org.eclipse.orion.server.npm.NpmServlet.java Source code

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Here is the source code for org.eclipse.orion.server.npm.NpmServlet.java

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/*******************************************************************************
 * Copyright (c) 2010, 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.orion.server.npm;

import java.io.*;
import java.net.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.orion.internal.server.servlets.file.NewFileServlet;
import org.eclipse.orion.server.core.PreferenceHelper;
import org.eclipse.orion.server.servlets.OrionServlet;
import org.json.JSONException;
import org.json.JSONObject;

/*
 * 
 */
public class NpmServlet extends OrionServlet {

    private static final long serialVersionUID = 1L;

    public NpmServlet() {
        super();
    }

    @Override
    public void init() throws ServletException {
        super.init();
    }

    @Override
    public void destroy() {
        super.destroy();
    }

    private String excuteCmd(String type, String cwd, String args) {
        String result = "";
        try {
            IPath path = new Path(cwd).removeFirstSegments(1);
            IFileStore fStore = NewFileServlet.getFileStore(null, path);
            if (fStore == null) {
                result = "Error: This command must be used in an application folder\n";
                return result;
            }
            String cwdPath = fStore.toString();
            //Getting npm command path from the configuration file
            String npmPath = PreferenceHelper.getString("orion.npmPath");
            if (npmPath == null || npmPath.isEmpty()) {
                result = "Error: Npm path is not defined, contact the server administrator.\n";
                return result;
            }
            String cmd[];//The command passed to the process controller. E.g : "npmPath", "install", "express"
            if (args != null) {//If there is arguments, we should pass the args to the command
                cmd = new String[] { npmPath, type, args };//E.g. ["/data/node-v0.10.0-linux-x64/bin/npm", "install", "express"]
            } else {
                cmd = new String[] { npmPath, type };//E.g. ["/data/node-v0.10.0-linux-x64/bin/npm", "shrinkwrap"], ["/data/node-v0.10.0-linux-x64/bin/npm", "install"]
            }
            //The client side http request timeout is set to 60 seconds, so we set 55 seconds on the server side here.
            ProcessController pc = new ProcessController(295000L, cmd, new File(cwdPath));

            ByteArrayOutputStream outs = new ByteArrayOutputStream();
            ByteArrayOutputStream errs = new ByteArrayOutputStream();
            pc.forwardOutput(outs);
            pc.forwardErrorOutput(errs);
            pc.execute();
            String cmdOutPut = new String(outs.toByteArray(), "UTF-8");
            String cmdError = new String(errs.toByteArray(), "UTF-8");
            result = result + cmdError + cmdOutPut;
        } catch (Exception err) {
            return err.getMessage();
        }
        return result;
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        try {
            JSONObject o = OrionServlet.readJSONRequest(req);
            String type = o.getString("type");
            String cwd = o.getString("cwd");
            cwd = new URI(cwd).getPath();
            String args = null;
            if (type.equalsIgnoreCase("install")) {
                args = o.getString("package");
                if (args.equalsIgnoreCase("null")) {
                    args = null;
                }
            }
            String result = this.excuteCmd(type, cwd, args);

            resp.setStatus(HttpServletResponse.SC_OK);
            JSONObject jsonResult = new JSONObject();
            //The property "cmdOutput" is used as a single string to respond back to client.
            jsonResult.put("cmdOutput", result);
            OrionServlet.writeJSONResponse(req, resp, jsonResult);
        } catch (JSONException e) {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
        } catch (IOException e) {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
        } catch (URISyntaxException e) {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
        }
    }
}