I am currently using the Apache FOP library to generate PDF's. I want these PDF's protected from copy-pasting, so people would have to use actual OCR libraries (or manual typing) to get the information on the PDF.
FOP apparently offers some security, which then is added as meta-data on the PDF, to protect from things like printing or copying, but this doesn't seem to work properly (can't disable the copy-pasting when printing is enabled, etc).
A possibility which seemed straight forward to me is basically somehow transforming all the text on the PDF's to images, but I can't find any information on the matter.
Obviously I don't care if the PDF is searchable or not. I just want to prevent people from copy-pasting while they should still be able to print it.
My current FOP code:
private static FopFactory fopFactory;
private static FopFactory initializeFactory() throws IOException,
SAXException {
if (fopFactory == null) {
File f = new File(SettingUtil.getSetting(LetterGeneratorSettings.FOP_CONFIG_LOCATION));
fopFactory = FopFactory.newInstance(f);
}
return fopFactory;
}
public static File generatePDFFromXML(File fopTemplate, File xmlSource,
File resultFileLocation) throws IOException {
try {
initializeFactory();
URL url = fopTemplate.toURI().toURL();
// creation of transform source
StreamSource transformSource = new StreamSource(url.openStream());
// create an instance of fop factory
// a user agent is needed for transformation
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
foUserAgent.getRendererOptions().put("encryption-params",
getEncryptionParams());
// to store output
ByteArrayOutputStream pdfoutStream = new ByteArrayOutputStream();
StreamSource source = new StreamSource(new ByteArrayInputStream(IOUtils.toByteArray(new FileInputStream(xmlSource))));
Transformer xslfoTransformer;
try {
TransformerFactory transfact = TransformerFactory.newInstance();
xslfoTransformer = transfact.newTransformer(transformSource);
// Construct fop with desired output format
Fop fop;
try {
fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, pdfoutStream);
// Resulting SAX events (the generated FO)
// must be piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
try {
// everything will happen here..
xslfoTransformer.transform(source, res);
// if you want to save PDF file use the following code
OutputStream out = new java.io.FileOutputStream(resultFileLocation);
out = new java.io.BufferedOutputStream(out);
FileOutputStream str = new FileOutputStream(resultFileLocation);
str.write(pdfoutStream.toByteArray());
str.close();
out.close();
} catch (TransformerException e) {
e.printStackTrace();
}
} catch (FOPException e) {
e.printStackTrace();
}
} catch (TransformerConfigurationException e) {
e.printStackTrace();
} catch (TransformerFactoryConfigurationError e) {
e.printStackTrace();
}
return resultFileLocation;
} catch (Exception ex) {
throw new IOException(ex);
}
}
private static PDFEncryptionParams getEncryptionParams() {
return new PDFEncryptionParams(null,
SettingUtil.getSetting(LetterGeneratorSettings.PDF_PASSWORD),
true, false, false, false, false);
}
The following is the contents of my fopconfig.xml
<fop version="1.0">
<!-- Strict user configuration -->
<strict-configuration>false</strict-configuration>
<!-- Strict FO validation -->
<strict-validation>false</strict-validation>
<!-- Base URL for resolving relative URLs -->
<base>./</base>
<!-- Font Base URL for resolving relative font URLs -->
<font-base>./</font-base>
<!-- Source resolution in dpi (dots/pixels per inch) for determining the size of pixels in SVG and bitmap images, default: 72dpi -->
<source-resolution>72</source-resolution>
<!-- Target resolution in dpi (dots/pixels per inch) for specifying the target resolution for generated bitmaps, default: 72dpi -->
<target-resolution>72</target-resolution>
<!-- default page-height and page-width, in case
value is specified as auto -->
<default-page-settings height="11in" width="8.26in"/>
<!-- etc. etc..... -->
</fop>
I am not sure how it works with Apache FOP but it is quite easy with iText lib.
Here a tutorial i wrote a while back ago about this http://tutors4all.net/index.php/2015/05/06/encrypt-pdf-file/
Related
I have to display some reports with Dynamic Reports. I use NetBeans and Tomcat 7. Eventually, all must be uploaded to cloud OpenShift. I used DynamicReports to create simple report (code snippet):
Connection conn=null;
try {
Class.forName(DBConnStrings.driver);
conn = DriverManager.getConnection(DBConnStrings.url + DBConnStrings.dbName+DBConnStrings.sslState, DBConnStrings.userName, DBConnStrings.password);
} catch (Exception e) {
e.printStackTrace();
}
JasperReportBuilder report = DynamicReports.report();
report
.columns(
Columns.column("Tank Id", "id", DataTypes.integerType()),
Columns.column("Tank Name", "name", DataTypes.stringType()),
Columns.column("Label", "label", DataTypes.stringType()),
Columns.column("Description", "descrshort", DataTypes.stringType()));
report.setDataSource("SELECT id, name, label, descrshort FROM "+ DBConnStrings.dbName +".tbltankslist", conn);
try {
//show the report
//report.show();
//export the report to a pdf file
report.toPdf(new FileOutputStream("c:/report.pdf"));
} catch (DRException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
This code located in a Servlet. It works. I get JasperViewer at first and a report.pdf on my HDD. But I don't want it. First I do not want to see JasperViewer, second I do not want to download file to client HDD. How to display report inside web-browser only?
Here is the question Jasper Reports. It is about jasper reports + iReport and I have no idea how to use that information for DynamicReports - at first, second there is also "download pdf to client drive" approach, but I need to show it inside the browser.
use the following code in your file which redirect towards jasper invocation page, so that your jasperPDF should open in new tab instead of downloading.
JasperInvocation.jsp => file in which you invoke jasperReport
<form method="POST" action="JasperInvocation.jsp" target="_blank">
Please find following code , I have implemented in Dynamic report(Jasper Api) , Its working for me :-
#RequestMapping(value="/pdfDownload", method = RequestMethod.GET)
public void getPdfDownload(HttpServletResponse response) {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
report().columns().setDataSource().show()
.toPdf(buffer);
byte[] bytes = buffer.toByteArray();
InputStream inputStream = new ByteArrayInputStream (bytes);
IOUtils.copy(inputStream, response.getOutputStream());
response.setHeader("Content-Disposition", "attachment; filename=Accepted1.pdf");
response.flushBuffer();
}
I'm using GeoTools 12.2 for developing java class library project.
Firstly, I'm working on GeoTools WMS module with this guide.
The point that I was failed is doing get map request so that I could get capabilities document and layers etc.
My wms url http://sampleserver1.arcgisonline.com/ArcGIS/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/WMSServer
It contains 3 layers (States,Rivers,Cities)
I'm using structure to get map operation like below.
GetMapRequest getMapRequest = wms.createGetMapRequest();//wms is my WebMapServer object
getMapRequest.addLayer(tempLayer);//tempLayer contains states layer
GetMapResponse response = (GetMapResponse) wms.issueRequest(getMapRequest);
BufferedImage image = ImageIO.read(response.getInputStream());
I also tried other methods in guide to do GetMapRequest but I can't succeed, always getting NullPointerException to BufferedImage object.
What is your suggestions? Thanks in advance.
You need to set some more parameters for your request, the WMS getMapResponse doesn't provide any defaults for several of them (as they are unique to your request/map). So you need at least the following:
private BufferedImage getLayer(Layer l) {
GetMapRequest getMapRequest = wms.createGetMapRequest();
getMapRequest.addLayer(l);
getMapRequest.setBBox(l.getEnvelope(DefaultGeographicCRS.WGS84));
getMapRequest.setDimensions(200, 400);
getMapRequest.setFormat("image/png");
getMapRequest.setSRS("CRS:84");
System.out.println(getMapRequest.getFinalURL());
try {
GetMapResponse response = wms.issueRequest(getMapRequest);
BufferedImage image = ImageIO.read(response.getInputStream());
return image;
} catch (ServiceException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
In general to avoid getting an empty image you can do some error checking on the response:
if (response.getContentType().equalsIgnoreCase("image/png")) {
BufferedImage image = ImageIO.read(response.getInputStream());
return image;
} else {
StringWriter writer = new StringWriter();
IOUtils.copy(response.getInputStream(), writer);
String error = writer.toString();
System.out.println(error);
return null;
}
which will give you an XML encoded error to tell you what went wrong:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<ServiceExceptionReport version="1.3.0"
xmlns="http://www.opengis.net/ogc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/ogc http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd">
<ServiceException code="InvalidFormat">
Parameter 'bbox' can not be empty.
</ServiceException>
</ServiceExceptionReport>
I built an image form PDF doc inside a JSF backing bean, i need to show image inside JSF page. I found that primefaces has a component named , I defined a variable:
private StreamedContent pdfImage;
according to this example http://www.primefaces.org/showcase/ui/dynamicImage.jsf. In my code
i built pdf using some data and apache PDFBox and save document into:
private byte[] bytesPdf;
My jsf line is
<p:graphicImage value="#{myBean.pdfImage}" rendered="#{myBean.showImage}"/>
After that i call following method that tranform first PDF document page to PNG i get:
public void buildPDFImage() throws IOException{
ByteArrayOutputStream os = new ByteArrayOutputStream();
//Build bufferedImage from pdf bytearray
InputStream input = new ByteArrayInputStream(bytesPdf);
PDDocument archivo=new PDDocument();
archivo=PDDocument.load(input);
PDPage firstPage = (PDPage) archivo.getDocumentCatalog().getAllPages().get(0);
BufferedImage bufferedImage = firstPage.convertToImage();
//File exit=new File("d:/exit.png"); if i do something like this and pass file as param to iowrite image is generated on file system
try {
ImageIO.write(bufferedImage, "png", os);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
pdfImage = new DefaultStreamedContent(new ByteArrayInputStream(os.toByteArray()), "image/png");
}
When i run my app after generate pdf image i get this trace
GRAVE: Error Rendering View[/pages/apphuella.xhtml]
java.lang.IllegalStateException: PWC3999: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2880)
at org.apache.catalina.connector.Request.getSession(Request.java:2577)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:920)
at com.sun.faces.context.SessionMap.getSession(SessionMap.java:235)
at com.sun.faces.context.SessionMap.put(SessionMap.java:126)
at com.sun.faces.context.SessionMap.put(SessionMap.java:61)
at org.primefaces.component.graphicimage.GraphicImageRenderer.getImageSrc(GraphicImageRenderer.java:105)
at org.primefaces.component.graphicimage.GraphicImageRenderer.encodeEnd(GraphicImageRenderer.java:45)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1763)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1759)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1759)
at
I would know if i´m using correctly if don´t how could i use it to show generated png(and other images)?, also if there´s other option to show runtime generated images on JSF pages.
Thanks in advance
At first, you need to keep the file a temporary directory. After that you should render the file again.
Try as below
Backing Bean
private String filePath;
public String filePath() {
return filePath;
}
private String getSystemPath() {
Object context = getFacesContext().getExternalContext().getContext();
String systemPath = ((ServletContext)context).getRealPath("/");
return systemPath;
}
public void buildPDFImage() throws IOException {
// create any kind of file types.
byte[] cotent = --> take byte array content of your files.
Stirng fileName = "xxx.pdf" or "xxx.png" --> your file name
String dirPath = "/pdf/" or "/images/"; --> a directory to place created files.
filePath = dirPath + fileName
createFile(new File(getSystemPath() + filePath), content);
}
private void createFile(File file, byte[] content) {
try {
/*At First : Create directory of target file*/
String filePath = file.getPath();
int lastIndex = filePath.lastIndexOf("\\") + 1;
FileUtils.forceMkdir(new File(filePath.substring(0, lastIndex)));
/*Create target file*/
FileOutputStream outputStream = new FileOutputStream(file);
IOUtils.write(content, outputStream);
outputStream.flush();
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
Pages
<h:form enctype="multipart/form-data">
<h:commandButton value="Create"/>
<!-- Your Files is image -->
<p:graphicImage value="#{myBean.filePath}"/>
<!--
Your Files is pdf. You need PDF Viewer plugin for your browser.
My FireFox vesion is 20.0. It have default PDF Viewer.
If PDF File cannot display on your browser, it is depond on browser setting also.
-->
<p:media value="#{myBean.filePath}" width="100%" height="300px"/>
</h:form>
This question already has answers here:
How to get a file's Media Type (MIME type)?
(28 answers)
Closed 9 years ago.
I am searching for a java library which tells you the mime type by looking at the file content(byte array). I found this project using jmimemagic and it no longer supports newer file types (eg. MS word docx format) as it is inactive now (from 2006).
Maybe useful for someone, who needs the most used office formats as well (and does not use Apache Tika):
public class MimeTypeUtils {
private static final Map<String, String> fileExtensionMap;
static {
fileExtensionMap = new HashMap<String, String>();
// MS Office
fileExtensionMap.put("doc", "application/msword");
fileExtensionMap.put("dot", "application/msword");
fileExtensionMap.put("docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
fileExtensionMap.put("dotx", "application/vnd.openxmlformats-officedocument.wordprocessingml.template");
fileExtensionMap.put("docm", "application/vnd.ms-word.document.macroEnabled.12");
fileExtensionMap.put("dotm", "application/vnd.ms-word.template.macroEnabled.12");
fileExtensionMap.put("xls", "application/vnd.ms-excel");
fileExtensionMap.put("xlt", "application/vnd.ms-excel");
fileExtensionMap.put("xla", "application/vnd.ms-excel");
fileExtensionMap.put("xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
fileExtensionMap.put("xltx", "application/vnd.openxmlformats-officedocument.spreadsheetml.template");
fileExtensionMap.put("xlsm", "application/vnd.ms-excel.sheet.macroEnabled.12");
fileExtensionMap.put("xltm", "application/vnd.ms-excel.template.macroEnabled.12");
fileExtensionMap.put("xlam", "application/vnd.ms-excel.addin.macroEnabled.12");
fileExtensionMap.put("xlsb", "application/vnd.ms-excel.sheet.binary.macroEnabled.12");
fileExtensionMap.put("ppt", "application/vnd.ms-powerpoint");
fileExtensionMap.put("pot", "application/vnd.ms-powerpoint");
fileExtensionMap.put("pps", "application/vnd.ms-powerpoint");
fileExtensionMap.put("ppa", "application/vnd.ms-powerpoint");
fileExtensionMap.put("pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation");
fileExtensionMap.put("potx", "application/vnd.openxmlformats-officedocument.presentationml.template");
fileExtensionMap.put("ppsx", "application/vnd.openxmlformats-officedocument.presentationml.slideshow");
fileExtensionMap.put("ppam", "application/vnd.ms-powerpoint.addin.macroEnabled.12");
fileExtensionMap.put("pptm", "application/vnd.ms-powerpoint.presentation.macroEnabled.12");
fileExtensionMap.put("potm", "application/vnd.ms-powerpoint.presentation.macroEnabled.12");
fileExtensionMap.put("ppsm", "application/vnd.ms-powerpoint.slideshow.macroEnabled.12");
// Open Office
fileExtensionMap.put("odt", "application/vnd.oasis.opendocument.text");
fileExtensionMap.put("ott", "application/vnd.oasis.opendocument.text-template");
fileExtensionMap.put("oth", "application/vnd.oasis.opendocument.text-web");
fileExtensionMap.put("odm", "application/vnd.oasis.opendocument.text-master");
fileExtensionMap.put("odg", "application/vnd.oasis.opendocument.graphics");
fileExtensionMap.put("otg", "application/vnd.oasis.opendocument.graphics-template");
fileExtensionMap.put("odp", "application/vnd.oasis.opendocument.presentation");
fileExtensionMap.put("otp", "application/vnd.oasis.opendocument.presentation-template");
fileExtensionMap.put("ods", "application/vnd.oasis.opendocument.spreadsheet");
fileExtensionMap.put("ots", "application/vnd.oasis.opendocument.spreadsheet-template");
fileExtensionMap.put("odc", "application/vnd.oasis.opendocument.chart");
fileExtensionMap.put("odf", "application/vnd.oasis.opendocument.formula");
fileExtensionMap.put("odb", "application/vnd.oasis.opendocument.database");
fileExtensionMap.put("odi", "application/vnd.oasis.opendocument.image");
fileExtensionMap.put("oxt", "application/vnd.openofficeorg.extension");
}
public static String getContentTypeByFileName(String fileName) {
// 1. first use java's buildin utils
FileNameMap mimeTypes = URLConnection.getFileNameMap();
String contentType = mimeTypes.getContentTypeFor(fileName);
// 2. nothing found -> lookup our in extension map to find types like ".doc" or ".docx"
if (!StringUtils.hasText(contentType)) {
String extension = FilenameUtils.getExtension(fileName);
contentType = fileExtensionMap.get(extension);
}
return contentType;
}
}
Use Apache tika for content detection. Please find the link below. http://tika.apache.org/0.8/detection.html. We have so many jar dependencies which you can find when you build tika using maven
ByteArrayInputStream bai = new ByteArrayInputStream(pByte);
ContentHandler contenthandler = new BodyContentHandler();
Metadata metadata = new Metadata();
Parser parser = new AutoDetectParser();
try {
parser.parse(bai, contenthandler, metadata);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TikaException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Mime: " + metadata.get(Metadata.CONTENT_TYPE));
return metadata.get(Metadata.CONTENT_TYPE);
I use javax.activation.MimetypesFileTypeMap. It starts with a small set: $JRE_HOME/lib/content-types.properties, but you can add you own. Create a file mime.types in the format shown in MimetypesFileTypeMap's javadoc (I started with a large list from the net, massaged it, and added types I found missing). Now you can add that in your code by opening your mime.types file and adding its contents to your map. However the easier solution is to add your mime.types file to the META-INF of your jar. java.activation will pick that up automagically.
I am new to freemarker. I have a spring application that I am planning to use with freemarker. Templates will be stored in database and based on the login, I want to retrieve the template from database. Can any one tell me how to configure the freemarker in spring and get the html tags as a string after constructing the template. I did googling but I could not understand much.
I tried till this level. In spring I have done till this level. Finally I want html tags in a string.
// Spring freemarker specific code
Configuration configuration = freemarkerConfig.getConfiguration();
StringTemplateLoader stringTemplateLoader = new StringTemplateLoader();
// My application specific code
String temp = tempLoader.getTemplateForCurrentLogin();
Thanks.
To tie together the bits of code you posted, you can do something like this:
// you already have this bit
String templateText = tempLoader.getTemplateForCurrentLogin();
// now programmatically instantiate a template
Template t = new Template("t", new StringReader(templateText), new Configuration());
// now use the Spring utility class to process it into a string
// myData is your data model
String output = FreeMarkerTemplateUtils.processTemplateIntoString(template, myData);
This java method will process the freemarker template and will give html tags as String after constructing the template.
public static String processFreemarkerTemplate(String fileName) {
StringWriter stringWriter = new StringWriter();
Map<String, Object> objectMap = new HashMap<>();
Configuration cfg = new Configuration(Configuration.VERSION_2_3_24);
try {
cfg.setDirectoryForTemplateLoading(new File("path/of/freemarker/template"));
cfg.setDefaultEncoding("UTF-8");
cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
cfg.setLogTemplateExceptions(false);
Template template = cfg.getTemplate(fileName);
template.process(objectMap, stringWriter);
} catch (IOException | TemplateException e) {
e.printStackTrace();
} finally {
if (stringWriter != null) {
try {
stringWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return stringWriter.toString();
}