Simple Registration HowTo

The usage pattern exemplified below is almost identical to the usage of Attribute Exchange.

Attribute Exchange can transfer any type of attributes. For more information see the OpenID Attribute Exchange 1.0 specification and OpenID Attribute Types.

Relying Party sends a SRegRequest

SRegRequest sregReq = SRegRequest.createFetchRequest();

sregReq.addAttribute("fullname", true);
sregReq.addAttribute("nickname", true);
sregReq.addAttribute("email", true);

AuthRequest req = _consumerManager.authenticate(discovered, return_to);
req.addExtension(sregReq);

OpenID Provider receives a SRegRequest

if (authReq.hasExtension(SRegMessage.OPENID_NS_SREG))
{
    MessageExtension ext = authReq.getExtension(SRegMessage.OPENID_NS_SREG)

    if (ext instanceof SRegRequest)
    {
        SRegRequest sregReq = (SRegRequest) ext;
        List required = sregReq.getAttributes(true);
        List optional = sregReq.getAttributes(false);
        // prompt the user
    }
}

OpenID Provider sends a SRegResponse

    // data released by the user
    Map userData = new HashMap();
    //userData.put("email", "user@example.com");

    SRegResponse sregResp = SRegResponse.createSRegResponse(sregReq, userData);

    // (alternatively) manually add attribute values
    sregResp.addAttribute("email", "user@example.com");

    authSuccess.addExtension(sregResp);

Relying Party receives a SRegResponse

if (authSuccess.hasExtension(SRegMessage.OPENID_NS_SREG))
{
    MessageExtension ext = authSuccess.getExtension(SRegMessage.OPENID_NS_SREG);

    if (ext instanceof SRegResponse)
    {
        SRegResponse sregResp = (SRegResponse) ext;
        
        String fullName = sregResp.getAttributeValue("fullname");
        String nickName = sregResp.getAttributeValue("nickname");
        String email = sregResp.getAttributeValues("email");
    }
}