Swift

Get a Related Item as Text with CRLF Line Endings

Demonstrates the Chilkat Email.GetRelatedStringCrLf method, which returns the text of a related item with CRLF (\r\n) line-endings, interpreting the item's bytes using the supplied charset. It is intended for text-based related items such as style sheets. This example reads an embedded CSS style sheet with normalized CRLF line endings.

Background: Embedded text may arrive with any style of line ending — bare LF, bare CR, or CRLF. This method normalizes them all to CRLF, which is what internet protocols and many Windows tools expect, avoiding mixed-newline problems when the text is written out or re-transmitted. It is the CRLF counterpart to GetRelatedString (which uses bare CR).

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func chilkatTest() {
    //  Demonstrates the GetRelatedStringCrLf method, which returns the text of a related item
    //  with CRLF line-endings, interpreting the bytes using the specified charset.  This is
    //  intended for text-based related items such as style sheets.  The index is zero-based.

    let email = CkoEmail()!
    email.subject = "GetRelatedStringCrLf example"

    //  The HTML references a related style sheet by name (Content-Location).
    email.setHtmlBody(html: "<html><head><link rel=\"stylesheet\" href=\"styles.css\"/></head><body>Styled.</body></html>")

    //  Add the related style sheet (index 0).
    email.addRelatedString2(filenameInHtml: "styles.css", str: "body { color: navy; }\nh1 { color: teal; }", charset: "utf-8")

    //  Get the first related item (index 0) as text with CRLF line endings.
    var content: String? = email.getRelatedStringCrLf(index: 0, charset: "utf-8")
    print("Related item 0 text (CRLF-normalized):")
    print("\(content!)")

}