VB.NET Requires Chilkat v11.0.0+

Extract Files from Binary SOAP MTOM MIME

See more MIME Examples

This example demonstrates how to extract files from a binary SOAP MTOM MIME document. VB.NET

Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim mime As New Chilkat.Mime

'  In this example, we have a MIME file containing 8bit (non-encoded) binary data,
'  and it is what I call "headless".  MIME is headless when it omits
'  the top-level header.  The file we have here begins with the first
'  boundary string.

'  The structure the MIME to be loaded is:

'  multipart/mixed (inferred because it is headless)
'      application/xop+xml
'      image/jpeg
'      image/gif
'      image/gif
'  

success = mime.LoadMimeFile("qa_data/mime/headless_binary_soap_mtom_mime.mim")
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


'  The MIME file loaded in this example contains this:

'  --uuid:e74486f4-52b0-44b6-b829-156810fae20d
'  Content-Type: application/xop+xml; charset=UTF-8; type="application/soap+xml"
'  Content-Transfer-Encoding: binary
'  Content-ID: <root.message@cxf.apache.org>
'  
'  <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Body> ... </soap:Body></soap:Envelope>
'  --uuid:e74486f4-52b0-44b6-b829-156810fae20d
'  Content-Type: image/jpeg
'  Content-Transfer-Encoding: binary
'  Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1496@cxf.apache.org>
'  Content-Disposition: attachment;name="-2049913191"
'  
'  BINARY DATA HERE...
'  
'  --uuid:e74486f4-52b0-44b6-b829-156810fae20d
'  Content-Type: image/gif
'  Content-Transfer-Encoding: binary
'  Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1497@cxf.apache.org>
'  Content-Disposition: attachment;name="-2049913188"
'  
'  BINARY DATA HERE...
'  
'  --uuid:e74486f4-52b0-44b6-b829-156810fae20d
'  Content-Type: image/gif
'  Content-Transfer-Encoding: binary
'  Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1498@cxf.apache.org>
'  Content-Disposition: attachment;name="-2049913185"
'  
'  BINARY DATA HERE...
'  
'  --uuid:e74486f4-52b0-44b6-b829-156810fae20d--

'  Get the number of MIME sub-parts.
Dim numParts As Integer = mime.NumParts

'  The 1st part at index 0 is the application/xop+xml.  We're just going to extract the JPG and GIF image files..
Dim sbFilename As New Chilkat.StringBuilder
Dim name As String
Dim i As Integer = 1
Dim mp As New Chilkat.Mime
While i < numParts

    mime.PartAt(i,mp)

    '  By looking at the MIME above, the "name" attribute of the Content-Disposition header field seems
    '  to be the only possible name we can use for each image..
    sbFilename.Append("qa_output/")
    name = mp.GetHeaderFieldAttribute("Content-Disposition","name")
    sbFilename.Append(name)
    sbFilename.Append(".")
    sbFilename.Append(mp.ContentType)
    Dim numReplaced As Integer = sbFilename.Replace("image/","")
    mp.SaveBody(sbFilename.GetAsString())
    Debug.WriteLine("output file: " & sbFilename.GetAsString())
    sbFilename.Clear()
    i = i + 1
End While

Debug.WriteLine("Success.")