protected override void SaveSharePointContext(CustomSharePointContext spContext, ISessionContext context)
{
if (null == spContext)
{
return;
}
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
// Update the session store with parameters.
var spHTContext = (CustomSharePointContext.CustomSharePointHighTrustContext)spContext;
if (null != spHTContext.SPHostUrl)
{
context.SetParam(Constants.SPHostUrlKey, spHTContext.SPHostUrl?.ToString());
}
if (null != spHTContext.SPAppWebUrl)
{
context.SetParam(Constants.SPAppWebUrlKey, spHTContext.SPAppWebUrl.ToString());
}
context.SetParam(Constants.SPClientTagKey, spHTContext.SPClientTag);
context.SetParam(Constants.SPLanguageKey, spHTContext.SPLanguage);
context.SetParam(Constants.SPProductNumberKey, spHTContext.SPProductNumber);
}
private static Uri GetAppRedirectUrl(ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
// Make sure we don't redirect over and over again.
const string SPHasRedirectedToSharePointKey = "SPHasRedirectedToSharePoint";
if (!string.IsNullOrEmpty(context.GetParam <string>(SPHasRedirectedToSharePointKey)))
{
return(null);
}
var spHostUrl = CustomSharePointContext.GetSPHostUrl(context);
if (null == spHostUrl)
{
return(null);
}
var requestUrl = context.GetRequestUrl;
if (null == requestUrl)
{
return(null);
}
var queryNameValueCollection = HttpUtility.ParseQueryString(requestUrl.Query);
// Removes the values that are included in {StandardTokens}, as {StandardTokens}
// will be inserted at the beginning of the query string.
queryNameValueCollection.Remove(Constants.SPHostUrlKey);
queryNameValueCollection.Remove(Constants.SPAppWebUrlKey);
queryNameValueCollection.Remove(Constants.SPLanguageKey);
queryNameValueCollection.Remove(Constants.SPClientTagKey);
queryNameValueCollection.Remove(Constants.SPProductNumberKey);
// Adds SPHasRedirectedToSharePoint=1.
queryNameValueCollection.Add(SPHasRedirectedToSharePointKey, "1");
var returnUrlBuilder = new UriBuilder(requestUrl)
{
Query = queryNameValueCollection.ToString()
};
// Inserts StandardTokens.
const string StandardTokens = "{StandardTokens}";
var returnUrlString = returnUrlBuilder.Uri.AbsoluteUri;
returnUrlString = returnUrlString.Insert(returnUrlString.IndexOf("?", StringComparison.Ordinal) + 1, StandardTokens + "&");
var redirectUrlString = TokenHelper.GetAppContextTokenRequestUrl(spHostUrl.AbsoluteUri, Uri.EscapeDataString(returnUrlString));
return(new Uri(redirectUrlString, UriKind.Absolute));
}
protected override bool ValidateSharePointContext(
CustomSharePointContext spContext, ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
if (!(spContext is CustomSharePointContext.CustomSharePointAcsContext spAcsContext))
{
return(false);
}
var spHostUrl = CustomSharePointContext.GetSPHostUrl(context);
var spContextString = GetContextString(context);
return(spHostUrl == spAcsContext.SPHostUrl &&
!string.IsNullOrEmpty(spAcsContext.ContextToken) &&
(string.IsNullOrEmpty(spContextString) || spContextString == spAcsContext.ContextToken));
}
protected override bool ValidateSharePointContext(
CustomSharePointContext spContext, ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
if (!(spContext is CustomSharePointContext.CustomSharePointHighTrustContext spHighTrustContext))
{
return(false);
}
var spHostUrl = CustomSharePointContext.GetSPHostUrl(context);
var logonUserIdentity = context.GetLogonUser;
return(spHostUrl == spHighTrustContext.SPHostUrl &&
logonUserIdentity != null &&
logonUserIdentity.IsAuthenticated &&
!logonUserIdentity.IsGuest &&
logonUserIdentity.User == spHighTrustContext.LogonUserIdentity.User);
}
public CustomSharePointContext CreateSharePointContext(ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
var spHostUrl = CustomSharePointContext.GetSPHostUrl(context);
if (null == spHostUrl)
{
return(null);
}
var spLanguage = context.GetParam <string>(Constants.SPLanguageKey);
if (string.IsNullOrEmpty(spLanguage))
{
return(null);
}
var spClientTag = context.GetParam <string>(Constants.SPClientTagKey);
if (string.IsNullOrEmpty(spClientTag))
{
return(null);
}
var spProductNumber = context.GetParam <string>(Constants.SPProductNumberKey);
if (string.IsNullOrEmpty(spProductNumber))
{
return(null);
}
var spAppWebUrlString = TokenHelper.EnsureTrailingSlash(context.GetParam <string>(Constants.SPAppWebUrlKey));
if (!Uri.TryCreate(spAppWebUrlString, UriKind.Absolute, out var spAppWebUrl) ||
!(spAppWebUrl.Scheme == Uri.UriSchemeHttp || spAppWebUrl.Scheme == Uri.UriSchemeHttps))
{
spAppWebUrl = null;
}
return(CreateSharePointContext(spHostUrl, spAppWebUrl, spLanguage, spClientTag, spProductNumber, context));
}
protected abstract void SaveSharePointContext(CustomSharePointContext spContext, ISessionContext context);
protected abstract bool ValidateSharePointContext(
CustomSharePointContext spContext, ISessionContext context);
