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restlet

Does restlet add a user agent header by default?

Does the restlet java library add a user-agent header if the developer does not specify one?

If so, what is the value does it use for the header?

Solution

  • The content of the User-Agent header is available from the agent attribute of the ClientInfo class:

    // Client side
getRequest().getClientInfo().setAgent("something");

// Server side
String userAgent = getRequest().getClientInfo().getAgent();

    This can be set on the client side and gotten on the server side.

    If nothing is specified when sending a request with Restlet. For example, with such code:

    String url = "http://localhost:8182/contacts/";
ClientResource cr = new ClientResource(url);
cr.get();

    The content of the header is the following:

    Jetty/9.2.6.v20141205,Restlet-Framework/2.3.1

    In my case, I used Restlet 2.3.1 with the Jetty extension for the client connector (to actually send the request).

    If you set a value on the client side, as described below:

    String url = "http://localhost:8182/contacts/";
ClientResource cr = new ClientResource(url);
cr.getClientInfo().setAgent("My user agent");
cr.get();

    You will get now this value on the server side:

    Jetty/9.2.6.v20141205,My user agent

    Hope it helps you, Thierry