PowerBuilder

MIME Content-Disposition Header Field

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

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Mime

li_Success = 0

// 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.

loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat.Mime")
if li_rc < 0 then
    destroy loo_Mime
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// 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:
loo_Mime.Disposition = "attachment"
loo_Mime.Filename = "ghost.jpg"

// The Content-Disposition header field contains this:
//     Content-Disposition: attachment; filename="ghost.jpg"
Write-Debug loo_Mime.GetEntireHead()
Write-Debug "-"

// If we set the entire header field..
loo_Mime.SetHeaderField("Content-Disposition","attachment; filename=~"zombie.jpg~"")
// The Content-Disposition header field now contains this:
//     Content-Disposition: attachment; filename="zombie.jpg"
Write-Debug loo_Mime.GetEntireHead()
Write-Debug "-"

// Notice how the Filename property has been updated
Write-Debug "Filename property: " + loo_Mime.Filename
Write-Debug "-"

// To change a particular attribute value, set the property.
loo_Mime.Filename = "skeleton.jpg"
Write-Debug loo_Mime.GetEntireHead()
Write-Debug "-"

// To remove the filename from the Content-Disposition header,
// set the property to an empty string.
loo_Mime.Filename = ""
Write-Debug loo_Mime.GetEntireHead()
Write-Debug "-"


destroy loo_Mime