Classic ASP

Unzip an Email's Zip Attachments

Demonstrates the Chilkat Email.UnzipAttachments method, which unzips and replaces any Zip file attachments with their expanded contents. For example, if an email contains a single Zip holding three files, that Zip attachment is replaced by the three files as individual attachments. This example loads an email and expands its Zip attachments.

Background: Senders often bundle several files into one .zip to keep a message tidy or to compress large content. UnzipAttachments reverses that automatically, so downstream processing can work with the individual files directly rather than having to detect, extract, and re-inject archive contents. It is the inverse of ZipAttachments.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

'  Demonstrates the UnzipAttachments method, which unzips and replaces any Zip file
'  attachments with their expanded contents.  For example, a single Zip containing 3 files
'  is replaced by those 3 files as individual attachments.

set email = Server.CreateObject("Chilkat.Email")

success = email.LoadEml("qa_data/eml/with_zip_attachment.eml")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( email.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "NumAttachments before = " & email.NumAttachments) & "</pre>"

'  Expand any Zip attachments in place.
success = email.UnzipAttachments()
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( email.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "NumAttachments after = " & email.NumAttachments) & "</pre>"

'  Note: The path "qa_data/..." is a relative local filesystem path,
'  relative to the current working directory of the running application.

%>
</body>
</html>