In our Project we need to send a Multipart Email with an empty text and then attached a xml. The layout is

... some headers...
Content-Type: multipart/mixed; boundary=XYZ 

--XYZ
Content-type: text/plain; charset=UTF-8 

--XYZ
Content-type: application/soap+xml; charset=UTF-8 
XML
--XYZ--

So we define a route like this

@Override
    public void configure() {
        from("direct:example")
                .process(exchange -> {
                    exchange.getIn().setHeader("from", "me");
                    exchange.getIn().setHeader("to", "you");
                    exchange.getIn().setHeader("subject", "subject");
                    MimeBodyPart textBodyPart = new MimeBodyPart();
                    textBodyPart.setText("", "UTF-8");
                    MimeBodyPart xmlBodyPart = new MimeBodyPart();
                    xmlBodyPart.setContent("<tag/>", "application/soap+xml; charset=UTF-8");
                    MimeMultipart multipart = new MimeMultipart(textBodyPart, xmlBodyPart);
                    exchange.getIn().setBody(multipart);
                    exchange.getIn().setHeader(Exchange.CONTENT_TYPE, multipart.getContentType());
                })
                .to("smtp://connectionString");
    }

triggering the route leads to Missing start boundary and debugging shows, that the multipart body is not correctly set/used by camel, because when parsing the mail, the body is empty. How to setup the multipart mail correctly when working with Apache Camel?

In our Project we need to send a Multipart Email with an empty text and then attached a xml. The layout is

... some headers...
Content-Type: multipart/mixed; boundary=XYZ 

--XYZ
Content-type: text/plain; charset=UTF-8 

--XYZ
Content-type: application/soap+xml; charset=UTF-8 
XML
--XYZ--

So we define a route like this

@Override
    public void configure() {
        from("direct:example")
                .process(exchange -> {
                    exchange.getIn().setHeader("from", "me");
                    exchange.getIn().setHeader("to", "you");
                    exchange.getIn().setHeader("subject", "subject");
                    MimeBodyPart textBodyPart = new MimeBodyPart();
                    textBodyPart.setText("", "UTF-8");
                    MimeBodyPart xmlBodyPart = new MimeBodyPart();
                    xmlBodyPart.setContent("<tag/>", "application/soap+xml; charset=UTF-8");
                    MimeMultipart multipart = new MimeMultipart(textBodyPart, xmlBodyPart);
                    exchange.getIn().setBody(multipart);
                    exchange.getIn().setHeader(Exchange.CONTENT_TYPE, multipart.getContentType());
                })
                .to("smtp://connectionString");
    }

triggering the route leads to Missing start boundary and debugging shows, that the multipart body is not correctly set/used by camel, because when parsing the mail, the body is empty. How to setup the multipart mail correctly when working with Apache Camel?

• apache-camel
• apache-camel-mail
• mimemultipart

1 Answer 1

The body must be set as a string, so one hast to write the multipart to OutputStream then call .toString() on the stream.

OutputStream outputStream = new FastByteArrayOutputStream();
multipart.writeTo(outputStream);
exchange.getIn().setBody(outputStream.toString());