PureBasic

Get a Header Field of a Related Item

Demonstrates the Chilkat Email.GetRelatedHeader method, which returns the value of a named header field of a related item. The first argument is the zero-based related-item index and the second is the MIME header-field name. This example reads the Content-Type header of a related style sheet.

Background: Each related item is a MIME part with its own header block. Where GetRelatedAttr extracts a single named parameter from a header, GetRelatedHeader returns the entire value of a header field — for example the full Content-Type or Content-Location line — which is handy for inspecting exactly how an embedded resource is described.

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IncludeFile "CkEmail.pb"

Procedure ChilkatExample()

    ;  Demonstrates the GetRelatedHeader method, which returns the value of a header field (by
    ;  name) of a related item.  The first argument is the zero-based related-item index and the
    ;  second is the MIME header-field name.

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::setCkSubject(email, "GetRelatedHeader example")

    ;  Set an HTML body and add a related style sheet (index 0).
    CkEmail::ckSetHtmlBody(email,"<html><head><link rel=" + Chr(34) + "stylesheet" + Chr(34) + " href=" + Chr(34) + "styles.css" + Chr(34) + "/></head><body>Styled.</body></html>")
    CkEmail::ckAddRelatedString2(email,"styles.css","body { color: navy; }","utf-8")

    ;  Get the Content-Type header of the first related item (index 0).
    ct.s = CkEmail::ckGetRelatedHeader(email,0,"Content-Type")
    Debug "Related item 0 Content-Type: " + ct


    CkEmail::ckDispose(email)


    ProcedureReturn
EndProcedure