Save binary file from web
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class MainClass {
public static void main(String args[]) {
try {
URL root = new URL("http://");
saveBinaryFile(root);
} catch (MalformedURLException e) {
System.err.println("not URL I understand.");
}
}
public static void saveBinaryFile(URL u) {
int bufferLength = 128;
try {
URLConnection uc = u.openConnection();
String ct = uc.getContentType();
int contentLength = uc.getContentLength();
if (ct.startsWith("text/") || contentLength == -1) {
System.err.println("This is not a binary file.");
return;
}
InputStream stream = uc.getInputStream();
byte[] buffer = new byte[contentLength];
int bytesread = 0;
int offset = 0;
while (bytesread >= 0) {
bytesread = stream.read(buffer, offset, bufferLength);
if (bytesread == -1)
break;
offset += bytesread;
}
if (offset != contentLength) {
System.err.println("Error: Only read " + offset + " bytes");
System.err.println("Expected " + contentLength + " bytes");
}
String theFile = u.getFile();
theFile = theFile.substring(theFile.lastIndexOf('/') + 1);
FileOutputStream fout = new FileOutputStream(theFile);
fout.write(buffer);
} catch (Exception e) {
System.err.println(e);
}
return;
}
}
Related examples in the same category
