private void HandleFBFailure(string szUser, string szResult)
{
// see https://developers.facebook.com/docs/authentication/access-token-expiration/ for what we're trying to do here.
try
{
FacebookResponseError fberr = MFBFacebook.ParseJSonError(szResult);
if (fberr.Error != null)
{
if (fberr.Error.Code == 190)
{
// De-authorize
Profile pf = Profile.GetUser(szUser);
pf.FacebookAccessToken = null;
pf.FCommit();
// let them know that there is a problem.
util.NotifyUser(String.Format(CultureInfo.CurrentCulture, Resources.WebService.NotifyFacebookSetup, Branding.CurrentBrand.AppName),
String.Format(CultureInfo.CurrentCulture, Resources.EmailTemplates.ReauthFacebook,
pf.UserFullName,
fberr.Error.Code,
fberr.Error.ErrorSubcode,
fberr.Error.Message),
new MailAddress(pf.Email, pf.UserFullName),
false, false);
}
else
{
// send the raw result so we can debug.
util.NotifyAdminEvent("Facebook posting error", String.Format(CultureInfo.CurrentCulture, "user: {0}. FB Response: {1}", szUser, szResult), ProfileRoles.maskSiteAdminOnly);
}
}
}
catch (MyFlightbookException) { }
}
public bool PostToSocialMedia(IPostable o, string szUser, string szHost = null)
{
if (o == null)
{
throw new ArgumentNullException("o");
}
if (!o.CanPost)
{
return(false);
}
if (String.IsNullOrEmpty(szUser))
{
throw new ArgumentNullException("szUser");
}
if (String.IsNullOrEmpty(szHost))
{
szHost = Branding.CurrentBrand.HostName;
}
Profile pf = Profile.GetUser(szUser);
// Check for user not configured
if (pf.FacebookAccessToken == null || String.IsNullOrEmpty(pf.FacebookAccessToken.AccessToken))
{
return(false);
}
// NOTE: We need to update the version code below periodically as the API updates
const string szUrl = "https://graph.facebook.com/v2.10/me/feed";
MultipartFormDataContent form = new MultipartFormDataContent();
Uri uriItem = o.SocialMediaItemUri(szHost);
MyFlightbook.Image.MFBImageInfo img = o.SocialMediaImage(szHost);
// Add in the main parameters:
Dictionary <string, string> dictParams = new Dictionary <string, string>()
{
{ "access_token", pf.FacebookAccessToken.AccessToken },
{ "message", string.Empty }
};
if (uriItem != null)
{
dictParams.Add("link", uriItem.AbsoluteUri);
}
if (img != null)
{
dictParams.Add("picture", img.URLFullImage.ToAbsoluteURL("http", Branding.CurrentBrand.HostName).ToString());
}
foreach (string key in dictParams.Keys)
{
StringContent sc = new StringContent(dictParams[key]);
sc.Headers.ContentDisposition = (new System.Net.Http.Headers.ContentDispositionHeaderValue("form-data")
{
Name = key
});
sc.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("text/plain")
{
CharSet = "ISO-8859-1"
};
form.Add(sc);
}
// The remainder can run on a background thread, since we don't do anything that requires a result from here.
new System.Threading.Thread(() =>
{
using (HttpClient httpClient = new HttpClient())
{
try
{
HttpResponseMessage response = httpClient.PostAsync(new Uri(szUrl), form).Result;
string szResult = response.Content.ReadAsStringAsync().Result;
if (response.IsSuccessStatusCode)
{
// do a refresh, to extend as much as possible
if (MFBFacebook.ExchangeToken(pf.FacebookAccessToken))
{
pf.FCommit();
}
}
else
{
HandleFBFailure(szUser, szResult);
}
}
catch (MyFlightbookException) { }
catch (System.ArgumentNullException) { }
finally
{
form.Dispose();
}
}
}).Start();
return(true);
}