Java + HTTP question

Question

I have the following test, see code below.
I'm trying to write a test client which connects to a URL, asks for a certatin byte range, write the bytes to a file, within the same connection make another request for some more bytes and write it to a file.
Problem is I get the following exception(See Below),.
Any ideas?
Already connected
java.lang.IllegalStateException: Already connected
at java.net.URLConnection.setDoOutput(URLConnection.java:739)
at com.bitfone.server.ClientDeviceTest.testByteChunked(ClientDeviceTest.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
public void testByteChunked() {
HttpURLConnection connection = null;
try {
               URL firstUrl = new URL(upURL);
               connection = (HttpURLConnection)firstUrl.openConnection();
               connection.setRequestMethod("GET");
               connection.setDoInput(true);
               connection.setRequestProperty("Range", "bytes=100-200");
               connection.setRequestProperty("Connection", "keep-alive");
               connection.connect();
               InputStream is = new BufferedInputStream(connection.getInputStream());
               InputStreamReader input = new InputStreamReader(is);
               BufferedReader inStrm = new BufferedReader(input);
               String inputLine;
               FileWriter fw = new FileWriter(filename3);
               while ((inputLine = inStrm.readLine()) != null) {
                    fw.write(inputLine);
               connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Range", "bytes=301-300");
               inStrm.close();
               input.close();
               is.close();
               fw.flush();
               fw.close();
               connection.disconnect();
               logger.debug("~~ Leaving testByteChunked ~~");
} catch (MalformedURLException mue) {
logger.error(" MalformedURLException " + mue.getMessage());
               fail("A MalformedURLException occured, please make sure the URL is valid.");
} catch (ProtocolException pe) {
               logger.error(" ProtocolException " + pe.getMessage());
               fail("A ProtocolException occured, please make sure the method, (e.g POST), is valid.");
     } catch (IOException ioe) {
          logger.error(" IOException " + ioe.getMessage());
               fail("An IOException occured.");
}

Answer 1

Like this?
public void testByteRange() {
logger.debug("~~ Entering testByteRange ~~");
HttpURLConnection connection = null;
     HttpURLConnection reconnection = null;
try {
               URL firstUrl = new URL(upURL);
               connection = (HttpURLConnection)firstUrl.openConnection();
               connection.setRequestMethod("GET");
               connection.setDoInput(true);
               connection.setRequestProperty("Range", "bytes=1-10");
               connection.setRequestProperty("Connection", "keep-alive");
               connection.connect();
               InputStream is = new BufferedInputStream(connection.getInputStream());
               InputStreamReader input = new InputStreamReader(is);
               BufferedReader inStrm = new BufferedReader(input);
               String inputLine;
               FileWriter fw = new FileWriter(filename);
               while ((inputLine = inStrm.readLine()) != null) {
                    fw.write(inputLine);
               inStrm.close();
               input.close();
               is.close();
               fw.flush();
               fw.close();
               connection.disconnect();
               URL secondUrl = new URL(upURL);
               reconnection = (HttpURLConnection)secondUrl.openConnection();
               reconnection.setRequestMethod("GET");
               reconnection.setDoInput(true);
               reconnection.setRequestProperty("Range", "bytes=11-20");
               reconnection.setRequestProperty("Connection", "keep-alive");
               reconnection.connect();
               InputStream is1 = new BufferedInputStream(reconnection.getInputStream());
               InputStreamReader input1 = new InputStreamReader(is1);
               BufferedReader inStrm1 = new BufferedReader(input1);
               String inputLine1;
               FileWriter fw1 = new FileWriter(filename2);
               while ((inputLine1 = inStrm1.readLine()) != null) {
                    fw1.write(inputLine1);
               inStrm1.close();
               input1.close();
               is1.close();
               fw1.flush();
               fw1.close();
               reconnection.disconnect();
               logger.debug("~~ Leaving testByteRange ~~");
} catch (MalformedURLException mue) {
logger.error(" MalformedURLException " + mue.getMessage());
               fail("A MalformedURLException occured, please make sure the URL is valid.");
} catch (ProtocolException pe) {
               logger.error(" ProtocolException " + pe.getMessage());
               fail("A ProtocolException occured, please make sure the method, (e.g POST), is valid.");
     } catch (IOException ioe) {
          logger.error(" IOException " + ioe.getMessage());
               fail("An IOException occured.");
}