Henceforth OnlineTSPSource (RFC 3161) uses exclusively DataLoader to communicate with TSA...

Up to the version 4.3.0, to communicate with the TSA the SD-DSS framework either used URLConnection or DataLoader based on HttpClient (org.apache.http.client). This presented problems of consistency regarding the management of authentication and proxy. Henceforth each instance of the OnlineTSPSource uses a DataLoader. However it is not always necessary to create a dedicated instance of DataLoader, indeed an instance is automatically created if it has not been explicitly set. When a dedicated instance of DataLoader is used then the Content-Type should be specified:

CommonsDataLoader dataloader = new CommonsDataLoader (OnlineTSPSource.CONTENT_TYPE)

where the CONTENT_TYPE is equal to "application/timestamp-query".

To attach the authentication information (simple credentials implementation based on a user name/password pair) to the DataLoader the following method must be used:

dataloader.addAuthentication(host, -1, protocol, userName, password);

...and finally the code that creates the OnlineTSPSource object and associates to it the dataLoader:

OnlineTSPSource tspSource = new OnlineTSPSource("http://myopentsa.org:8080/tsa");
tspSource.setDataLoader(dataLoader);

• Time Stamping Authority (TSA)