Ruby

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. Ruby

require 'chilkat'

success = false

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

imap = Chilkat::CkImap.new()

# Connect using TLS.
imap.put_Ssl(true)
imap.put_Port(993)
success = imap.Connect("imap.example.com")
if (success == false)
    print imap.lastErrorText() + "\n";
    exit
end

# Authenticate
success = imap.Login("email_account_login","email_account_password")
if (success == false)
    print imap.lastErrorText() + "\n";
    exit
end

# Select an IMAP mailbox
success = imap.SelectMailbox("Inbox/postacert")
if (success == false)
    print imap.lastErrorText() + "\n";
    exit
end

# Search for messages having "POSTA CERTIFICATA: Invio File" in the subject.
fetchUids = true
messageSet = Chilkat::CkMessageSet.new()
success = imap.QueryMbx("SUBJECT \"POSTA CERTIFICATA: Invio File\"",fetchUids,messageSet)
if (success == false)
    print imap.lastErrorText() + "\n";
    exit
end

if (messageSet.get_Count() < 1)
    print "No messages found." + "\n";
    exit
end

# 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 = Chilkat::CkEmail.new()
success = imap.FetchEmail(false,messageSet.GetId(0),messageSet.get_HasUids(),email)
if (success == false)
    print imap.lastErrorText() + "\n";
    exit
end

# The email should contain an attached email.
# The Invoice XML is contained within the attached email.
attachedEmail = Chilkat::CkEmail.new()
success = email.GetAttachedEmail(0,attachedEmail)
if (success == false)
    print email.lastErrorText() + "\n";
    exit
end

# Get the MIME of the attached email..
sbMime = Chilkat::CkStringBuilder.new()
success = attachedEmail.GetMimeSb(sbMime)

# Load it into a Chilkat MIME object.
mime = Chilkat::CkMime.new()
success = mime.LoadMimeSb(sbMime)

# Examine the structure of the MIME.
print mime.getStructure("text") + "\n";

# 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
bdP7m = Chilkat::CkBinData.new()
# Get the 2nd sub-part, at index 1 because index 0 is the 1st sub-part.

mimeP7m = Chilkat::CkMime.new()
success = mime.PartAt(1,mimeP7m)
if (success == false)
    print mime.lastErrorText() + "\n";
    exit
end

if (mime.get_LastMethodSuccess() != true)
    print "Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?" + "\n";
    exit
end

success = mimeP7m.GetBodyBd(bdP7m)

# Verify the signature, which also extracts the content contained within the opaque signature.
crypt = Chilkat::CkCrypt2.new()
success = crypt.OpaqueVerifyBd(bdP7m)
if (success == false)
    print crypt.lastErrorText() + "\n";
    exit
end

# The bdP7m now contains the Invoice XML.
# Load it into an XML object.
xml = Chilkat::CkXml.new()
success = xml.LoadBd(bdP7m,true)

print xml.getXml() + "\n";

# 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

print "success." + "\n";