I'm using Query Tasks method: https://asana.com/developers/api-reference/tasks#query using following code snipet:
String url = API_BASE+"/tasks?completed_since=now";
System.out.println(url);
HttpGet httpget = new HttpGet(url);
httpget.addHeader( BasicScheme.authenticate(creds, "US-ASCII", false) );
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
ERROR:
https://app.asana.com/api/1.0/tasks?completed_since=now
null
org.apache.http.client.HttpResponseException: Bad Request
at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:67)
at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:54)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:735)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:709)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:700)