Add handling for access token that enver expire (ex: GITHUB) (#492)

Co-authored-by: Abdul Qadir <abdul.qadir@ikhwatech.com>
Co-authored-by: Falk Wolsky <fw@business-inventor.com>

Author: 3 people

server/api-service/lowcoder-domain/src/main/java/org/lowcoder/domain/user/model/ConnectionAuthToken.java

@@ -30,11 +30,22 @@ public boolean isRefreshTokenExpired() {
     }
 
     public static ConnectionAuthToken of(AuthToken token) {
+
+        Long accessTokenExpiry = 0L;
+        if(token.getExpireIn() != 0) {
+            accessTokenExpiry = System.currentTimeMillis() / 1000 + token.getExpireIn() - 60;
+        }
+
+        Long refreshTokenExpiry = 0L;
+        if(token.getRefreshTokenExpireIn() != 0) {
+            refreshTokenExpiry = System.currentTimeMillis() / 1000 + token.getRefreshTokenExpireIn() - 60;
+        }
+
         return ConnectionAuthToken.builder()
                 .accessToken(token.getAccessToken())
-                .expireAt(System.currentTimeMillis() / 1000 + token.getExpireIn() - 60)
+                .expireAt(accessTokenExpiry)
                 .refreshToken(token.getRefreshToken())
-                .refreshTokenExpireAt(System.currentTimeMillis() / 1000 + token.getRefreshTokenExpireIn() - 60)
+                .refreshTokenExpireAt(refreshTokenExpiry)
                 .source(null)
                 .build();
     }

server/api-service/lowcoder-server/src/main/java/org/lowcoder/api/framework/filter/UserSessionPersistenceFilter.java

@@ -59,6 +59,9 @@ public Mono<Void> filter(@Nonnull ServerWebExchange exchange, WebFilterChain cha
                     user.getConnections().forEach(connection -> {
                         if(!connection.getAuthId().equals(DEFAULT_AUTH_CONFIG.getId())) {
                             Instant next5Minutes = Instant.now().plusSeconds( 300 );
+                            if(connection.getAuthConnectionAuthToken().getExpireAt() == 0) {
+                                return;
+                            }
                             boolean isAccessTokenExpiryNear = (connection.getAuthConnectionAuthToken().getExpireAt()*1000) <= next5Minutes.toEpochMilli();
                             if(isAccessTokenExpiryNear) {
                                 connection.getOrgIds().forEach(orgId -> {