Java

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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Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Mime;
import com.chilkatsoft.chilkat2.StringTable;

public class ChilkatExample {

    public static void main(String[] args) {
        Mime mime = new Mime();
        try {
            mime.loadMimeFile("qa_data/multipart_message.eml");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.
        StringTable savedFiles = new StringTable();
        try {
            mime.partsToFiles("qa_output/attachments", savedFiles);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        int n = savedFiles.getCount();
        System.out.println("Saved " + n + " files:");
        for (int i = 0; i < n; i++) {
            String name;
            try {
                name = savedFiles.stringAt(i);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            System.out.println(name);
        }
    }
}