private string ProcessHtmlBody(string rawHtmlBody)
{
// Clear the files in temporary storage.
DirectoryInfo di = new DirectoryInfo(cidContentDirPath);
foreach (FileInfo file in di.GetFiles())
{
file.Delete();
}
foreach (DirectoryInfo dir in di.GetDirectories())
{
dir.Delete(true);
}
// Save all attachments and obtain their <cid, filePath> pairs.
this.savedCidContents.Clear();
MimeUtility.SaveBinariesWithCid(Message.Body, cidContentDirPath, this.savedCidContents);
HtmlDocument html = new HtmlDocument();
html.LoadHtml(rawHtmlBody);
var rootNode = html.DocumentNode;
var imgNodes = rootNode.Descendants("img");
// Fix all cid references with corresponding file system paths.
foreach (HtmlNode node in imgNodes)
{
string srcAttr = node.GetAttributeValue("src", null);
if (srcAttr != null)
{
Match m = Regex.Match(srcAttr, "cid:(.*)");
if (m.Success)
{
string cid = m.Groups[1].Value.Trim(' ');
if (this.savedCidContents.ContainsKey(cid))
{
node.SetAttributeValue("src", this.savedCidContents[cid]);
}
}
}
}
return(rootNode.InnerHtml);
}