CODEWITHSUNDEEP
javarestspring-mvcmicrosoft-graph-api
Batman22
Batman22

Reputation: 366

Accessing Microsoft Graph Rest Services in Java using Web App Credentials in Azure Portal

I am trying to access the following url via Microsoft Graph Api :- https://graph.microsoft.com/v1.0/me I have used the code given below found on stackoverflow which should ideally give me JSON. But I am getting exception while running the code :-

try {
            String url_str = "https://graph.microsoft.com/v1.0/me";
            String access_token = getAccessToken();

            url = new URL(url_str);
            con = ( HttpURLConnection )url.openConnection();
            con.setDoInput(true);
            con.setDoOutput(true);
            con.setUseCaches(false);
            con.setRequestMethod("GET");
            con.setRequestProperty("Authorization", access_token);
            con.setRequestProperty("Accept","application/json");
            con.connect();

            br = new BufferedReader(new InputStreamReader( con.getInputStream() ));
            String str = null;
            String line;
            while((line = br.readLine()) != null){
                str += line;
            }
            System.out.println(str);
        } catch (Exception e) {
            e.printStackTrace();
        }

I am getting valid access token. But I am getting following exception:-

java.io.FileNotFoundException: https://graph.microsoft.com/v1.0/me
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at com.controller.MicrosoftGraphController.getUserInfo(MicrosoftGraphController.java:50)
    at com.controller.MicrosoftGraphController.main(MicrosoftGraphController.java:82)

I tried searching but haven't found anything related to this particular issue. Any Suggestions? Thanks!

Upvotes: 0

Views: 547

Answers (3)

Batman22
Batman22

Reputation: 366

After looking at my code. I realized as I have created web app in azure portal and I am using the app credentials to get authentication token. So the url that I was trying was related to the personal account "https://graph.microsoft.com/v1.0/me" but after trying "https://graph.microsoft.com/v1.0/users/" I was able to access the graph api's. Auth token has nothing to do with this.

Upvotes: 0

stdunbar
stdunbar

Reputation: 17455

Change your code to be:

con.setRequestProperty("Authorization", "Bearer " + access_token);

You're using the OAuth2 protocol and it needs more than just the raw token. Note the space character after the word "Bearer" in the code.

Take a look at the docs for more detail.

Upvotes: 1

Caitlin Russell
Caitlin Russell

Reputation: 596

Because the service is returning an error instead of a valid response, I believe you will have to handle this in your code manually:

int httpClientErrorResponseCode = 400;
InputStream response;

if (con.getResponseCode() >= httpClientErrorResponseCode) {
    response = con.getErrorStream();
} else {
    response = con.getInputStream();
}
// Stream response or handle error

Upvotes: 0

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