using Java to download file

Question

I am trying to download a file from this url, but the code hang at getInputStream(); I type this url in the browser. the url is accessible http://filehost.blob.core.windows.net/firmware/version.txt

What is the cause of it ?

URL url = new URL("http://filehost.blob.core.windows.net/firmware/version.txt");
HttpURLConnection  urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();

InputStream inputStream = urlConnection.getInputStream();  //hang at this line

int totalSize = urlConnection.getContentLength();

Answer 1

READING THE FILE CONTENT

SOLUTION
Use URL with Scanner .

CODE

URL url = new URL("http://filehost.blob.core.windows.net/firmware/version.txt");
Scanner s = new Scanner(url.openStream());
while (s.hasNextLine())
    System.out.println(s.nextLine());
s.close();

OUTPUT

1.016

NOTE
MalformedURLException and IOException must be thrown or handled.

DOWNLOADING THE FILE

SOLUTION
Use JAVA NIO .

CODE

URL website = new URL("http://filehost.blob.core.windows.net/firmware/version.txt");
ReadableByteChannel rbc = Channels.newChannel(website.openStream());
FileOutputStream fos = new FileOutputStream("C:/temp/version.txt");
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
fos.close();

OUTPUT
file has been created at c:\\test\\version.txt with 5 bytes size

NOTE
MalformedURLException , FileNotFoundException and IOException must be thrown or handled.

Answer 2

I tried your code snippet and could not reproduce your problem - it does not hang for me. I think that your network (configuration) may have some problems and that your code hangs until some timeout occurs.