I have been struggling with something and I seem to be missing something. I want to post events to Facebook using my Facebook appid / appsecret. The events should be owned by the application and not by any user. I try to do this as follows :
var fc = new FacebookClient();
fc.AppId = "myappid";
fc.AppSecret = "myappsecret";
//get a token
dynamic result = fc.Get("oauth/access_token", new
{
client_id = fc.AppId,
client_secret = fc.AppSecret,
grant_type = "client_credentials"
});
//use the token to post to FB?
fc = new FacebookClient(token);
JsonObject json = new JsonObject();
json.Add("name", HtmlUtils.StripHtmlTags(#event.Title));
json.Add("description", HtmlUtils.StripHtmlTags(#event.Description));
json.Add("start_time", #event.StartDate.ToString("yyyy-MM-dd HH:mm"));
json.Add("no_feed_story","true");
//here i get an error
var id = fc.post("/myappid/events",json);
(OAuthException - #1) An unknown error has occurred.
What am I doing wrong? My app is not in sandbox mode as well.
You used -
\POST /myappid/events
This is an invalid request. The events are posted on the user page or the fan page *via* an app.
There's nothing like "posting an event on the app"
Related
I'm writing a web app that pulls events data from Facebook, and I can get a lot of the information using an app token, but not the picture, which requires a client token, as documented here: https://developers.facebook.com/docs/graph-api/reference/v2.2/event/picture
I want the code that grabs the event data to run automatically on a server at regular intervals, without requiring a user to log in to their Facebook account.
Is there a way I can get a client token without user intervention? If not, is there another way I can get the event picture?
This is the code I am using to get the event data, using C# and JSON.Net (This gets a list of events created by the specified user - ResortStudios):
var fb = new FacebookClient();
dynamic result = fb.Get( "oauth/access_token", new
{
client_id = "XXXXXXXXXXX",
client_secret = "XXXXXXXXXXXXXXXXXXXXXXXXX",
grant_type = "client_credentials"
} );
var apptoken = result.access_token;
fb = new FacebookClient(apptoken);
result = fb.Get("ResortStudios/events");
JObject events = JObject.Parse(result.ToString());
JArray aEvents = (JArray)events["data"];
string s = aEvents.ToString();
List<fbEvent> lEvents = JsonConvert.DeserializeObject<List<fbEvent>>(s);
I've not tried this but something occurred to me that might work for you. Have you considered something like storing it a non-persistent data store like session state? Then, using the Facebook SDK for .NET, you create an ActionResult for UserInfo, like below. (I know this isn't directly applicable but I hoped it might get you thinking.)
//http://facebooksdk.net/docs/web/ajax-requests/
public ActionResult UserInfo()
{
var accessToken = Session["AccessToken"].ToString();
var client = new FacebookClient(accessToken);
dynamic result = client.Get("me", new { fields = "name,id" });
return Json(new
{
id = result.id,
name = result.name,
});
}
Scenario: I want to get user access token of the fb page admin by JS login and retrieving token ONE TIME, and will store that in database. Then daily, I want to do wall post to those page.
I am using JS to get the initial token and storing it. Then using c# FacebookSDK for the web requests.
FB.login(function (response) {
var r = response;
// get access token of the user and update in database
$("#FacebookAccessToken").val(response.authResponse.accessToken);
},
{
scope: 'manage_pages,publish_stream'
});
Now I am saving this token in database as I will be using this for future graph calls - is this right?
On server side when I need to do a post after a day I retrieve that token and do the processing as below:
// step 1 get application access token
var fb1 = new FacebookClient();
dynamic appTokenCLient = fb1.Get("oauth/access_token", new
{
client_id = appId,
client_secret = appSecret,
grant_type = "client_credentials",
scope = "manage_pages,publish_stream",
redirect_uri = siteUrl
});
var fbTokenSettingVal = GetTokenFromDB(); // getting access token from database which was stored during JS fb login
// step 2 extend token
var fb2 = new FacebookClient(appTokenCLient.access_token);
dynamic extendedToken = fb2.Get("oauth/access_token", new
{
client_id = appId,
client_secret = appSecret,
grant_type = "fb_exchange_token",
fb_exchange_token = fbTokenSettingVal.Val
});
var userExtendedToken = extendedToken.access_token; // get extended token and update database
// step 3 get page access token from the pages, that the user manages
var fb3 = new FacebookClient { AppId = appId, AppSecret = appSecret, AccessToken = userExtendedToken };
var fbParams = new Dictionary<string, object>();
var publishedResponse = fb3.Get("/me/accounts", fbParams) as JsonObject;
var data = JArray.Parse(publishedResponse["data"].ToString());
var pageToken = "";
foreach (var account in data)
{
if (account["name"].ToString().ToLower().Equals("PAGE_NAME"))
{
pageToken = account["access_token"].ToString();
break;
}
}
// step 4 post a link to the page - throws error !
var fb4 = new FacebookClient(pageToken);
fb4.Post("/PAGE_NAME/feed",
new
{
link = "http://www.stackoverflow.com"
});
The last 4th step throws error, when posting to selected page:
The user hasn't authorized the application to perform this action
Have tried several different ways, but in vain. Assume that there is just a simple step which I am doing wrong here.
Also, is it ok to extend the fb access token for user every time before making request?
Any way to check if token is expired or not?
If you want to use that access token for future. You need to take offline_access token and that token you need to store in database.
This offline accesstoken will be expire once user will change the password or delete your application from facebook account.
private void GetPermenentAccessTokenOfUser(string accessToken)
{
var client2 = new FacebookClient(accessToken);
//get permenent access token
dynamic result = client2.Post("oauth/access_token", new
{
client_id = _apiKey,
client_secret = _apiSecret,
grant_type = "fb_exchange_token",
fb_exchange_token = accessToken
});
_accessToken = result.access_token;
}
Looks like for new apps we need to apply for manage_pages permission from our application:
which I am doing now. As it shows error when doing login:
Also, the app needs to be live, so they can reproduce this permission and verify that we do need this permission to post to pages. Its good for fb users safety but a time taking process for developers.
Any way this can be skipped for testing purpose?
I have a website made with ASP.NET webform .NET 4.5 C#. This site contains a forum(homemade by me), parts of this forum needs to be posted to the specific facebook wall(made for this webpage). What I need :
Post just created thread(message) from specific part of the forum to the corsponding facebook wall.
Optional : Sync the forum thread on webpage with message/comments on the specific facebook page
I have looked at these guides :
http://www.codeproject.com/Articles/569920/Publish-a-post-on-Facebook-wall-using-Graph-API
http://www.c-sharpcorner.com/UploadFile/raj1979/post-on-facebook-users-wall-using-Asp-Net-C-Sharp/
But im not sure that this is really the solution for me? I have tried to follow the guide but it does not look the same.
Edit :
dynamic result;
//https://developers.facebook.com/tools/explorer/
//https://developers.facebook.com/tools/access_token/
FacebookClient client = new FacebookClient(ConfigurationManager.AppSettings["FacebookAppToken"]);
//result = client.Get("debug_token", new
//{
// input_token = ConfigurationManager.AppSettings["FacebookAppToken"],
// access_token = ConfigurationManager.AppSettings["FacebookAppToken"]
//});
//result = client.Get("oauth/access_token", new
// {
// client_id = ConfigurationManager.AppSettings["FacebookAppId"],
// client_secret = ConfigurationManager.AppSettings["FacebookAppSecret"],
// grant_type = "client_credentials",
// //redirect_uri = "http://www.MyDomain.net/",
// //code = ""
// });
result = client.Get("oauth/access_token", new
{
client_id = ConfigurationManager.AppSettings["FacebookAppId"],
client_secret = ConfigurationManager.AppSettings["FacebookAppSecret"],
grant_type = "client_credentials"
});
client.AccessToken = result.access_token;
result = client.Post("[IdOfFacebookPage]/feed", new { message = "Test Message from app" });
//result.id;
result = client.Get("[IdOfFacebookPage]");
return false;
Approach to post to a facebook wall:
You need to register in facebook developer tools.
Create a app (fill a form).
Download FGT 5.0.480 (Facebook graph toolkit)
Reference FGT dlls in your web application.
FGT has methods to post to facebook wall but needs appId.
Use the app id of your app created in step 2.
To post to an user's wall through facebook, it is only possible through an app.
Try this asp .net app, which will allow you to post in your wall:
https://apps.facebook.com/aspdotnetsample/?fb_source=search&ref=br_tf
This will allow you to envision what you need.
Your app gets an appId with which you need to generate auth token.
Limitation: The user's wall where you want to post should have added the app created at step 2, this is compulsory and there is no work around.
When the user accesses the app for the first time, it automatically asks for permission to post to wall--> the user needs to accept it.
Hope this gives you an idea on how to go about doing this.
You can then post into the user's wall.
For Banshee's below request using Facebook SDK for .NET:
userId - facebook user id, wall to post the message
This user should have added the app created by you in step 1 else it will say unauthorized access.
dynamic messagePost = new ExpandoObject();
messagePost.picture = "http://www.stackoverflow.com/test.png";
messagePost.link = "http://www.stackoverflow.com";
messagePost.name = "This is a test name";
messagePost.caption = "CAPTION 1";
messagePost.description = "Test desc";
messagePost.message = "message"
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new {
client_id = "app_id",
client_secret = "app_secret",
grant_type = "client_credentials"
});
fb.AccessToken = result.access_token;
try
{
var postId = fb.Post(userId + "/feed", messagePost);
}
catch (FacebookOAuthException ex)
{
//handle oauth exception
}
catch (FacebookApiException ex)
{
//handle facebook exception
}
You will need an extended token to publish to a wall.. Steps to get extended token is explained well by Banshee..
Edit: How to get extended token by Banshee:
Please follow this post
By creating a extended page token and use it to make the post everything works just fine. See this : How to get Page Access Token by code?
Im surprised that this simple task was so hard to get running and that there was vary little help to get.
I am using visual studio 2013 .NET 4.5 and C# with a windows forms client application, I am trying to post a message to my own Facebook managed page. I have created a new Facebook application, but not yet published it, I am unsure of the settings, but I have the app_id, app_secret and from debugging I have the access_token.
I used a piece of code to open a browser window to login with permissions and this was successful/
I am getting the following error:
OAuthException - #200) (#200) The user hasn't authorized the application to perform this action
The code I am using is below:
var fb = new FacebookClient("AUTH_CODE")
dynamic parameters = new ExpandoObject();
parameters.message = "hello tweet tweet";
dynamic result = fb.Post("SITE_ID/feed", parameters);
var id = result.id;
for logging in I am using:
var client = new FacebookClient();
client.AppSecret = app_secret;
client.AppId = app_id;
client.AccessToken = "AUTH_CODE";
var fbLoginUri = client.GetLoginUrl(new
{
client_id = app_id,
redirect_uri =
"https://www.facebook.com/connect/login_success.html",
response_type = "code",
scope = "manage_pages,offline_access,publish_stream,publish_actions"
});
System.Diagnostics.Process.Start(url);
I am already logged in and the message on the browser shows SUCCESS...
The DLL that I have referenced is the latest v6.0 Facebook C# SDK
Do I need to setup the Facebook app so that it has permissions to post onto my managed wall and if so how do I do it.
I hope someone out there can help, I have been looking at this for days and I need a little help.
PS:
I have also tried the following code:
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new
{
client_id = app_id,
client_secret = app_secret,
grant_type = "client_credentials",
scope = "manage_pages,offline_access,publish_stream"
});
var app_token = result.access_token;
var client = new FacebookClient(app_token);
dynamic parameters = new ExpandoObject();
parameters.message = "Check out this funny article";
parameters.link = "http://www.natiska.com/article.html";
parameters.picture = "http://www.natiska.com/dav.png";
parameters.name = "Article Title";
parameters.caption = "Caption for the link";
//446533181408238 is my fan page
client.Post("/446533181408238/feed", parameters);
Paul.
It seems that the request code from your access token request is missing which probably causes this error, see this question for more details on this.
I am trying to send a notification (not app requests) to registered users, server-side using the C# Facebook SDK. I actually get a success message, but no notification is sent. Our app is not in sandbox and has canvas enabled. The code below show attempts to send both notifications and app requests--the notifications do nothing, but the app request works:
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new
{
client_id = "MY_APP_KEY",
client_secret = "MY_SECRET",
grant_type = "client_credentials"
});
fb.AccessToken = result.access_token;
dynamic nparams = new ExpandoObject();
nparams.template = "Hello from my app!";
nparams.href = "Home";
dynamic requestParams = new ExpandoObject();
requestParams.message = "Hi there";
requestParams.title = "Please use this awesome app";
foreach (string facebookID in facebookIDs)
{
// This returns success:true, but doesn't actually do anything
var postResult = fb.Post(facebookID + "/notifications", nparams);
// This works and shows a request in the app center
var postResult2 = fb.Post(facebookID + "/apprequests", requestParams);
}
The fact that apprequests send here tells me the access token is ok, so why don't notifications work? We really need to do this server-side--has anyone been able to do that?
Got a response from facebook on this . . . basically, that this feature is in beta and it may just not work, despite giving Success responses
Good snippet Anthony. Appears to be working consistently now. +1 for your attempt.
PS: In case anyone stumbles upon this code, "facebookID" is a numeric Id and can be derived using the following link http://findmyfacebookid.com/