Save All MIME Attachments to Files

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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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    success := false

    mime := chilkat.NewMime()
    success = mime.LoadMimeFile("qa_data/multipart_message.eml")
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        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.
    savedFiles := chilkat.NewStringTable()
    success = mime.PartsToFiles("qa_output/attachments",savedFiles)
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        savedFiles.DisposeStringTable()
        return
    }

    n := savedFiles.Count()
    fmt.Println("Saved ", n, " files:")
    var i int
    for i = 0; i <= n - 1; i++ {
        name := savedFiles.StringAt(i)
        if savedFiles.LastMethodSuccess() == false {
            fmt.Println(savedFiles.LastErrorText())
            mime.DisposeMime()
            savedFiles.DisposeStringTable()
            return
        }

        fmt.Println(*name)
    }


    mime.DisposeMime()
    savedFiles.DisposeStringTable()