PowerBuilder

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
zu/Oxta1rb17a6UhAK0hAPe9rb2Ec7V7a71rUpwpCL0xCJwhAOfOxta9tcatpdallM6cjMaUhK1C
IZwxELU5EK0xCLUxCN61pcacjK1rUrVaOaVKKZxCIZwxCKUxCL05CLUxAM6llO+1nMZzUr1rSrVS
KaVCGK1CGLVCEJQxCK05CLU5CIwpAKUxAK0xAM69tffWxrVrSrVaMbVKGMZKEL1CCLU5AP/v597O
xufGtcallNaljLWEa96ce9aUc717Wq1aMcZjMbVaKbVSIa1KGL1SGJw5CK1CCLVCCMZKCM5KCMZC
APfn3tbGvc57Ss5aGMZSENZaEL1KCM5SCLVCAMZKAPfezvfOte/GrdatlN6cc9aEUr1rOc5jIdZj
GL1SEM5aELVKCMZSCNZaCL1KAOfOvc57Qs5jGNZjEM5aCMZSAN5aAO/OtefGrcZjGM5jEN5rELVS
CMZaCN5jCOdrCM5aAO/Gpc5rGMZjENZrEN5jAOdrAOfe1t6MQtZ7Kd57IdZzGM5rEMZjCNZrCM5j
ANbOxu/Wve+9jPe9hO+1e+etc85zGO+EGMZrENZzEM5rCN5zCO97COdzAO/n3u+1c+ecSt6UQs57
Ie+MIdZ7GOeEGM5zEO+EELVjCOd7CO+ECOd7AO/Ope+tWuelUu+UKeeMGOeEEO+MEOeECO+EAO/G
jO+cKfeUEO+MCO+tSuecMeeUGN6MEOeMCO+UCO+tQuelOe+lMe+lKe+cGOeUEO+cEOeUCN6MAO+U
AOe9c/e1Oe+lId6UEO+cCPe9Qve1Me+lEOecCO+lCOe1Su+1OeelGO+tGPetCPetAO+9Qve1GO+1
EPe9CPe9APf37+fv5/f//+/v9/fv9+fe5+/e5869xufW3t7GzgAAACwAAAAAIAAgAAAI/wABCBxI
sKDBgwgTFgCwMKHDhwyHYWoIsWIBZsdyHaoIcaGbaNQ0ZeBYEROvV0pmCCDp8B4rZaOUcGHpcIEx
aqPMYLjHMcsCAwgxkRv3q8wLnhAdfWpmDRwqAgQFEEvHLlCZNxwfpVmkDJ04dczc3LsXQtq4XWh8
aGH48F49FDUC9UInT941W6luCUOWyQmSLST3eUnChNS4c9SooQuGDNkrIIrA1MqXr0A+AyFC4Kln
kMAQKljotJJGDZklS9PkyEHGLZu1ctbCmWvXThurfAbvHSii5kegxpYqtRpEKFnid/TSneu2LRYh
P/0Q1tJRgYOZV71UL5LEK1KiV68yVf+xgaOKmAZICd5bmA8FEyZQlMjRRAhQGQv4QQSJL8ZLFHwP
6aFIJXNIEkggcgQhwYIlKEFFGDKcEgBCBVCkByC0IAMJGnSAYsUNEmzAgw4HBJBeQisZcAswjqGh
wQeBKGIFFD0ocCJE9diyjTKRLPHBAx/cEAcdgxgx4Vg3HnSPKs4E00sNEYDwgQksQDLJIohMSJIj
ugSTCRA/ILFDCjTckUkrpYiCAEluYCMLJCsoMQUM9gjQRSSL7CLJJjmQxMw3kQChxA78IFULHIK0
MgonXyR5UAHWVBKIEmEcUJAIYxgSSSF94AZRPrgsQgUF0RmUgWpy/LFmRYdMkACAANwrWA8cbAhi
RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080707010302060306060800--

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Mime
oleobject loo_Part2
string ls_Filename
string ls_Name

li_Success = 0

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

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

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

li_Success = loo_Mime.LoadMimeFile("sampleMime2.txt")
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

// 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.
loo_Part2 = create oleobject
li_rc = loo_Part2.ConnectToNewObject("Chilkat.Mime")

li_Success = loo_Mime.PartAt(1,loo_Part2)
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    destroy loo_Part2
    return
end if

// -------------------------------
// 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.
ls_Filename = loo_Part2.GetHeaderFieldAttribute("Content-Disposition","filename")
Write-Debug "Filename: " + ls_Filename

// Because the "filename" is so often accessed, it is also available
// by accessing the "Filename" property:
Write-Debug "Filename: " + loo_Part2.Filename

// The disposition (without attributes) which in this case 
// is the string "attachment" is accessed via the Disposition property:
Write-Debug "Disposition: " + loo_Part2.Disposition

// To get the full value of the Content-Disposition header field,
// call GetHeaderField.
Write-Debug "Content-Disposition: " + loo_Part2.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
ls_Name = loo_Part2.GetHeaderFieldAttribute("Content-Type","name")
Write-Debug "Content-Type name: " + ls_Name

// Because the "name" is so often accessed, it is also available
// by accessing the "Name" property:
Write-Debug "Content-Type name: " + loo_Part2.Name

// The content-type without attributes is available in the
// ContentType property:
Write-Debug "Content-Type: " + loo_Part2.ContentType

// To get the full value of the Content-Type header field,
// call GetHeaderField.
Write-Debug "Content-Type: " + loo_Part2.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:
Write-Debug "Content-Transfer-Encoding: " + loo_Part2.Encoding
Write-Debug "Content-Transfer-Encoding: " + loo_Part2.GetHeaderField("Content-Transfer-Encoding")

Write-Debug "Finished."


destroy loo_Mime
destroy loo_Part2