Java Requires Chilkat v11.0.0+

IMAP Read PEC Email of Aruba and Extract the Invoice XML Files

See more Email Object Examples

IMAP Read PEC Email of Aruba and Extract the Invoice XML Files. Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.Imap;
import com.chilkatsoft.chilkat2.MessageSet;
import com.chilkatsoft.chilkat2.Mime;
import com.chilkatsoft.chilkat2.StringBuilder;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Imap imap = new Imap();

        // Connect using TLS.
        imap.setSsl(true);
        imap.setPort(993);
        try {
            imap.connect("imap.example.com");

            // Authenticate
            imap.login("email_account_login", "email_account_password");

            // Select an IMAP mailbox
            imap.selectMailbox("Inbox/postacert");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Search for messages having "POSTA CERTIFICATA: Invio File" in the subject.
        boolean fetchUids = true;
        MessageSet messageSet = new MessageSet();
        try {
            imap.queryMbx("SUBJECT \"POSTA CERTIFICATA: Invio File\"", fetchUids, messageSet);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        if (messageSet.getCount() < 1) {
            System.out.println("No messages found.");
            return;
        }

        // For our example, we'll process only the 1st email in the messageSet.
        // Download the MIME source of the email into a StringBuilder object.
        Email email = new Email();
        try {
            imap.fetchEmail(false, messageSet.getId(0), messageSet.getHasUids(), email);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The email should contain an attached email.
        // The Invoice XML is contained within the attached email.
        Email attachedEmail = new Email();
        try {
            email.getAttachedEmail(0, attachedEmail);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the MIME of the attached email..
        StringBuilder sbMime = new StringBuilder();
        attachedEmail.getMimeSb(sbMime);

        // Load it into a Chilkat MIME object.
        Mime mime = new Mime();
        mime.loadMimeSb(sbMime);

        // Examine the structure of the MIME.
        System.out.println(mime.getStructure("text"));

        // The MIME has this structure:
        // multipart/mixed
        //     application/octet-stream
        //     application/octet-stream     <-- This is where the XML is contained.   It is within an opaque signature.
        //     text/plain

        // The 2nd application/octet-stream MIME header looks like this:

        // ------=_Part_329673_-1348225228.1579889273592
        // Content-Type: application/octet-stream; name="SM99999_99aaa.xml.p7m"
        // Content-Transfer-Encoding: base64
        // Content-Disposition: attachment; filename="SM99999_99aaa.xml.p7m"

        // Let's get the binary content of the .p7m
        BinData bdP7m = new BinData();
        // Get the 2nd sub-part, at index 1 because index 0 is the 1st sub-part.

        Mime mimeP7m = new Mime();
        try {
            mime.partAt(1, mimeP7m);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        if (!mime.getLastMethodSuccess()) {
            System.out.println("Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?");
            return;
        }

        mimeP7m.getBodyBd(bdP7m);

        // Verify the signature, which also extracts the content contained within the opaque signature.
        Crypt2 crypt = new Crypt2();
        try {
            crypt.opaqueVerifyBd(bdP7m);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The bdP7m now contains the Invoice XML.
        // Load it into an XML object.
        Xml xml = new Xml();
        xml.loadBd(bdP7m, true);

        System.out.println(xml.getXml());

        // We have XML such as the following:
        //
        // <?xml version="1.0" encoding="windows-1252"?>
        // <?xml-stylesheet type="text/xsl" href="fatturapa_v1.2.xsl"?>
        // <p:FatturaElettronica versione="FPR12" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
        //     xmlns:p="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2"
        //     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        //     <FatturaElettronicaHeader>
        //     ...
        //     </FatturaElettronicaHeader>
        //     <FatturaElettronicaBody>
        //     ...
        //     </FatturaElettronicaBody>
        // </p:FatturaElettronica>

        // Use this online tool to generate parsing code from sample XML:
        // Generate Parsing Code from XML

        System.out.println("success.");
    }
}