Swift

Save a Related Item to Disk

Demonstrates the Chilkat Email.SaveRelatedItem method, which saves the related item at a given zero-based index to a directory. If the directory or any of its components do not exist, Chilkat creates them. This example adds a related style sheet and saves it.

Background: Related items are the inline resources (images, style sheets) an HTML email carries in its multipart/related enclosure. SaveRelatedItem writes one of them out as a file — a building block for tasks like extracting a specific embedded image, or manually unpacking a message when you want finer control than the all-in-one UnpackHtml / AspUnpack methods provide.

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func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SaveRelatedItem method, which saves the related item at a given
    //  zero-based index to a directory.  If the directory (or any of its components) does not
    //  exist, Chilkat creates it.

    let email = CkoEmail()!
    email.subject = "Save a related item"

    //  Set an HTML body that references a related style sheet by name.
    email.setHtmlBody(html: "<html><head><link rel=\"stylesheet\" href=\"styles.css\"/></head><body>Styled.</body></html>")
    email.addRelatedString2(filenameInHtml: "styles.css", str: "body { color: navy; }", charset: "utf-8")

    //  Save the related item at index 0 into the specified directory.
    success = email.saveRelatedItem(index: 0, directory: "qa_output/related")
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    print("Saved related item 0.")

    //  Note: The path "qa_output/..." is a relative local filesystem path,
    //  relative to the current working directory of the running application.

}