public static async Task <string> ReadLineAsync(ISharedBufferStream stream, MemoryStream stringBuffer)
{
bool cr = false;
int used = 0;
ArraySegment <byte> segment = await stream.SharedBufferReadAsync(Int32.MaxValue);
if (segment.Count == 0)
{
return(null);
}
while (!ReadLine(segment, stringBuffer, ref cr, out used))
{
segment = await stream.SharedBufferReadAsync(Int32.MaxValue);
if (segment.Count == 0)
{
return(null);
}
}
if (used != segment.Count)
{
stream.SharedBufferRewind(segment.Count - used);
}
return(Encoding.UTF8.GetString(stringBuffer.GetBuffer(), 0, (int)stringBuffer.Length));
}
public MultipartReader(Stream stream, string boundary)
{
this.stream = stream as ISharedBufferStream;
if (this.stream == null)
{
this.stream = new LengthLimitedStream(stream, Int64.MaxValue);
}
this.boundary = boundary;
}
public static async Task <bool> ReadHeadersAsync(ISharedBufferStream stream, Dictionary <string, string> headers)
{
bool flushNeeded = false;
string line = null;
while (true)
{
string line2 = await ReadLineAsync(stream);
if (line2 == null)
{
throw new Exception("Invalid headers");
}
else if (line2.StartsWith(" ") || line2.StartsWith("\t"))
{
if (line == null)
{
line = line2;
}
else
{
line += line2;
}
line2 = null;
}
else
{
flushNeeded = true;
}
// flush previous line
if (flushNeeded)
{
if (line != null)
{
int pos = line.IndexOf(':');
if ((pos == -1) || (pos == 0))
{
throw new Exception("Invalid mime header line. Missing ':'");
}
string key = line.Substring(0, pos).ToLower();
string content = line.Substring(pos + 2, line.Length - (pos + 2));
headers[key] = HttpUtility.QuotedPrintableDecode(content);
}
line = line2;
}
if (line == String.Empty)
{
return(true);
}
}
}
public BoundaryStream(ISharedBufferStream stream, string boundary)
{
this.stream = stream;
boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary);
}
public static Task <string> ReadLineAsync(ISharedBufferStream stream)
{
return(ReadLineAsync(stream, new MemoryStream(128)));
}
