Authenticates a user against SDL WorldServer using the REST API returning a Security Token

WSRestUtils01.java

public static String getSecurityToken(String wsBaseUrl, String username, String password) throws IOException {
	StringBuilder loginJson = new StringBuilder();
	loginJson.append("{");
	loginJson.append("\"username\":\"" + username + "\",");
	loginJson.append("\"password\":\"" + password + "\"");
	loginJson.append("}");

	HttpClient httpClient = HttpClientBuilder.create().build();
	HttpPost httpPostRequest = new HttpPost(wsBaseUrl + "/ws-api/v1/login");
	httpPostRequest.setHeader(new BasicHeader("Content-Type", "application/json"));
	httpPostRequest.setHeader(new BasicHeader("Accept", "application/json"));
	httpPostRequest.setEntity(new StringEntity(loginJson.toString()));

	HttpResponse response = httpClient.execute(httpPostRequest);

	Gson gson = new GsonBuilder().create();
	JsonObject jsonLoginResponse = gson
		.fromJson(new InputStreamReader(response.getEntity().getContent()), JsonObject.class);

	return jsonLoginResponse.getAsJsonPrimitive("sessionId").getAsString();
}