I would suggest you try the file upload debugging suggestions at
http://www.servlets.com/cos/faq.html. Pls let us know what you figure
out.
-jh-
Gardner Monte wrote:
>
> Hello,
> I am using Jason Hunters MultiPartParser to allow users
> to upload image files to an on-line Scrapbook.
> Because each user has his own directory to place pictures in,
> the directory to save the picture in is specified in the
> form inputs. Specifically, I have a form with these input
> parameters in this order
>
> requesttype -- a hidden input field
> category -- indicates which directory to save the file in
> password -- Each user has a password
> title -- title of the picture
> caption -- a caption for the picture
> file -- the actual file input
>
> I use a while loop to read and analyze each part:
> -- if the part is a parameter part
> save the value in the appropriate variable
> -- if the part is a file part
> read the file into an array of bytes
> -- read the next part and continue the loop untill they are
> all read
>
> here is the while loop code (part of my doGet() method)
>
> MultipartParser mp = new MultipartParser(request, 1024*1024); // 100K???
>
> while ( (part = mp.readNextPart()) != null)
> {
> if (part.isParam())
> {
> ParamPart paramPart = (ParamPart) part;
> String value = paramPart.getStringValue();
> String name = paramPart.getName();
> if (verbose)
> {
> out.println("Parameter " + name + "=" + value +"\n");
> }
> //map form input values to appropriate variables
> if (name.equals("requesttype"))
> requestType = value;
> else if (name.equals("category") )
> category = value.toLowerCase();
> else if (name.equals("caption"))
> caption = value;
> else if (name.equals("title"))
> title = value;
> else if (name.equals("index"))
> index = Integer.parseInt(value);
> else if (name.equals("password"))
> password = value;
> }//end if
> else if (part.isFile())
> {
> /**
> * The file data must be read in here before reading
> * the next part or it will be lost. See
> * documentation for FilePart.getInputStream()
> *
> */
> FilePart filePart = (FilePart) part;
> if (verbose) out.println("Reading file: ");
> InputStream inStream = filePart.getInputStream();
> length = inStream.read(fileData);
> if (verbose)
> {
>
> out.println("File Name: " + filePart.getFileName());
> out.println("Bytes read into Program: " + length);
> out.println("Max Bytes: " + maxBytes);
> out.println("Content Type: " +
> filePart.getContentType() + "\n");
> }
> fileName = filePart.getFileName();
> //check the content type:Gifs/Jpgs only
> String content = filePart.getContentType();
> if (!content.equals("image/jpeg") &&
> !content.equals("image/gif") &&
> !content.equals("image/pjpeg"))
> throw new DataFormatException
> ("Files of type " + content + " are not
> allowed.");
>
> //check the size
> if (length > maxBytes)
> throw new DataFormatException
> ("The file " + fileName + " has a size of " +
> length +
> ". The maximum file Size is " + maxBytes);
>
> }//end else
> part = mp.readNextPart();
> }//end while
>
> When I run this servlet from a web Browser, I get the following output
> (note that it seems to be trying to read a filePart twice, even though
> there is only one file Input in the form)
>
> Reading file:
> File Name: cheryse1.gif
> Bytes read into Program: 7618
> Max Bytes: 20000
> Content Type: image/gif
>
> Parameter password=admin
>
> Parameter caption=caption
>
> Parameter category=cheryse
>
> Parameter title=title
>
> Reading file:
> java.io.IOException: unexpected end of part
> at PartInputStream.fill(PartInputStream.java:87)
> at PartInputStream.read(PartInputStream.java:153)
> at java.io.FilterInputStream.read(FilterInputStream.java:97)
> at ScrapBookServlet.doPost(ScrapBookServlet.java:131)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java)
> at
> org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:497)
> at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
> at org.apache.tomcat.core.Handler.service(Handler.java:235)
> at
> org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:448)
> at
> org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:918)
> at
> org.apache.tomcat.core.ContextManager.service(ContextManager.java:831)
> at
>
>org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Ajp13Interceptor.java:167)
> at
> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:478)
> at
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:517)
> at java.lang.Thread.run(Thread.java:479)
>
> The exception occurs on the code
> length = inStream.read(fileData);
>
> What causes a a MultiPartParser to throw a "unexpected end of part"??, and how
> can I avoid it?
>
> --Monte Glenn Gardner
>
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