protected override CustomSharePointContext LoadSharePointContext(ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
// Load context parameters from session store.
var spHostUrl = context.GetParam <string>(Constants.SPHostUrlKey).ToUri();
var spAppWebUrl = context.GetParam <string>(Constants.SPAppWebUrlKey).ToUri();
var spLanguage = context.GetParam <string>(Constants.SPLanguageKey);
var spClientTag = context.GetParam <string>(Constants.SPClientTagKey);
var spProductNumber = context.GetParam <string>(Constants.SPProductNumberKey);
return(CreateSharePointContext(spHostUrl, spAppWebUrl, spLanguage, spClientTag, spProductNumber, context));
}
public static Uri GetSPHostUrl(ISessionContext context)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
return(context.GetParam <string>(Constants.SPHostUrlKey).ToUri());
}
private static string GetContextString(ISessionContext context)
{
// Check cookie first.
var contextString = context.GetParam <string>(Constants.SPContextTokenCookieName);
if (!string.IsNullOrEmpty(contextString))
{
return(contextString);
}
string[] paramNames = { "AppContext", "AppContextToken", "AccessToken", "SPAppToken" };
return(paramNames.Select(context.GetParam <string>).FirstOrDefault(val => !string.IsNullOrEmpty(val)));
}
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));
}
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));
}
