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Use default application credential #27

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kroikie wants to merge 3 commits into from
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Use default application credential #27

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a1b2b35
Use default application credential
kroikie Jan 25, 2019
01c89d2
Update docs for getAccessToken
kroikie Jan 30, 2019
82bc562
Explain token refresh strategy
kroikie Jan 30, 2019
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2 changes: 1 addition & 1 deletion config/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ Getting started

1. [Add Firebase to your Android Project](https://firebase.google.com/docs/android/setup).
2. Create a service account as described in [Adding Firebase to your Server](https://firebase.google.com/docs/admin/setup) and download the JSON file.
- Copy the private key JSON file to this folder and rename it to `service-account.json`.
- Set `GOOGLE_APPLICATION_CREDENTIALS` environment variable to path of downloaded credential file.
3. Change the `PROJECT_ID` variable in `Configure.java` to your project ID.

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18 changes: 13 additions & 5 deletions config/src/main/java/com/google/firebase/samples/config/Configure.java
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Expand Up @@ -35,17 +35,23 @@ public class Configure {

/**
* Retrieve a valid access token that can be use to authorize requests to the Remote Config REST
* API.
* API. If there is no existing access token or if the existing one will expire in less than
* five minutes a fresh token is fetched.
*
* This method must be called in either a trusted Google environment like GCP or if running
* elsewhere the GOOGLE_APPLICATION_CREDENTIALS environment variable must be set to the path
* of the service account credentials file.
*
* @return Access token.
* @throws IOException
*/
// [START retrieve_access_token]
private static String getAccessToken() throws IOException {
GoogleCredential googleCredential = GoogleCredential
.fromStream(new FileInputStream("service-account.json"))
GoogleCredential googleCredential = GoogleCredential.getApplicationDefault()
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@hiranya911 hiranya911 Sep 30, 2019

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Should probably use com.google.auth.oauth2.GoogleCredentials here.

.createScoped(Arrays.asList(SCOPES));
googleCredential.refreshToken();
if (googleCredential.getAccessToken() == null || googleCredential.getExpiresInSeconds() < 300) {
googleCredential.refreshToken();
}
return googleCredential.getAccessToken();
}
// [END retrieve_access_token]
Expand Down Expand Up @@ -83,7 +89,9 @@ private static void getTemplate() throws IOException {
String etag = httpURLConnection.getHeaderField("ETag");
System.out.println("ETag from server: " + etag);
} else {
System.out.println(inputstreamToString(httpURLConnection.getErrorStream()));
System.out.println("Error:");
InputStream inputStream = new GZIPInputStream(httpURLConnection.getErrorStream());
System.out.println(inputstreamToString(inputStream));
}

}
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