Swift

Save All MIME Attachments to Files

Demonstrates the Chilkat Mime.PartsToFiles method, which recursively traverses the MIME tree and saves each part having a nonempty filename parameter to a directory. The first argument is the destination directory and the second is a StringTable that receives the saved filenames.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This extracts every named attachment from a message in one call, walking the whole tree so it finds attachments nested inside multipart containers. It saves only parts that declare a filename — inline body parts without one are skipped — and reports what it wrote via the StringTable, which is handy for logging or follow-up processing. The destination directory must already exist.

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Swift


func chilkatTest() {
    var success: Bool = false

    let mime = CkoMime()!
    success = mime.loadFile(path: "qa_data/multipart_message.eml")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    //  Recursively traverse the MIME tree and save each part that has a nonempty "filename" parameter
    //  to a directory.  The 1st argument is the destination directory and the 2nd is a StringTable
    //  that receives the saved filenames.
    let savedFiles = CkoStringTable()!
    success = mime.parts(toFiles: "qa_output/attachments", st: savedFiles)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    var n: Int = savedFiles.count.intValue
    print("Saved \(n) files:")
    var i: Int
    for i = 0; i <= n - 1; i++ {
        var name: String? = savedFiles.string(at: i)
        if savedFiles.lastMethodSuccess == false {
            print("\(savedFiles.lastErrorText!)")
            return
        }

        print("\(name!)")
    }


}