Hi all,
I need help with my servlets. I'm working on "email with attachment"
functionality. I use com.oreilly.servlet.MultipartRequest to upload the file
first in the server before attaching it to the mail. I use attach.jsp to allow
the user to keep adding attachment and message.jsp to send the mail thru
sendmail servlet. The first time I pass the session object holding the file
paths (in a vector) back to the calling jsp(attach.jsp) it works fine but the
second trip(like for example the user wants to attach another file, the session
object becomes null). I used both request objects(using RequestDispatcher) and
session objects(using Redirect) to pass the vector around but it doesn't seem to
help. Any help will be highly appreciated. Thanks.
Yuri
My code:
>>>message.jsp:
HttpSession session1 = request.getSession();
Vector toVtr = new Vector();
toVtr.addElement("[EMAIL PROTECTED]");
session1.setAttribute("toVtr", toVtr);
...................
Vector filenames = (Vector)session1.getAttribute("filenames");
if (filenames==null){
System.out.println("Message:session filenames="+filenames);
filenames = new Vector();
}else System.out.println("Message:session filenames="+filenames);
...........................
<input type=button name='attach' value='Attach/Detach File..'
onclick="window.location='Attach.jsp'" >
<INPUT type=submit value='Send'> <INPUT type=reset value='Cancel'>
>>>>>>>>>>attach.jsp
<form name=attach id=attach action="<%= request.getContextPath() +
"/servlet/Attach" %>"
ENCTYPE="MULTIPART/FORM-DATA" method=post>
<b>Select file to attach:</b> <input type=file name='filename' size=30
><br>
<%
HttpSession session1 = request.getSession();
Vector filenames = (Vector)session1.getAttribute("filenames");
if (filenames==null){
System.out.println("Attach:session filenames="+filenames);
filenames = new Vector();
} else System.out.println("Attach:session filenames="+filenames);
...................................................
<INPUT type=submit name='button' value='Attach'>
<INPUT type=submit name='button' value='Detach'>
<INPUT type=submit name='button' value='Done'>
>>>>>>>>>>>attach servlet
HttpSession session = request.getSession();
String button = request.getParameter("button");
Vector filenames = (Vector)session.getAttribute("filenames");
if (filenames==null){
System.out.println("Attach servlet:session filenames="+filenames);
filenames = new Vector();
}else System.out.println("Attach servlet:session filenames="+filenames);
System.out.println("Button clicked="+button);
if (button.equalsIgnoreCase("Attach")) {
String path = "";
//upload file to server
MultipartRequest mr = new
MultipartRequest(request,"C:\\testmailattach\\");
Enumeration params = mr.getParameterNames();
while (params.hasMoreElements()) {
String name = (String)params.nextElement();
String value = mr.getParameter(name);
System.out.println(name + " = " + value);
}
System.out.println("Files:");
Enumeration files = mr.getFileNames();
while (files.hasMoreElements()) {
String name = (String)files.nextElement();
String filename = mr.getFilesystemName(name);
String type = mr.getContentType(name);
File f = mr.getFile(name);
System.out.println("name:"+name);
System.out.println("filename:"+filename);
System.out.println("type:"+type);
if (f!=null){
System.out.println("length:"+f.length());
path = f.getAbsolutePath();
System.out.println("path:"+f.getAbsolutePath());
/* boolean deleted = false;
deleted = f.delete();
if (deleted){ System.out.println("file deleted");}
else { System.out.println("file not deleted.pls remove
manually.");}*/
}
}
//check if selected file is already attached..
boolean attached = false;
if ((filenames!=null)&&(filenames.size()>0)){
for(int i=0;i<filenames.size();i++){
if (path.equals(filenames.elementAt(i))){
String afile = (String)filenames.elementAt(i);
System.out.println("vector file:"+afile);
System.out.println("file selected:"+path);
attached = true;
break;
}
}
}
if (attached==false){
filenames.addElement(path);
}
session.setAttribute("filenames",filenames);
response.sendRedirect("/NASApp/javamail/Attach.jsp");
}else if (button.equalsIgnoreCase("Detach")) {
session.setAttribute("filenames",null);
response.sendRedirect("/NASApp/javamail/Attach.jsp");
}else if (button.equalsIgnoreCase("Done")) {
System.out.println("size="+filenames.size());
session.setAttribute("filenames",filenames);
response.sendRedirect("/NASApp/javamail/Message.jsp");
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