How to add a hyperlink to javamail attachment?

Question

Hi friends:
I am writing a mail systems.I can receive email attachment using javamail API. But I don't know how to add a hyperlink to the attachment so when user click the hyperlink the file will be download to disc.
I means that I want to add a hyperlink to the attachment,the hyperlink will get the file's path in mail server.Because the mail's attachment are stored in mail server so I don't know how to get it in my servlet.
what I can do is get a inputstream using messagePart.getInputStream();. I only can get a inputstream in servlet.Ｈｏｗ to change the inputstream to a File when user click it and download it?
Help!
Thks

Answer 1

I am making a same application now...
You have 2 possibilities:
1. Save all the data from the stream to a file That is accessible from the outside through HTTP and then put a link to it
2. Make a link to a seperate JSP page with the following parameters: Folder name (describing where the desired message is), Message id (the number of the message inside the folder) and Part number (you will have to count it yourself). The JSP page then returns all the data.
If you do the second thing, you will have to take care that the first line in the jsp starts with <% because if it does not, the JSP will send an \r\n and that will modify the data.
You will also have to do the following:
response.setHeader("Content-Disposition", "attachment; filename=myfile.txt");
response.setContentType("application/octet-stream; name=myfile.txt");If you know the MIME type, replace application/octet-stream with the MIME type.
Michael