pnuts.servlet
Class PnutsServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--pnuts.servlet.PnutsServlet
All Implemented Interfaces:
java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class PnutsServlet
extends javax.servlet.http.HttpServlet

Servlet for Pnuts scripting

 Initparams:
   'module'   the module to be use()'d
   'compile'  scripts are compiled if true
   'includeLineNo'  tells the compiler to generate line number info
 

See Also:
Serialized Form

Constructor Summary
PnutsServlet()
           
 
Method Summary
protected  void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          Called by the server (via the service method) to allow a servlet to handle a GET request.
protected  void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          Called by the server (via the service method) to allow a servlet to handle a POST request.
 java.lang.String getServletInfo()
          Returns information about the servlet, such as author, version, and copyright.
 void init()
          A convenience method which can be overridden so that there's no need to call super.init(config).
 
Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doOptions, doPut, doTrace, getLastModified, service, service
 
Methods inherited from class javax.servlet.GenericServlet
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletName, init, log, log
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PnutsServlet

public PnutsServlet()
Method Detail

init

public void init()
          throws javax.servlet.ServletException
Description copied from class: javax.servlet.GenericServlet
A convenience method which can be overridden so that there's no need to call super.init(config).

Instead of overriding GenericServlet.init(ServletConfig), simply override this method and it will be called by GenericServlet.init(ServletConfig config). The ServletConfig object can still be retrieved via GenericServlet.getServletConfig().

Overrides:
init in class javax.servlet.GenericServlet
Following copied from class: javax.servlet.GenericServlet
Throws:
javax.servlet.ServletException - if an exception occurs that interrupts the servlet's normal operation

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws javax.servlet.ServletException,
                     java.io.IOException
Description copied from class: javax.servlet.http.HttpServlet
Called by the server (via the service method) to allow a servlet to handle a GET request.

Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a GET request that returns no body in the response, only the request header fields.

When overriding this method, read the request data, write the response headers, get the response's writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a PrintWriter object to return the response, set the content type before accessing the PrintWriter object.

The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.

Where possible, set the Content-Length header (with the ServletResponse.setContentLength(int) method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.

The GET method should be safe, that is, without any side effects for which users are held responsible. For example, most form queries have no side effects. If a client request is intended to change stored data, the request should use some other HTTP method.

The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online or modifying data is neither safe nor idempotent.

If the request is incorrectly formatted, doGet returns an HTTP "Bad Request" message.

Overrides:
doGet in class javax.servlet.http.HttpServlet
Following copied from class: javax.servlet.http.HttpServlet
Parameters:
req - an HttpServletRequest object that contains the request the client has made of the servlet
resp - an HttpServletResponse object that contains the response the servlet sends to the client
Throws:
java.io.IOException - if an input or output error is detected when the servlet handles the GET request
javax.servlet.ServletException - if the request for the GET could not be handled
See Also:
ServletResponse.setContentType(java.lang.String)

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws javax.servlet.ServletException,
                      java.io.IOException
Description copied from class: javax.servlet.http.HttpServlet
Called by the server (via the service method) to allow a servlet to handle a POST request. The HTTP POST method allows the client to send data of unlimited length to the Web server a single time and is useful when posting information such as credit card numbers.

When overriding this method, read the request data, write the response headers, get the response's writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a PrintWriter object to return the response, set the content type before accessing the PrintWriter object.

The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.

Where possible, set the Content-Length header (with the ServletResponse.setContentLength(int) method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.

When using HTTP 1.1 chunked encoding (which means that the response has a Transfer-Encoding header), do not set the Content-Length header.

This method does not need to be either safe or idempotent. Operations requested through POST can have side effects for which the user can be held accountable, for example, updating stored data or buying items online.

If the HTTP POST request is incorrectly formatted, doPost returns an HTTP "Bad Request" message.

Overrides:
doPost in class javax.servlet.http.HttpServlet
Following copied from class: javax.servlet.http.HttpServlet
Parameters:
req - an HttpServletRequest object that contains the request the client has made of the servlet
resp - an HttpServletResponse object that contains the response the servlet sends to the client
Throws:
java.io.IOException - if an input or output error is detected when the servlet handles the request
javax.servlet.ServletException - if the request for the POST could not be handled
See Also:
ServletOutputStream, ServletResponse.setContentType(java.lang.String)

getServletInfo

public java.lang.String getServletInfo()
Description copied from class: javax.servlet.GenericServlet
Returns information about the servlet, such as author, version, and copyright. By default, this method returns an empty string. Override this method to have it return a meaningful value. See Servlet.getServletInfo().
Overrides:
getServletInfo in class javax.servlet.GenericServlet
Following copied from class: javax.servlet.GenericServlet
Returns:
String information about this servlet, by default an empty string