/// <summary>Decodes the form data.</summary>
/// <param name="contentType">Type of the content.</param>
/// <param name="reader">The reader.</param>
/// <exception cref="WebServerException">0 - MultiPart boundary missing!.</exception>
public void DecodeMultiPartFormData(string contentType, DataReader reader)
{
string boundary = contentType.AfterFirst("boundary").AfterFirst('"').BeforeFirst('"');
if (boundary == null || boundary.HasInvalidChars(ASCII.Strings.Printable))
{
throw new WebServerException(WebError.UnknownContent, 0, "MultiPart boundary missing!");
}
MultiPartFormData = WebMultiPart.Parse(reader, boundary.Trim());
}
/// <summary>Parses from the specified reader.</summary>
/// <param name="reader">The reader.</param>
/// <param name="boundary">The boundary.</param>
/// <returns></returns>
/// <exception cref="InvalidDataException">
/// Invalid header in multi part content!
/// or
/// Invalid data after multi part content!.
/// </exception>
public static WebMultiPart Parse(DataReader reader, string boundary)
{
boundary = "--" + boundary;
byte[] binaryBoundary = Encoding.UTF8.GetBytes(boundary);
var result = new WebMultiPart();
// first part is main content, we do not have addition headers there
bool inHeader = true;
var part = new WebSinglePart();
while (true)
{
if (inHeader)
{
string line = reader.ReadLine();
// end of header ?
if (line.Length == 0)
{
inHeader = false;
continue;
}
// boundary ?
if (line.StartsWith("--"))
{
// end of data ?
// if (line == "--") break;
// next part ?
if (line == boundary)
{
part = new WebSinglePart();
continue;
}
throw new WebServerException(WebError.UnknownContent, 0, "Invalid header in multi part content!");
}
// read header value
string[] kv = line.Split(new char[] { ':' }, 2);
if (kv.Length < 2)
{
throw new WebServerException(WebError.UnknownContent, 0, "Invalid header in multi part content!");
}
part.Headers.Add(kv[0].Trim().ToLower(), kv[1].Trim());
}
else
{
// content
byte[] buffer = new byte[1024 * 1024];
int offset = 0;
reader.ReadUntil(buffer, ref offset, false, binaryBoundary);
Array.Resize(ref buffer, offset);
part.Content = buffer;
result.Parts.Add(part);
part = new WebSinglePart();
inHeader = true;
string endOfData = reader.ReadLine();
// end of data ?
if (endOfData == "--")
{
// var empty = reader.ReadLine();
// if (empty != "") throw new CaveWebException(CaveWebError.UnknownContent, "Invalid data after end of multi part content!");
break;
}
if (endOfData.Length != 0)
{
throw new WebServerException(WebError.UnknownContent, 0, "Invalid data after multi part content!");
}
}
}
return(result);
}