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

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

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
integer li_Success
oleobject loo_Imap
integer li_FetchUids
oleobject loo_MessageSet
oleobject loo_Email
oleobject loo_AttachedEmail
oleobject loo_SbMime
oleobject loo_Mime
oleobject loo_BdP7m
oleobject loo_MimeP7m
oleobject loo_Crypt
oleobject loo_Xml

li_Success = 0

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

loo_Imap = create oleobject
li_rc = loo_Imap.ConnectToNewObject("Chilkat.Imap")
if li_rc < 0 then
    destroy loo_Imap
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Connect using TLS.
loo_Imap.Ssl = 1
loo_Imap.Port = 993
li_Success = loo_Imap.Connect("imap.example.com")
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

// Authenticate
li_Success = loo_Imap.Login("email_account_login","email_account_password")
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

// Select an IMAP mailbox
li_Success = loo_Imap.SelectMailbox("Inbox/postacert")
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

// Search for messages having "POSTA CERTIFICATA: Invio File" in the subject.
li_FetchUids = 1
loo_MessageSet = create oleobject
li_rc = loo_MessageSet.ConnectToNewObject("Chilkat.MessageSet")

li_Success = loo_Imap.QueryMbx("SUBJECT ~"POSTA CERTIFICATA: Invio File~"",li_FetchUids,loo_MessageSet)
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    destroy loo_MessageSet
    return
end if

if loo_MessageSet.Count < 1 then
    Write-Debug "No messages found."
    destroy loo_Imap
    destroy loo_MessageSet
    return
end if

// For our example, we'll process only the 1st email in the messageSet.
// Download the MIME source of the email into a StringBuilder object.
loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")

li_Success = loo_Imap.FetchEmail(0,loo_MessageSet.GetId(0),loo_MessageSet.HasUids,loo_Email)
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    destroy loo_MessageSet
    destroy loo_Email
    return
end if

// The email should contain an attached email.
// The Invoice XML is contained within the attached email.
loo_AttachedEmail = create oleobject
li_rc = loo_AttachedEmail.ConnectToNewObject("Chilkat.Email")

li_Success = loo_Email.GetAttachedEmail(0,loo_AttachedEmail)
if li_Success = 0 then
    Write-Debug loo_Email.LastErrorText
    destroy loo_Imap
    destroy loo_MessageSet
    destroy loo_Email
    destroy loo_AttachedEmail
    return
end if

// Get the MIME of the attached email..
loo_SbMime = create oleobject
li_rc = loo_SbMime.ConnectToNewObject("Chilkat.StringBuilder")

li_Success = loo_AttachedEmail.GetMimeSb(loo_SbMime)

// Load it into a Chilkat MIME object.
loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat.Mime")

li_Success = loo_Mime.LoadMimeSb(loo_SbMime)

// Examine the structure of the MIME.
Write-Debug loo_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
loo_BdP7m = create oleobject
li_rc = loo_BdP7m.ConnectToNewObject("Chilkat.BinData")

// Get the 2nd sub-part, at index 1 because index 0 is the 1st sub-part.

loo_MimeP7m = create oleobject
li_rc = loo_MimeP7m.ConnectToNewObject("Chilkat.Mime")

li_Success = loo_Mime.PartAt(1,loo_MimeP7m)
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Imap
    destroy loo_MessageSet
    destroy loo_Email
    destroy loo_AttachedEmail
    destroy loo_SbMime
    destroy loo_Mime
    destroy loo_BdP7m
    destroy loo_MimeP7m
    return
end if

if loo_Mime.LastMethodSuccess <> 1 then
    Write-Debug "Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?"
    destroy loo_Imap
    destroy loo_MessageSet
    destroy loo_Email
    destroy loo_AttachedEmail
    destroy loo_SbMime
    destroy loo_Mime
    destroy loo_BdP7m
    destroy loo_MimeP7m
    return
end if

li_Success = loo_MimeP7m.GetBodyBd(loo_BdP7m)

// Verify the signature, which also extracts the content contained within the opaque signature.
loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")

li_Success = loo_Crypt.OpaqueVerifyBd(loo_BdP7m)
if li_Success = 0 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Imap
    destroy loo_MessageSet
    destroy loo_Email
    destroy loo_AttachedEmail
    destroy loo_SbMime
    destroy loo_Mime
    destroy loo_BdP7m
    destroy loo_MimeP7m
    destroy loo_Crypt
    return
end if

// The bdP7m now contains the Invoice XML.
// Load it into an XML object.
loo_Xml = create oleobject
li_rc = loo_Xml.ConnectToNewObject("Chilkat.Xml")

li_Success = loo_Xml.LoadBd(loo_BdP7m,1)

Write-Debug loo_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

Write-Debug "success."


destroy loo_Imap
destroy loo_MessageSet
destroy loo_Email
destroy loo_AttachedEmail
destroy loo_SbMime
destroy loo_Mime
destroy loo_BdP7m
destroy loo_MimeP7m
destroy loo_Crypt
destroy loo_Xml