private async Task SaveFilesToDisk(Post post)
{
var imgRegex = new Regex("<img[^>].+ />", RegexOptions.IgnoreCase | RegexOptions.Compiled);
var base64Regex = new Regex("data:[^/]+/(?<ext>[a-z]+);base64,(?<base64>.+)", RegexOptions.IgnoreCase);
foreach (Match match in imgRegex.Matches(post.Content))
{
XmlDocument doc = new XmlDocument();
doc.LoadXml("<root>" + match.Value + "</root>");
var img = doc.FirstChild.FirstChild;
var srcNode = img.Attributes["src"];
var fileNameNode = img.Attributes["data-filename"];
// The HTML editor creates base64 DataURIs which we'll have to convert to image files on disk
if (srcNode != null && fileNameNode != null)
{
var base64Match = base64Regex.Match(srcNode.Value);
if (base64Match.Success)
{
byte[] bytes = Convert.FromBase64String(base64Match.Groups["base64"].Value);
srcNode.Value = await _blog.SaveFile(bytes, fileNameNode.Value).ConfigureAwait(false);
var newContent = post.Content.Replace(match.Value, img.OuterXml);
img.Attributes.Remove(fileNameNode);
post = PostModule.WithContent(newContent, post);
}
}
}
}
