ru.tsystems.restserviceclient.PDFactory.java Source code

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Here is the source code for ru.tsystems.restserviceclient.PDFactory.java

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package ru.tsystems.restserviceclient;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

@ManagedBean(name = "pdfBean")
@SessionScoped
public class PDFactory {

    public void createDocument() {
        Document document = new Document();
        try {
            File file = new File("/tmp/tickets.pdf");
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
            document.open();
            document.add(new Paragraph("A Hello World PDF document."));
            document.close();
            writer.close();
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    //    public void downloadFile() {
    //
    //        File file = new File("/tmp/tickets.pdf");
    //        HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
    //
    //        response.setHeader("Content-Disposition", "attachment;filename=tickets.pdf");
    //        response.setContentLength((int) file.length());
    //        ServletOutputStream out = null;
    //        try {
    //            FileInputStream input = new FileInputStream(file);
    //            byte[] buffer = new byte[1024];
    //            out = response.getOutputStream();
    //            int i = 0;
    //            while ((i = input.read(buffer)) != -1) {
    //                out.write(buffer);
    //                out.flush();
    //            }
    //            FacesContext.getCurrentInstance().getResponseComplete();
    //        } catch (IOException err) {
    //            err.printStackTrace();
    //        } finally {
    //            try {
    //                if (out != null) {
    //                    out.close();
    //                }
    //            } catch (IOException err) {
    //                err.printStackTrace();
    //            }
    //        }
    //    }

    public void downloadFile() throws IOException {
        HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext()
                .getResponse();
        try {
            // Get the text that will be added to the PDF
            String text = "You didn't enter any text.";
            if (text == null || text.trim().length() == 0) {
                text = "You didn't enter any text.";
            }
            // step 1
            Document document = new Document();
            // step 2
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            PdfWriter.getInstance(document, baos);
            // step 3
            document.open();
            // step 4
            document.add(new Paragraph("You have submitted the following text using the %s method:"));
            document.add(new Paragraph(text));
            // step 5
            document.close();

            // setting some response headers
            response.setHeader("Expires", "0");
            response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
            response.setHeader("Pragma", "public");
            // setting the content type
            response.setContentType("application/pdf");
            // the contentlength
            response.setContentLength(baos.size());
            // write ByteArrayOutputStream to the ServletOutputStream
            OutputStream os = response.getOutputStream();
            baos.writeTo(os);
            os.flush();
            os.close();
            FacesContext.getCurrentInstance().getResponseComplete();
        } catch (DocumentException e) {
            throw new IOException(e.getMessage());
        }

    }

}