add unpack script

bin/unpack.php

@@ -0,0 +1,36 @@
+#!/usr/bin/php
+<?php
+// unpacks the invoice and extracts some data
+//
+// Copyright (c) 2018, Paolo Greppi <[email protected]>
+// License: BSD 3-Clause
+
+require_once './vendor/autoload.php';
+
+if (count($argv) <= 1) {
+    echo "Usage: uppack.php file.xml\n";
+    exit(-1);
+}
+
+$filename = $argv[1];
+
+// defend against XML External Entity Injection
+libxml_disable_entity_loader(true);
+if (!file_exists($filename)) {
+    throw new \InvalidArgumentException('File not found');
+}
+$xml_string = file_get_contents($filename);
+$collapsed_xml_string = preg_replace("/\s+/", "", $xml_string);
+$collapsed_xml_string = $collapsed_xml_string ? $collapsed_xml_string : $xml_string;
+if (preg_match("/\<!DOCTYPE/i", $collapsed_xml_string)) {
+    throw new \InvalidArgumentException('Invalid XML: Detected use of illegal DOCTYPE');
+}
+
+libxml_use_internal_errors(true);
+$xml = simplexml_load_string($xml_string, 'SimpleXMLElement', LIBXML_NOWARNING);
+if ($xml === false) {
+    throw new \InvalidArgumentException("Cannot load XML\n");
+}
+
+echo $xml->FatturaElettronicaHeader->CedentePrestatore->DatiAnagrafici->IdFiscaleIVA->IdPaese . '-' . $xml->FatturaElettronicaHeader->CedentePrestatore->DatiAnagrafici->IdFiscaleIVA->IdCodice;
+var_dump($xml->FatturaElettronicaBody[0]->DatiGenerali->DatiGeneraliDocumento->Data);

www/Xml2Json.php

@@ -63,7 +63,7 @@ public function __construct(string $filename)
         libxml_use_internal_errors(true);
         $this->xml = simplexml_load_string($xml_string, 'SimpleXMLElement', LIBXML_NOWARNING);
         if ($this->xml === false) {
-            throw new \InvalidArgumentException("Cannot load xml file.\n");
+            throw new \InvalidArgumentException("Cannot load XML\n");
         }
         // convert back and forth to transform SimpleXMLElement Objects to associative arrays
         $json = json_encode($this->xml);