hi there...
i am trying to download a certain file...
the problem...
The link id "download_file" in the application_map is the reference used in
the href statements in download_test.jsp, which in
turn calls the DownloadResponseHandler. (java class)
The problem is when the link is executed, the "Save As" dialog has the
default file name "download_file.html" displayed.
What I require is that this default file name be displayed as the FileName
value in the href, i.e. "myTextFile.txt".
following are the relevant code snippets...
Application_map:
==================================================================
application_map.xml
<response id= "download_resp"
handler="com.sdrc._wae.ctrl.DownloadResponseHandler"/>
<link id="download_file" response="download_resp"/>
==================================================================
JSP File:
<html>
<head>
<title>MWAS Download File</title>
</head>
<h1><font color="blue"> <b>Metaphase Download Files</b> </font></h1>
<body bgcolor="lightgrey">
<form name="download_form" method="post" action="download_items">
<table border=0 cellpadding=2 cellspacing=8>
<tr><td align=right>
<a
href="download_file?FileName=myTextFile.txt&EntityHandle=MTIObjectHandle-0001-1;ledsf6garh---rc4adminabd;EditText;rc4admin;;">myTextFile.txt</a>
<input type="button" value="Download"></td>
<tr><td align=right>
<a
href="download_file?FileName=myTextFile1.txt&EntityHandle=MTIObjectHandle-0001-1;leepA4harh---rc4adminabw;EditText;rc4admin;;">myTextFile1.txt</a>
<input type="button" value="Download"></td>
</table>
</form>
</body>
Java Class:
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletOutputStream;
import java.util.Enumeration;
import java.io.IOException;
import com.sdrc.metaphase.enterprise.es.base.EnterpriseException;
import com.sdrc.metaphase.enterprise.es.base.EntityHandle;
import com.sdrc.metaphase.enterprise.es.base.Manager;
import com.sdrc.metaphase.enterprise.es.omf.vault.DownloadableFile;
import com.sdrc.metaphase.enterprise.es.omf.vault.Vaulter;
import com.sdrc.metaphase.enterprise.es.session.Session;
import com.sdrc.metaphase.enterprise.es.session.SessionAuthenticator;
import com.sdrc.metaphase.wae.CredentialsStore;
import com.sdrc.wae.ResponseHandlerSupport;
import com.sdrc.wae.RequestContext;
import com.sdrc.wae.util.RequestParamReader;
/**
* Download ResponseHandler .
* <p>
* <p>
*
*/
public class DownloadResponseHandler
extends ResponseHandlerSupport
{
/**
* Called to generate the HTTP response.
* <p>
* @param request The HTTP request
* @param response The HTTP response to use for generating output.
* @param context Context for request, session, and Web application.
*/
public void generateResponse(HttpServletRequest request,
HttpServletResponse response,
RequestContext context)
{
try
{
String entity_handle_name = null;
String file_name = null;
RequestParamReader params = context.getRequestParameters();
if (params != null)
{
for (Enumeration e = params.getParameterNames() ;
e.hasMoreElements() ;)
{
String name = (String) e.nextElement();
if (name.equals( "EntityHandle" ))
{
entity_handle_name = params.getParameter(name);
}
else if (name.equals( "FileName" ))
{
file_name = params.getParameter(name);
}
}
}
// ContentType forces the Save As dialog for all file types.
response.setContentType("application/octet-stream");
response.setLocale(context.getUserLocale());
try
{
ServletOutputStream pw = response.getOutputStream();
Manager a_manager = new
com.sdrc._metaphase.enterprise.es_evista.base.Manager();
SessionAuthenticator authenticator =
a_manager.getSessionAuthenticator();
Session es_session =
authenticator.establishSession(
CredentialsStore.getUserCredentials(context));
Vaulter vaulter_new =
(Vaulter)a_manager.getProcessor("omf.vault.Vaulter", es_session);
EntityHandle entity_handle =
vaulter_new.getEntityHandleByName(entity_handle_name);
DownloadableFile downloadable =
vaulter_new.constructDownloadable(entity_handle);
vaulter_new.downloadToStream( downloadable, pw );
}
catch (EnterpriseException e)
{
System.out.println("Error 1: DownloadResponseHandler "+e);
e.printStackTrace();
}
}
catch (IOException e)
{
System.out.println("Error 2: DownloadResponseHandler");
e.printStackTrace();
}
}
}
any ideas...
thanx in advance
abhi
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