网络服务器将该值加载到占位符{Total|fmt_bytes}

也可以用cURL显示

$ curl -s http://hadoop-nn1:50070/dfshealth.html#tab-overview | grep Configured
  <tr><th> Configured Capacity:</th><td>{Total|fmt_bytes}</td></tr>
      <th>Configured Capacity</th>
 
 所以这不是Hadoop问题。 这是你的WebClient ...你需要使用Selenum WebDriver或PhantomJS。 
The issue you are seeing is that your C# client does not run Javascript, which is what is loading that value from the Hadoop webserver into the placeholder of {Total|fmt_bytes}
 
Also showable with cURL
 
$ curl -s http://hadoop-nn1:50070/dfshealth.html#tab-overview | grep Configured
  <tr><th> Configured Capacity:</th><td>{Total|fmt_bytes}</td></tr>
      <th>Configured Capacity</th>
 
So this is not a Hadoop problem. It's your WebClient... You need to use something like Selenum WebDriver or PhantomJS instead.