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import java.io.*;
import javax.servlet.*;
import java.util.*;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.FilenameUtils;
public class SciExec extends GenericServlet {
public void service(ServletRequest request,ServletResponse response) throws ServletException, IOException
{
PrintWriter pw = response.getWriter();
InputStream is = null;
ByteArrayOutputStream baos = null;
List<String> commands = new ArrayList<String>();
commands.add("scilab-adv-cli");
commands.add("-noatomsautoload");
commands.add("-nogui");
commands.add("-nb");
commands.add("-e");
String imagePath="";
String fileNameWithoutExt="";
//commands.add("plot3d();xs2png(gcf(),'img2.png');exit();");
/*String data=request.getParameter("name");
pw.println(data);
commands.add("echo "+data+" > /home/saarang/Softwares/apache-tomcat-8.0.36/webapps/sci/servlet/file.xcos");*/
//commands.add("driver('PNG');xinit('/home/saarang/apache-tomcat-8.0.36/webapps/worknogui/servlet/ans"+k+".png');loadXcosLibs();importXcosDiagram('/home/saarang/apache-tomcat-8.0.36/file.xcos');xcos_simulate(scs_m,4);mode(2);xend();quit();");
ProcessBuilder pb = new ProcessBuilder(commands);
try
{
InputStream inputStream = request.getInputStream();
File xcosFile = File.createTempFile("usr-", ".xcos");
OutputStream outputStream = new FileOutputStream(xcosFile);
IOUtils.copy(inputStream, outputStream);
outputStream.close();
String tempPath = xcosFile.getAbsolutePath();
String parentPath = xcosFile.getParent();
fileNameWithoutExt = FilenameUtils.removeExtension(xcosFile.getName());
imagePath = "/home/saarang/apache-tomcat-8.0.36/webapps/xcos-on-web/servlet"+File.separator + fileNameWithoutExt + ".png";
commands.add("driver('PNG');xinit('"+imagePath+"');loadXcosLibs();importXcosDiagram('"+tempPath+"');xcos_simulate(scs_m,4);mode(2);xend();quit();");
Process prs = pb.start();
is = prs.getInputStream();
byte[] b = new byte[1024];
int size = 0;
baos = new ByteArrayOutputStream();
while((size = is.read(b)) != -1){
baos.write(b, 0, size);
}
System.out.println(new String(baos.toByteArray()));
}
catch (IOException e)
{
e.printStackTrace();
}
catch(Exception e)
{
/*System.out.println(e.toString()+"Some Exception");*/
pw.println("Exception");
}
finally
{
try {
if(is != null) is.close();
if(baos != null) baos.close();
} catch (Exception ex){}
}
pw.println("servlet/"+fileNameWithoutExt+".png");
//pw.println(request.getParameter("name"));
pw.close();
}
}
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