/**
* 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;
}
