重试HTTP（S）POST，直到他们在Android上成功 [英] Retry HTTP(S) POSTs until they succeed on Android

问题描述

我有一些数据将通过http（s）从Android应用程序发送到服务器。它需要按顺序发送。

I have some data which will be sent from an Android app to a server via http(s). It needs to be sent in-order.

是否已经存在一种排队http请求（对于同一服务器）并重试它们直到它们完成的方式（不一定成功） ）？

Does there already exist a way of queuing http requests (for the same server) and retrying them until they complete (not necessarily succeed)?

我的问题是，如果没有网络覆盖，http请求可能会失败。应该有某种形式的指数退避，或者一个监听器（用于网络重新连接）来提示重试队列的头部。

My problem is that http requests may fail if there is not network coverage. There should be some form of exponential back-off, or a listener (for network reconnection) to prompt retrying the head of the queue.

我可以自己写这个，但是我想检查一下我是不是在重新发明轮子。

I can write this myself, but I want to check that I'm not re-inventing the wheel.

推荐答案

有几个选项可以做到：

排球：

RequestQueue queue = Volley.newRequestQueue(ctx); // ctx is the context
StringRequest req = new StringRequest(Request.Method.GET, url,
    new Response.Listener<String>() {
        @Override
        public void onResponse(String data) {
            // We handle the response                           
        }
    },
    new Response.ErrorListener() {
        @Override
            // handle response
        }
    );
queue.add(req); 

OkHttp ：

OkHttpClient client = new OkHttpClient();
client.newCall(request).enqueue(new Callback() {
    @Override
    public void onFailure(Request request, IOException e) {
        // Handle error
    }

    @Override
        public void onResponse(Response response) throws IOException {
        //handle response
    }
});

或者您可以在请求中使用计数器并让服务器对它们进行排序。
如果您有兴趣了解有关Android Http库的更多详细信息，我会立即写一篇文章。看看这里

Or you can use a counter in your requests and let the server order them. If you are interested to have more details about Android Http libraries i wrote a post recentely. Give a look here

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