/// <summary>
/// Call Facebook Graph API with given set of parameters
/// </summary>
/// <param name="url"></param>
/// <param name="sendSecretProof"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public static dynamic FacebookApi(Method method, dynamic siteSettings, string url, object payload, bool sendSecretProof = false, bool throwOnError = false, params string[] queryStringPair)
{
RestClient client = new RestClient("https://graph.facebook.com/");
RestRequest req = new RestRequest(url, method);
// add parameters
if (queryStringPair != null)
{
if (queryStringPair.Length % 2 != 0)
{
throw new ArgumentOutOfRangeException("parameterPairs are not pairs");
}
for (int i = 0; i < queryStringPair.Length; i += 2)
{
var key = queryStringPair[i];
var value = queryStringPair[i + 1];
if (key == "access_token")
{
throw new ArgumentOutOfRangeException("access_token will be added automatically");
}
if (key == "appsecret_proof")
{
throw new ArgumentOutOfRangeException("appsecret_proof will be added automatically");
}
req.Parameters.Add(new Parameter()
{
Name = key,
Value = value,
Type = ParameterType.QueryString
});
}
}
if (sendSecretProof)
{
string hash = MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] as string;
if (hash == null)
{
hash = FacebookWebHook.HashHmac((string)siteSettings.FacebookMessenger.PageAccessToken,
(string)siteSettings.Application.FacebookAppSecret);
MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] = hash;
}
req.AddQueryParameter("appsecret_proof", hash);
}
req.AddQueryParameter("access_token", (string)siteSettings.FacebookMessenger.PageAccessToken);
if (payload is string)
{
req.AddParameter("payload", payload);
}
else
{
req.RequestFormat = DataFormat.Json;
req.AddJsonBody(payload);
}
var response = client.Execute(req);
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
MailSenderModule.SendEmail("*****@*****.**", "Facebook API Post Error", response.ToString());
if (throwOnError)
{
throw new Exception("Server Returned: " + response.StatusCode);
}
}
return(JObject.Parse(response.Content));
}
/// <summary>
/// Call Facebook Graph API with given set of parameters
/// </summary>
/// <param name="url"></param>
/// <param name="sendSecretProof"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public static IEnumerable <dynamic> FacebookApiGet(dynamic siteSettings, string url, bool sendSecretProof = false, bool throwOnError = false, params string[] queryStringPair)
{
var client = new RestClient("https://graph.facebook.com/");
var req = new RestRequest(url, Method.GET);
// add parameters
if (queryStringPair != null)
{
if (queryStringPair.Length % 2 != 0)
{
throw new ArgumentOutOfRangeException("parameterPairs are not pairs");
}
for (int i = 0; i < queryStringPair.Length; i += 2)
{
var key = queryStringPair[i];
var value = queryStringPair[i + 1];
if (key == "access_token")
{
throw new ArgumentOutOfRangeException("access_token will be added automatically");
}
if (key == "appsecret_proof")
{
throw new ArgumentOutOfRangeException("appsecret_proof will be added automatically");
}
req.Parameters.Add(new Parameter()
{
Name = key,
Value = value,
Type = ParameterType.QueryString
});
}
}
if (sendSecretProof)
{
string hash = MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] as string;
if (hash == null)
{
hash = FacebookWebHook.HashHmac((string)siteSettings.FacebookMessenger.PageAccessToken,
(string)siteSettings.Application.FacebookAppSecret);
MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] = hash;
}
req.AddQueryParameter("appsecret_proof", hash);
}
req.AddQueryParameter("access_token", (string)siteSettings.FacebookMessenger.PageAccessToken);
LoadMore:
var response = client.Execute(req);
if (throwOnError && response.StatusCode != System.Net.HttpStatusCode.OK)
{
throw new Exception("Server Returned: " + response.StatusCode);
}
dynamic result = JObject.Parse(response.Content);
if (result.data != null)
{
foreach (var item in result.data)
{
yield return(item);
}
}
else
{
// this is a single item response
yield return(result);
}
if (result.paging != null && result.paging.next != null)
{
req.AddQueryParameter("after", (string)result.paging.cursors.after);
goto LoadMore;
}
}