com.yworks.yfiles.server.graphml.servlets
Class DownloadServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.yworks.yfiles.server.graphml.servlets.DownloadServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class DownloadServlet

extends javax.servlet.http.HttpServlet

Simple download servlet that takes the request from a client and creates a file download for it.

See Also:

Serialized Form

Constructor Summary

DownloadServlet()
Calls the DownloadServlet(String) constructor using AbstractGraphRoundtripSupport.PARAM_GRAPH as the parameter name.

DownloadServlet(String graphParameter)
Creates a new instance using the provided parameter to get the graphml string from the HttpServletRequest later in getGraphInputStream(javax.servlet.http.HttpServletRequest) from.

Method Summary

protected void	doGet(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse)
protected void	doPost(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse)
protected String	getContentType() Get the content type that will be used for the response header.
protected InputStream	getGraphInputStream(javax.servlet.http.HttpServletRequest httpServletRequest) Retrieves the input stream from the request to read the graphml from.

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, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DownloadServlet

public DownloadServlet()

Calls the DownloadServlet(String) constructor using AbstractGraphRoundtripSupport.PARAM_GRAPH as the parameter name.

DownloadServlet

public DownloadServlet(String graphParameter)

Creates a new instance using the provided parameter to get the graphml string from the HttpServletRequest later in getGraphInputStream(javax.servlet.http.HttpServletRequest) from.

Parameters:

graphParameter - the name of the parameter of null if the ServletInputStream shall be used.

Method Detail

doGet

protected void doGet(javax.servlet.http.HttpServletRequest httpServletRequest,
                     javax.servlet.http.HttpServletResponse httpServletResponse)
              throws IOException

Throws:

IOException

getContentType

protected String getContentType()

Get the content type that will be used for the response header.

Depending on the servlet container configuration, the response content type might determine whether the servlet container sends a compressed response.

Returns:

A conten MIME type. This implementation returns "text/xml".

getGraphInputStream

protected InputStream getGraphInputStream(javax.servlet.http.HttpServletRequest httpServletRequest)
                                   throws IOException

Retrieves the input stream from the request to read the graphml from. This implementation uses the ServletRequest.getParameter(String) method using the parameter name specified in the constructor. If no parameter name has been specified the ServletInputStream is returned.

Parameters:

httpServletRequest - the request

Returns:

the stream to read the graph from.

Throws:

IOException - if something bad happened.

doPost

protected void doPost(javax.servlet.http.HttpServletRequest httpServletRequest,
                      javax.servlet.http.HttpServletResponse httpServletResponse)
               throws javax.servlet.ServletException,
                      IOException

Throws:

javax.servlet.ServletException

IOException