(Tcl) MIME Content-Disposition Header Field

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

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load ./chilkat.dll

# 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.

set mime [new_CkMime]

# 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:
CkMime_put_Disposition $mime "attachment"
CkMime_put_Filename $mime "ghost.jpg"

# The Content-Disposition header field contains this:
#     Content-Disposition: attachment; filename="ghost.jpg"
puts [CkMime_getEntireHead $mime]
puts "-"

# If we set the entire header field..
CkMime_SetHeaderField $mime "Content-Disposition" "attachment; filename=\"zombie.jpg\""
# The Content-Disposition header field now contains this:
#     Content-Disposition: attachment; filename="zombie.jpg"
puts [CkMime_getEntireHead $mime]
puts "-"

# Notice how the Filename property has been updated
puts "Filename property: [CkMime_filename $mime]"
puts "-"

# To change a particular attribute value, set the property.
CkMime_put_Filename $mime "skeleton.jpg"
puts [CkMime_getEntireHead $mime]
puts "-"

# To remove the filename from the Content-Disposition header,
# set the property to an empty string.
CkMime_put_Filename $mime ""
puts [CkMime_getEntireHead $mime]
puts "-"

delete_CkMime $mime