Question

Web Request help C#

Asked by: GVNPublic123

Hello,

What I am trying to do is use YouTube API in order to gather some susbscription information (see http://code.google.com/apis/youtube/2.0/developers_guide_dotnet.html#Retrieving_a_Subscription)

So what I do is:
   string url = "http://gdata.youtube.com/feeds/api/users/" + TUsername + "/subscriptions";
            WebRequest request;        
                     
           try
            {
                Application.DoEvents();
                request = WebRequest.Create(url);
                string usernamePassword = TUsername + ":" + TPassword;
                CredentialCache mycache = new CredentialCache();
                mycache.Add(new Uri(url), "Basic", new NetworkCredential(TUsername, TPassword));
                request.Credentials = mycache;
                request.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword)));

                WebResponse response = request.GetResponse();
                Stream receiveStream = response.GetResponseStream();
                StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);
                content = reader.ReadToEnd();

But it returns me 401 unauthorized error...

Im new to YouTube API, so please help me what I am doing wrong...!

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Asked On
2009-11-07 at 04:43:28ID24880330
Tags

C#

Topic

C# Programming Language

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: GVNPublic123Posted on 2009-11-07 at 05:09:07ID: 25766178

I also tried using the API library:

 YouTubeRequestSettings settings = new YouTubeRequestSettings(hidden for privacy, TUsername, TPassword);
                YouTubeRequest request = new YouTubeRequest(settings);

                string feedUrl = "http://gdata.youtube.com/feeds/api/users/default/subscriptions";
                YouTubeQuery query = new YouTubeQuery(feedUrl);
                SubscriptionFeed subFeed = service.GetSubscriptions(query);

                foreach (SubscriptionEntry entry in subFeed.Entries)
                {
                   //do something
                }

And it gives me exception on 401 - Unauthorized!!! Im angry now!

I tried with YouTube account (TUsername, TPass) and Google Account linked to my YouTube account, and it fails in both ways!

 

by: Ashok9Posted on 2009-11-07 at 06:36:51ID: 25766452

You can use the below function for any http request. This will give response and error message too.

        public static bool httpRequest(string url, out string responsedata, out string errorMessage)
        {
            errorMessage = "";
            responsedata = "";
            try
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
                request.Method = "GET";
                request.UserAgent = "Ozeki/C#-http-client";
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode == HttpStatusCode.OK)
                {
                    StreamReader responseReader = new StreamReader(response.GetResponseStream());
                    responsedata = responseReader.ReadToEnd();
                    responseReader.Close();
                    return true;
                }
                else
                {
                    errorMessage = "HTTP response status was not 200 OK.";
                    return false;
                }
            }
            catch (Exception e)
            {
                errorMessage = e.Message;
                return false;
            }
        }
                                              
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by: GVNPublic123Posted on 2009-11-07 at 06:53:24ID: 25766507

Nah, thats the same...

 

by: Ashok9Posted on 2009-11-07 at 07:47:02ID: 25766661

as you are getting 401 error.
It seems that you dont have permission to access that resource.

Because this may be thing to do with session on web.
Probably you have to get permissions to access.
For permission details you have to visit that request page provider.

 

by: GVNPublic123Posted on 2009-11-07 at 07:54:36ID: 25766708

I am using API, I have Developer key, username and password. See here:

YouTubeRequestSettings settings = new YouTubeRequestSettings("Hidden", null, "78niF8uvu2WDTTJ2xUGICxWEpWNJ4BR9Lzlkv7h9RsLA", TUsername, TPassword);
               YouTubeRequest request = new YouTubeRequest(settings);

               string feedUrl = "http://gdata.youtube.com/feeds/api/users/default/subscriptions";
               YouTubeQuery query = new YouTubeQuery(feedUrl);
               SubscriptionFeed subFeed = service.GetSubscriptions(query);

               foreach (SubscriptionEntry entry in subFeed.Entries)
               {
                   MessageBox.Show(entry.Title.Text + entry.Content.Src.Content);
               }

default in url means I am logged in so it auto goes to my username.

 

by: SheppePosted on 2009-11-09 at 09:13:13ID: 25777857

This is what google has to say regarding your error. It seems either your token is invalid, or expired.

Authentication errors
An authentication error, which is identified by a <domain> tag value of yt:authentication, identifies a problem related to an improperly authenticated request to execute an API function requiring user authentication. Authentication errors could be identified with HTTP 401 or 403 response codes.
Authentication errors may include a <location> element. If so, the element's value will identify the header that caused the authentication error.
For authentication errors, the <code> tag will contain one of the following values:


InvalidToken - This code indicates that the authentication token specified in the Authorization header is invalid.
<?xml version='1.0' encoding='UTF-8'?>
<errors>
  <error>
    <domain>yt:authentication</domain>
    <code>InvalidToken</code>
    <location type='header'>Authorization: GoogleLogin</location>
  </error>
</errors>


TokenExpired - This code indicates that the authentication token specified in the Authorization header has expired.
<?xml version='1.0' encoding='UTF-8'?>
<errors>
  <error>
    <domain>yt:authentication</domain>
    <code>TokenExpired</code>
    <location type='header'>Authorization: GoogleLogin</location>
  </error>
</errors>

 

by: GVNPublic123Posted on 2009-11-27 at 05:44:56ID: 31651369

IDK

20120131-EE-VQP-002

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