CODEWITHSUNDEEP
javapdfamazon-s3email-attachmentsamazon-ses
balaaagi
balaaagi

Reputation: 512

Sending S3 Signed URL Pdf as email Attachment

Am trying to send S3 pdf documents as e-mail attachment. I use the signed URL of the document and build MimeBodyPart as below.

 Multipart multipart = new MimeMultipart();

 // have another MimeBodyPart for text/html content



BodyPart attachment = new MimeBodyPart();
attachment.setDataHandler(new DataHandler(new URLDataSource(attachmentUrl)));
attachment.setFileName(<filename>);
attachment.setDisposition(MimeBodyPart.ATTACHMENT);
attachment.setContent(<filename>,"application/pdf");
multipart.addBodyPart(attachment)

The problem am facing is the attachment is successfully attached but without any content. I meant it's always 1KB. And unable to open/view anything.

The above problem is faced for pdf files alone. But if I give some image URL and remove the setContent, setDisposition everything is working as expected.

Debugged some more looking at raw email could see the headers for the attachment are different.

When attached the image from this URL

Content-Type: image/png; name=googlelogo_color_272x92dp.png
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=googlelogo_color_272x92dp.png

But when I attach any PDf/S3 signed one via a URL I get as below

Content-Type: application/pdf; name=structures-and-c.pdf
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=structures-and-c.pdf

The exception when I get when I don't explicitly set the content type. The same is not being complained for an image.

javax.mail.internet.ParseException: In Content-Type string <pdf>, expected '/', got null

    at javax.mail.internet.ContentType.<init>(ContentType.java:80)
    at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1486)
    at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1148)
    at javax.mail.internet.MimeMultipart.updateHeaders(MimeMultipart.java:498)
    at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1509)
    at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2238)
    at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2198)
    at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1877)
    at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1854)

Upvotes: 1

Views: 1507

Answers (1)

balaaagi
balaaagi

Reputation: 512

If you are using S3 signed url for PDF using the above way no need to set the below.

attachment.setDisposition(MimeBodyPart.ATTACHMENT);
attachment.setContent(<filename>,"application/pdf");

Ensure when you are generating signed URL it sets the below properly

GetObjectRequest.builder()
                    .bucket(bucketName)
                    .key(objectName)
                    .responseContentDisposition("attachment;filename=" + objectName)
                    .responseContentEncoding("base64")
                    .responseContentType("application/pdf")

Upvotes: 1

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