private StreamData GenerateStreamData(EntityInstance entityInstance, XmlBaseAnnotation baseAddressAnnotation, QueryProperty streamProperty)
{
string editLinkValue;
string contentType;
string etag;
if (streamProperty.Name == AstoriaQueryStreamType.DefaultStreamPropertyName)
{
editLinkValue = entityInstance.StreamEditLink;
contentType = entityInstance.StreamContentType;
etag = entityInstance.StreamETag;
}
else
{
var namedStream = entityInstance.Properties.OfType<NamedStreamInstance>().SingleOrDefault(p => p.Name == streamProperty.Name);
ExceptionUtilities.CheckObjectNotNull(namedStream, "Could not find name stream '{0}' in entity payload", streamProperty.Name);
editLinkValue = namedStream.EditLink;
contentType = namedStream.EditLinkContentType;
etag = namedStream.ETag;
}
if (contentType == null)
{
// TODO: add atom/json?
contentType = this.Random.ChooseFrom(new[] { MimeTypes.TextPlain, MimeTypes.ApplicationOctetStream, MimeTypes.ApplicationHttp });
}
var streamData = new StreamData()
{
ContentType = contentType,
ETag = etag,
Content = this.Random.NextBytes(this.Random.Next(100)),
};
if (editLinkValue != null)
{
var editLink = new Uri(editLinkValue, UriKind.RelativeOrAbsolute);
if (!editLink.IsAbsoluteUri)
{
ExceptionUtilities.CheckObjectNotNull(baseAddressAnnotation, "Cannot construct absolute uri for edit link because xml:base annotation was missing");
editLink = new Uri(new Uri(baseAddressAnnotation.Value), editLinkValue);
}
streamData.EditLink = editLink.AbsoluteUri;
}
return streamData;
}
/// <summary>
/// Gets the absolute uri for the given link href value
/// </summary>
/// <param name="baseUri">The context base uri</param>
/// <param name="xmlBase">The base uri annotation from the payload</param>
/// <param name="hrefValue">The href value for the link</param>
/// <returns>The absolute uri for the link, or a relative uri if it cannot be determined</returns>
internal static Uri GetAbsoluteUriForLink(Uri baseUri, XmlBaseAnnotation xmlBase, string hrefValue)
{
var absoluteUri = new Uri(hrefValue, UriKind.RelativeOrAbsolute);
if (!absoluteUri.IsAbsoluteUri)
{
string root;
if (xmlBase != null)
{
root = xmlBase.Value;
}
else if (baseUri != null)
{
ExceptionUtilities.Assert(baseUri.IsAbsoluteUri, "baseUri was not an absolute uri. It was: '{0}'", baseUri.OriginalString);
root = baseUri.AbsoluteUri;
}
else
{
// TODO: need to be able to read xml:base from feed, cannot currently.
// just return a relative uri for now
return absoluteUri;
}
absoluteUri = new Uri(UriHelpers.ConcatenateUriSegments(root, hrefValue));
}
return absoluteUri;
}