c# - 以编程方式取消订阅 YouTube 用户 C#

Question

这是我正在制作的大规模取消订阅者的代码，目前一切正常 - 除了取消订阅功能..（典型的呵呵）

   public void UnSubUsers()
   {
        string feedUrl = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions";
        YouTubeQuery query = new YouTubeQuery(feedUrl);
        subFeed = service.GetSubscriptions(query);
        YouTubeRequestSettings yts = new YouTubeRequestSettings("Unsubscriber", DEVKEY, username.Text, password.Text);
        YouTubeRequest request = new YouTubeRequest(yts);
        int i = 0;
        int x = 0;
        x = (listBox1.Items.Count);
        for (i=0;i<x ;i++ )
        {
            string uname = listBox1.Items[i].ToString();
            uname=uname.Substring(42);
            uname = uname.Remove(uname.LastIndexOf("/"));
            Subscription s = new Subscription();
            s.Type = SubscriptionEntry.SubscriptionType.channel;
            s.UserName = uname;
            //MessageBox.Show(uname); //Displays the username so that we know if it is correct
            try
            {
                s.AtomEntry.EditUri = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions";
                s.SubscriptionEntry.EditUri = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions";
                request.Delete(s);
            }
            catch (ArgumentNullException e)
            {
                MessageBox.Show(e.ToString(), "Error");
            }
            catch (GDataRequestException e)
            {
                MessageBox.Show(e.ToString(), "Error");
            }
        }
    }

（也可在http://pastebin.com/LnKMYCJp获得）

当代码“到达” request.Delete(s) 它给了我这个错误：

Google.GData.Client.GDataRequestException: Execution of request failed: http://gdata.youtube.com/feeds/api/users/iWinterHD/subscriptions --->System.Net.WebException: The remote server returned an error: (400) Bad Request.
    at System.Net.HttpWebRequest.GetResponse()
    at Google.GData.Client.GDataRequest.Execute()
    --- End of inner exception stack trace ---
    at Google.GData.Client.GDataRequest.Execute()
    at Google.GData.Client.GDataGAuthRequest.Execute(Int32 retryCounter)
    at Google.GData.Client.GDataGAuthRequest.Execute()
    at Google.GData.Client.Service.Delete(Uri uriTarget, String eTag)
    at Google.GData.Client.FeedRequest1.Delete[Y](Y entry)
    at Unsubscriber.SubForm.UnSubUsers() in C:\Users\iWinterHD\documents\visual studio 2010\Projects\Unsubscriber\Unsubscriber\SubForm.cs:line 112

有谁知道如何解决这个问题，我一直试图让它工作大约 2 个小时，但我仍然收到这个错误，无论我尝试什么

当我使用提琴手来查找有关连接的信息时，这是标题：

DELETE /feeds/api/users/iWinterHD/subscriptions HTTP/1.1
Content-Type: application/atom+xml; charset=UTF-8
User-Agent: G-Unsubscriber/GDataGAuthRequestFactory-CS-Version=2.1.0.0--IEnumerable
X-GData-Key: key=DEVELOPER_KEY
Authorization: GoogleLogin auth=DQAAAMgAAAAfAWmos6z7rpaY8JrK2RNK4Urf7Riu_putKeGgV1KFH5OEmAYA2t5w0DWXbVQJnizQiPmLSl-4D0eCozYn5jVp4DWs4Rpao3udc3eTIC9wibBGRe640m7zZjl96UnFMyf-fJDk0VrTIcAw74S7_WhwBaRDjLS77EOWfERw066NmcYO-2QB_6WZ4Y0o3Y4haVn_pRokm8ckyuTRWJf6cES1yVlZ4fP5diUySVsH7EaHLiUcAquUl7GWCMdF_JbjRVVxvgeMW1zV757JW8l841uk
GData-Version: 2.0
Host: gdata.youtube.com
Connection: Keep-Alive

然而，谷歌开发者的例子是这样的：

DELETE /feeds/api/users/default/subscriptions/SUBSCRIPTION_ID HTTP/1.1
Host: gdata.youtube.com
Content-Type: application/atom+xml
Authorization: Bearer ACCESS_TOKEN
GData-Version: 2
X-GData-Key: key=DEVELOPER_KEY

希望这会引起一些注意:)

score 1 · Accepted Answer

在玩了一些 API 之后，我想我已经找到了解决方案。

AtomEntry.EditUri需要与单个订阅的 URI 相同。碰巧这已经存储在SubscriptionEntry对象中（您正在覆盖）。

您的代码应类似于：

itemToRemove.AtomEntry.EditUri = itemToRemove.SubscriptionEntry.EditUri;

这是我用来测试的代码：

           var subscriptionsUrl = 
             "http://gdata.youtube.com/feeds/api/users/warmthonthesoul/subscriptions";
            var settings = new YouTubeRequestSettings([...]);
            var request = new YouTubeRequest(settings);

            var query = new YouTubeQuery(subscriptionsUrl);
            var feed = request.GetSubscriptionsFeed("warmthonthesoul").Entries;

            var itemToRemove = feed.SingleOrDefault(x =>
                                         x
                                         .SubscriptionEntry
                                         .Title.Text.Contains("Triforcefilms"));

            if(itemToRemove != null)
            {
                itemToRemove.AtomEntry.EditUri = itemToRemove
                                                    .SubscriptionEntry
                                                    .EditUri;
                request.Delete(itemToRemove);
                Console.WriteLine("Item removed");
            }

            Console.ReadLine();
        }

score 1 · Accepted Answer

在搜索所有变量大约 4 小时后，我最终偶然发现了 ID 变量，后来我发现需要将其传递到最终 URL 才能删除带有该 ID 的订阅，我对其进行了测试，它运行良好！

     public void ListSubs()
             {
                 string feedUrl = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions";
                 YouTubeQuery query = new YouTubeQuery(feedUrl);
                 try
                 {

                     subFeed = service.GetSubscriptions(query);

                     foreach (SubscriptionEntry entry in subFeed.Entries)
                     {
                         string id = entry.Id.AbsoluteUri;
                         id = id.Substring(id.LastIndexOf(":")+1);
                         listBox1.Items.Add(id);
                         string usrname = entry.Content.Src.Content;
                         usrname = usrname.Substring(42);
                         usrname = usrname.Remove(usrname.LastIndexOf("/"));
                         listBox2.Items.Add(usrname);
                     }
                 }
                 catch(GDataRequestException e)
                 {
                     MessageBox.Show(e.ToString(), "Error:");
                 }

             }

    public void UnSubUsers()
            {
                YouTubeRequestSettings yts = new YouTubeRequestSettings("Unsubscriber", DEVELOPER_KEY, username.Text, password.Text);
                YouTubeRequest request = new YouTubeRequest(yts);
                int i = 0;
                int x = 0;
                x = (listBox1.Items.Count);
                for (i=0;i<x ;i++ )
                {
                    string uname = listBox1.Items[i].ToString();
                    yts = new YouTubeRequestSettings("Unsubscriber", DEVELOPER_KEY, username.Text, password.Text);
                    request = new YouTubeRequest(yts);
                    Subscription s = new Subscription();
                    s.Type = SubscriptionEntry.SubscriptionType.channel;
                    s.UserName = uname;
                    s.Id = listBox1.Items[i].ToString()
                    try
                    {
                        s.AtomEntry.EditUri = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions" + "/" + listBox1.Items[i].ToString();
                        request.Delete(s);
                    }
                    catch (ArgumentNullException e)
                    {

                    }
                    catch (GDataRequestException e)
                    {

                    }
                }
            }

我必须将订阅 ID 添加到我用来删除订阅的 URL，这是我将订阅 ID 添加到我最初用于存储用户名的列表框的代码，事实证明你不能将用户名传递给 Delete 方法，但这同样有效，因为我添加了第二个列表框来查找订阅 ID 的用户名

    string id = entry.Id.AbsoluteUri;
    id = id.Substring(id.LastIndexOf(":")+1);
    listBox1.Items.Add(id);

此代码从条目变量中获取订阅 ID，然后将订阅 ID 添加到 EditUri 变量：

    s.AtomEntry.EditUri = "http://gdata.youtube.com/feeds/api/users/" + username.Text + "/subscriptions" + "/" + listBox1.Items[i].ToString();
    request.Delete(s);

我的大规模退订现已完成！

非常感谢@JamieDixon 的大力帮助！

c# - 以编程方式取消订阅 YouTube 用户 C#

2 回答 2

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