/// <summary>
/// 净化富文本
/// </summary>
/// <param name="html">HTML 代码</param>
/// <returns>净化后的 HTML 代码</returns>
public static string SanitizeRichText(string html)
{
Config.HtmlEncoder = new HtmlEncoderNone();
Config.OutputFormatter = OutputFormatters.HtmlEncodingNone;
var sanitizer = new HtmlSanitizer(
new[]
{
"br", "span", "a", "img", "b", "strong", "i", "strike", "u", "p", "blockquote", "h1", "hr",
"comment", "spoiler", "table", "colgroup", "col", "thead", "tr", "th", "tbody", "td"
},
null,
new[] { "src", "alt", "width", "height", "data-non-image", "href", "style" },
null,
new[] { "text-align" });
var dom = CQ.Create(sanitizer.Sanitize(html));
foreach (var img in dom["img"])
{
if (string.IsNullOrWhiteSpace(img.Attributes["src"]))
{
img.Remove();
}
else
{
var fileName = UpyunProvider.ExtractFileName(img.Attributes["src"]);
if (string.IsNullOrWhiteSpace(fileName))
{
continue;
}
img.Attributes["article-image-src"] = $"keylol://{fileName}";
img.RemoveAttribute("src");
}
}
return(dom.Render());
}
/// <summary>
/// 如果图片属于自有存储，则提取出来替换 Schema，否则返回原图
/// </summary>
/// <param name="coverImage">封面图</param>
/// <returns>净化后的封面图</returns>
public static string SanitizeCoverImage(string coverImage)
{
var fileName = UpyunProvider.ExtractFileName(coverImage);
return(string.IsNullOrWhiteSpace(fileName) ? coverImage : $"keylol://{fileName}");
}