Develop Reference

Get User Access Token of Facebook in C# console application

I want to create a C# console application to create a post on my FaceBook account wall.
I tried to search how to get this but all i get is information about get access_token in web application where we can add redirect URL : http://localhost.
I am using below code to get an access_token in Console application.
But i get output from this below code is :
{
"access_token": "*****|*************",
"token_type": "bearer"
}
Which App_ID|App_Secret..where user Access_token should be of very big length.
Is this possible to post on facebook account wall using console application??
private const string FacebookApiId = "************";
private const string FacebookApiSecret = "**************************";
private const string AuthenticationUrlFormat =
"https://graph.facebook.com/oauth/access_token?client_id={0}&client_secret={1}&grant_type=client_credentials&scope=manage_pages,offline_access,publish_stream";
static void Main(string[] args)
{
string accessToken = GetAccessToken(FacebookApiId, FacebookApiSecret);
PostMessage(accessToken, "My message");
}
static string GetAccessToken(string apiId, string apiSecret)
{
string accessToken = string.Empty;
string url = string.Format(AuthenticationUrlFormat, apiId, apiSecret, "manage_pages,offline_access,publish_stream");
WebRequest request = WebRequest.Create(url);
WebResponse response = request.GetResponse();
using (Stream responseStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
String responseString = reader.ReadToEnd();
NameValueCollection query = HttpUtility.ParseQueryString(responseString);
accessToken = query["access_token"];
}
if (accessToken.Trim().Length == 0)
throw new Exception("There is no Access Token");
return accessToken;
}

WNS push notification cannot be sent

I'm using the following code to send a push raw notification to my app. The code is taken from the examples given in the official documentation.
public string PostToWns(string secret, string sid, string uri, string xml, string notificationType, string contentType)
{
try
{
var accessToken = GetAccessToken(secret, sid);
byte[] contentInBytes = Encoding.UTF8.GetBytes(xml);
HttpWebRequest request = HttpWebRequest.Create(uri) as HttpWebRequest;
request.Method = "POST";
request.Headers.Add("X-WNS-Type", notificationType);
request.ContentType = contentType;
request.Headers.Add("Authorization", String.Format("Bearer {0}", accessToken.AccessToken));
using (Stream requestStream = request.GetRequestStream())
requestStream.Write(contentInBytes, 0, contentInBytes.Length);
using (HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse())
// ^^^^^ This throws an exception ^^^^^
return webResponse.StatusCode.ToString();
}
catch (WebException webException)
{
HttpStatusCode status = ((HttpWebResponse)webException.Response).StatusCode;
if (status == HttpStatusCode.Unauthorized)
{
GetAccessToken(secret, sid);
return PostToWns(uri, xml, secret, sid, notificationType, contentType);
}
else if (status == HttpStatusCode.Gone || status == HttpStatusCode.NotFound)
{
return "";
}
else if (status == HttpStatusCode.NotAcceptable)
{
return "";
}
else
{
string[] debugOutput = {
status.ToString(),
webException.Response.Headers["X-WNS-Debug-Trace"],
webException.Response.Headers["X-WNS-Error-Description"],
webException.Response.Headers["X-WNS-Msg-ID"],
webException.Response.Headers["X-WNS-Status"]
};
return string.Join(" | ", debugOutput);
}
}
catch (Exception ex)
{
return "EXCEPTION: " + ex.Message;
}
}
// Authorization
[DataContract]
public class OAuthToken
{
[DataMember(Name = "access_token")]
public string AccessToken { get; set; }
[DataMember(Name = "token_type")]
public string TokenType { get; set; }
}
private OAuthToken GetOAuthTokenFromJson(string jsonString)
{
using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(jsonString)))
{
var ser = new DataContractJsonSerializer(typeof(OAuthToken));
var oAuthToken = (OAuthToken)ser.ReadObject(ms);
return oAuthToken;
}
}
protected OAuthToken GetAccessToken(string secret, string sid)
{
var urlEncodedSecret = HttpUtility.UrlEncode(secret);
var urlEncodedSid = HttpUtility.UrlEncode(sid);
var body = String.Format("grant_type=client_credentials&client_id={0}&client_secret={1}&scope=notify.windows.com",
urlEncodedSid,
urlEncodedSecret);
string response;
using (var client = new WebClient())
{
client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
response = client.UploadString("https://login.live.com/accesstoken.srf", body);
}
return GetOAuthTokenFromJson(response);
}
The server always returns Unauthorized. However, I am able to obtain a token without problems and the channel URL used is obtained as in the official example.
The entire code executes at once, so I doubt the token expires every time.
I tried using online tools to check if push notifications are working and the same Unauthorized error happens there.
Do I have to register for WNS somewhere? My app is already in the Store and I have the ID and password from the Live Services website. I use these as credentials to get the token and the token is obtained every time. I described this as part of a related question: Proper WNS credentials.
Does anyone have any ideas or solutions?

I found an answer in a different question: Windows Notifications Service: 401 Invalid Token when trying to create a Toast notification in PHP.
The client_id must be the full SID (including the protocol prefix) and the client_secret the password.

500 error when making API token request to cherwell

I'm getting a 500 internal server error when trying to access cherwell REST api via Code trying to return a token to make other calls. I've verified that all the information (username, password, ClientID, and client secret) are all correct. I've also verified the server is up and accepting requests. Something must be wrong with my code. Any help would be great!
string token = "";
string responseBody;
string serverName = "ql1cwbeta1";
//initialize web client
using (WebClient webClient = new WebClient())
{
// pull down parameters for body
string grantType = ConfigurationManager.AppSettings["grant_type"];
string clientId = ConfigurationManager.AppSettings["client_id"];
string username = ConfigurationManager.AppSettings["username"];
string password = ConfigurationManager.AppSettings["password"];
string authMode = ConfigurationManager.AppSettings["auth_mode"];
//add parameters in headers
webClient.Headers.Add("Accept", "application/json");
// adding parameters in body
NameValueCollection values = new NameValueCollection
{
{"grant_type", grantType},
{"client_id", clientId},
{"username", username},
{"password", password},
{"auth_mode", authMode}
};
try
{
byte[] responseBytes = webClient.
UploadValues("http://" + serverName + "/CherwellAPI/token?auth_mode=" + authMode + "&api_key=" + clientId, "POST", values);
responseBody = Encoding.UTF8.GetString(responseBytes);
}
catch (Exception exception)
{
return exception;
}

Hope below code may help you.
public static string TokenRequest()
{
try
{
// Create HTTP Web Request for the token request
HttpWebRequest tokenRequest = (HttpWebRequest)WebRequest.Create(Values.TokenURL);
byte[] data = Encoding.ASCII.GetBytes("username=" + Username + "&password=" + Password + "&client_id=" + ClientId + "&grant_type=" + GrantType);
// Set request verb POST, content type and content length (length of data)
tokenRequest.Method = "POST";
tokenRequest.ContentType = "application/x-www-form-urlencoded";
tokenRequest.ContentLength = data.Length;
// Stream request data
using (Stream stream = tokenRequest.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
// Get the response and read stream to string
using (WebResponse response = tokenRequest.GetResponse())
{
using (Stream stream = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(stream))
{
// responseText = sr.ReadToEnd();
return sr.ReadToEnd();
}
}
}
}
catch (WebException ex)
{
// Catch error for bad URL (404) or bad request (400) resulting from bad input (username, password, client id, grant type in token request)
if (ex.Message.Contains("400"))
{
// do something for bad request
}
else if (ex.Message.Contains("404"))
{
// do something for not found
}
else
{
// unknown error, do something
}
return null;
}
catch (Exception ex)
{
// General Exception
return null;
}
}

For future reference - You can include the client ID as part of the querystring if all parameters are included in the querystring, but if you are also sending a payload, then authmode should be the only thing in the querystring.
It will accept all of these parameters as querystrings.
However, you should know that for Cherwell specifically, if you are using LDAP auth / user accounts, you may need to URL encode your username values.
There are certain special characters that will break the auth command. Specifically, including a backslash for a domain can cause issues if it's not escaped with %5C , which I believe can cause a 400 error.
Also a cause of an error can be if you've chosen an authmode that's not enabled for the browser apps in the Security Settings page of the admin console ;)

C# facebook SDK dont work

I have a website write (.net 4) and i am tring to create some facebook login.
After i download Facebook sdk for c#, i am tring to get user info using the access token.
It seems to me that i am doing something wrong, all the examples i examined, were little bit diffrent from mine. instead of getting me paramethers by :
me["id"] // mine
me.id // examples
when i try to get values like the examples i got errors.
also i am having problem with get the email address of user, already add email to scope:
This method responsible for get the access token:
public string GetAccessToken()
{
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}",
strAppId, Request.Url.AbsoluteUri, strScope, Request["code"].ToString(), strAppSecret);
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('&'))
{
tokens.Add(token.Substring(0, token.IndexOf("=")),
token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf("=") - 1));
}
}
string access_token = tokens["access_token"];
return access_token;
}
This method responsible for get user information:
public string GetUserInfo(string strToken)
{
var client = new FacebookClient(strToken);
dynamic me = client.Get("me");
User user = new User();
try
{
string user_id = me["id"];
string user_first_name = me["first_name"];
string user_last_name = me["last_name"];
string user_name = me["username"];
string user_location = me["location"]["name"];
string user_city = me["hometown"]["name"];
//user_mail = me.email; }
catch(Exception ex)
{
}
return string.Empty;
}
when try to run on me.email or me["email"] i get this error:
'me.email' threw an exception of type 'Microsoft.CSharp.RuntimeBinder.RuntimeBinderException' dynamic {Microsoft.CSharp.RuntimeBinder.RuntimeBinderException}

I suggest you to use Microsoft.AspNet.Mvc.Facebook. It's easy to use and has all these properties already done.
http://www.asp.net/mvc/tutorials/mvc-4/aspnet-mvc-facebook-birthday-app

Simplest way to post to a facebook fan page's wall with C#!

I have a fan page setup for my company.
I want to automate the posting of regular updates to that page's wall from my C# desktop application.
Which Facebook C# library is the simplest?
How can I easily acquire the access token for this page?
What is the most concise code snippet that will simply allow me to then post to the wall?
I have read through all the docs and millions of stackoverflow and blog posts and it all seems very convoluted. Surely it can't be that hard..
I have setup an "application" within facebook that has its own App ID, API Key and App Secret etc.

#Aaron - the best library is the facebook c# sdk. I use it every day... granted I am biased as my company writes it - but it's a dynamic library and with the rate of updates from Facebook (every Tuesday) it is well suited for scalable development.
http://facebooksdk.codeplex.com/
I won't get into authentication with it - as on codeplex there are many examples:
http://facebooksdk.codeplex.com/wikipage?title=Code%20Examples&referringTitle=Documentation
But to do a post to a page, after you have authenticated and have an access token, the code would be something like this:
dynamic messagePost = new ExpandoObject();
messagePost.access_token = "[YOUR_ACCESS_TOKEN]";
messagePost.picture = "[A_PICTURE]";
messagePost.link = "[SOME_LINK]";
messagePost.name = "[SOME_NAME]";
messagePost.caption = "{*actor*} " + "[YOUR_MESSAGE]"; //<---{*actor*} is the user (i.e.: Aaron)
messagePost.description = "[SOME_DESCRIPTION]";
FacebookClient app = new FacebookClient("[YOUR_ACCESS_TOKEN]");
try
{
var result = app.Post("/" + [PAGE_ID] + "/feed", messagePost);
}
catch (FacebookOAuthException ex)
{
//handle something
}
catch (FacebookApiException ex)
{
//handle something else
}
Hope this helps.

I am posting this because of lack of good information on the internet that led to me spend more time than I needed. I hope this will benefit others. The key is adding &scope=manage_pages,offline_access,publish_stream to the url.
class Program
{
private const string FacebookApiId = "apiId";
private const string FacebookApiSecret = "secret";
private const string AuthenticationUrlFormat =
"https://graph.facebook.com/oauth/access_token?client_id={0}&client_secret={1}&grant_type=client_credentials&scope=manage_pages,offline_access,publish_stream";
static void Main(string[] args)
{
string accessToken = GetAccessToken(FacebookApiId, FacebookApiSecret);
PostMessage(accessToken, "My message");
}
static string GetAccessToken(string apiId, string apiSecret)
{
string accessToken = string.Empty;
string url = string.Format(AuthenticationUrlFormat, apiId, apiSecret);
WebRequest request = WebRequest.Create(url);
WebResponse response = request.GetResponse();
using (Stream responseStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
String responseString = reader.ReadToEnd();
NameValueCollection query = HttpUtility.ParseQueryString(responseString);
accessToken = query["access_token"];
}
if (accessToken.Trim().Length == 0)
throw new Exception("There is no Access Token");
return accessToken;
}
static void PostMessage(string accessToken, string message)
{
try
{
FacebookClient facebookClient = new FacebookClient(accessToken);
dynamic messagePost = new ExpandoObject();
messagePost.access_token = accessToken;
//messagePost.picture = "[A_PICTURE]";
//messagePost.link = "[SOME_LINK]";
//messagePost.name = "[SOME_NAME]";
//messagePost.caption = "my caption";
messagePost.message = message;,
//messagePost.description = "my description";
var result = facebookClient.Post("/[user id]/feed", messagePost);
}
catch (FacebookOAuthException ex)
{
//handle something
}
catch (Exception ex)
{
//handle something else
}
}
}

Check my answer over here:
how to post to facebook page wall from .NET
Check full example:
http://klaatuveratanecto.com/posting-on-facebook-wall-feed-with-c-and-asp-net-mvc-5/