2010-02-03 03:29:47 +01:00
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package com.metaweb.gridworks.commands;
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2010-01-25 23:51:25 +01:00
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.LineNumberReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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2010-01-27 23:27:22 +01:00
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import java.io.PrintWriter;
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2010-01-25 23:51:25 +01:00
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import java.io.Reader;
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2010-01-27 23:27:22 +01:00
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import java.io.StringWriter;
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2010-01-25 23:51:25 +01:00
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import java.util.Properties;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.lang.NotImplementedException;
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2010-02-03 10:27:53 +01:00
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import org.json.JSONArray;
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2010-01-25 23:51:25 +01:00
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import org.json.JSONException;
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import org.json.JSONObject;
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import org.json.JSONTokener;
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2010-02-01 20:16:09 +01:00
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import org.json.JSONWriter;
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2010-01-25 23:51:25 +01:00
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2010-02-03 03:29:47 +01:00
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import com.metaweb.gridworks.Jsonizable;
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import com.metaweb.gridworks.ProjectManager;
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import com.metaweb.gridworks.browsing.Engine;
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import com.metaweb.gridworks.model.Project;
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2010-01-25 23:51:25 +01:00
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import com.oreilly.servlet.multipart.FilePart;
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import com.oreilly.servlet.multipart.MultipartParser;
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import com.oreilly.servlet.multipart.ParamPart;
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import com.oreilly.servlet.multipart.Part;
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public abstract class Command {
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public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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throw new NotImplementedException();
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};
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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throw new NotImplementedException();
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};
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protected Project getProject(HttpServletRequest request) throws ServletException {
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try {
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Project p = ProjectManager.singleton.getProject(Long.parseLong(request.getParameter("project")));
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if (p != null) {
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return p;
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}
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} catch (Exception e) {
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// ignore
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}
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throw new ServletException("Missing or bad project URL parameter");
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}
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protected int getIntegerParameter(HttpServletRequest request, String name, int def) throws ServletException {
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try {
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return Integer.parseInt(request.getParameter(name));
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} catch (Exception e) {
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// ignore
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}
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return def;
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}
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protected void respond(HttpServletResponse response, String content) throws IOException {
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response.setStatus(HttpServletResponse.SC_OK);
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OutputStream os = response.getOutputStream();
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OutputStreamWriter osw = new OutputStreamWriter(os);
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try {
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osw.write(content);
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} finally {
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osw.flush();
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osw.close();
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}
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}
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2010-02-01 20:16:09 +01:00
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protected void respondJSON(HttpServletResponse response, Jsonizable o) throws IOException, JSONException {
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respondJSON(response, o, new Properties());
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}
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protected void respondJSON(HttpServletResponse response, Jsonizable o, Properties options) throws IOException, JSONException {
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2010-02-02 02:36:02 +01:00
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response.setCharacterEncoding("UTF-8");
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2010-01-27 23:27:22 +01:00
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response.setHeader("Content-Type", "application/json");
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2010-02-01 20:16:09 +01:00
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JSONWriter writer = new JSONWriter(response.getWriter());
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o.write(writer, options);
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2010-01-25 23:51:25 +01:00
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}
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protected void respondException(HttpServletResponse response, Exception e) throws IOException {
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2010-02-07 04:36:40 +01:00
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e.printStackTrace();
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2010-01-27 23:27:22 +01:00
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try {
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JSONObject o = new JSONObject();
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o.put("code", "error");
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o.put("message", e.getMessage());
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StringWriter sw = new StringWriter();
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PrintWriter pw = new PrintWriter(sw);
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e.printStackTrace(pw);
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pw.flush();
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sw.flush();
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o.put("stack", sw.toString());
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2010-02-01 20:16:09 +01:00
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response.setHeader("Content-Type", "application/json");
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respond(response, o.toString());
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2010-01-27 23:27:22 +01:00
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} catch (JSONException e1) {
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e.printStackTrace(response.getWriter());
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}
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2010-01-25 23:51:25 +01:00
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}
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protected void redirect(HttpServletResponse response, String url) throws IOException {
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response.setStatus(HttpServletResponse.SC_OK);
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String content = "<html><head><meta http-equiv=\"refresh\" content=\"1;url=" + url + "\"></head><body></body></html>";
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response.getWriter().print(content);
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}
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protected String readFileUpload(HttpServletRequest request, Properties properties) throws IOException {
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StringBuffer sb = new StringBuffer();
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try {
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MultipartParser parser = new MultipartParser(request, 20 * 1024 * 1024);
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Part part = null;
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while ((part = parser.readNextPart()) != null) {
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if (part.isFile()) {
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Reader reader = new InputStreamReader(((FilePart) part).getInputStream());
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LineNumberReader lnr = new LineNumberReader(reader);
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try {
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String line = null;
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while ((line = lnr.readLine()) != null) {
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sb.append(line);
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sb.append('\n');
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}
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} finally {
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lnr.close();
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}
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} else if (part.isParam()) {
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ParamPart paramPart = (ParamPart) part;
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properties.put(part.getName(), paramPart.getStringValue());
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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return sb.toString();
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}
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protected JSONObject getJsonParameter(HttpServletRequest request, String name) {
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String value = request.getParameter(name);
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if (value != null) {
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try {
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JSONObject o = jsonStringToObject(value);
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return o;
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} catch (JSONException e) {
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}
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}
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return null;
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}
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protected JSONObject jsonStringToObject(String s) throws JSONException {
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JSONTokener t = new JSONTokener(s);
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JSONObject o = (JSONObject) t.nextValue();
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return o;
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}
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2010-01-28 02:43:09 +01:00
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2010-02-03 10:27:53 +01:00
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protected JSONArray jsonStringToArray(String s) throws JSONException {
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JSONTokener t = new JSONTokener(s);
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JSONArray a = (JSONArray) t.nextValue();
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return a;
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}
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2010-02-04 21:51:44 +01:00
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protected JSONObject getEngineConfig(HttpServletRequest request) throws Exception {
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String json = request.getParameter("engine");
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if (json != null) {
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return jsonStringToObject(json);
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}
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return null;
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}
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2010-01-28 02:43:09 +01:00
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protected Engine getEngine(HttpServletRequest request, Project project) throws Exception {
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Engine engine = new Engine(project);
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2010-01-30 02:05:30 +01:00
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String json = request.getParameter("engine");
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if (json != null) {
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2010-01-28 02:43:09 +01:00
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JSONObject o = jsonStringToObject(json);
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engine.initializeFromJSON(o);
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}
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return engine;
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}
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2010-01-25 23:51:25 +01:00
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}
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