how to display a pdf document in jsf page in iFrame - pdf

Can anyone help me in displaying PDF document in JSF page in iframe only?
Thanks in advance,
Suresh

Just use <iframe> the usual way:
<iframe src="/path/to/file.pdf"></iframe>
If your problem is rather that the PDF is not located in the WebContent, but rather located somewhere else in disk file system or even in a database, then you basically need a Servlet which gets an InputStream of it and writes it to the OutputStream of the response:
response.reset();
response.setContentType("application/pdf");
response.setContentLength(file.length());
response.setHeader("Content-disposition", "inline; filename=\"" + file.getName() + "\"");
BufferedInputStream input = null;
BufferedOutputStream output = null;
try {
input = new BufferedInputStream(new FileInputStream(file), DEFAULT_BUFFER_SIZE);
output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);
byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
} finally {
close(output);
close(input);
}
This way you can just point to this servlet instead :) E.g.:
<iframe src="/path/to/servlet/file.pdf"></iframe>
You can find a complete example of a similar servlet in this article.
The <iframe> also works fine in JSF, assuming that you're using JSF 1.2 or newer. In JSF 1.1 or older you have to wrap plain vanilla HTML elements such as <iframe> inside a <f:verbatim> so that they will be taken into the JSF component tree, otherwise they will be dislocated in the output:
<f:verbatim><iframe src="/path/to/servlet/file.pdf"></iframe></f:verbatim>

I recommend you to have a look at http://www.jpedal.org/. You can convert each of the pdf pages to images and deliver them separately to the browser.
This approach is more secure for your application, since the pdf is never send to the client.

Related

pe:documentViewer not displaying digital signatures in PDF

I have a multi-format document viewer, in which, for displaying PDFs, I use PF Extension's p:documentViewer component. The backing bean that supplies the StreamedContent of the PDF is phase rendered and is working as expected. However, though the PDF itself gets rendered fine, the viewer doesn't display the digital signatures in it. Do I need to add any extra configurations to the p:documentViewer while using it? Here is my usage of it:
<pe:documentViewer id="pdfVw" height="600" width="800" value="#{viewerController4.pdfDocumentStream}">
<f:param name="id" value="#{viewerController4.currentDocId}" />
</pe:documentViewer>
The backing bean method serving the content of the PDF:
public StreamedContent getPdfDocumentStream() throws IOException {
FacesContext context = FacesContext.getCurrentInstance();
if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE) {
return new DefaultStreamedContent();
} else {
String id = context.getExternalContext().getRequestParameterMap().get("id");
Doc doc = pdfDocMap.get(id);
return new DefaultStreamedContent(new FileInputStream(new File(doc.getDocPath())), "application/pdf", doc.getDocName());
}
}
Incidentally, I also have a feature on the UI, to display thumbnails of documents -- in which, for PDFs, I extract the first page using PDFBox and convert that into a PNG image and display within a p:graphicImage. I observe, that in this image, the digital signature is displayed fine!
I'm on SpringBoot + PF 6.2 + JoinFaces
If you need to display PDF with digital signatures PDF.js does not support it currently and the ticket has been open since 2012.
See: https://github.com/mozilla/pdf.js/issues/1076
I suggest you use these service which is free and runs in the browser to show PDF's with signatures: https://verify.ink/

Print PDF in Website

I have been searching for days for a solution to this problem.
Description : I have a website which loads a PDF dynamically via an iFrame. The PDF is saved on the server and the user of the website can view the pdf on the website.
Problem : Introduce a Print button on website which prints the PDF which was created dynamically and saved on the server.
Is this even possible ? I am looking at a cross-browser implementation as well to make things worse. I have tried n number of JS options from the web but none of them seem to work. I can not seem to get the PDF printed in the same way as it looks. To put it short, I am trying to emulate the print button which appears on the PDF when it is loaded. Is there an option to pass the pdf document from the server to the print dialog box ?
Description : I have a website which loads a PDF dynamically via an iFrame. The PDF is saved on the server and the user of the website can view the pdf on the website.
Problem : Introduce a Print button on website which prints the PDF which was created dynamically and saved on the server.
Solution : I could not find an exact solution to this problem, but here is how I solved the problem -
Create the 'Print' as per req and redirect that to another page which has only the PDF.
Copy the previous PDF & Create new PDF with JS - this.print() such that when it opens up, the print dialog pops up directly to the user.
In the new page -
if ("Location of PDF " != null)
{
sPdf = "Location of PDF ";
PdfReader pReader = new PdfReader(sPdf);
Document document = new Document
(pReader.GetPageSizeWithRotation(ApplicationConstants.INDEX_ONE));
int n = pReader.NumberOfPages;
FileStream fs = new FileStream
("New PDF location",
FileMode.Create, FileAccess.Write);
PdfCopy copy = new PdfCopy(document, fs);
// Write to pdf
document.Open();
for (int i = ApplicationConstants.INDEX_ONE; i <= n; i++)
{
PdfImportedPage page = copy.GetImportedPage(pReader, i);
copy.AddPage(page);
}
copy.AddJavaScript("this.print(true);", true);
document.Close();
pReader.Close();
inStr = File.OpenRead("New PDF location");
while ((bytecnt = inStr.Read
(buffer, ApplicationConstants.INDEX_ZERO, buffer.Length))
> ApplicationConstants.INDEX_ZERO)
{
if (Context.Response.IsClientConnected)
{
Context.Response.ContentType = "application/PDF";
Context.Response.OutputStream.Write(buffer,
ApplicationConstants.INDEX_ZERO, buffer.Length);
Context.Response.Flush();
}
}
}
Please note that I am using itextsharp to inject the JS script into the new PDF. Hope this helps someone else. I am trying to find another solution without the usage of itextsharp or any other dll but this will have to do for now.
I am not sure if this will work, but you could try launching a popup window with a special version of your PDF file that opens the print dialog when opened. Then close the popup afterwards. This last part might be tricky since I think there is no clean way to know if the print dialog has been closed.

Primefaces generate pdf and display on click of button

I have a requirement in which I have to generate a pdf and then on click of button "SHOW PDF", I have to display on another window.
I have been able to generate a pdf using IText and stored in my machine. I get a java.io.File object as my return value from my backend library which needs to be displayed on the screen. Can someone please guide me how to do this?
My xhtml file has the following code snippet:
<h:commandLink action="PdfDisplayRedirect.xhtml" target="_blank">show PDF</h:commandLink>
my PdfDisplayRedirect.xhtml has the following code:
<p:media value="#{pdfGenerationAction.fileName}" width="100%" height="300px">
Your browser can't display pdf, <h:outputLink value="InitialExamination33.pdf">click</h:outputLink> to download pdf instead.
My backing bean has the following code:
private File initialExaminationFile;
private generateFile(){
this.initialExaminationFile = backendService.generateFile();
}
On clicking, I get a new window opened but the pdf file is not displayed.. Instead my screen from where I had invoked the command gets displayed there.
Any help would be really appreciated.
Thanks
Thanks for the response and no response.
I have found a solution myself which I would like to post so that those looking for a solution can use it.
My xhtml file included a commandlink
<p:commandLink actionListener="#{pdfGenerationAction.generatePDF(initialExaminationEMRAction.patientID)}" oncomplete="window.open('PdfDisplayRedirect.xhtml')">broadcast Msg</p:commandLink>
My pdfGenerationAction bean file had the following lines of code:
FileInputStream fis = new FileInputStream(this.initialExaminationFile);
//System.out.println(file.exists() + "!!");
//InputStream in = resource.openStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
try {
for (int readNum; (readNum = fis.read(buf)) != -1;) {
bos.write(buf, 0, readNum); //no doubt here is 0
//Writes len bytes from the specified byte array starting at offset off to this byte array output stream.
System.out.println("read " + readNum + " bytes,");
}
this.reportBytes = buf;
}
I converted my file into bytearraystream and made it available in my session. Then I followed the suggestion given by BalusC at Unable to show PDF in p:media generated from streamed content in Primefaces

PDF Rendering issues in IE 8 & above using ASP.Net

I have been plucking my hair and hitting my head all around due to the PDF rendering issues. All is well when we used IE 7 & below. But this year we started supporting the latest browsers IE 8 & above and everything goes wild.
Actually I have used an iframe to render the inline PDF, this works fine with IE7 & below But now using IE8, lot of users started complaining that the PDF is displayed as blank inside the iframe (just displays a grey box). I have used the following code to render the pdf in iframe.
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.Buffer = false;
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", doc.Length.ToString());
Response.AddHeader("content-disposition", "inline; filename=\"" + fileName + "\"");
Response.AddHeader("Accept-Header", doc.Length.ToString());
Response.BinaryWrite(doc);
Response.Flush();
Response.Close();
Response.End();
But it didn't work properly. Then after googling I thought of using tag to render the pdf. So, for that I first created the pdf document and stored in the server. But in this approach also I have two issues:
1) The file is not getting created properly. See the below methods which I tries to create the PDF file using byte[] array. Also, this works perfectly in my local but in the server it both method creates a 1 KB file. I think it is unable to write the whole byte[] array.
a) System.IO.File.WriteAllBytes(fileFullPath, doc);
b) using (System.IO.Stream stream = new System.IO.FileStream(fileFullPath, System.IO.FileMode.Create))
{
stream.Write(attestationDoc, 0, attestationDoc.Length);
}
2) This is the object tag I am using but the problem is, this works only when the file resides in the root of the project and it is not working if the file is inside any other project folder. Actually I tried to use Server.MapPath but it is not working.
<object data="data\test.pdf" type="application/pdf" width="860px" height="470px">
<embed src="data\test.pdf" type="application/pdf"/>
</object>
So, please help me it is very urgent.
If any of the above method works I am fine that.

How to get an image from mshtml.htmlimg to hard disk

Without using API?
I know there are several way.
I am using mshtml library by the way, which is better than webbrowser control. I am effectively automating internet explorer straight.
Basically I prefer a way to take the image straight without having to know the URL of the htmlimg and download it.
I know I can take URL from the image element and downloading it with webclient. The image changes depending on cookies and IP. So that wouldn't do.
I want the exact images displayed by the htmlimg element to be the one stored.
Basically as if someone is taking a local screenshot of what shows up on screen.
There's an old solution for this here:
http://p2p.wrox.com/c/42780-mshtml-how-get-images.html#post169674
These days though you probably want to check out the Html Agility Pack:
http://htmlagilitypack.codeplex.com/
The documentation isn't exactly great however; so this code snippet may help:
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(html);
// You can also load a web page by utilising WebClient and loading in the stream - use one of the htmlDoc.Load() overloads
var body = htmlDoc.DocumentNode.Descendants("body").FirstOrDefault();
foreach (var img in body.Descendants("img"))
{
var fileUrl = img.Attributes["src"].Value;
var localFile = #"c:\localpath\tofile.jpg";
// Download the image using WebClient:
using (WebClient client = new WebClient())
{
client.DownloadFile("fileUrl", localFile);
}
}