Examples with VeraPDFException org.verapdf.core.VeraPDFException used on opensource projects

Example 1 with VeraPDFException

use of org.verapdf.core.VeraPDFException in project mustangproject by ZUGFeRD.

the class PDFValidator method validate.

@Override
public void validate() throws IrrecoverableValidationError {
    zfXML = null;
    final File file = new File(pdfFilename);
    // file existence must have been checked before
    final BigFileSearcher searcher = new BigFileSearcher();
    final byte[] pdfSignature = { '%', 'P', 'D', 'F' };
    if (searcher.indexOf(file, pdfSignature) != 0) {
        context.addResultItem(new ValidationResultItem(ESeverity.fatal, "Not a PDF file " + pdfFilename).setSection(20).setPart(EPart.pdf));
    }
    final long startPDFTime = Calendar.getInstance().getTimeInMillis();
    // Step 1 Validate PDF
    VeraGreenfieldFoundryProvider.initialise();
    // Default validator config
    final ValidatorConfig validatorConfig = ValidatorFactory.defaultConfig();
    // Default features config
    final FeatureExtractorConfig featureConfig = FeatureFactory.defaultConfig();
    // Default plugins config
    final PluginsCollectionConfig pluginsConfig = PluginsCollectionConfig.defaultConfig();
    // Default fixer config
    final MetadataFixerConfig fixerConfig = FixerFactory.defaultConfig();
    // Tasks configuring
    final EnumSet tasks = EnumSet.noneOf(TaskType.class);
    tasks.add(TaskType.VALIDATE);
    // tasks.add(TaskType.EXTRACT_FEATURES);
    // tasks.add(TaskType.FIX_METADATA);
    // Creating processor config
    final ProcessorConfig processorConfig = ProcessorFactory.fromValues(validatorConfig, featureConfig, pluginsConfig, fixerConfig, tasks);
    // Creating processor and output stream.
    final ByteArrayOutputStream reportStream = new ByteArrayOutputStream();
    try (BatchProcessor processor = ProcessorFactory.fileBatchProcessor(processorConfig)) {
        // Generating list of files for processing
        final List<File> files = new ArrayList<>();
        files.add(new File(pdfFilename));
        // starting the processor
        processor.process(files, ProcessorFactory.getHandler(FormatOption.MRR, true, reportStream, 100, processorConfig.getValidatorConfig().isRecordPasses()));
        pdfReport = reportStream.toString("utf-8").replaceAll("<\\?xml version=\"1\\.0\" encoding=\"utf-8\"\\?>", "");
    } catch (final VeraPDFException e) {
        final ValidationResultItem vri = new ValidationResultItem(ESeverity.exception, e.getMessage()).setSection(6).setPart(EPart.pdf);
        final StringWriter sw = new StringWriter();
        final PrintWriter pw = new PrintWriter(sw);
        e.printStackTrace(pw);
        vri.setStacktrace(sw.toString());
        context.addResultItem(vri);
    } catch (final IOException excep) {
        context.addResultItem(new ValidationResultItem(ESeverity.exception, excep.getMessage()).setSection(7).setPart(EPart.pdf).setStacktrace(excep.getStackTrace().toString()));
    }
    // step 2 validate XMP
    final ZUGFeRDImporter zi = new ZUGFeRDImporter(pdfFilename);
    final String xmp = zi.getXMP();
    final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    final Document docXMP;
    if (xmp.length() == 0) {
        context.addResultItem(new ValidationResultItem(ESeverity.error, "Invalid XMP Metadata not found").setSection(17).setPart(EPart.pdf));
    }
    /*
		 * checking for sth like <zf:ConformanceLevel>EXTENDED</zf:ConformanceLevel>
		 * <zf:DocumentType>INVOICE</zf:DocumentType>
		 * <zf:DocumentFileName>ZUGFeRD-invoice.xml</zf:DocumentFileName>
		 * <zf:Version>1.0</zf:Version>
		 */
    try {
        final DocumentBuilder builder = factory.newDocumentBuilder();
        final InputSource is = new InputSource(new StringReader(xmp));
        docXMP = builder.parse(is);
        final XPathFactory xpathFactory = XPathFactory.newInstance();
        // Create XPath object XPath xpath = xpathFactory.newXPath(); XPathExpression
        final XPath xpath = xpathFactory.newXPath();
        // xpath.compile("//*[local-name()=\"GuidelineSpecifiedDocumentContextParameter\"]/[local-name()=\"ID\"]");
        // evaluate expression result on XML document ndList = (NodeList)
        // get the first element
        XPathExpression xpr = xpath.compile("//*[local-name()=\"ConformanceLevel\"]|//*[local-name()=\"Description\"]/@ConformanceLevel");
        NodeList nodes = (NodeList) xpr.evaluate(docXMP, XPathConstants.NODESET);
        if (nodes.getLength() == 0) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: ConformanceLevel not found").setSection(11).setPart(EPart.pdf));
        }
        boolean conformanceLevelValid = false;
        for (int i = 0; i < nodes.getLength(); i++) {
            final String[] valueArray = { "BASIC WL", "BASIC", "MINIMUM", "EN 16931", "COMFORT", "CIUS", "EXTENDED", "XRECHNUNG" };
            if (stringArrayContains(valueArray, nodes.item(i).getTextContent())) {
                conformanceLevelValid = true;
            }
        }
        if (!conformanceLevelValid) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: ConformanceLevel contains invalid value").setSection(12).setPart(EPart.pdf));
        }
        xpr = xpath.compile("//*[local-name()=\"DocumentType\"]|//*[local-name()=\"Description\"]/@DocumentType");
        nodes = (NodeList) xpr.evaluate(docXMP, XPathConstants.NODESET);
        if (nodes.getLength() == 0) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: DocumentType not found").setSection(13).setPart(EPart.pdf));
        }
        boolean documentTypeValid = false;
        for (int i = 0; i < nodes.getLength(); i++) {
            if (nodes.item(i).getTextContent().equals("INVOICE") || nodes.item(i).getTextContent().equals("ORDER") || nodes.item(i).getTextContent().equals("ORDER_RESPONSE") || nodes.item(i).getTextContent().equals("ORDER_CHANGE")) {
                documentTypeValid = true;
            }
        }
        if (!documentTypeValid) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: DocumentType invalid").setSection(14).setPart(EPart.pdf));
        }
        xpr = xpath.compile("//*[local-name()=\"DocumentFileName\"]|//*[local-name()=\"Description\"]/@DocumentFileName");
        nodes = (NodeList) xpr.evaluate(docXMP, XPathConstants.NODESET);
        if (nodes.getLength() == 0) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: DocumentFileName not found").setSection(21).setPart(EPart.pdf));
        }
        boolean documentFilenameValid = false;
        for (int i = 0; i < nodes.getLength(); i++) {
            final String[] valueArray = { "factur-x.xml", "ZUGFeRD-invoice.xml", "zugferd-invoice.xml", "xrechnung.xml", "order-x.xml" };
            if (stringArrayContains(valueArray, nodes.item(i).getTextContent())) {
                documentFilenameValid = true;
            }
        // e.g. ZUGFeRD-invoice.xml
        }
        if (!documentFilenameValid) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: DocumentFileName contains invalid value").setSection(19).setPart(EPart.pdf));
        }
        xpr = xpath.compile("//*[local-name()=\"Version\"]|//*[local-name()=\"Description\"]/@Version");
        nodes = (NodeList) xpr.evaluate(docXMP, XPathConstants.NODESET);
        // print the text content of each child
        if (nodes.getLength() == 0) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: Version not found").setSection(15).setPart(EPart.pdf));
        }
        boolean versionValid = false;
        for (int i = 0; i < nodes.getLength(); i++) {
            // 1.2, 2.0 and 2.1 are for xrechnung 1.2, 2p0 can be ZF 2.0, 2.1, 2.1.1
            final String[] valueArray = { "1.0", "2p0", "1.2", "2.0", "2.1" };
            if (stringArrayContains(valueArray, nodes.item(i).getTextContent())) {
                versionValid = true;
            }
        // e.g. 1.0
        }
        if (!versionValid) {
            context.addResultItem(new ValidationResultItem(ESeverity.error, "XMP Metadata: Version contains invalid value").setSection(16).setPart(EPart.pdf));
        }
    } catch (final SAXException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (final IOException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (final ParserConfigurationException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (final XPathExpressionException e) {
        LOGGER.error(e.getMessage(), e);
    }
    zfXML = zi.getUTF8();
    // step 3 find signatures
    try {
        final byte[] symtraxSignature = "Symtrax".getBytes("UTF-8");
        final byte[] mustangSignature = "via mustangproject".getBytes("UTF-8");
        final byte[] facturxpythonSignature = "by Alexis de Lattre".getBytes("UTF-8");
        final byte[] intarsysSignature = "intarsys ".getBytes("UTF-8");
        final byte[] konikSignature = "Konik".getBytes("UTF-8");
        final byte[] pdfMachineSignature = "pdfMachine from Broadgun Software".getBytes("UTF-8");
        final byte[] ghostscriptSignature = "%%Invocation:".getBytes("UTF-8");
        if (searcher.indexOf(file, symtraxSignature) != -1) {
            Signature = "Symtrax";
        } else if (searcher.indexOf(file, mustangSignature) != -1) {
            Signature = "Mustang";
        } else if (searcher.indexOf(file, facturxpythonSignature) != -1) {
            Signature = "Factur/X Python";
        } else if (searcher.indexOf(file, intarsysSignature) != -1) {
            Signature = "Intarsys";
        } else if (searcher.indexOf(file, konikSignature) != -1) {
            Signature = "Konik";
        } else if (searcher.indexOf(file, pdfMachineSignature) != -1) {
            Signature = "pdfMachine";
        } else if (searcher.indexOf(file, ghostscriptSignature) != -1) {
            Signature = "Ghostscript";
        }
        context.setSignature(Signature);
    } catch (final UnsupportedEncodingException e) {
        LOGGER.error(e.getMessage(), e);
    }
    // step 4:validate additional data
    final HashMap<String, byte[]> additionalData = zi.getAdditionalData();
    for (final String filename : additionalData.keySet()) {
        // validating xml in byte[]	additionalData.get(filename)
        LOGGER.info("validating additionalData " + filename);
        validateSchema(additionalData.get(filename), "ad/basic/additional_data_base_schema.xsd", 2, EPart.pdf);
    }
    // end
    final long endTime = Calendar.getInstance().getTimeInMillis();
    if (!pdfReport.contains("validationReports compliant=\"1\"")) {
        context.setInvalid();
    }
    if (!pdfReport.contains("PDF/A-3")) {
        context.addResultItem(new ValidationResultItem(ESeverity.error, "Not a PDF/A-3").setSection(23).setPart(EPart.pdf));
    }
    context.addCustomXML(pdfReport + "<info><signature>" + ((context.getSignature() != null) ? context.getSignature() : "unknown") + "</signature><duration unit=\"ms\">" + (endTime - startPDFTime) + "</duration></info>");
}