/// <summary>
/// Get safe HTML from untrusted input HTML, by parsing input HTML and filtering it through a white-list of
/// permitted tags and attributes.
/// </summary>
/// <param name="bodyHtml">Input untrusted HTML (body fragment)</param>
/// <param name="baseUri">URL to resolve relative URLs against</param>
/// <param name="whitelist">White-list of permitted HTML elements</param>
/// <param name="outputSettings">Document output settings; use to control pretty-printing and entity escape modes</param>
/// <returns>Safe HTML (body fragment)</returns>
/// <see cref="Cleaner.Clean(Document)"/>
public static string Clean(string bodyHtml, string baseUri, Whitelist whitelist, OutputSettings outputSettings)
{
Document dirty = ParseBodyFragment(bodyHtml, baseUri);
Cleaner cleaner = new Cleaner(whitelist);
Document clean = cleaner.Clean(dirty);
clean.OutputSettings(outputSettings);
return clean.Body.Html();
}
/// <summary>
/// Test if the input HTML has only tags and attributes allowed by the Whitelist. Useful for form validation. The input HTML should
/// still be run through the cleaner to set up enforced attributes, and to tidy the output.
/// </summary>
/// <param name="bodyHtml">HTML to test</param>
/// <param name="whitelist">whitelist to test against</param>
/// <returns>true if no tags or attributes were removed; false otherwise</returns>
/// <seealso cref="Clean(string, NSoup.Safety.Whitelist)"/>
public static bool IsValid(string bodyHtml, Whitelist whitelist)
{
Document dirty = ParseBodyFragment(bodyHtml, string.Empty);
Cleaner cleaner = new Cleaner(whitelist);
return cleaner.IsValid(dirty);
}
public void handlesFramesets()
{
String dirty = "<html><head><script></script><noscript></noscript></head><frameset><frame src=\"foo\" /><frame src=\"foo\" /></frameset></html>";
String clean = NSoupClient.Clean(dirty, Whitelist.Basic);
Assert.AreEqual("", clean); // nothing good can come out of that
Document dirtyDoc = NSoupClient.Parse(dirty);
Document cleanDoc = new Cleaner(Whitelist.Basic).Clean(dirtyDoc);
Assert.IsFalse(cleanDoc == null);
Assert.AreEqual(0, cleanDoc.Body.ChildNodes.Count);
}
