public static void readURL(String urlString, int bufferSize) throws IOException {
System.out.println("start=" + new Date());
long start = System.currentTimeMillis();
URL url;
java.io.InputStream is = null;
try {
url = new URL(urlString);
} catch (MalformedURLException e) {
throw new IOException(
"** MalformedURLException on URL <" + urlString + ">\n" + e.getMessage() + "\n");
}
try {
java.net.HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
// check response code is good
int responseCode = httpConnection.getResponseCode();
System.out.println(" response code= " + responseCode);
if (responseCode / 100 != 2)
throw new IOException(
"** Cant open URL <"
+ urlString
+ ">\n Response code = "
+ responseCode
+ "\n"
+ httpConnection.getResponseMessage()
+ "\n");
// read it
is = httpConnection.getInputStream();
int nreads = 0;
long totalB = 0;
long total = 0;
byte[] buffer = new byte[bufferSize];
while (true) {
int bytesRead = is.read(buffer);
if (bytesRead == -1) break;
totalB += bytesRead;
total += buffer[0]; // prevent compiler optimization
nreads++;
}
double took = .001 * (System.currentTimeMillis() - start);
double rate = totalB / took / (1000 * 1000);
double avg = totalB / nreads;
System.out.println(
" readURL ("
+ bufferSize
+ ") took = "
+ took
+ " sec; rate = "
+ rate
+ "Mb/sec avg read= "
+ avg);
System.out.println(" dummy=" + total);
System.out.println(" end=" + new Date());
} catch (java.net.ConnectException e) {
throw new IOException(
"** ConnectException on URL: <"
+ urlString
+ ">\n"
+ e.getMessage()
+ "\nServer probably not running");
} finally {
if (is != null) is.close();
}
}
