Android Retrofit 2.0 添加带有拦截器的标头不起作用答案

【问题标题】：Android Retrofit 2.0 adding headers with interceptor doesn't workAndroid Retrofit 2.0 添加带有拦截器的标头不起作用
【发布时间】：2018-03-04 00:04:03
【问题描述】：

我有 OkHttp 客户端的 Singleton 匕首模块，我正在尝试使用 Interceptor 添加标头

@Provides
@Singleton
OkHttpClient provideOkhttpClient(Cache cache, final LocalData localData) {
    HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
    logging.setLevel(HttpLoggingInterceptor.Level.HEADERS);

    OkHttpClient.Builder client = new OkHttpClient.Builder();
    client.readTimeout(60, TimeUnit.SECONDS);
    client.addInterceptor(logging);
    client.addNetworkInterceptor(new Interceptor() {
        @Override
        public Response intercept(@NonNull Chain chain) throws IOException {
            Request original = chain.request();
            Request.Builder requestBuilder = original.newBuilder()
                    .addHeader("Hp-Application", "Android");
            Request request = requestBuilder.build();
            Response originalResponse = chain.proceed(request);
            try {
                if (originalResponse.code() == 200) {
                    localData.setLastUpdateTime(System.currentTimeMillis());
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return originalResponse;
        }
    });
    client.connectTimeout(60, TimeUnit.SECONDS);
    client.cache(cache);
    return client.build();
}

但是查看日志我看不到预期的标题。我也收到错误，因为如果没有必需的标头，特定调用将无法工作。

我还尝试使用不同的类将其添加到 addInterceptor()/addNetworkInterceptor()

 public class HeaderInterceptor
        implements Interceptor {
    @Override
    public Response intercept(Chain chain)
            throws IOException {
        Request request = chain.request();
        request = request.newBuilder()
                .addHeader("Hp-Application", "Android")
                .build();
        return chain.proceed(request);
    }
}

但是这种方式对我也不起作用。

如何将此标头添加到只有一个实现的应用程序的每个调用中？

【问题讨论】：

标签： android retrofit2 interceptor okhttp3

【解决方案1】：

添加拦截器的顺序很重要。您的日志拦截器首先运行，然后才运行添加标头的拦截器。

为了获得最佳的日志记录体验，请将日志拦截器设置为您添加的最后一个。

【讨论】：

是否有任何文档或发行说明中提到了这一点，这会有所帮助，请尽可能更新
这是一个非常重要的信息。顺序真的很重要。谢谢

【解决方案2】：

嘿@Igor 试试这个 sn-p 这可能会有所帮助

public class RetrofitClient {

    private static String BASE_URL = "http://192.168.0.100/rest/main.php/";
    private static Retrofit retrofit = null;

    public static Retrofit getRetroftInstance() {
        if (retrofit == null) {

            OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
            httpClient.addNetworkInterceptor(new SessionRequestInterceptor());
            httpClient.addNetworkInterceptor(new ReceivedCookiesInterceptor());

            retrofit = new Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(httpClient.build())
                    .build();
        }

        return retrofit;
    }}

public class ReceivedCookiesInterceptor implements Interceptor {

    @Override
    public Response intercept(Chain chain) throws IOException {
        Response originalResponse = chain.proceed(chain.request());

        if (!originalResponse.headers("Set-Cookie").isEmpty()) {
            HashSet<String> cookies = new HashSet<>();
            for (String header : originalResponse.headers("Set-Cookie")) {
                cookies.add(header);
                if(header.startsWith("XSRF-TOKEN")) {
                    String newCookie[]=header.split(";");
                    System.out.println("newCookie Length: "+newCookie.length);
                    for(String ss:newCookie) {
                        if(ss.startsWith("XSRF-TOKEN")) {
                            System.out.println("Cookies ss: " + ss);
                            sharedPrefs.setToken(ss);
                        }
                    }
                }
            }
        }
        return originalResponse;
    }
}

public class SessionRequestInterceptor implements Interceptor {

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request original = chain.request();

        Request.Builder request = original.newBuilder();

        request.header("Cookie",ServiceSharedPrefs.getInstance().getToken()));

        request.method(original.method(), original.body());

        return chain.proceed(request.build());
    }

}

【讨论】：

【解决方案3】：

new OkHttpClient.Builder()
            .addInterceptor(
                    new Interceptor() {
                        @Override
                        public Response intercept(Chain chain) throws IOException {
                            Request original = chain.request();



                            // Request customization: add request headers
                            Request.Builder requestBuilder = original.newBuilder().
                                    header(AUTHENTICATION_HEADER, AUTHENTICATION_KEY).
                                    method(original.method(), original.body());


                            Request request = requestBuilder.build();

                            //System.out.println(request.toString());

                            return chain.proceed(request);
                        }
                    }).addInterceptor(logging)
            .build();

【讨论】：