I'm trying to retrieve a jasper report with RESTV1 webservices and then display it.I used this code:
<%@ page import="java.io.*" %><%
%><%@ page import="javax.xml.parsers.*" %><%
%><%@ page import="org.w3c.dom.*" %><%
%><%@ page import="org.xml.sax.*" %><%
%><%@ page import="javax.xml.transform.*" %><%
%><%@ page import="javax.xml.transform.dom.*" %><%
%><%@ page import="javax.xml.transform.stream.*" %><%
%><%@ page import="org.apache.commons.httpclient.HttpClient" %><%
%><%@ page import="org.apache.commons.httpclient.HttpStatus" %><%
%><%@ page import="org.apache.commons.httpclient.methods.PostMethod" %><%
%><%@ page import="org.apache.commons.httpclient.methods.PutMethod" %><%
%><%@ page import="org.apache.commons.httpclient.methods.GetMethod" %><%
%><%@page contentType="application/pdf" %><%
String serverURL = "http://pc-demo-bi:8090/jasperserver-pro/";
String reportName = "/public/folder1/1._Geographic_Results_by_Segment_Report";
String reportFormat ="pdf";
String res=null;
HttpClient client = new HttpClient();
// Setting Login URL in a POST method
String loginURL = serverURL+"rest/login";
PostMethod postMethod = new PostMethod(loginURL);
// Set authentication parameters
postMethod.addParameter("j_username", "superuser");
postMethod.addParameter("j_password", "superuser");
// Send POST with login request
int statusCode = client.executeMethod(postMethod);
// Check correct login process
if (statusCode != HttpStatus.SC_OK) {
System.out.println("Login failed: " + postMethod.getStatusLine());
return;
}
System.out.println("I/'m happy");
// Settting resource URL in a GET method to get descriptor
String resourceURL = serverURL+"rest/resource/"+reportName;
GetMethod getMethod = new GetMethod(resourceURL);
// Send GET request for descriptor
statusCode = client.executeMethod(getMethod);
// Check correct descriptor process
if (statusCode != HttpStatus.SC_OK) {
System.out.println("Descriptor failed: " + getMethod.getStatusLine());
}
System.out.println("I/'m much happy");
// Get the response body as String
String descriptorSource = getMethod.getResponseBodyAsString();
System.out.println(descriptorSource);
//Transform descriptor from String into XML Document
Document descriptorXML = stringToDom(descriptorSource);
// Use this method if you need to send parameters to the report
// These are added to the XML Document
//addParameter(descriptorXML, "personID", "1244");
// Settting PUT method to run report, the url contains the RUN_OUTPUT_FORMAT parameter
String reportURL = serverURL+"rest/report/"+reportName+"?RUN_OUTPUT_FORMAT="+reportFormat;
PutMethod putMethod = new PutMethod(reportURL);
// Setting the request Body. The descriptor XML Document is transform to String and add to the request body.
putMethod.setRequestBody(descriptorSource);
// Send PUT request to execute the report.
statusCode = client.executeMethod(putMethod);
// Check correct report process
if (statusCode != 201) {
System.out.println("Report failed: " + putMethod.getStatusLine());
}
System.out.println("I'm very very happy");
// Get the response body
String reportSource = putMethod.getResponseBodyAsString();
System.out.println(reportSource);
// Transform report information into XML Document.
Document reportXML = stringToDom(reportSource);
// Extrac from XML Document the report's UUID
NodeList nodes = reportXML.getElementsByTagName("uuid");
String reportUuid = nodes.item(0).getTextContent();
System.out.println(reportUuid);
// Setting GET request to download the report
String reportFileURL = serverURL+"rest/report/"+reportUuid+"?file=report";
GetMethod getMethodFile = new GetMethod( reportFileURL );
//Send GET request to download the report
statusCode = client.executeMethod(getMethodFile);
// Check correct report process
if (statusCode != 200) {
System.out.println("Downlaod failed: " + putMethod.getStatusLine());
}
System.out.println("I'm very very very happy");
/* InputStreamReader isr = new InputStreamReader(getMethodFile.getResponseBodyAsStream());
BufferedReader in = new BufferedReader(isr);
String str;
StringBuffer accumule = new StringBuffer();
while ((str = in.readLine()) != null) {
System.out.println(str);
accumule.append(str);
}
in.close();
res = accumule.toString();
PrintWriter writer = response.getWriter();
writer.write( res);
writer.flush();
out.println(res); */
// Getting the report body
InputStream is = getMethodFile.getResponseBodyAsStream();
BufferedInputStream bis = new BufferedInputStream( is );
String datastr = null;
StringBuffer sb = new StringBuffer();
byte[] bytes = new byte[ 8192 ];
int count = bis.read( bytes );
while( count != -1 && count <= 8192 ){
out.print(new String(bytes, 0, count));
count = bis.read( bytes );
}
bis.close();
%><%!
public static Document stringToDom(String xmlSource) throws SAXException, ParserConfigurationException, IOException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
StringReader sr = new StringReader(xmlSource);
InputSource is = new InputSource(sr);
return builder.parse(is);
}
public static String domToString( Document xml ) throws Exception{
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(xml), new StreamResult(writer));
return writer.getBuffer().toString().replaceAll("n|r", "");
}
//Adds node like <parameter name ="exampleParm1" >value</parameter>
public static void addParameter(Document doc,String name, String value){
Element element = doc.getDocumentElement();
Element node = doc.createElement("parameter");
node.setAttribute("name",name);
CDATASection cdata = doc.createCDATASection(value);
node.appendChild(cdata);
element.appendChild(node);
}
%>
I have succeded to display a report in html and PDF but I can't visualize it's content.The report is given in the format required but empty.Any suggestions please ?Thanks in advance
