一些简单的拦截器interceptor

我们知道在项目中添加拦截器有俩种方法 一种是addInterceptor(interceptor)
另一种是addNetworkInterceptor(interceptor)
那么这两种拦截器有什么区别呢 前者是添加应用拦截器 后者是添加网络拦截器
应用拦截器只管进出应用, 而具体里面的细节就需要网络拦截器来管理!比如一个
接口有重定向,那么用network去添加才能显示重定向前后的地址和信息
下面介绍简单的集中拦截器添加

• 日志拦截器

   private void logInterceptorTest() {
        // OkHttp拦截器
        Interceptor interceptor = new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                // 请求及请求相关信息
                Request request = chain.request(); // 核心代码：获取Request对象
                HttpUrl url = request.url();
                Headers headers = request.headers();
                String method = request.method();
                Log.i("Haoxueren", "intercept: " + url + "\n" + method + "\n" + headers);
                // 响应及响应相关信息
                Response response = chain.proceed(request); // 核心代码：继续向下执行网络请求
                String message = response.message();
                Headers responseHeaders = response.headers();
                ResponseBody responseBody = response.peekBody(Integer.MAX_VALUE);
                String string = responseBody.string();
                Log.i("Haoxueren", "intercept: " + message + "\n" + string);
                return response;
            }
        };
        OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(interceptor)
                .build();
        Request request = new Request.Builder()
                .url("接口自己找吧")
                .get()
                .build();
        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.i("Haoxueren", "onFailure: " + e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Log.i("Haoxueren", "onResponse: " + response.body().string());
            }
        });
    }

• 重定向拦截器(网络)

 private void networkInterceptorTest() {
        // OkHttp拦截器
        Interceptor interceptor = new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                // 请求及请求相关信息
                Request request = chain.request(); // 核心代码：获取Request对象
                HttpUrl url = request.url();
                Headers headers = request.headers();
                String method = request.method();
                Log.i("Haoxueren", "intercept: " + url);
                // 响应及响应相关信息
                Response response = chain.proceed(request); // 核心代码：继续向下执行网络请求
                String message = response.message();
                Headers responseHeaders = response.headers();
                ResponseBody responseBody = response.peekBody(Integer.MAX_VALUE);
                String string = responseBody.string();
                // Log.i("Haoxueren", "intercept: " + message + "\n" + string);
                return response;
            }
        };
        OkHttpClient client = new OkHttpClient.Builder()
                // .addInterceptor(interceptor)
                .addNetworkInterceptor(interceptor)
                .build();
        Request request = new Request.Builder()
                .url("http://www.publicobject.com/helloworld.txt")
                .header("className", "1901B")
                .get()
                .build();
        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.i("Haoxueren", "onFailure: " + e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Log.i("Haoxueren", "onResponse: " + response.body().string());
            }
        });
    }

• 添加缓存的拦截器

 // 添加缓存
    private void addCacheHeaderTest() {
        File cacheDir = context.getCacheDir(); // 不需要读写SD卡权限
        Interceptor interceptor = new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request = chain.request();
                return chain.proceed(request).newBuilder()
                        .removeHeader("Pragma")
                        .header("Cache-Control", "max-age=3600")
                        .build();
            }
        };
        OkHttpClient client = new OkHttpClient.Builder()
                .cache(new Cache(cacheDir, 1024 * 1024 * 10)) // 10M
                .addNetworkInterceptor(interceptor)
                .build();

        Request request = new Request.Builder()
                .url("https://gitee.com/Haoxueren/codes/5h3p0q4y8sa6rlme2kunw73/raw?blob_name=stars")
                //.cacheControl(new CacheControl.Builder()..build())
                .build();
        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.i("Haoxueren", "onFailure: " + e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Log.i("Haoxueren", "onResponse: " + response.body().string());
            }
        });
    }