Example #1
0
  /**
   * Executes a command as {@code user}. Saves the stdout/stderr in the corresponding fields and
   * returns the return code of the child process.
   *
   * @param cmd The command to execute
   * @param data The data to send to the stdin of the process
   * @param timelimt How many seconds the command can run
   * @param memlimit How many megabytes the command can use
   */
  private int exec(String cmdS, String data, int timelimit, int memlimit) throws Exception {
    ArrayList<String> cmd = new ArrayList<String>(cmdPrefix);
    cmd.add("-m");
    cmd.add("" + memlimit);
    cmd.add("-c");
    cmd.add("" + timelimit);
    cmd.add("-w");
    cmd.add("" + (3 * timelimit + 1));
    cmd.add("-x");
    cmd.add(cmdS);
    String tmp = "";
    for (String cs : cmd) tmp += " \"" + cs + "\"";
    log.fine("exec " + tmp);
    ProcessBuilder pb = new ProcessBuilder(cmd);
    pb.directory(workDir);
    Process p = pb.start();
    OutputStreamWriter writer = new OutputStreamWriter(p.getOutputStream());
    StreamReader rOut = new StreamReader(p.getInputStream());
    StreamReader rErr = new StreamReader(p.getErrorStream());
    rOut.start();
    rErr.start();

    // TODO I think this may block for big tests. Check and Fix.
    // send and receive data "in parallel"
    writer.write(data);
    writer.flush();
    writer.close();
    rOut.join();
    rErr.join();
    stdout = rOut.result;
    stderr = rErr.result;
    if (rOut.exception != null) throw rOut.exception;
    if (rErr.exception != null) throw rErr.exception;

    // log.finer("out: " + stdout);
    // log.finer("err: " + stderr);
    // log.finer("done exec");
    return p.waitFor();
  }
 /**
  * This calls the external Moodle web service.
  *
  * <p>params String containing the parameters of the call.<br>
  * elements NodeList containing name/value pairs of returned XML data.
  *
  * @param params String
  * @return elements NodeList
  * @throws MoodleRestException
  */
 public static NodeList call(String params) throws MoodleRestException {
   NodeList elements = null;
   try {
     URL getUrl = new URL(url);
     HttpURLConnection connection = (HttpURLConnection) getUrl.openConnection();
     connection.setRequestMethod("POST");
     connection.setRequestProperty("Accept", "application/xml");
     connection.setDoOutput(true);
     OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
     writer.write(params);
     writer.flush();
     writer.close();
     // Used for testing
     StringBuilder buffer = new StringBuilder();
     BufferedReader reader =
         new BufferedReader(new InputStreamReader(connection.getInputStream()));
     String line = reader.readLine();
     buffer.append(line).append('\n');
     // FindPath fp=new FindPath();
     InputStream resource =
         ClassLoader.getSystemClassLoader()
             .getResourceAsStream("net/beaconhillcott/moodlerest/EntityInjection.xml");
     BufferedReader entities = new BufferedReader(new InputStreamReader(/*fp.*/ resource));
     String entitiesLine = null;
     while ((entitiesLine = entities.readLine()) != null) {
       // System.out.println(entitiesLine);
       buffer.append(entitiesLine).append('\n');
     }
     entities.close();
     boolean error = false;
     while ((line = reader.readLine()) != null) {
       // System.out.println(line);
       if (error)
         throw new MoodleRestException(
             line.substring(line.indexOf('>') + 1, line.indexOf('<', line.indexOf('>') + 1)));
       if (line.contains("<EXCEPTION")) error = true;
       buffer.append(line).append('\n');
     }
     reader.close();
     if (debug) {
       System.out.println(buffer.toString());
     }
     XPath xpath = XPathFactory.newInstance().newXPath();
     // InputSource source=new InputSource(connection.getInputStream());
     InputSource source = new InputSource(new ByteArrayInputStream(buffer.toString().getBytes()));
     elements = (NodeList) xpath.evaluate("//VALUE", source, XPathConstants.NODESET);
     // Used for testing
     if (debug) {
       for (int i = 0; i < elements.getLength(); i++) {
         String parent =
             elements
                 .item(i)
                 .getParentNode()
                 .getParentNode()
                 .getParentNode()
                 .getParentNode()
                 .getNodeName();
         if (parent.equals("KEY"))
           parent =
               elements
                   .item(i)
                   .getParentNode()
                   .getParentNode()
                   .getParentNode()
                   .getParentNode()
                   .getAttributes()
                   .getNamedItem("name")
                   .getNodeValue();
         String content = elements.item(i).getTextContent();
         String nodeName =
             elements.item(i).getParentNode().getAttributes().getNamedItem("name").getNodeValue();
         System.out.println("parent=" + parent + " nodeName=" + nodeName + " content=" + content);
       }
     }
     connection.disconnect();
   } catch (XPathExpressionException ex) {
     Logger.getLogger(MoodleCallRestWebService.class.getName()).log(Level.SEVERE, null, ex);
   } catch (IOException ex) {
     Logger.getLogger(MoodleCallRestWebService.class.getName()).log(Level.SEVERE, null, ex);
   }
   return elements;
 }