fix: change revoke request from get to post (#979)

Author: sai-sunder-s

oauth2_http/java/com/google/auth/oauth2/UserAuthorizer.java

@@ -315,10 +315,14 @@ public void revokeAuthorization(String userId) throws IOException {
  OAuth2Utils.validateOptionalString(tokenJson, "refresh_token", TOKEN_STORE_ERROR);
  // If both tokens are present, either can be used
  String revokeToken = (refreshToken != null) ? refreshToken : accessTokenValue;
+
  GenericUrl revokeUrl = new GenericUrl(OAuth2Utils.TOKEN_REVOKE_URI);
- revokeUrl.put("token", revokeToken);
+ GenericData genericData = new GenericData();
+ genericData.put("token", revokeToken);
+ UrlEncodedContent content = new UrlEncodedContent(genericData);
+
  HttpRequestFactory requestFactory = transportFactory.create().createRequestFactory();
- HttpRequest tokenRequest = requestFactory.buildGetRequest(revokeUrl);
+ HttpRequest tokenRequest = requestFactory.buildPostRequest(revokeUrl, content);
  tokenRequest.execute();
 
  if (deleteTokenException != null) {

oauth2_http/javatests/com/google/auth/oauth2/MockTokenServerTransport.java

@@ -257,7 +257,7 @@ public LowLevelHttpResponse execute() throws IOException {
  return new MockLowLevelHttpRequest(url) {
  @Override
  public LowLevelHttpResponse execute() throws IOException {
- Map<String, String> parameters = TestUtils.parseQuery(query);
+ Map<String, String> parameters = TestUtils.parseQuery(this.getContentAsString());
  String token = parameters.get("token");
  if (token == null) {
  throw new IOException("Token to revoke not found.");