android - 带有改造 2 的流媒体服务器 - 分块

Question

我应该从服务器流式传输端点，该端点返回带有传输编码的 json:分块。

我有以下代码，但无法读取响应。我尝试了 responseBody.streamBytes() 并将输入流转换为字符串，但我不能在主线程中执行此操作。我如何阅读回复？

@Streaming
@GET("stream/status")
Observable<ResponseBody> streamStatus();

Observable<ResponseBody> observable = ApiClientHelper.getClient().streamStatus();
    observable
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Observer<ResponseBody>() {
                @Override
                public void onSubscribe(Disposable d) {
                }

                @Override
                public void onNext(final ResponseBody responseBody) {
                   //DON'T KNOW HOW TO READ DATA
                }

                @Override
                public void onError(Throwable e) {
                }

                @Override
                public void onComplete() {
                }
            });

编辑:

使用 CURL 的服务器响应:

*   Trying 192.168.1.3...
* TCP_NODELAY set
* Connected to 192.168.1.3 (192.168.1.3) port 80 (#0)
> GET /stream/meter HTTP/1.1
> Host: 192.168.1.3
> User-Agent: curl/7.54.0
> Accept: */*
> Cookie:sessionId=bf2533346190e1c72b532b9d6ec6a405
> 
< HTTP/1.1 200 OK 
< Content-Type: text/event-stream
< Cache-Control: no-cache, no-store
< Date: Tue, 17 Oct 2017 12:02:03 GMT
< Transfer-Encoding: chunked
< Connection: Keep-Alive
< 
data: {"production":{"ph-a":{"p":-0.817,"q":0.0,"s":47.302,"v":225.697,"i":0.21,"pf":0.0,"f":50.0},"ph-b":{"p":-0.066,"q":-0.0,"s":0.643,"v":3.091,"i":0.206,"pf":0.0,"f":50.0},"ph-c":{"p":-0.195,"q":-0.0,"s":0.943,"v":7.577,"i":0.123,"pf":0.0,"f":50.0}},"net-consumption":{"ph-a":{"p":-0.598,"q":0.0,"s":51.931,"v":225.606,"i":0.231,"pf":0.0,"f":50.0},"ph-b":{"p":-0.088,"q":0.0,"s":0.875,"v":4.585,"i":0.19,"pf":0.0,"f":50.0},"ph-c":{"p":-0.043,"q":0.0,"s":0.16,"v":1.23,"i":0.13,"pf":-1.0,"f":50.0}},"total-consumption":{"ph-a":{"p":-1.415,"q":-0.0,"s":-4.599,"v":225.652,"i":-0.02,"pf":-1.0,"f":50.0},"ph-b":{"p":-0.154,"q":0.0,"s":0.06,"v":3.838,"i":0.016,"pf":-1.0,"f":50.0},"ph-c":{"p":-0.237,"q":0.0,"s":-0.033,"v":4.404,"i":-0.008,"pf":-1.0,"f":50.0}}}

Answer 1

添加 @Streaming 注释导致改造不会将整个文件移动到内存中，而是立即传递传入的字节。这使您能够处理可能大于总可用内存的数据流。但是，如果您尝试在主线程上执行此操作，您将得到一个 android.os.NetworkOnMainThreadException，这就是我假设您得到的。所以问题出在.observeOn(AndroidSchedulers.mainThread)。

编辑:公平警告。我没有运行这个。

    observable
            .subscribeOn(Schedulers.io())
            .observeOn(Schedulers.io())
            .subscribe(new Observer<ResponseBody>() {
                @Override
                public void onSubscribe(Disposable disposable) {

                }

                @Override
                public void onNext(ResponseBody responseBody) {
                    InputStream inputStream = responseBody.byteStream();
                    BufferedReader br = null;
                    StringBuilder sb = new StringBuilder();

                    String line;
                    try {

                        br = new BufferedReader(new InputStreamReader(inputStream));
                        while (br.ready()) {
                            line = br.readLine();
                            sb.append(line);
                        }

                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                        if (br != null) {
                            try {
                                br.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }

                    Log.d("streamed string", sb.toString()); // replace log with whatever you want to do with it.
                }

                @Override
                public void onError(Throwable throwable) {

                }

                @Override
                public void onComplete() {

                }
            });