/// <summary>
/// Detects URLs in styles.
/// </summary>
/// <param name="baseUri">The base URI.</param>
/// <param name="attributeName">Name of the attribute.</param>
/// <param name="attributeValue">The attribute value.</param>
/// <returns></returns>
private List <UriResourceInfo> ExtractStyleUrls(
Uri baseUri,
string attributeName,
string attributeValue)
{
List <UriResourceInfo> result =
new List <UriResourceInfo>();
if (string.Compare(attributeName, @"style", true) == 0)
{
if (attributeValue != null &&
attributeValue.Trim().Length > 0)
{
MatchCollection matchs = Regex.Matches(
attributeValue,
@"url\s*\(\s*([^\)\s]+)\s*\)",
RegexOptions.Singleline | RegexOptions.IgnoreCase);
if (matchs.Count > 0)
{
foreach (Match match in matchs)
{
if (match != null && match.Success)
{
string url = match.Groups[1].Value;
UriResourceInfo ui =
new UriResourceInfo(
_settings.Options,
url,
new Uri(url, UriKind.RelativeOrAbsolute),
baseUri,
UriType.Resource);
bool isOnSameSite =
ui.IsOnSameSite(baseUri);
if ((isOnSameSite ||
!_settings.Options.StayOnSite) &&
ui.IsProcessableUri)
{
result.Add(ui);
}
}
}
}
}
}
return(result);
}
/// <summary>
/// Does the extract links.
/// </summary>
/// <param name="xml">The XML.</param>
/// <param name="uriInfo">The URI info.</param>
/// <returns></returns>
private List <UriResourceInfo> DoExtractLinks(
XmlReader xml,
UriResourceInfo uriInfo)
{
List <UriResourceInfo> links = new List <UriResourceInfo>();
while (xml.Read())
{
switch (xml.NodeType)
{
// Added 2016-10-16: Inside comments, too.
case XmlNodeType.Comment:
XmlReader childXml = GetDocReader(xml.Value, uriInfo.BaseUri);
List <UriResourceInfo> childLinks = DoExtractLinks(childXml, uriInfo);
links.AddRange(childLinks);
break;
// A node element.
case XmlNodeType.Element:
string[] linkAttributeNames;
UriType linkType;
// If this is a link element, store the URLs to modify.
if (IsLinkElement(
xml.Name,
out linkAttributeNames,
out linkType))
{
while (xml.MoveToNextAttribute())
{
links.AddRange(
ExtractStyleUrls(
uriInfo.BaseUriWithFolder,
xml.Name,
xml.Value));
foreach (string a in linkAttributeNames)
{
if (string.Compare(a, xml.Name, true) == 0)
{
string url = xml.Value;
UriResourceInfo ui =
new UriResourceInfo(
_settings.Options,
url,
new Uri(url, UriKind.RelativeOrAbsolute),
uriInfo.BaseUriWithFolder,
linkType);
bool isOnSameSite =
ui.IsOnSameSite(uriInfo.BaseUri);
if ((isOnSameSite ||
!_settings.Options.StayOnSite) &&
ui.IsProcessableUri)
{
links.Add(ui);
}
}
}
}
}
else
{
// Also, look for style attributes.
while (xml.MoveToNextAttribute())
{
links.AddRange(
ExtractStyleUrls(
uriInfo.BaseUriWithFolder,
xml.Name,
xml.Value));
}
}
break;
}
}
return(links);
}