c# - 没有足够的权限代表查看者发布目标

Question

我有以下代码:

private void CheckAuthorization()
        {
            string app_id = "x";
            string app_secret = "x";
            string scope = "publish_stream,publish_actions";

            if (Request["code"] == null)
            {
                Response.Redirect(string.Format(
                    "https://graph.facebook.com/oauth/authorize?client_id={0}&redirect_uri={1}&scope={2}",
                    app_id, Request.Url.AbsoluteUri, scope));
            }
            else
            {
                Dictionary<string, string> tokens = new Dictionary<string, string>();

                string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&scope={2}&code={3}&client_secret={4}",
                    app_id, Request.Url.AbsoluteUri, scope, Request["code"].ToString(), app_secret);

                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

                using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
                {
                    StreamReader reader = new StreamReader(response.GetResponseStream());

                    string vals = reader.ReadToEnd();

                    foreach (string token in vals.Split('&'))
                    {
                        //meh.aspx?token1=steve&token2=jake&...
                        tokens.Add(token.Substring(0, token.IndexOf("=")),
                            token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf("=") - 1));
                    }
                }

                string access_token = tokens["access_token"];

                var client = new FacebookClient(access_token);

                //client.Post("/me/feed", new { message = "A simple test" });

                var args = new Dictionary<string, object>();
                args["message"] = "abc";
                args["caption"] = "This is caption!";
                args["description"] = "This is description!";
                args["name"] = "This is name!";
                args["picture"] = "picutre";
                args["link"] = "http://www.bradspel.net/";

                client.Post("/1418771281723422/feed", args);

            }
        }

发帖时我得到这个:

(OAuthException - #200) (#200) Insufficient permission to post to target on behalf of the viewer

如果我将 client.post 更改为:

client.Post("/me/feed", args);

它工作得很好。

那么，当我要发布到特定的墙上时，为什么这不起作用？我已经在这个facebook页面上设置了允许所有人发帖的权限。 Facebook 应用程序设置为在线。

Answer 1

通过创建扩展页面 token 并使用它来使帖子一切正常。看到这个:How to get Page Access Token by code?

令我惊讶的是，这个简单的任务执行起来如此困难，而且几乎没有什么帮助。