如何在Android设备上使用http / 2和Okhttp？ [英] How to use http/2 with Okhttp on Android devices?

问题描述

我正在测试支持HTTP / 2的网站，这样的，
和我尝试使用okhttp发送请求：

I'M testing a site that supports HTTP/2,like this, and I try to use okhttp to send the request:

OkHttpClient okHttpClient = new OkHttpClient();

Request request = new Request.Builder()
        .url("https://www.google.it")
        .build();


okHttpClient.newCall(request).enqueue(new Callback() {
    @Override
    public void onFailure(Request request, IOException e) {
        e.printStackTrace();
    }

    @Override
    public void onResponse(Response response) throws IOException {
        Log.d("TestHttp", "OkHttp-Selected-Protocol: " + response.header("OkHttp-Selected-Protocol"));
        Log.d("TestHttp", "Response code is " + response.code());
    }
});

在日志中我得到这样的结果：

In the log I got something like this:

OkHttp-Selected-Protocol: http/1.1

okhttpClient选择使用http / 1.1，如何强制它使用HTTP / 2？

The okhttpClient chose to use http/1.1, how can I force it to use HTTP/2?

推荐答案

Okhttp 2.5+仅支持http / 2通过ALPN高于5.0+。

Okhttp 2.5+ only support http/2 above 5.0+ via ALPN.

但您可以修改源代码以通过NPN支持高于4.0+的http / 2.

but you can modify the source code to support http/2 above 4.0+ via NPN.

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