Parse MIME Header Fields

Demonstrates how to parse MIME header fields, including Content-Type, Content-Disposition, and Content-Transfer-Encoding.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800"

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif"
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif"
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P/0Q1tJRgYOZV71UL5LEK1KiV68yVf+xgaOKmAZICd5bmA8FEyZQlMjRRAhQGQv4QQSJL8ZLFHwP
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ugSTCRA/ILFDCjTckUkrpYiCAEluYCMLJCsoMQUM9gjQRSSL7CLJJjmQxMw3kQChxA78IFULHIK0
MgonXyR5UAHWVBKIEmEcUJAIYxgSSSF94AZRPrgsQgUF0RmUgWpy/LFmRYdMkACAANwrWA8cbAhi
RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080707010302060306060800--

Download Chilkat MIME ActiveX

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set mime = Server.CreateObject("Chilkat.Mime")

success = mime.UnlockComponent("Anything for 30-day trial.")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"

End If

'  Load the sampleMime2.txt file into the MIME object.
'  (This file is available at http://www.chilkatsoft.com/testData/sampleMime2.txt )

success = mime.LoadMimeFile("sampleMime2.txt")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"

End If

'  The GIF image is the 2nd sub-part located directly under the
'  top-level MIME node.  Indexing begins at 0, therefore the 2nd
'  sub-part is at index 1.

' part2 is a Chilkat.Mime
Set part2 = mime.GetPart(1)

'  -------------------------------
'  Content-Disposition
'  -------------------------------
'  In this example, the Content-Disposition header field
'  contains this value:
'  attachment; filename="starfish.gif"

'  To get the "filename", call GetHeaderFieldAttribute
'  Header field names and attribute names are case insensitive.
filename = part2.GetHeaderFieldAttribute("Content-Disposition","filename")
Response.Write "<pre>" & Server.HTMLEncode( "Filename: " _
     & filename) & "</pre>"

'  Because the "filename" is so often accessed, it is also available
'  by accessing the "Filename" property:
Response.Write "<pre>" & Server.HTMLEncode( "Filename: " _
     & part2.Filename) & "</pre>"

'  The disposition (without attributes) which in this case
'  is the string "attachment" is accessed via the Disposition property:
Response.Write "<pre>" & Server.HTMLEncode( "Disposition: " _
     & part2.Disposition) & "</pre>"

'  To get the full value of the Content-Disposition header field,
'  call GetHeaderField.
Response.Write "<pre>" & Server.HTMLEncode( "Content-Disposition: " _
     & part2.GetHeaderField("Content-Disposition")) & "</pre>"

'  -------------------------------
'  Content-Type
'  -------------------------------
'  In this example, the Content-Type header field
'  contains this value:
'  image/gif; name="starfish.gif"

'  To get the "name", call GetHeaderFieldAttribute
name = part2.GetHeaderFieldAttribute("Content-Type","name")
Response.Write "<pre>" & Server.HTMLEncode( "Content-Type name: " _
     & name) & "</pre>"

'  Because the "name" is so often accessed, it is also available
'  by accessing the "Name" property:
Response.Write "<pre>" & Server.HTMLEncode( "Content-Type name: " _
     & part2.Name) & "</pre>"

'  The content-type without attributes is available in the
'  ContentType property:
Response.Write "<pre>" & Server.HTMLEncode( "Content-Type: " _
     & part2.ContentType) & "</pre>"

'  To get the full value of the Content-Type header field,
'  call GetHeaderField.
Response.Write "<pre>" & Server.HTMLEncode( "Content-Type: " _
     & part2.GetHeaderField("Content-Type")) & "</pre>"

'  -------------------------------
'  Content-Transfer-Encoding
'  -------------------------------

'  The Encoding property contains the value of the
'  Content-Transfer-Encoding property.
'  Calling GetHeaderField("Content-Transfer-Encoding") is
'  equivalent to accessing the Encoding property:
Response.Write "<pre>" & Server.HTMLEncode( "Content-Transfer-Encoding: " _
     & part2.Encoding) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Content-Transfer-Encoding: " _
     & part2.GetHeaderField("Content-Transfer-Encoding")) & "</pre>"

Response.Write "<pre>" & Server.HTMLEncode("Finished.") & "</pre>"


%>
</body>
</html>