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Status.java
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Status.java
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/*
* Copyright (C) 2016-2017 Virgo Venture, Inc.
* Copyright (C) 2013-2014 Lannocc Technologies
* @%@~LICENSE~@%@
*/
package win.iovar.web.bin.shell;
// local imports:
import win.iovar.web.*;
import win.iovar.web.dev.*;
// java imports:
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
// 3rd-party imports:
/**
* Return HTTP status code and optional message.
*
* @author shawn@lannocc.com
*
* @see Exit
*/
public class Status extends HttpServlet
{
protected void doHead (final HttpServletRequest req, final HttpServletResponse resp) throws IOException
{
Utils.doHead (this, req, resp);
}
protected void doGet (final HttpServletRequest req, final HttpServletResponse resp) throws IOException
{
Utils.doGet (this, req, resp);
}
protected void doPut (final HttpServletRequest req, final HttpServletResponse resp) throws IOException
{
Utils.doPut (this, req, resp);
}
public void usage (final HttpServletResponse resp) throws IOException
{
Log.debug ("displaying usage");
resp.setContentType ("text/plain");
final PrintWriter out = resp.getWriter ();
out.println ("usage: status <http-code> [<message>]");
out.println ();
out.println ("Sets HTTP status to the specified response code and optional message.");
out.println ();
out.println ("Options:");
out.println (" ?help - display this help screen");
}
/**
* Execute. Anonymous parameters expected:
* arg[0]: HTTP status code
* arg[1]: (optional) message
*/
protected void doPost (final HttpServletRequest req, final HttpServletResponse resp) throws IOException
{
final ServletContext context = getServletContext ();
final String query = req.getQueryString ();
final Map<String,List<String>> params = Utils.getParams (query);
if (params.containsKey ("help"))
{
usage (resp);
Shell.exit (req, context, 0);
return;
}
final List<String> vals = params.get (null);
if (vals==null || vals.size ()<1 || vals.size ()>2)
{
usage (resp);
Shell.exit (req, context, 1);
return;
}
try
{
final int status = Integer.parseInt (vals.get (0));
if (status < 0) set (resp, resp.SC_BAD_REQUEST, "not a valid http status code: "+status); // FIXME: throw IllegalArgumentException instead (to differentiate status here vs status passed in)
else set (resp, status, vals.size ()>1 ? vals.get (1) : null);
}
catch (final NumberFormatException e)
{
set (resp, resp.SC_BAD_REQUEST, "not a number: "+vals.get (0));
}
}
public static void set (final HttpServletResponse resp, final int status) throws IOException
{
set (resp, status, null);
}
public static void set (final HttpServletResponse resp, final int status, final String message) throws IOException
{
Log.debug ("returning status: "+status+" - "+message);
resp.setStatus (status);
//resp.getWriter ().println (status);
if (message!=null) resp.getWriter ().println (message);
}
}

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Status.java (3 KB)

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