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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 7747] New: - File Upload Causes Tomcat-Apache to Block
Date Thu, 04 Apr 2002 18:01:55 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=7747

File Upload Causes Tomcat-Apache to Block

           Summary: File Upload Causes Tomcat-Apache to Block
           Product: Tomcat 4
           Version: Nightly Build
          Platform: All
        OS/Version: Other
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Connector:JK/AJP
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: andy.dowling@framework.ie


Hi folks,

I've got the nightly build of apache-tomcat, running as a standalone server and 
with the Apache Server (via AJP13).

File uploads are OK with the standalone server, but with AJP13, the first call
to read() on the HttpServletRequest's associated Reader object 
(i.e. in order to get the file upload info) will cause the servlet to block.

Note 1: this problem can be replicated on Tomcat 4.0.4 beta 2
Note 2: I couldn't replicate this problem with Tomcat 3.2.1.

Sample code is attached.

Any help would be appreciated!

Cheers,

Andy

--------BEGIN HTML FILE-------
<html>
  <head>
   <title>Upload File</title>
  </head>
  <body vlink="red" alink="green" link="blue" bgcolor="white">
    <p>Select the file you wish to upload using the "browse" button below, and 
click Go!</p>

    <form method="POST" enctype="multipart/form-data" 
          action="http://my_server.com/servlet/ExampleFileUpload">
      <center>
        <input type="FILE" name="upload"/><br/>
        <input type="SUBMIT" value="Go!"/><br/>
      </center>
    </form>
</html>
--------END HTML FILE--------

--------BEGIN SERVLET SOURCE-------
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class ExampleFileUpload extends HttpServlet
{
   public void doPost (HttpServletRequest  request,
                       HttpServletResponse response) throws IOException,
                                                             ServletException
   {
      if (!request.getContentType().startsWith("multipart/form-data")) 
         throw new ServletException ("Expecting multipart/form-data");

      //
      // Now let's read the file upload
      //
      BufferedReader in = new BufferedReader(request.getReader());

      //---------------------
      //- START HERE!
      //---------------------
      System.err.println ("About to make the first call to readLine()...");
      String boundary = in.readLine();
      System.err.println ("Got the MIME boundary line: |" + boundary + "|");
      //---------------------
      //- END HERE!
      //---------------------

      //
      // Any remaining code won't execute due to the blocking call...
      //
   }
 }
--------END SERVLET SOURCE--------

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