Published Devices Client tool release: 1.1.0

tools/published_devices_client/httpclient/BUILD

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+# Copyright 2019 Google LLC. All rights reserved.
+# Desciption:
+# JTS http clients.
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+java_library(
+    name = "httpclient",
+    srcs = glob(["*.java"]),
+    deps = [
+        "@google_guice//:com_google_inject_guice",
+        "@json//:org_json_json",
+        "@google_api//:com_google_api_client_google_api_client",
+        "@google_http_client//:com_google_http_client_google_http_client",
+        "@google_oauth2//:com_google_oauth_client_google_oauth_client",
+        "@jackson2//:com_google_http_client_google_http_client_jackson2",
+        "@jackson_core//:com_fasterxml_jackson_core_jackson_core",
+    ],
+)

tools/published_devices_client/httpclient/Credentials.java

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+// Copyright 2019 Google LLC. All rights reserved.
+package com.google.video.widevine.jts.httpclient;
+
+import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * JTS Cloud Credentials.
+ *
+ * Provides Oauth2 authentication, and access/refresh tokens.
+ */
+public class Credentials {
+
+  private static final List<String> SCOPES = Arrays.asList(
+      "https://www.googleapis.com/auth/cloud-platform",
+      "https://www.googleapis.com/auth/widevine/frontend");
+  private static final int   MIN_ACCESS_TOKEN_REFRESH_SEC = 1200;
+  private static final Logger logger = Logger.getLogger(Credentials.class.getName());
+
+  private String credentialsJsonFile = null;
+  private GoogleCredential googleCredential = null;
+  private String accessToken = null;
+
+  /**
+   * Credentials Constructor.
+   *
+   * @param credentialsJsonFile The full path to a GCP service account json credentials file.
+   */
+  public Credentials(String credentialsJsonFile) throws IOException {
+    this.credentialsJsonFile = credentialsJsonFile;
+    activateGoogleCredentials();
+  }
+
+  private void activateGoogleCredentials() throws IOException {
+    googleCredential = GoogleCredential
+        .fromStream(new FileInputStream(credentialsJsonFile))
+        .createScoped(SCOPES);
+    googleCredential.refreshToken();
+  }
+
+  /** Provides an Oauth2 Access Token that can be used to make GCP service calls.*/
+  public String getAccessToken() throws IOException {
+    if (accessToken == null
+            || googleCredential.getExpiresInSeconds() <= MIN_ACCESS_TOKEN_REFRESH_SEC) {
+      googleCredential.refreshToken();
+      accessToken = googleCredential.getAccessToken();
+      logger.log(Level.INFO, "Getting new access token.");
+    }
+    return accessToken;
+  }
+}