Ytukyg

I am adding MIME attachments to a document like this

try{

    var d = database.getView("Main").getFirstDocument()

    var it = d.getFirstItem("Body")

    var att:NotesEmbeddedObject = it.getEmbeddedObject("mydoc.docx")

    var streamDOC:NotesStream = session.createStream()



    streamDOC.setContents(att.getInputStream())





    var newd;

    newd = database.getView("NewD").getFirstDocument()

    if(newd==null){

        newd = database.createDocument()

        newd.replaceItemValue("Form","Main")

        var me = newd.createMIMEEntity("Body")

    }else{

        var me = newd.getMIMEEntity("Body") 

    }



    var filename = "test.pdf"

    var mc = me.createChildEntity();

    var he = mc.createHeader("Content-Disposition")

    he.setHeaderVal("attachment; filename="" + filename + """);

    he = mc.createHeader("Content-ID");

    he.setHeaderVal( "<" + filename + ">" );

    mc.setContentFromBytes(streamDOC, "application/vnd.openxmlformats-officedocument.wordprocessingml.document", NotesMIMEEntity.ENC_IDENTITY_8BIT);

    newd.save()

    print("success")

}catch(e){

    print("fail " + e)

}

and in a repeat I provide a delete button

var eo = nd.getDocument().getAttachment(att)

eo.remove()

nd.save()

the attachment are removed from the document, in Ytria I can see that the $FILE items are removed but not the BODY items. the problem with this is that if I add a new attachment to the same document all the attachments I removed previously come back

This is how the document looks before removing the attachments.

The file size here is unfortnuately 0Kb because I used the wrong screenshot. from the beginnin all $File items have correct size

This is how the document look after I removed the attachments (using the script above)

This is what the document look like after I add one attachment (using the script above) after I removed them

• Could I be doing something wrong when adding or removing the attachments? (see
  script)


• It does not seem to matter if the Body field has the "store
  content as MIME" option set or not


• see also this question
  How to Add and Remove attachments using MIME
  

If you work with MIME methods to attach the file why not work with MIME methods to remove it as well?

I use my own framework so the following code might give you the impression to overcomplicate things but hopefully you should get the gist of it:

I have an enum that helps me navigate through the various MIME types. In this case you are dealing with ATTACHMENT:

public enum MimeContentType {



    ATTACHMENT("attachment") {



        @Override

        public boolean matches(String headers) {

            int score = 0;



            for (String header : headers) {

                if (header.startsWith("Content-Disposition")) {

                    score++;

                }



                if (header.contains("attachment")) {

                    score++;

                }



                if (header.contains("filename")) {

                    score++;

                }



                if (score == 3) {

                    return true;

                }

            }



            return false;

        }



    },

    TEXT("text"),

    TEXT_HTML("text/html"),

    TEXT_PLAIN("text/plain");



    private final String type;



    private MimeContentType(String type) {

        this.type = type;

    }



    public boolean matches(String headers) {

        for (String header : headers) {

            if (header.startsWith("Content-Type") && header.contains(type)) {

                return true;

            }

        }



        return false;

    }



}

Then some helper classes:

@FunctionalInterface

public interface ThrowableConsumer<T> extends Consumer<T> {



    @Override

    default void accept(final T t) {

        try {

            acceptOrThrow(t);

        } catch (final Throwable e) {

            throw new RuntimeException(e);

        }

    }



    void acceptOrThrow(T t) throws Throwable;



}



@FunctionalInterface

public interface ThrowableFunction<T, R> extends Function<T, R> {



    @Override

    default R apply(T t) {

        try {

            return applyOrThrow(t);

        } catch (final Throwable e) {

            throw new RuntimeException(e);

        }

    }



    R applyOrThrow(T t) throws Throwable;



}



@FunctionalInterface

public interface ThrowablePredicate<T> extends Predicate<T> {



    @Override

    default boolean test(T t) {

        try {

            return testOrThrow(t);

        } catch (final Throwable e) {

            throw new RuntimeException(e);

        }

    }



    boolean testOrThrow(T t) throws Throwable;



}



@FunctionalInterface

public interface ThrowableSupplier<T> extends Supplier<T> {



    @Override

    default T get() {

        try {

            return getOrThrow();

        } catch (final Throwable e) {

            throw new RuntimeException(e);

        }

    }



    T getOrThrow() throws Throwable;



}



public enum DominoUtil {

    ;



    private static final Vector<String> MIME_FILTERED_HEADERS = new Vector<>();



    static {

        MIME_FILTERED_HEADERS.add("Content-Type");

        MIME_FILTERED_HEADERS.add("Content-Disposition");

    }



    public static List<MIMEEntity> getMimeEntitiesByContentType(MIMEEntity entity,

            MimeContentType contentType) throws NotesException {

        Objects.requireNonNull(entity, "Entity cannot be null");

        Objects.requireNonNull(contentType, "Content type cannot be null");



        List<MIMEEntity> subentities = new ArrayList<>();

        MIMEEntity nextEntity = null;



        try {

            nextEntity = entity.getNextEntity();



            while (nextEntity != null) {

                String entityFilteredHeaders = nextEntity

                        .getSomeHeaders(MIME_FILTERED_HEADERS, true)

                        .split("\n");



                if (contentType.matches(entityFilteredHeaders)) {

                    subentities.add(nextEntity);

                }



                nextEntity = nextEntity.getNextEntity();

            }

        } finally {

            DominoUtil.recycle(nextEntity);

        }



        return subentities;

    }



    public final static MIMEEntity getMimeEntity(Document doc, String itemName,

            boolean createOnFail) throws NotesException {

        if (itemName == null) {

            throw new NullPointerException("Invalid MIME entity item name");

        }



        MIMEEntity mimeEntity = doc.getMIMEEntity(itemName);



        if (mimeEntity == null) {

            if (doc.hasItem(itemName)) {

                doc.removeItem(itemName);

            }



            if (createOnFail) {

                mimeEntity = doc.createMIMEEntity(itemName);

            }

        }



        return mimeEntity;

    }



    public static Optional<String> getMimeEntityAttachmentFilename(MIMEEntity entity) throws NotesException {

        Objects.requireNonNull(entity, "Entity cannot be null");



        return getMimeEntityHeaderValAndParams(

                entity, (ThrowablePredicate<MIMEHeader>) h -> h.getHeaderVal().equals("attachment"))

                        .map(s -> {

                            Matcher m = Pattern.compile("filename=['"]?([^'"\s]+)").matcher(s);

                            m.find();

                            return m.group(1);

                        });

    }



    public static Optional<String> getMimeEntityHeaderValAndParams(

            MIMEEntity entity, Predicate<MIMEHeader> matcher) throws NotesException {

        Objects.requireNonNull(entity, "Entity cannot be null");

        Objects.requireNonNull(matcher, "Matcher cannot be null");



        Vector<?> headers = entity.getHeaderObjects();



        try {

            return headers

                    .stream()

                    .map(MIMEHeader.class::cast)

                    .filter(matcher)

                    .map((ThrowableFunction<MIMEHeader, String>) MIMEHeader::getHeaderValAndParams)

                    .findFirst();

        } finally {

            recycle(headers);

        }

    }



    public static void recycle(Base... bases) {

        for (Base base : bases) {

            if (base != null) {

                try {

                    base.recycle();

                } catch (Exception e) {

                    // Do nothing

                }

            }

        }

    }



    public static void recycle(Collection<? extends Object> objs) {

        objs.stream()

                .filter(o -> o instanceof Base)

                .map(o -> (Base) o)

                .forEach(DominoUtil::recycle);

    }



}

Finally the method that would do the job:

public class Example {



    public static void yourEntryPoint() {

        try {

            // The last param is just a way to create an attachment from text

            // You have InputStream to pass along obviously

            addAttachment(doc, "Body", "fake1.txt", "this is fake text1");

            addAttachment(doc, "Body", "fake2.txt", "this is fake text2");

            addAttachment(doc, "Body", "fake3.txt", "this is fake text3");

            removeAttachment(doc, "Body", "fake2.txt");

            removeAttachment(doc, "Body", "fake3.txt");



        } catch (NotesException e) {

            throw new RuntimeException(e);

        }

    }



    private static void addAttachment(Document doc, String itemName, String fileName, String data)

            throws NotesException {

        MIMEEntity mimeEntity = null;

        Stream stm = null;



        try {

            mimeEntity = DominoUtil.getMimeEntity(doc, itemName, true);



            Optional<MIMEEntity> optAttEntity = getAttachmentMimeEntity(mimeEntity, fileName);



            MIMEEntity attachmentEntity = null;



            if (optAttEntity.isPresent()) {

                attachmentEntity = optAttEntity.get();

            } else {

                attachmentEntity = mimeEntity.createChildEntity();

                MIMEHeader header = attachmentEntity.createHeader("Content-Disposition");

                header.setHeaderValAndParams("attachment; filename="" + fileName + """);

            }



            stm = doc.getParentDatabase().getParent().createStream();

            stm.writeText(data);



            attachmentEntity.setContentFromBytes(stm,

                    "application/octet-stream",

                    MIMEEntity.ENC_IDENTITY_BINARY);



            stm.close();



            doc.closeMIMEEntities(true, itemName);

        } finally {

            DominoUtil.recycle(stm);

            DominoUtil.recycle(mimeEntity);

        }

    }



    private static void removeAttachment(Document doc, String itemName, String fileName)

            throws NotesException {

        MIMEEntity mimeEntity = null;



        try {

            // Get MIME entity

            mimeEntity = DominoUtil.getMimeEntity(doc, itemName, true);



            Optional<MIMEEntity> optAttEntity = getAttachmentMimeEntity(mimeEntity, fileName);



            if (!optAttEntity.isPresent()) {

                return;

            }



            optAttEntity.get().remove();



            // Header cleaning on empty entity

            if (mimeEntity.getFirstChildEntity() != null) {

                doc.closeMIMEEntities(true, itemName);

            } else {

                mimeEntity.remove();

            }

        } finally {

            DominoUtil.recycle(mimeEntity);

        }

    }



    private static Optional<MIMEEntity> getAttachmentMimeEntity(MIMEEntity root, String fileName)

            throws NotesException {

        return DominoUtil

                .getMimeEntitiesByContentType(root, MimeContentType.ATTACHMENT)

                .stream()

                .filter((ThrowablePredicate<MIMEEntity>) mime -> {

                    Optional<String> opt = DominoUtil.getMimeEntityAttachmentFilename(mime);



                    return opt.isPresent() && opt.get().equals(fileName);

                })

                .findFirst();

    }



}