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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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkMime mime = new CkMime();
    success = mime.LoadMimeFile("qa_data/multipart_message.eml");
    if (success == false) {
        System.out.println(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.
    CkStringTable savedFiles = new CkStringTable();
    success = mime.PartsToFiles("qa_output/attachments",savedFiles);
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
        }

    int n = savedFiles.get_Count();
    System.out.println("Saved " + n + " files:");
    int i;
    for (i = 0; i <= n - 1; i++) {
        String name = savedFiles.stringAt(i);
        if (savedFiles.get_LastMethodSuccess() == false) {
            System.out.println(savedFiles.lastErrorText());
            return;
            }

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