SpringTemplate OAuth2 Client example

OAuthClientExample

public class OAuthClientTest {

    @Test
    public void test() {
        ResourceOwnerPasswordResourceDetails resource = new ResourceOwnerPasswordResourceDetails();
        resource.setClientAuthenticationScheme(AuthenticationScheme.header);
        resource.setId("restservice");
        resource.setClientId("clientapp");
        resource.setClientSecret("123456");
        resource.setAccessTokenUri("http://localhost:8080/oauth/token");
        resource.setScope(Lists.newArrayList("read", "write"));
        resource.setUsername("luochun");
        resource.setPassword("secret1");
        OAuth2RestTemplate template = new OAuth2RestTemplate(resource);
        String reply = template.getForObject("http://localhost:8080/api/check", String.class);
        assertThat(reply, is("ok"));
        
        OAuth2AccessToken token = template.getAccessToken();
        String tokenValue = token.getValue();
        
        OAuth2ProtectedResourceDetails resource2 = new BaseOAuth2ProtectedResourceDetails();
        OAuth2ClientContext context = new DefaultOAuth2ClientContext();
        OAuth2AccessToken token2 = new DefaultOAuth2AccessToken(tokenValue);
        context.setAccessToken(token2);
        OAuth2RestTemplate template2 = new OAuth2RestTemplate(resource2, context);
        String reply2 = template2.getForObject("http://localhost:8080/api/check", String.class);
        assertThat(reply2, is("ok"));
    }
    
    @Test
    public void test2() throws ClientProtocolException, IOException {
        HttpClient client = HttpClientBuilder.create().build();

        // unauthorized
        HttpGet get = new HttpGet("http://localhost:8080/api/check");
        HttpResponse getRes = client.execute(get);
        String getReply = EntityUtils.toString(getRes.getEntity());
        System.out.println(getReply);

        // acquire token
        String address = "http://localhost:8080/oauth/token";
        HttpPost post = new HttpPost(address);

        String encoding = Base64.encodeBase64String("clientapp:".getBytes());
        post.setHeader("Authorization", "Basic " + encoding);

        List<NameValuePair> pairs = new ArrayList<NameValuePair>();
        pairs.add(new BasicNameValuePair("username", "luochun"));
        pairs.add(new BasicNameValuePair("password", "secret1"));
        pairs.add(new BasicNameValuePair("grant_type", "password"));
        pairs.add(new BasicNameValuePair("scope", "read write"));
        pairs.add(new BasicNameValuePair("client_id", "clientapp"));
        pairs.add(new BasicNameValuePair("client_secret", "123456"));
        post.setEntity(new UrlEncodedFormEntity(pairs));

        HttpResponse response = client.execute(post);
        String reply = EntityUtils.toString(response.getEntity());

        ObjectMapper mapper = new ObjectMapper();
        HashMap<String, String> map = mapper.readValue(reply, HashMap.class);
        String token = map.get("access_token");
        System.out.println(token);

        HttpGet get2 = new HttpGet("http://localhost:8080/api/check");
        get2.setHeader("Authorization", "Bearer " + token);
        HttpResponse getRes2 = client.execute(get2);
        String getReply2 = EntityUtils.toString(getRes2.getEntity());
        System.out.println(getReply2);

    }    
}