通过OkHttp Interceptors拦截并重试调用

我需要在以下位置重试请求OkHttp Interceptor。例如有传入请求需要Authorization令牌。如果Authorization令牌已过期，服务器返回响应403代码。在这种情况下，我正在检索一个新令牌并尝试使用相同的令牌再次拨打电话chain object.

但是 OkHttp 会抛出一个异常，该异常表明您不能使用相同的内容发出两个请求chain目的。

java.lang.IllegalStateException: network interceptor org.app.api.modules.ApplicationApiHeaders@559da2 must call proceed() exactly once

我想知道是否有一个干净的解决方案来解决在内部重试网络请求的问题OkHttp Interceptor?

public final class ApplicationApiHeaders implements Interceptor {
    private static final String AUTHORIZATION = "Authorization";
    private TokenProvider mProvider;

    public ApplicationApiHeaders(TokenProvider provider) {
        mProvider = provider;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Token token = mProvider.getApplicationToken();
        String bearerToken = "Bearer " + token.getAccessToken();

        System.out.println("Token: " + bearerToken);
        Request request = chain.request();
        request = request.newBuilder()
                .addHeader(AUTHORIZATION, bearerToken)
                .build();

        Response response = chain.proceed(request);
        if (!response.isSuccessful() && isForbidden(response.code())) {
            Token freshToken = mProvider.invalidateAppTokenAndGetNew();
            String freshBearerToken = freshToken.getAccessToken();

            Request newRequest = chain.request();
            newRequest = newRequest.newBuilder()
                    .addHeader(AUTHORIZATION, freshBearerToken)
                    .build();

            response = chain.proceed(newRequest);
        }

        return response;
    }

    private static boolean isForbidden(int code) {
        return code == HttpURLConnection.HTTP_FORBIDDEN;
    }
}

Use .interceptors()代替.networkInterceptors()哪些被允许调用.proceed()不止一次。

欲了解更多信息，请参阅：https://square.github.io/okhttp/interceptors/ https://square.github.io/okhttp/interceptors/