/// <summary>
///
/// </summary>
/// <param name="entryEl"></param>
/// <param name="nsMgr"></param>
/// <param name="rel"></param>
/// <param name="contentType">e.g. application/atom+xml</param>
/// <param name="contentSubType">e.g. "entry"</param>
/// <param name="baseUri"></param>
/// <returns></returns>
public static string GetLink(IXmlNode entryEl, XmlNamespaceManager nsMgr, string rel, string contentType, string contentSubType, Uri baseUri)
{
Debug.Assert(contentSubType == null || contentType != null, "contentSubType is only used if contentType is also provided");
string xpath = string.Format(CultureInfo.InvariantCulture,
@"atom:link[@rel='{0}']",
rel);
foreach (XmlElement link in entryEl.SelectNodesNS(xpath, nsMgr.ToNSMethodFormat()))
{
if (contentType != null)
{
string mimeType = link.GetAttribute("type");
if (mimeType == null || mimeType == "")
{
continue;
}
IDictionary mimeData = MimeHelper.ParseContentType(mimeType, true);
if (contentType != (string)mimeData[""])
{
continue;
}
if (contentSubType != null && contentSubType != (string)mimeData["type"])
{
continue;
}
}
return(XmlHelper.GetUrl(link, "@href", baseUri));
}
return("");
}
private static bool AcceptsEntry(string contentType)
{
IDictionary values = MimeHelper.ParseContentType(contentType, true);
string mainType = values[""] as string;
switch (mainType)
{
case "entry":
case "*/*":
case "application/*":
return(true);
case "application/atom+xml":
string subType = values["type"] as string;
if (subType != null)
{
subType = subType.Trim().ToUpperInvariant();
}
if (subType == "ENTRY")
{
return(true);
}
else
{
return(false);
}
default:
return(false);
}
}
private static bool AcceptsImages(string[] contentTypes)
{
bool acceptsPng = false, acceptsJpeg = false, acceptsGif = false;
foreach (string contentType in contentTypes)
{
IDictionary values = MimeHelper.ParseContentType(contentType, true);
string mainType = values[""] as string;
switch (mainType)
{
case "*/*":
case "image/*":
return(true);
case "image/png":
acceptsPng = true;
break;
case "image/gif":
acceptsGif = true;
break;
case "image/jpeg":
acceptsJpeg = true;
break;
}
}
return(acceptsPng && acceptsJpeg && acceptsGif);
}
private void ParseFeedDoc(XmlDocument xmlDoc, Uri baseUri, bool includeTitle, ref string homepageUrl, ref string title)
{
if (includeTitle)
{
XmlElement titleEl = xmlDoc.SelectSingleNode(@"atom:feed/atom:title", _nsMgr) as XmlElement;
if (titleEl != null)
{
title = _atomVer.TextNodeToPlaintext(titleEl);
}
}
foreach (XmlElement linkEl in xmlDoc.SelectNodes(@"atom:feed/atom:link[@rel='alternate']", _nsMgr))
{
IDictionary contentTypeInfo = MimeHelper.ParseContentType(linkEl.GetAttribute("type"), true);
switch (contentTypeInfo[""] as string)
{
case "text/html":
case "application/xhtml+xml":
homepageUrl = XmlHelper.GetUrl(linkEl, "@href", baseUri);
return;
}
}
}