Of course, the code above doesn't need to be run in mail handler
servlet :-)

On Nov 19, 12:01 am, mably <[email protected]> wrote:
> I've written a simple class sending an HTML email with an embedded
> image (cf. below) via GMail SMTP.  It works perfectly fine when run
> locally from Eclipse.
>
> The same code in a GAE mail servlet handler produce the infamous
> "Converting attachment data failed" error.
>
> So it really seems to be a problem in GAE javamail implementation.
>
> /*
>  * Copyright (C) 2009 Francois Masurel
>  *
>  * This program is free software: you can redistribute it and/or
> modify
>  * it under the terms of the GNU General Public License as published
> by
>  * the Free Software Foundation, either version 3 of the License, or
>  * any later version.
>  *
>  * This program is distributed in the hope that it will be useful,
>  * but WITHOUT ANY WARRANTY; without even the implied warranty of
>  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>  * GNU General Public License for more details.
>  *
>  * You should have received a copy of the GNU General Public License
>  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
>
>  */
>
> import java.io.ByteArrayOutputStream;
> import java.io.IOException;
> import java.io.InputStream;
> import java.util.Properties;
>
> import javax.mail.Message;
> import javax.mail.Multipart;
> import javax.mail.Session;
> import javax.mail.Transport;
> import javax.mail.internet.InternetAddress;
> import javax.mail.internet.MimeBodyPart;
> import javax.mail.internet.MimeMessage;
> import javax.mail.internet.MimeMultipart;
>
> /**
>  * @author Francois
>  *
>  */
> public class GMailSMTP {
>
>     private static final String SMTP_HOST_NAME = "smtp.gmail.com";
>     private static final int SMTP_HOST_PORT = 465;
>     private static final String SMTP_AUTH_USER = "[email protected]";
>     private static final String SMTP_AUTH_PWD  = "yyy";
>
>     public static void main(String[] args) throws Exception{
>        new GMailSMTP().test();
>     }
>
>     public void test() throws Exception{
>         Properties props = new Properties();
>
>         props.put("mail.transport.protocol", "smtps");
>         props.put("mail.smtps.host", SMTP_HOST_NAME);
>         props.put("mail.smtps.auth", "true");
>         // props.put("mail.smtps.quitwait", "false");
>
>         String from = SMTP_AUTH_USER;
>         String to = SMTP_AUTH_USER;
>         String subject = "Testing SMTP-SSL";
>         String htmlText = "<h1>Hello</h1><img src=\"cid:image\">";
>         byte[] imgData = this.obtainByteData("enveloppe.gif");
>
>         Session mailSession = Session.getDefaultInstance(props);
>         mailSession.setDebug(true);
>
>         Message msg = new MimeMessage(mailSession);
>         msg.setFrom(new InternetAddress(from));
>         msg.addRecipient(Message.RecipientType.TO, new InternetAddress
> (to));
>         msg.setSubject(subject);
>
>         Multipart mp = new MimeMultipart("related");
>
>         MimeBodyPart htmlPart = new MimeBodyPart();
>         htmlPart.setContent(htmlText, "text/html");
>         mp.addBodyPart(htmlPart);
>
>         MimeBodyPart attachment = new MimeBodyPart();
>         attachment.setFileName("test.gif");
>         attachment.setContent(imgData, "image/gif");
>         attachment.setHeader("Content-ID","<image>");
>         mp.addBodyPart(attachment);
>
>         msg.setContent(mp);
>
>         Transport transport = mailSession.getTransport();
>
>         transport.connect
>           (SMTP_HOST_NAME, SMTP_HOST_PORT, SMTP_AUTH_USER,
> SMTP_AUTH_PWD);
>
>         transport.sendMessage(msg,
>             msg.getRecipients(Message.RecipientType.TO));
>
>         transport.close();
>     }
>
>     /**
>      * Constructs a byte array and fills it with data that is read
> from the
>      * specified resource.
>      * @param filename the path to the resource
>      * @return the specified resource as a byte array
>      * @throws java.io.IOException if the resource cannot be read, or
> the
>      *   bytes cannot be written, or the streams cannot be closed
>      */
>     private byte[] obtainByteData(String filename) throws IOException
> {
>         InputStream inputStream = getClass().getResourceAsStream
> (filename);
>         ByteArrayOutputStream outputStream = new ByteArrayOutputStream
> (1024);
>         byte[] bytes = new byte[512];
>
>         // Read bytes from the input stream in bytes.length-sized
> chunks and write
>         // them into the output stream
>         int readBytes;
>         while ((readBytes = inputStream.read(bytes)) > 0) {
>             outputStream.write(bytes, 0, readBytes);
>         }
>
>         // Convert the contents of the output stream into a byte array
>         byte[] byteData = outputStream.toByteArray();
>
>         // Close the streams
>         inputStream.close();
>         outputStream.close();
>
>         return byteData;
>     }
>
> }
>
> On Nov 18, 11:11 pm, "Ikai L (Google)" <[email protected]> wrote:
>
> > What I mean is, is this code working on a different mail server?
>
> > On Wed, Nov 18, 2009 at 2:00 PM, mably <[email protected]> wrote:
> > > I'm just sending a simple mail from my Gmail account with an embedded
> > > gif image.
>
> > > I can perfectly read it from my mail servlet handler but when I try to
> > > relay it (cf. code from first message) I get this annoying "Converting
> > > attachment data failed" error which seems to be specific to GAE.
>
> > > Here is the mail sent data :
>
> > > MIME-Version: 1.0
> > > Sender: [email protected]
> > > Received: by 10.142.204.15 with HTTP; Wed, 18 Nov 2009 13:57:20 -0800
> > > (PST)
> > > Date: Wed, 18 Nov 2009 22:57:20 +0100
> > > Delivered-To: [email protected]
> > > X-Google-Sender-Auth: c9f34852bdb4f249
> > > Message-ID:
> > > <[email protected]>
> > > Subject: Test
> > > From: Francois MASUREL <[email protected]>
> > > To: contact-test <[email protected]>
> > > Content-Type: multipart/related; boundary=001636e90e61aa516e0478ac5398
>
> > > --001636e90e61aa516e0478ac5398
> > > Content-Type: multipart/alternative;
> > > boundary=001636e90e61aa516b0478ac5397
>
> > > --001636e90e61aa516b0478ac5397
> > > Content-Type: text/plain; charset=UTF-8
>
> > > [image:
> > > ?
>
> > > ui=2&view=att&th=125094c9bff3199b&attid=0.1&disp=attd&realattid=ii_125094c9bff3199b&zw]
>
> > > --001636e90e61aa516b0478ac5397
> > > Content-Type: text/html; charset=UTF-8
> > > Content-Transfer-Encoding: quoted-printable
>
> > > <img title=3D"?
> > > ui=3D2&amp;view=3Datt&amp;th=3D125094c9bff3199b&amp;attid=3D=
> > > 0.1&amp;disp=3Dattd&amp;realattid=3Dii_125094c9bff3199b&amp;zw"
> > > alt=3D"?ui=
>
> > > =3D2&amp;view=3Datt&amp;th=3D125094c9bff3199b&amp;attid=3D0.1&amp;disp=3Dat=
> > > td&amp;realattid=3Dii_125094c9bff3199b&amp;zw"
> > > src=3D"cid:ii_125094c9bff319=
> > > 9b"><br>
> > > <br>
>
> > > --001636e90e61aa516b0478ac5397--
> > > --001636e90e61aa516e0478ac5398
> > > Content-Type: image/gif; name="enveloppe.gif"
> > > Content-Transfer-Encoding: base64
> > > Content-ID: <ii_125094c9bff3199b>
> > > X-Attachment-Id: ii_125094c9bff3199b
>
> > > R0lGODlhEAAQAPeYAP39/tHR5MrK4fLy99PT6NfX6Nvb6/
> > > f3+ff3+uDg7sPD3fHx9ra206qqyrKy
> > > 0eLi8Onp8bCwz
> > > +jo8cvL4WVlm7y81cLC2fPz96ysyrCwzcXF3c7O487O4tDQ5Le30+fn8cvL4ufn
> > > 8PDw9/Ly+fDw9PLy+N7e66Skx8/
> > > P46mpymBglNLS5KKixoWFsYaGs56ewNXV5pqawKyszuTk7pyc
> > > wdra6Pr6/
> > > Ht7qnt7qXl5qry82LGx0MbG3pCQsrOz0qyszZubucjI3eLi7eDg6eDg7X5+rJSUu9zc
> > > 54uLtvz8/b+/2KenyPX1+K6uzpmZwOvr9a6uz8XF3Ovr9tLS5uPj8Hx8qvv7/
> > > ZiYwLm50NPT5tjY
> > > 6K+v0M7O5IGBqtzc68/
> > > P3mpqnoeHsLCwynJypNjY60ZGgJ2dw1hYjc7O4bi40nh4qWlpnNjY5fn5
> > > +5SUvcTE2oCAqbOz0Le31tzc7L292vj4+sPD2by81unp8s/P5s3N3fPz
> > > +VxckqOjyHZ2psLC23p6
> > > pt3d7d7e7PDw+L292JOTu/z8/Kury7Ozyra20ubm8MTE1/b2/Pn5/
> > > Hd3qJCQvOnp876+2tHR5tHR
> > > 4oaGrbW10pmZv/7+/v///
> > > wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>
> > > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>
> > > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>
> > > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>
> > > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>
> > > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAAJgALAAAAAAQABAA
>
> > > AAjlADEJHCiwzSQjamYQXIjAAo0fAq5gWChwgB03PiBdkhDkxgKCITywiLLn0qUkU2A4ESPQRKIm
> > > K5iYNIlHCREefg5gMjNBBICZAKx4SUGlQA4smOJw
> > > +BAAjaJLABh1aBCITJ8uNmrIuDRAS4Uldwyk
>
> > > OZQFhQIKXxCcEGLSkCBLOKowoKNDARJKmN5AMQmghIBIEfKAICTnURlMFwotuNQogYYHcwJsYDDm
> > > DCKBGXZcGiQpgIECf1zwAUJiIIQWI6RwSUAghooeQyi
> > > +cPCEwBYwcI5QFMimSCVHgPTsHlgnzJpF
> > > OncHBAA7
> > > --001636e90e61aa516e0478ac5398--
>
> > > On Nov 18, 10:34 pm, "Ikai L (Google)" <[email protected]> wrote:
> > > > François,
>
> > > > I'm not familiar with any standards with regard to inline images. Do you
> > > > have this working outside of App Engine? Do you have working code from
> > > that?
> > > > If there are discrepancies in our implementation of javax.mail.* and
> > > > standard implementations we should be aware.
>
> > > > On Mon, Nov 16, 2009 at 10:30 PM, mably <[email protected]> wrote:
> > > > > In fact standards attachments works.
>
> > > > > But it's not what I'm trying do do.
>
> > > > > I'm need to relay HTML messages with inline images and this is still
> > > > > not working.
>
> > > > > Is it a kind of limitation of GAE or is it supposed to work ?
>
> > > > > Thanx for your help.
>
> > > > > François
>
> > > > > On 16 nov, 23:09, mably <[email protected]> wrote:
> > > > > > Hi Ikai, thanx for you help.
>
> > > > > > I've copy pasted your code on my webapp (webwinewatch), I've no 
> > > > > > error
> > > > > > but the mail isn't correctly relayed, all attachements are removed.
>
> > > > > > I've just modified the sender, from and recipient lines :
>
> > > > > > message.setSender(new InternetAddress("<myaddress>@gmail.com",
> > > "Relay
> > > > > > account"));
> > > > > > message.setFrom(message.getSender());
> > > > > > message.setRecipient(Message.RecipientType.TO, message.getSender());
>
> > > > > > Do you have any clue ?
>
> > > > > > You can test it, sending an email to :
>
> ...
>
> read more »

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