Who cares?: Servlets in .net?

Wednesday, February 21, 2007

Servlets in .net?

Today I am writing a website using .net 2.0, and one of the pages needs to return a .pdf rather than HTML. So the return back needs to not output the normal html headers and content. But in ASPX, every webpage must contain at least this:

<html><body/></html>

But once that is emitted into the stream, I am not outputting a .pdf any more. So I needed to subvert the streaming of that content.

Here's what I did:

<%@ Page Language="C#" AutoEventWireup="true" 
    CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<% if (true)
   {
     Emit_Content();
   }
   else
   { %>
    <html><body/></html>
<% } %>

Once the html tags were subverted, I was able to write the Emit_Content() function in Default2.aspx.cs. Note that byte array _buff and Int32 _got are member variables.

    /*
     * Write out the contents of the 
     * pdf to the http response socket
     */
    protected void Emit_Content()
    {
        try
        {
            Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", 
                "inline;filename=new.pdf");

            Response.BinaryWrite(_buff, _got));
        }
        catch (Exception ex)
        {
            Response.Write("<html><body>" + 
                ex.Message + "</body></html>");
        }
    }

Wednesday, February 21, 2007

Servlets in .net?

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