org.experlog.lite
Class ESUploaderServlet

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by org.experlog.lite.ESUploaderServlet
All Implemented Interfaces:
java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class ESUploaderServlet
extends javax.servlet.http.HttpServlet

Works in conjunction with a browser's form-based file upload capability to allow the client to transfer a file (binary or ASCII) to the server and store it in the server's file system. It requires that the client web browser supports the form-based upload specification documented in RFC 1867, such as Netscape Navigator, MS Internet Explorer and Opera. Parameters: - urles: redirection URL (after upload) - uploaddirectory: directory where files should be upload (relative to app.UploadDir property) - uploadfile [ uploadfile2 ... uploadfileN ]: file(s) to upload - nbfiles: number of files to upload (default 1) - overwrite: on or off (default on, overwrite existing copies)

See Also:
Serialized Form

Constructor Summary
ESUploaderServlet()
           
 
Method Summary
 void doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)
           
 void doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)
           
protected  void doUpload(MultipartRequest mreq, javax.servlet.http.HttpServletResponse res)
          Reads the uploaded data from the request and writes it to a file.
 java.lang.String getServletInfo()
           
 void init(javax.servlet.ServletConfig cfg)
           
protected  void loadServletParams(MultipartRequest mreq, javax.servlet.http.HttpServletResponse res)
          Loads servlet parameters from incoming request required for uploading.
 
Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doHead, 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

ESUploaderServlet

public ESUploaderServlet()
Method Detail

init

public void init(javax.servlet.ServletConfig cfg)
          throws javax.servlet.ServletException
Specified by:
init in interface javax.servlet.Servlet
Overrides:
init in class javax.servlet.GenericServlet
Throws:
javax.servlet.ServletException

doGet

public void doGet(javax.servlet.http.HttpServletRequest req,
                  javax.servlet.http.HttpServletResponse res)
           throws javax.servlet.ServletException,
                  java.io.IOException
Overrides:
doGet in class javax.servlet.http.HttpServlet
Throws:
javax.servlet.ServletException
java.io.IOException

doPost

public void doPost(javax.servlet.http.HttpServletRequest req,
                   javax.servlet.http.HttpServletResponse res)
            throws javax.servlet.ServletException,
                   java.io.IOException
Overrides:
doPost in class javax.servlet.http.HttpServlet
Throws:
javax.servlet.ServletException
java.io.IOException

getServletInfo

public java.lang.String getServletInfo()
Specified by:
getServletInfo in interface javax.servlet.Servlet
Overrides:
getServletInfo in class javax.servlet.GenericServlet

loadServletParams

protected void loadServletParams(MultipartRequest mreq,
                                 javax.servlet.http.HttpServletResponse res)
                          throws javax.servlet.ServletException
Loads servlet parameters from incoming request required for uploading.

Parameters:
mreq - MultipartRequest containing data required for uploading client data
res - HttpServletResponse containing servlet (ie server) response to client
Throws:
javax.servlet.ServletException - if any of the required parameter missing/invalid. Required parameter/values:
  • content type should be multipart/form-data
  • name of file to be uploaded should contain a non-empty value

doUpload

protected void doUpload(MultipartRequest mreq,
                        javax.servlet.http.HttpServletResponse res)
                 throws javax.servlet.ServletException
Reads the uploaded data from the request and writes it to a file.

Parameters:
mreq - MultipartRequest containing client data to be uploaded
res - HttpServletResponse containing servlet (ie server) response to client
Throws:
javax.servlet.ServletException - if uploading fails (eg because file already exists and mOverwrite set to false)