public static void main(String args[]) throws Exception {
int nconstraints = DFALTNCONSTRAINTS;
if (args.length > 0) {
try {
int n = Integer.parseInt(args[0]);
if (n > 0) nconstraints = n;
} catch (NumberFormatException nfe) {
System.err.println("GenerateConstraints: non-int argument");
}
}
try {
new GenerateConstraints("GenerateConstraints").generate(nconstraints);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Open a connection to the DODS server.
*
* @param urlString the URL to open.
* @param command execute this command on the input stream
* @throws IOException if an IO exception occurred.
* @throws DAP2Exception if the DODS server returned an error.
* @throws ParseException is cant parse the return
*/
private void openConnection(String urlString, Command command)
throws IOException, DAP2Exception, ParseException {
HTTPMethod method = null;
InputStream is = null;
initSession();
try {
method = _session.newMethodGet(urlString);
if (acceptCompress) method.setRequestHeader("Accept-Encoding", "deflate,gzip");
// enable sessions
if (allowSessions) method.setRequestHeader("X-Accept-Session", "true");
// Execute the method.
int statusCode = method.execute();
// debug
// if (debugHeaders) ucar.nc2.util.net.HttpClientManager.showHttpRequestInfo(f, method);
if (statusCode == HTTPSession.SC_NOT_FOUND) {
throw new DAP2Exception(DAP2Exception.NO_SUCH_FILE, method.getStatusText());
}
if (statusCode == HTTPSession.SC_UNAUTHORIZED) {
throw new InvalidCredentialsException(method.getStatusText());
}
if (statusCode != HTTPSession.SC_OK) {
throw new DAP2Exception(
"Method failed:" + method.getStatusText() + " on URL= " + urlString);
}
// Get the response body.
is = method.getResponseAsStream();
// check if its an error
Header header = method.getResponseHeader("Content-Description");
if (header != null
&& (header.getValue().equals("dods-error") || header.getValue().equals("dods_error"))) {
// create server exception object
DAP2Exception ds = new DAP2Exception();
is = dumpStream(is);
// parse the Error object from stream and throw it
ds.parse(is);
throw ds;
}
ver = new ServerVersion(method);
checkHeaders(method);
// check for deflator
Header h = method.getResponseHeader("content-encoding");
String encoding = (h == null) ? null : h.getValue();
// if (encoding != null) System.out.println("encoding= " + encoding);
if (encoding != null && encoding.equals("deflate")) {
is = new BufferedInputStream(new InflaterInputStream(is), 1000);
} else if (encoding != null && encoding.equals("gzip")) {
is = new BufferedInputStream(new GZIPInputStream(is), 1000);
}
command.process(is);
} catch (Exception e) {
e.printStackTrace();
throw new DAP2Exception(e);
} finally {
// Release the connection.
if (method != null) method.close();
}
}