Uploading file with Java: Java won't release the file.

Question

I'm trying to upload .log files to a webbsite using a form. It uploads fine, that's not the problem. The problem is that I want it to delete the file afterwards to save disk space, but the application doesn't release it. I thought I might just be doing something wrong with the delete function, but even deleting it manually through Windows doesn't work. Any ideas?
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.*;
public class ClientHttpRequest
    protected void connect()
        throws IOException
        if(os == null)
            os = connection.getOutputStream();
    protected void write(char c)
        throws IOException
        connect();
        os.write(c);
    protected void write(String s)
        throws IOException
        connect();
        os.write(s.getBytes());
    protected void newline()
        throws IOException
        connect();
        write("\r\n");
    protected void writeln(String s)
        throws IOException
        connect();
        write(s);
        newline();
    protected static String randomString()
        return Long.toString(random.nextLong(), 36);
    private final void boundary()
        throws IOException
        write("--");
        write(boundary);
    private final void postCookies()
        StringBuffer stringbuffer = new StringBuffer();
        for(Iterator iterator = cookies.entrySet().iterator(); iterator.hasNext();)
            java.util.Map.Entry entry = (java.util.Map.Entry)iterator.next();
            stringbuffer.append(entry.getKey().toString() + '=' + entry.getValue());
            if(iterator.hasNext())
                stringbuffer.append("; ");
        if(stringbuffer.length() > 0)
            connection.setRequestProperty("Cookie", stringbuffer.toString());
    public void setCookie(String s, String s1)
        throws IOException
        cookies.put(s, s1);
    public void setCookies(Map map)
        throws IOException
        if(map == null)
            return;
        } else
            cookies.putAll(map);
            return;
    public void setCookies(String as[])
        throws IOException
        if(as == null)
            return;
        for(int i = 0; i < as.length - 1; i += 2)
            setCookie(as, as[i + 1]);
private final void writeName(String s)
throws IOException
newline();
write("Content-Disposition: form-data; name=\"");
write(s);
write('"');
public void setParameter(String s, String s1)
throws IOException
boundary();
writeName(s);
newline();
newline();
writeln(s1);
private static final void pipe(InputStream inputstream, OutputStream outputstream)
throws IOException
byte abyte0[] = new byte[0x7a120];
int j = 0;
int i;
synchronized(inputstream)
while((i = inputstream.read(abyte0, 0, abyte0.length)) >= 0)
outputstream.write(abyte0, 0, i);
j += i;
outputstream.flush();
abyte0 = null;
public void setParameter(String s, String s1, InputStream inputstream)
throws IOException
boundary();
writeName(s);
write("; filename=\"");
write(s1);
write('"');
newline();
write("Content-Type: ");
URLConnection _tmp = connection;
String s2 = URLConnection.guessContentTypeFromName(s1);
if(s2 == null)
s2 = "application/octet-stream";
writeln(s2);
newline();
pipe(inputstream, os);
newline();
public void setParameter(String s, File file)
throws IOException
setParameter(s, file.getPath(), ((InputStream) (new FileInputStream(file))));
public void setParameter(String s, Object obj)
throws IOException
if(obj instanceof File)
setParameter(s, (File)obj);
else
setParameter(s, obj.toString());
public void setParameters(Map map)
throws IOException
if(map == null)
return;
java.util.Map.Entry entry;
for(Iterator iterator = map.entrySet().iterator(); iterator.hasNext(); setParameter(entry.getKey().toString(), entry.getValue()))
entry = (java.util.Map.Entry)iterator.next();
public void setParameters(Object aobj[])
throws IOException
if(aobj == null)
return;
for(int i = 0; i < aobj.length - 1; i += 2)
setParameter(aobj[i].toString(), aobj[i + 1]);
public InputStream post()
throws IOException
boundary();
writeln("--");
os.close();
return connection.getInputStream();
public InputStream post(Map map)
throws IOException
setParameters(map);
return post();
public InputStream post(Object aobj[])
throws IOException
setParameters(aobj);
return post();
public InputStream post(Map map, Map map1)
throws IOException
setCookies(map);
setParameters(map1);
return post();
public InputStream post(String as[], Object aobj[])
throws IOException
setCookies(as);
setParameters(aobj);
return post();
public InputStream post(String s, Object obj)
throws IOException
setParameter(s, obj);
return post();
public InputStream post(String s, Object obj, String s1, Object obj1)
throws IOException
setParameter(s, obj);
return post(s1, obj1);
public InputStream post(String s, Object obj, String s1, Object obj1, String s2, Object obj2)
throws IOException
setParameter(s, obj);
return post(s1, obj1, s2, obj2);
public InputStream post(String s, Object obj, String s1, Object obj1, String s2, Object obj2, String s3,
Object obj3)
throws IOException
setParameter(s, obj);
return post(s1, obj1, s2, obj2, s3, obj3);
private final void _mththis()
os = null;
cookies = new HashMap();
boundary = "---------------------------" + randomString() + randomString() + randomString();
public ClientHttpRequest(URLConnection urlconnection, String s)
throws IOException
_mththis();
connection = urlconnection;
urlconnection.setDoOutput(true);
urlconnection.setRequestProperty("User-Agent", s);
urlconnection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
public ClientHttpRequest(URL url, String s)
throws IOException
this(url.openConnection(), s);
public ClientHttpRequest(String s, String s1)
throws IOException
this(new URL(s), s1);
private static Random random = new Random();
URLConnection connection;
OutputStream os;
Map cookies;
String boundary;

Answer 1

And you're closing the inputstream to the file?Thanks, I knew it was something simple like that but I'd been staring at it so long I couldn't see it. I guess a fresh pair of eyes helps.