private MimePart ParseHeader()
{
MimePart result = new MimePart();
// header is terminated by an empty line.
string line = ReadLine();
while (line != null && line != "")
{
if (line.StartsWith(ContentTypePrefix, StringComparison.InvariantCultureIgnoreCase))
{
ParseContentType(result, line.Substring(ContentTypePrefix.Length).Trim());
}
else if (line.StartsWith(ContentEncodingPrefix, StringComparison.InvariantCultureIgnoreCase))
{
result.ContentEncoding = line.Substring(ContentEncodingPrefix.Length).Trim();
}
else if (line.StartsWith(ContentLocationPrefix, StringComparison.InvariantCultureIgnoreCase))
{
result.ContentLocation = line.Substring(ContentLocationPrefix.Length).Trim();
}
else if (line.StartsWith(ContentIdPrefix, StringComparison.InvariantCultureIgnoreCase))
{
result.ContentLocation = line.Substring(ContentIdPrefix.Length).Trim();
}
else if (line.StartsWith(ContentDescriptionPrefix, StringComparison.InvariantCultureIgnoreCase))
{
result.ContentLocation = line.Substring(ContentDescriptionPrefix.Length).Trim();
}
else
{
// ignore unknown headers.
}
line = ReadLine();
}
return(result);
}
private bool FixHtmlLinks(MimePart part)
{
bool save = false;
bool changed = false;
var doc = part.HtmlDocument;
// find any "a" tags with "href" attributes and fix them.
foreach (XElement anchor in doc.Descendants(doc.Root.Name.Namespace + "a"))
{
string href = (string)anchor.Attribute("href");
string newhref = MapUrl(href);
if (href != newhref)
{
anchor.SetAttributeValue("href", System.Uri.EscapeUriString(newhref));
changed = true;
}
}
if (changed)
{
part.Body = doc.ToString();
save = true;
}
return(save);
}
public void ParseContentType(MimePart part, string s)
{
int i = s.IndexOf('/');
if (i < 0)
{
Error("Malformed content type missing subtype after '/'");
}
part.Type = s.Substring(0, i).Trim();
s = s.Substring(i + 1);
i = s.IndexOf(';');
if (i < 0)
{
part.SubType = s.Trim();
return;
}
else
{
part.SubType = s.Substring(0, i).Trim();
}
// parameters: attribute "=" value
while (i >= 0)
{
s = s.Substring(i + 1);
i = s.IndexOf('=');
if (i < 0)
{
Error(part.Type + " parameter missing equals '='");
}
string paramName = s.Substring(0, i).Trim();
bool quoted = false;
s = s.Substring(i + 1);
string paramValue = s.Trim();
if (paramValue.Length > 1 && paramValue[0] == '"')
{
quoted = true;
// quoted value.
int endQuote = paramValue.IndexOf('"', 1);
if (endQuote > 0)
{
s = paramValue.Substring(endQuote + 1);
paramValue = paramValue.Substring(1, endQuote - 1);
}
else
{
Error("Missing end quote on value for parameter " + paramName);
}
}
i = s.IndexOf(';');
if (!quoted && i >= 0)
{
paramValue = paramValue.Substring(0, i).Trim();
}
part.ContentTypeParameters.Add(paramName, paramValue);
}
}
