/// <summary>
/// Creates a ClientContext token for the incoming WebAPI request. This is done by
/// - looking up the servicesToken
/// - extracting the cacheKey
/// - get the AccessToken from cache. If the AccessToken is expired a new one is requested using the refresh token
/// - creation of a ClientContext object based on the AccessToken
/// </summary>
/// <param name="httpControllerContext">Information about the HTTP request that reached the WebAPI controller</param>
/// <returns>A valid ClientContext object</returns>
public static IAccessTokenInfo GetAccessTokenInfo(HttpControllerContext httpControllerContext)
{
if (httpControllerContext == null)
{
throw new ArgumentNullException("httpControllerContext");
}
string cacheKey = GetCacheKey(httpControllerContext.Request);
if (!String.IsNullOrEmpty(cacheKey))
{
IAccessTokenInfo cacheItem = WebAPIContextCache.Instance.Get(cacheKey);
if (!cacheItem.isValid())
{
cacheItem.RefreshTokens();
WebAPIContextCache.Instance.Put(cacheKey, cacheItem);
}
return(cacheItem);
}
else
{
throw new Exception("The cookie with the cachekey was not found...nothing can be retrieved from cache, so no clientcontext can be created.");
}
}
/// <summary>
/// Adds an item to the cache. Updates if the item already existed
/// </summary>
/// <param name="cacheKey">Key to cache the item</param>
/// <param name="sharePointServiceContextCacheItem">A <see cref="WebAPIContexCacheItem"/> object</param>
public void Put(string cacheKey, IAccessTokenInfo sharePointServiceContextCacheItem)
{
if (!clientContextCache.ContainsKey(cacheKey))
{
clientContextCache.Add(cacheKey, sharePointServiceContextCacheItem);
}
else
{
clientContextCache[cacheKey] = sharePointServiceContextCacheItem;
}
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (filterContext == null)
{
throw new ArgumentNullException("filterContext");
}
if (filterContext.HttpContext.Request.Cookies["CacheKey"] != null)
{
string cacheKey = filterContext.HttpContext.Request.Cookies["CacheKey"].Value;
IAccessTokenInfo cacheItem = WebAPIContextCache.Instance.Get(cacheKey);
if (cacheItem != null)
{
if (!cacheItem.isValid())
{
cacheItem.RefreshTokens();
WebAPIContextCache.Instance.Put(cacheKey, cacheItem);
}
return;
}
else
{
// Webbservern har startat om och cachen är tömd
//throw new Exception("IAccessTokenInfo is not valid");
}
}
// Första anropet, skapa AccessTokenInfo
IAccessTokenInfo accessTokenInfo = null;
if (TokenHelper.IsHighTrustApp())
{
accessTokenInfo = new OnPremAccessTokenInfo(filterContext.HttpContext.Request);
}
else
{
accessTokenInfo = new CloudAccessTokenInfo(filterContext.HttpContext.Request);
}
filterContext.HttpContext.Request.Cookies.Add(new System.Web.HttpCookie("CacheKey", accessTokenInfo.CacheKey));
//filterContext.HttpContext.Request.Cookies["CacheKey"].Value = accessTokenInfo.CacheKey;
filterContext.HttpContext.Response.Cookies["CacheKey"].Value = accessTokenInfo.CacheKey;
WebAPIContextCache.Instance.Put(accessTokenInfo.CacheKey, accessTokenInfo);
//responseMessage.Headers.AddCookies(new CookieHeaderValue[] { cookie });
// filterContext.Result = new RedirectResult(redirectUrl.AbsoluteUri);
// filterContext.Result = new ViewResult { ViewName = "Error" };
}