User-264845182 posted
Hi, first you need to have the response in a byte[] array -this can be done by a simple function sending the ResponseStream through it:
private byte[] GetData(Stream input)
{
MemoryStream ms = new MemoryStream();
int read = 0;
byte[] buffer = new byte[1024];
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
return ms.ToArray();
}
This contains both ascii and binary data so you would need to first put it through a stream reader to first extract the Soap or Message text headers
MemoryStream ms = new MemoryStream(data);
StreamReader sr = new StreamReader(ms);
string txt = sr.ReadToEnd();
This will help read the response as text which will work for the first bit. Studying the text you will be able to work out the dividers and the exact characters of the dividers. The text will help find the string representations of the two boundaries
of the binary attachments. Once you know the string representations of the two boundaries, you need the binary versions of them. In my case, the first boundary had two line breaks after it, whereas the 2nd boundary had a line break and hyphens
before it...
byte[] boundary1 = System.Text.Encoding.UTF8.GetBytes(strBoundary1 + "\r\n\r\n");
byte[] boundary2 = System.Text.Encoding.UTF8.GetBytes("\r\n------" + strBoundary2);
Now that you have the two boundaries in binary, you can do a crude binary search to return the binary data between these two values, which will be the attachment.
private byte[] GetAttachmentData(byte[] data, byte[] boundary1, byte[] boundary2)
{
if (data == null || boundary1 == null || boundary2 == null)
return null;
if (boundary1.LongLength > data.LongLength)
return null;
long i, j, startIndex;
bool match;
int boundary1Pos = 0;
for (i = 0; i < data.LongLength; i++)
{
startIndex = i;
match = true;
for (j = 0; j < boundary1.LongLength; j++)
{
if (data[startIndex] != boundary1[j])
{
match = false;
break;
}
else if (startIndex < data.LongLength)
{
startIndex++;
}
}
if (match)
boundary1Pos = Convert.ToInt32(startIndex - boundary1.LongLength);
}
int pos1 = boundary1Pos + boundary1.Length;
int pos2 = data.Length - boundary2.Length;
int length = pos2 - pos1;
try
{
byte[] output = new byte[length];
Array.Copy(data, pos1, output, 0, length);
return output;
}
catch { }
return null;
}
Hope this helps, it never was an ideal solution - but at least it worked for me.
Jared
