private MultiValueMap<String, String> getParametersForTokenRequest(
AuthorizationCodeResourceDetails resource, OAuth2ClientContext context) {
MultiValueMap<String, String> form = new LinkedMultiValueMap<String, String>();
form.add("grant_type", "authorization_code");
form.add("code", context.getAuthorizationCode());
String redirectUri = resource.getPreEstablishedRedirectUri();
if (context != null && redirectUri == null) {
// no pre-established redirect uri: use the preserved state
// TODO: treat redirect URI as a special kind of state (this is a historical mini hack)
redirectUri = String.valueOf(context.getPreservedState());
} else {
// TODO: the state key is what should be sent, not the value
form.add("state", String.valueOf(context.getPreservedState()));
}
if (redirectUri == null) {
// still no redirect uri? just try the one for the current context...
redirectUri = context == null ? null : context.getUserAuthorizationRedirectUri();
}
form.add("redirect_uri", redirectUri);
return form;
}
public OAuth2AccessToken obtainNewAccessToken(OAuth2ProtectedResourceDetails details)
throws UserRedirectRequiredException, AccessDeniedException {
AuthorizationCodeResourceDetails resource = (AuthorizationCodeResourceDetails) details;
OAuth2ClientContext context = OAuth2ClientContextHolder.getContext();
if (context != null && context.getErrorParameters() != null) {
// there was an oauth error...
throw getSerializationService().deserializeError(context.getErrorParameters());
} else if (context == null || context.getAuthorizationCode() == null) {
throw getRedirectForAuthorization(resource, context);
} else {
return retrieveToken(getParametersForTokenRequest(resource, context), resource);
}
}
private UserRedirectRequiredException getRedirectForAuthorization(
AuthorizationCodeResourceDetails resource, OAuth2ClientContext context) {
// we don't have an authorization code yet. So first get that.
TreeMap<String, String> requestParameters = new TreeMap<String, String>();
requestParameters.put("response_type", "code"); // oauth2 spec, section 3
requestParameters.put("client_id", resource.getClientId());
// Client secret is not required in the initial authorization request
String redirectUri = resource.getPreEstablishedRedirectUri();
if (redirectUri == null) {
if (context == null) {
throw new IllegalStateException(
"No OAuth 2 security context has been established: unable to determine the redirect URI for the current context.");
}
redirectUri = context.getUserAuthorizationRedirectUri();
if (redirectUri == null) {
throw new IllegalStateException(
"No redirect URI has been established for the current OAuth 2 security context.");
}
requestParameters.put("redirect_uri", redirectUri);
} else {
redirectUri = null;
}
if (resource.isScoped()) {
StringBuilder builder = new StringBuilder();
List<String> scope = resource.getScope();
if (scope != null) {
Iterator<String> scopeIt = scope.iterator();
while (scopeIt.hasNext()) {
builder.append(scopeIt.next());
if (scopeIt.hasNext()) {
builder.append(' ');
}
}
}
requestParameters.put("scope", builder.toString());
}
String stateKey = resource.getState();
if (stateKey != null) {
requestParameters.put("state", stateKey);
}
UserRedirectRequiredException redirectException =
new UserRedirectRequiredException(resource.getUserAuthorizationUri(), requestParameters);
if (redirectUri != null) {
redirectException.setStateKey(resource.getState());
redirectException.setStateToPreserve(redirectUri);
}
return redirectException;
}