I am trying to read a HTTP uploaded file using FilePostParser and
PostFileInputStream.
I can read the file byte by byte, but if I try to read it in chunks I get an
AIOB exception. Here's my code with a comment on the line that blows up.
More commentary below.
---------
Hashtable params = new Hashtable();
Enumeration enumeration = new FilePostParser(req.getInputStream(),
req.getContentLength());
while(enumeration.hasMoreElements()) {
Object element = enumeration.nextElement();
if(element instanceof Map.Entry) {
Map.Entry entry = (Map.Entry) element;
params.put(entry.getKey(), entry.getValue());
}
else if(element instanceof InputStream) {
PostFileInputStream in = (PostFileInputStream) element;
int len;
byte[] b = new byte[1024];
// PROBLEM: read throws an exception
while ((len = in.read(b)) != -1) {
out.write(b, 0, len);
}
out.close();
}
}
-----------
Now, according to the api docs, a InputStream.read(byte[]) should read in as
many bytes
as available and return the number of bytes read, or -1 if the stream is at
the end.
This is espescially confusing because if I read the file byte by byte, such
as:
while ((len = in.read()) != -1) {
out.write(len);
}
It works just fine. Here is the exception I am getting.
---------
9/27/00 3:19 PM default: Servlet error
java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at com.evermind.io.PostFileInputStream.read(JAX)
at java.io.InputStream.read(InputStream.java:91)
at org.ancienttruth.servlets.UploadImage.doPost(UploadImage.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at com.evermind.server.http.d1.si(JAX)
at com.evermind.server.http.d1.forward(JAX)
at com.evermind.server.http.ed.sp(JAX)
at com.evermind.server.http.ed.so(JAX)
at com.evermind.util.f.run(JAX)
----------
I am guessing this is a bug in the implementation, but I just wanted to ask
if there was
anything I am missing first. Thanks!
------
Jason von Nieda
3Buddies.com
