Visual FoxPro

Parse MIME Header Fields

See more MIME Examples

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";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
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--------------080707010302060306060800--

Visual FoxPro

LOCAL lnSuccess
LOCAL loMime
LOCAL loPart2
LOCAL lcFilename
LOCAL lcName

lnSuccess = 0

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loMime = CreateObject('Chilkat.Mime')

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

lnSuccess = loMime.LoadMimeFile("sampleMime2.txt")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

* 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.
loPart2 = CreateObject('Chilkat.Mime')
lnSuccess = loMime.PartAt(1,loPart2)
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loPart2
    CANCEL
ENDIF

* -------------------------------
* 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.
lcFilename = loPart2.GetHeaderFieldAttribute("Content-Disposition","filename")
? "Filename: " + lcFilename

* Because the "filename" is so often accessed, it is also available
* by accessing the "Filename" property:
? "Filename: " + loPart2.Filename

* The disposition (without attributes) which in this case 
* is the string "attachment" is accessed via the Disposition property:
? "Disposition: " + loPart2.Disposition

* To get the full value of the Content-Disposition header field,
* call GetHeaderField.
? "Content-Disposition: " + loPart2.GetHeaderField("Content-Disposition")

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

* To get the "name", call GetHeaderFieldAttribute
lcName = loPart2.GetHeaderFieldAttribute("Content-Type","name")
? "Content-Type name: " + lcName

* Because the "name" is so often accessed, it is also available
* by accessing the "Name" property:
? "Content-Type name: " + loPart2.Name

* The content-type without attributes is available in the
* ContentType property:
? "Content-Type: " + loPart2.ContentType

* To get the full value of the Content-Type header field,
* call GetHeaderField.
? "Content-Type: " + loPart2.GetHeaderField("Content-Type")

* -------------------------------
* 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:
? "Content-Transfer-Encoding: " + loPart2.Encoding
? "Content-Transfer-Encoding: " + loPart2.GetHeaderField("Content-Transfer-Encoding")

? "Finished."

RELEASE loMime
RELEASE loPart2