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images/image_from_url

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/* $Id: image_from_url.java,v 1.7 2014/01/30 14:05:25 rjs Exp $

 * Image from URL:

 * Read an image from an URL and place it in a PDF document

 *

 * Read an image from the URL and store into a PDFlib virtual file (PVF).

 * Then, load the image data from the PVF and place it on the page.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.images;

import java.io.*;

import java.net.*;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class image_from_url

{

    public static void main (String argv[])

    {

        /* This is where the data files are. Adjust as necessary. */

        String searchpath = "../input";

        String outfile = "image_from_url.pdf";

        String title = "Image from URL";


        pdflib p = null;

        int exitcode = 0;

        final String image_url = "http://www.pdflib.com/uploads/media/logo_01.gif";

        byte[] imageData = null;

        URL url = null;


        try {

            byte[] buffer = new byte[1024];

            

            /* Read an image from a Web site */

            url = new URL(image_url);

            

            InputStream inp = url.openStream();

            ByteArrayOutputStream bufferStream = new ByteArrayOutputStream();

            

            int bytesRead;

            while ((bytesRead = inp.read(buffer)) != -1) {

                bufferStream.write(buffer, 0, bytesRead);

            }

            

            imageData = bufferStream.toByteArray();

            

            try {

                p = new pdflib();


                p.set_option("searchpath={" + searchpath + "}");


                /* This means we must check return values of load_font() etc. */

                p.set_option("errorpolicy=return");

     

                if (p.begin_document(outfile, "") == -1)

                    throw new Exception("Error: " + p.get_errmsg());


                p.set_info("Creator", "PDFlib Cookbook");

                p.set_info("Title", title + " $Revision: 1.7 $");

                            

                /* Store the image in a PDFlib virtual file (PVF) called

                 * "/pvf/image"

                 */

                p.create_pvf("/pvf/image", imageData, "");


                /* Load the image from the PVF */

                int image = p.load_image("auto", "/pvf/image" , "");

                if (image == -1)

                    throw new Exception("Error: " + p.get_errmsg());


                /* Start a page, place the image, and finish the page */

                p.begin_page_ext(400, 200, "");

                p.fit_image(image, 50, 100, "");

                p.end_page_ext("");


                /* Delete the virtual file to free the allocated memory */

                p.delete_pvf("/pvf/image");


                p.end_document("");


            } catch (PDFlibException e) {

                System.err.print("PDFlib exception occurred:\n");

                System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +

                    ": " + e.get_errmsg() + "\n");

                exitcode = 1;

            } catch (Exception e) {

                System.err.println(e.getMessage());

                exitcode = 1;

            } finally {

                if (p != null) {

                    p.delete();

                }

                System.exit(exitcode);

            }

        } catch (IOException e) {

            System.err.print("Exception occurred: URL " + image_url +

                " is not available\n");

                e.printStackTrace();

            System.exit(exitcode);

        }

    }

}