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Lianja

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

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

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llSuccess = .F.

// 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 = createobject("CkMessageSet")
llSuccess = loImap.QueryMbx('SUBJECT "POSTA CERTIFICATA: Invio File"',llFetchUids,loMessageSet)
if (llSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    release loMessageSet
    return
endif

if (loMessageSet.Count < 1) then
    ? "No messages found."
    release loImap
    release loMessageSet
    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 = createobject("CkEmail")
llSuccess = loImap.FetchEmail(.F.,loMessageSet.GetId(0),loMessageSet.HasUids,loEmail)
if (llSuccess = .F.) then
    ? loImap.LastErrorText
    release loImap
    release loMessageSet
    release loEmail
    return
endif

// The email should contain an attached email.
// The Invoice XML is contained within the attached email.
loAttachedEmail = createobject("CkEmail")
llSuccess = loEmail.GetAttachedEmail(0,loAttachedEmail)
if (llSuccess = .F.) then
    ? loEmail.LastErrorText
    release loImap
    release loMessageSet
    release loEmail
    release loAttachedEmail
    return
endif

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

// 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 = createobject("CkMime")
llSuccess = loMime.PartAt(1,loMimeP7m)
if (llSuccess = .F.) then
    ? loMime.LastErrorText
    release loImap
    release loMessageSet
    release loEmail
    release loAttachedEmail
    release loSbMime
    release loMime
    release loBdP7m
    release loMimeP7m
    return
endif

if (loMime.LastMethodSuccess <> .T.) then
    ? "Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?"
    release loImap
    release loMessageSet
    release loEmail
    release loAttachedEmail
    release loSbMime
    release loMime
    release loBdP7m
    release loMimeP7m
    return
endif

llSuccess = loMimeP7m.GetBodyBd(loBdP7m)

// 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 loMessageSet
    release loEmail
    release loAttachedEmail
    release loSbMime
    release loMime
    release loBdP7m
    release loMimeP7m
    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 loMessageSet
release loEmail
release loAttachedEmail
release loSbMime
release loMime
release loBdP7m
release loMimeP7m
release loCrypt
release loXml