JavaCode To Connect API Mgr Using Client Id/Client Secret/Token - wso2

Question

I have a BE Java Service, which is RESTFul, which is ported on WSO2 API Manager. It is published and available in Store. I have registered a new Application (by Name ' Java App ') and upon subscribing to that API, it provided me with Client Key and Client Secret along with Token. Using the Token I am able to successfully access the API (from SOAP UI). My requirement is to access the API from a standalone Java Application. Can someone direct me or provide appropriate code that can access the published API.
Regards, Sreedhar.

Answer 1

You can use Apache HTTP client to invoke the API by sending Authorization as a HTTP Header.
String url = "API_URL";
HttpClient client = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(url);
// add Authorization Header header
request.addHeader("Authorization", "Bearer :" + accessToken);
HttpResponse response = client.execute(request);
System.out.println("Response Code : "
+ response.getStatusLine().getStatusCode());
BufferedReader rd = new BufferedReader(
new InputStreamReader(response.getEntity().getContent()));
StringBuffer result = new StringBuffer();
String line = "";
while ((line = rd.readLine()) != null) {
result.append(line);
}
For Generating Token with username, password and Client Key / Secret, You can use following cURL sample to build the HTTP request. More information can be found in token api
curl -k -d "grant_type=password&username=<username>&password=<password>" -H "Authorization: Basic SVpzSWk2SERiQjVlOFZLZFpBblVpX2ZaM2Y4YTpHbTBiSjZvV1Y4ZkM1T1FMTGxDNmpzbEFDVzhh" -H "Content-Type: application/x-www-form-urlencoded" https://localhost:8243/token
You have to base 64 encode Client Key / Secret and send it with Authorization header as Basic.