Jasper Report Library: how to directly open a pdf report to browser without writing pdf file to disk

[matteo.agostoni]

I have developed an application in PHP that uses JasperReports library and runs a report from PHP. To make PHP and jasper reports library to comunicate, I installed PHP/Java Bridge on Tomcat, so that php application can speak with java.

I made a simple prototype of the php code that comunicate with java and run jasper report. Here the code:

<?php/*  This file is free software: you can redistribute it and/or modify  it under the terms of the GNU General Public License as published by  the Free Software Foundation, either version 3 of the License, or  (at your option) any later version.

  This file is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License  along with This file.  If not, see <http://www.gnu.org/licenses/>. */

require_once("http://localhost:8080/JavaBridge/java/Java.inc");

try {

    $jasperxml = new Java("net.sf.jasperreports.engine.xml.JRXmlLoader");

    $jasperDesign = $jasperxml->load(realpath("customer.jrxml"));

    $query = new Java("net.sf.jasperreports.engine.design.JRDesignQuery");

    $query->setText("SELECT customer.first_name AS customer_first_name, customer.last_name AS customer_last_name, customer.email AS customer_email FROM  customer customer");

    $jasperDesign->setQuery($query);

    $compileManager = new JavaClass("net.sf.jasperreports.engine.JasperCompileManager");

    $report = $compileManager->compileReport($jasperDesign);}

 catch (JavaException $ex) {    echo $ex;}

$fillManager = new JavaClass("net.sf.jasperreports.engine.JasperFillManager");

$params = new Java("java.util.HashMap");

$params->put("title", "Customer");

$class = new JavaClass("java.lang.Class");

$class->forName("com.mysql.jdbc.Driver");

$driverManager = new JavaClass("java.sql.DriverManager");

$conn = $driverManager->getConnection("jdbc:mysql://localhost:3306/sakila?zeroDateTimeBehavior=convertToNull", "myuser", "mypassword");

$jasperPrint = $fillManager->fillReport($report, $params, $conn);

$exporter = new java("net.sf.jasperreports.engine.JRExporter");

$outputPath = realpath(".") . "/" . "output.pdf";

$exporter = new java("net.sf.jasperreports.engine.export.JRPdfExporter");

$exporter->setParameter(java("net.sf.jasperreports.engine.JRExporterParameter")->JASPER_PRINT, $jasperPrint);

$exporter->setParameter(java("net.sf.jasperreports.engine.JRExporterParameter")->OUTPUT_FILE_NAME, $outputPath);

header("Content-type: application/pdf");

header("Content-Disposition: attachment; filename=output.pdf");

$exporter->exportReport();

readfile($outputPath);

unlink($outputPath);?>[/code]

 

The code is correctly runnning. As you can see, actually the code export the report to pdf file and then open the browser. I would like to know how I could directly open the report in the browser without writing the pdf file on disk; in this way I can avoid to give write permission on the directory.