having trouble getting oauth2 token from azure w/ java

[robert_karen]

Hi,

I am new to developing BI apps and am stuck trying to get authentication for a web server app via azure.

I am getting an authentication code, but when I try to request an authentication token I only get http response

code 400. I am using the java code below. can someone tell me what I'm doing wrong? When I send it to my own

server and read the values it looks ok, but azure sends me back error 400. Thanks for any ideas!

	private void doRequestToken() {
		showMsg("begin");
		String u = "https://login.microsoftonline.com/common/oauth2/token";
		//String u = "http://load.crosstab.com:8080/cgi-bin/test-cgi.tcl";
		try {
			//System.out.println("beginning RequestToken...");
			String code = Executions.getCurrent().getParameter("code");
			showMsg("code = " + code);
			String access_token;
			if (code != null && !code.isEmpty()) {
				String rawData = "code=" + code;
				rawData += "&grant_type=authorization_code";
				rawData += "&client_id=b10be962-4d37-4017-abbb-afee851e5c61";
				rawData += "&redirect_uri=http%3A%2F%2Fload.crosstab.com%3A9090%2FezTAB2BIGetToken%2F";
				//rawData += "&redirect_uri=http://load.crosstab.com:9090/ezTAB2BIGetToken/";
				//String type = "application/x-www-form-urlencoded";
				//String encodedData = URLEncoder.encode( rawData, "UTF-8" );
				URL url = new URL(u);
				showMsg("opening connection to " + u);
				HttpURLConnection conn = (HttpURLConnection) url.openConnection();
				conn.setDoOutput(true);
				conn.setRequestMethod("POST");
				conn.setRequestProperty("User-Agent", USER_AGENT);
				conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
				//conn.setRequestProperty("Content-type", type);
				//conn.setRequestProperty("Content-length", String.valueOf(rawData.length()));
				DataOutputStream os = new DataOutputStream(conn.getOutputStream());
				os.writeBytes(rawData);
				os.flush();
				os.close();
				BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
				String line;
				while ((line = in.readLine()) != null) {
					showMsg("received: " + line);
				}

[robert_karen]

to be clear the authorization token I am trying to get is for Azure AD. Thanks.

[Greg_Deckler]

http://www.cloudidentity.com/blog/2013/07/23/securing-a-web-api-with-windows-azure-ad-and-katana/

http://stackoverflow.com/questions/18437173/how-to-get-access-token-after-windows-azure-active-direc...

ClaimsPrincipal cp = ClaimsPrincipal.Current;
ClaimsIdentity ci = cp.Identity as ClaimsIdentity;
BootstrapContext bc = ci.BootstrapContext as BootstrapContext;
SecurityToken securityToken = bc.SecurityToken;

You also need to set the saveBootstrapContext attribute in your config file:

<system.identityModel>
    <identityConfiguration saveBootstrapContext="true">
    ...
</system.identityModel>

[robert_karen]

Thanks, but these don't address my question. I am trying to use a simple Java program to get authorization

token from Azure AD in order to use Power BI RESt api. I am having trouble  as I described above. Thanks again.

[curth]

Have you looked at the body of the 400 response to see if there's any additional information?

[robert_karen]

Thanks for responding.

Somehow the http 400 throws a java IOException. In the exception code I tried reading getErrorStream() from the

HttpURLConnection ('conn' in my code above) but nothing meaningful came down. I know there is supposed to be a json

returned w/ the 400. getInputStream() didn't return anything either. Do you know how to get to it in java?

.

[curth]

I'm sorry, I'm not familiar with the Java HTTP libraries.

[robert_karen]

Maybe you can clarify that I am using correct resource_uri. The one I have registerred in azure is the one included in the request for the auth. code, and it is where the code

response is sent. then that same web app which received the code is making the request for the token, which contains the same resource_uri  parameter as in the request-

so the web app requesting the token includes a resource_uri which is 'itself'. is that correct? it doesn't sound right. 

thanks for any help?