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

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

Chilkat Lianja Extension Download Chilkat Lianja Extension

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loImap = createobject("CkImap")

// Connect using TLS.
loImap.Ssl = .T.
loImap.Port = 993
llSuccess = loImap.Connect("imap.example.com")
if (llSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Authenticate
llSuccess = loImap.Login("email_account_login","email_account_password")
if (llSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Select an IMAP mailbox
llSuccess = loImap.SelectMailbox("Inbox/postacert")
if (llSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Search for messages having "POSTA CERTIFICATA: Invio File" in the subject.
llFetchUids = .T.
loMessageSet = loImap.Search('SUBJECT "POSTA CERTIFICATA: Invio File"',llFetchUids)
if (loImap.LastMethodSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

if (loMessageSet.Count < 1) then
    ? "No messages found."
    release loMessageSet
    release loImap
    return
endif

// For our example, we'll process only the 1st email in the messageSet.
// Download the MIME source of the email into a StringBuilder object.
loEmail = loImap.FetchSingle(loMessageSet.GetId(0),loMessageSet.HasUids)
if (loImap.LastMethodSuccess = .F.) then
    ? loImap.LastErrorText
    release loMessageSet
    release loImap
    return
endif

release loMessageSet

// The email should contain an attached email.
// The Invoice XML is contained within the attached email.
loAttachedEmail = loEmail.GetAttachedMessage(0)
if (loEmail.LastMethodSuccess = .F.) then
    ? loEmail.LastErrorText
    release loEmail
    release loImap
    return
endif

release loEmail

// Get the MIME of the attached email..
loSbMime = createobject("CkStringBuilder")
llSuccess = loAttachedEmail.GetMimeSb(loSbMime)
release loAttachedEmail

// Load it into a Chilkat MIME object.
loMime = createobject("CkMime")
llSuccess = loMime.LoadMimeSb(loSbMime)

// Examine the structure of the MIME.
? loMime.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
loBdP7m = createobject("CkBinData")
// Get the 2nd sub-part, at index 1 because index 0 is the 1st sub-part.
loMimeP7m = loMime.GetPart(1)
if (loMime.LastMethodSuccess <> .T.) then
    ? "Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?"
    release loImap
    release loSbMime
    release loMime
    release loBdP7m
    return
endif

llSuccess = loMimeP7m.GetBodyBd(loBdP7m)
release loMimeP7m

// Verify the signature, which also extracts the content contained within the opaque signature.
loCrypt = createobject("CkCrypt2")
llSuccess = loCrypt.OpaqueVerifyBd(loBdP7m)
if (llSuccess = .F.) then
    ? loCrypt.LastErrorText
    release loImap
    release loSbMime
    release loMime
    release loBdP7m
    release loCrypt
    return
endif

// The bdP7m now contains the Invoice XML.
// Load it into an XML object.
loXml = createobject("CkXml")
llSuccess = loXml.LoadBd(loBdP7m,.T.)

? loXml.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

? "success."


release loImap
release loSbMime
release loMime
release loBdP7m
release loCrypt
release loXml