如何檢查Rss供稿鏈接是否有效

Question

我想檢查提供的Rss供稿鏈接是否有效，是否正在工作？

Answer 1

只需加載URL並檢查它實際上是一個RSS源。下面的代碼

try { 
    var feedDoc = XDocument.Load(url); 
    return ValidateRss(feedDoc); // implementation left as an exercise for the reader. 
} 
catch(HttpException) { // perhaps others 
    return false; 
} 

Answer 2

用於檢查RSS網址：

using System.ServiceModel.Syndication; 

    public static bool IsValidFeedUrl(string url) 
    { 
     bool isValid = true; 
     try 
     { 
      XmlReader reader = XmlReader.Create(url); 
      Rss20FeedFormatter formatter = new Rss20FeedFormatter(); 
      formatter.ReadFrom(reader); 
      reader.Close(); 
     } 
     catch 
     { 
      isValid = false; 
     } 

     return isValid; 
    }