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(Tcl) 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 Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set imap [new_CkImap]

# Connect using TLS.
CkImap_put_Ssl $imap 1
CkImap_put_Port $imap 993
set success [CkImap_Connect $imap "imap.example.com"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Authenticate
set success [CkImap_Login $imap "email_account_login" "email_account_password"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Select an IMAP mailbox
set success [CkImap_SelectMailbox $imap "Inbox/postacert"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Search for messages having "POSTA CERTIFICATA: Invio File" in the subject.
set fetchUids 1
# messageSet is a CkMessageSet
set messageSet [CkImap_Search $imap "SUBJECT \"POSTA CERTIFICATA: Invio File\"" $fetchUids]
if {[CkImap_get_LastMethodSuccess $imap] == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

if {[CkMessageSet_get_Count $messageSet] < 1} then {
    puts "No messages found."
    delete_CkMessageSet $messageSet

    delete_CkImap $imap
    exit
}

# 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 is a CkEmail
set email [CkImap_FetchSingle $imap [CkMessageSet_GetId $messageSet 0] [CkMessageSet_get_HasUids $messageSet]]
if {[CkImap_get_LastMethodSuccess $imap] == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkMessageSet $messageSet

    delete_CkImap $imap
    exit
}

delete_CkMessageSet $messageSet

# The email should contain an attached email.
# The Invoice XML is contained within the attached email.
# attachedEmail is a CkEmail
set attachedEmail [CkEmail_GetAttachedMessage $email 0]
if {[CkEmail_get_LastMethodSuccess $email] == 0} then {
    puts [CkEmail_lastErrorText $email]
    delete_CkEmail $email

    delete_CkImap $imap
    exit
}

delete_CkEmail $email

# Get the MIME of the attached email..
set sbMime [new_CkStringBuilder]

set success [CkEmail_GetMimeSb $attachedEmail $sbMime]
delete_CkEmail $attachedEmail

# Load it into a Chilkat MIME object.
set mime [new_CkMime]

set success [CkMime_LoadMimeSb $mime $sbMime]

# Examine the structure of the MIME.
puts [CkMime_getStructure $mime 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
set bdP7m [new_CkBinData]

# Get the 2nd sub-part, at index 1 because index 0 is the 1st sub-part.
# mimeP7m is a CkMime
set mimeP7m [CkMime_GetPart $mime 1]
if {[CkMime_get_LastMethodSuccess $mime] != 1} then {
    puts "Failed to get 2nd sub-part. Perhaps the MIME does not have a 2nd sub-part?"
    delete_CkImap $imap
    delete_CkStringBuilder $sbMime
    delete_CkMime $mime
    delete_CkBinData $bdP7m
    exit
}

set success [CkMime_GetBodyBd $mimeP7m $bdP7m]
delete_CkMime $mimeP7m

# Verify the signature, which also extracts the content contained within the opaque signature.
set crypt [new_CkCrypt2]

set success [CkCrypt2_OpaqueVerifyBd $crypt $bdP7m]
if {$success == 0} then {
    puts [CkCrypt2_lastErrorText $crypt]
    delete_CkImap $imap
    delete_CkStringBuilder $sbMime
    delete_CkMime $mime
    delete_CkBinData $bdP7m
    delete_CkCrypt2 $crypt
    exit
}

# The bdP7m now contains the Invoice XML.
# Load it into an XML object.
set xml [new_CkXml]

set success [CkXml_LoadBd $xml $bdP7m 1]

puts [CkXml_getXml $xml]

# 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

puts "success."

delete_CkImap $imap
delete_CkStringBuilder $sbMime
delete_CkMime $mime
delete_CkBinData $bdP7m
delete_CkCrypt2 $crypt
delete_CkXml $xml

 

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