(Visual FoxPro) MIME Content-Disposition Header Field

Explains the Content-Disposition header field and the properties used for setting or updating.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loMime

* The Content-Disposition header field provides a suggestion to the receiver for how the content is to be processed.
* The standard dispositions are "inline" and "attachment".  

* A disposition of "attachment" indicates the content is something to be saved to a file and not processed (such as rendering for viewing inline).
* A disposition of "inline" indicates the content should be processed (displayed) inline with the other parts of the MIME message.

* For example, an email client could handle a JPG image based on the disposition.  If the disposition is "attachment",
* the email client (such as Thunderbird, GMail, or Outlook) might simply list the JPG image as one of the email's attachments,
* but won't display the JPG image.  If the disposition is "inline", the email client might display the JPG image, but not list
* it as an attachment.

* The Content-Disposition header field can also include a "filename" attribute.  This is the suggested default filename if the content
* is to be saved to a file.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Mime')
loMime = CreateObject('Chilkat.Mime')

* The Content-Disposition header field can be set or modified in two ways.
* 1) By setting the Disposition and Filename properties.

* 2) By setting the entire contents of the Content-Disposition header with the SetHeaderField method.
*    Setting the Content-Disposition header automatically updates the Disposition and Filename properties.

* For example:
loMime.Disposition = "attachment"
loMime.Filename = "ghost.jpg"

* The Content-Disposition header field contains this:
*     Content-Disposition: attachment; filename="ghost.jpg"
? loMime.GetEntireHead()
? "-"

* If we set the entire header field..
loMime.SetHeaderField("Content-Disposition",'attachment; filename="zombie.jpg"')
* The Content-Disposition header field now contains this:
*     Content-Disposition: attachment; filename="zombie.jpg"
? loMime.GetEntireHead()
? "-"

* Notice how the Filename property has been updated
? "Filename property: " + loMime.Filename
? "-"

* To change a particular attribute value, set the property.
loMime.Filename = "skeleton.jpg"
? loMime.GetEntireHead()
? "-"

* To remove the filename from the Content-Disposition header,
* set the property to an empty string.
loMime.Filename = ""
? loMime.GetEntireHead()
? "-"

RELEASE loMime