SendEmail_PDF.groovy

import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.Path;
import java.nio.file.Paths;

import com.atlassian.confluence.pages.PageManager
import com.atlassian.sal.api.component.ComponentLocator
import com.atlassian.mail.Email;
import com.atlassian.mail.server.SMTPMailServer;
import com.atlassian.confluence.mail.ConfluenceMailServerManager

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Multipart;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;

URL website =
 new URL("https://<confluence URL>/spaces/flyingpdf/pdfpageexport.action?pageId=<page ID number>");
 ReadableByteChannel rbc = Channels.newChannel(website.openStream());
 FileOutputStream fos = new FileOutputStream("export.pdf");
 fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);

 Path p1 = Paths.get("export.pdf");
 File attachment = p1.toFile();
 def confluenceMailServerManager = ComponentLocator.getComponent(ConfluenceMailServerManager)
 SMTPMailServer mailServer = confluenceMailServerManager.getDefaultSMTPMailServer();
 if (mailServer != null) {
 Email email = new Email("<e-mail address goes here>");
 email.setSubject("test");
 email.setBody("test");

 Multipart multipart = new MimeMultipart();
 //set attachment
 MimeBodyPart attachmentBodyPart = new MimeBodyPart();
 DataSource source = new FileDataSource(attachment);
 attachmentBodyPart.setDataHandler(new DataHandler(source));

 attachmentBodyPart.setFileName(attachment.getName());
 attachmentBodyPart.setContent("hello world", "text/plain;charset=utf-8");

 multipart.addBodyPart(attachmentBodyPart);

 email.setMultipart(multipart);

 mailServer.send(email);
 } else {
 throw new RuntimeException("no mail server!!!");
 }