public static DateTime?GetDate(IXmlNode el, string xpath, XmlNamespaceManager nsMgr, Uri documentUri)
{
if (el == null)
{
return(null);
}
var node = nsMgr == null
? el.SelectSingleNode(xpath)
: el.SelectSingleNodeNS(xpath, nsMgr.DefaultNamespace);
if (node == null)
{
return(null);
}
string rawDate = node.NodeValue.ToString(); // example: 2010-04-02T18:02:55Z
if (String.IsNullOrEmpty(rawDate))
{
return(null);
}
DateTime dateTime;
if (DateTime.TryParse(rawDate, CultureInfo.InvariantCulture, DateTimeStyles.None, out dateTime))
{
return(dateTime);
}
return(null);
}
private static AtomContentValue ToTextValue(IXmlNode target)
{
string type = "text";
var attrType = target.Attributes.SingleOrDefault(a => a.NodeValue == "type");
if (attrType != null)
{
type = (string)attrType.NodeValue;
}
switch (type)
{
case "html":
return(new AtomContentValue(AtomContentValueType.HTML, target.InnerText.Trim()));
case "xhtml":
{
XmlNamespaceManager nsMgr = new XmlNamespaceManager(new NameTable());
nsMgr.AddNamespace("xhtml", "http://www.w3.org/1999/xhtml");
var div = target.SelectSingleNodeNS("xhtml:div", nsMgr.ToNSMethodFormat());
if (div != null)
{
return(new AtomContentValue(AtomContentValueType.XHTML, (string)div.NodeValue));
}
else
{
return(new AtomContentValue(AtomContentValueType.XHTML, string.Empty));
}
}
default:
case "text":
return(new AtomContentValue(AtomContentValueType.Text, target.InnerText.Trim()));
}
}
public override void RemoveAllCategories(IXmlNode node, string categoryScheme, Uri documentUri)
{
XmlNamespaceManager nsMgr = new XmlNamespaceManager(new NameTable());
nsMgr.AddNamespace("dc", DC_URI);
IXmlNode category;
while (null != (category = node.SelectSingleNodeNS("dc:subject", nsMgr.ToNSMethodFormat())))
{
category.ParentNode.RemoveChild(category);
}
}
public static Uri TryGetUri(IXmlNode parentNode, string key, string ns = null)
{
return parentNode.SelectSingleNodeNS(key, ns)?.TryReadUri();
}
public static DateTime? TryGetDateTime(IXmlNode parentNode, string subNode, string ns = null)
{
return parentNode.SelectSingleNodeNS(subNode, ns)?.TryReadDateTime();
}
public static string GetUrl(IXmlNode el, string xpath, XmlNamespaceManager nsMgr, Uri documentUri)
{
if (el == null)
{
return(null);
}
var node = nsMgr == null
? el.SelectSingleNode(xpath)
: el.SelectSingleNodeNS(xpath, nsMgr.DefaultNamespace);
if (node == null)
{
return(null);
}
string rawUrl = node.NodeValue.ToString();
if (rawUrl == null || rawUrl.Length == 0)
{
return(null);
}
// optimize for common case of absolute path
if (rawUrl.StartsWith("http", StringComparison.OrdinalIgnoreCase))
{
try
{
return(UrlHelper.SafeToAbsoluteUri(new Uri(rawUrl)));
}
catch { }
}
ArrayList ancestors = new ArrayList();
var parent = node.ParentNode;
while (parent != null)
{
ancestors.Add(parent);
parent = parent.ParentNode;
}
ancestors.Reverse();
Uri uri = documentUri;
foreach (var anc in ancestors)
{
if (anc is XmlElement)
{
XmlElement baseEl = (XmlElement)anc;
if (baseEl.Attributes.Any(a => a.LocalName == "xml:base"))
{
string thisUri = baseEl.GetAttribute("xml:base");
if (uri == null)
{
uri = new Uri(thisUri);
}
else
{
uri = new Uri(uri, thisUri);
}
}
}
}
if (uri == null)
{
return(UrlHelper.SafeToAbsoluteUri(new Uri(rawUrl)));
}
else
{
return(UrlHelper.SafeToAbsoluteUri(new Uri(uri, rawUrl)));
}
}
private static AtomContentValue ToTextValue(IXmlNode node)
{
string type = (string)node.Attributes.SingleOrDefault(a => a.NodeName == "type").NodeValue;
string mode = (string)node.Attributes.SingleOrDefault(a => a.NodeName == "mode")?.NodeValue;
if (string.IsNullOrEmpty(mode))
{
mode = "xml";
}
string content;
switch (mode)
{
case "escaped":
content = node.InnerText;
break;
case "base64":
content = Encoding.UTF8.GetString(Convert.FromBase64String((string)node.NodeValue));
break;
default:
case "xml":
content = node.InnerText;
if (type == string.Empty && node.SelectSingleNode("./*") != null)
{
type = "application/xhtml+xml";
}
break;
}
AtomContentValue tv;
switch (type)
{
case "text/html":
tv = new AtomContentValue(AtomContentValueType.HTML, content);
break;
case "application/xhtml+xml":
XmlNamespaceManager nsMgr = new XmlNamespaceManager(new NameTable());
nsMgr.AddNamespace("xhtml", "http://www.w3.org/1999/xhtml");
if (mode == "xml")
{
var div = node.SelectSingleNodeNS("xhtml:div", nsMgr.ToNSMethodFormat());
if (div != null)
{
tv = new AtomContentValue(AtomContentValueType.XHTML, (string)div.NodeValue);
}
else
{
tv = new AtomContentValue(AtomContentValueType.XHTML, string.Empty);
}
}
else
{
tv = new AtomContentValue(AtomContentValueType.XHTML, content);
}
break;
default:
case "text/plain":
tv = new AtomContentValue(AtomContentValueType.Text, content);
break;
}
return(tv);
}
