深入了解OkHttp3之Interceptors

public final class HeaderInterceptorTest implements Interceptor {

  /**
   * 请求头参数基础参数
   */
  private static final String HEADER_BASE_PARAM = "baseParam";
  private static String BASE_PARAM;

  @Override
  public Response intercept(Chain chain) throws IOException {

    Request.Builder builder = chain.request().newBuilder();

    builder.addHeader(HEADER_BASE_PARAM, BASE_PARAM);
    return chain.proceed(builder.build());
  }

  public static void initBaseParam(Context context) {
    BaseParam baseParam = new BaseParam();
    String imei;
    String imsi;
    try {
      imei = DeviceInfoUtil.getIMEI(context);
    } catch (Exception e) {
      imei = null;
    }
    if (null == imei || imei.equals("")) {
      imei = DeviceInfoUtil.getDeviceID(context);
      imsi = DeviceInfoUtil.getDeviceID(context);
    } else {
      imei = DeviceInfoUtil.getIMEI(context);
      imsi = DeviceInfoUtil.getIMSI(context);
    }
    baseParam.setImei(imei);
    baseParam.setImsi(imsi);
    baseParam.setMac(DeviceInfoUtil.getWifiMAC(context));
    baseParam.setVersion(DeviceInfoUtil.getVersion(context));
    baseParam.setModel(DeviceInfoUtil.getModel());
    baseParam.setBrand(DeviceInfoUtil.getBrand());
    BASE_PARAM = new Gson().toJson(baseParam).toString();
  }

  private static class BaseParam {
    /**
     * imei :
     * imsi :
     * mac :
     * version :
     * model :
     * brand :
     * city :
     */
    private String imei;
    private String imsi;
    private String mac;
    private String version;
    private String model;
    private String brand;
    private String city;

    public String getImei() {
      return imei;
    }

    public void setImei(String imei) {
      this.imei = imei;
    }

    public String getImsi() {
      return imsi;
    }

    public void setImsi(String imsi) {
      this.imsi = imsi;
    }

    public String getMac() {
      return mac;
    }

    public void setMac(String mac) {
      this.mac = mac;
    }

    public String getVersion() {
      return version;
    }

    public void setVersion(String version) {
      this.version = version;
    }

    public String getModel() {
      return model;
    }

    public void setModel(String model) {
      this.model = model;
    }

    public String getBrand() {
      return brand;
    }

    public void setBrand(String brand) {
      this.brand = brand;
    }

    public String getCity() {
      return city;
    }

    public void setCity(String city) {
      this.city = city;
    }
  }
}

public class HttpDataPackInterceptorTest implements Interceptor {

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

    Request.Builder requestBuilder = chain.request().newBuilder();
    //请求数据处理
    if (request.url().toString().contains("uploads")) {
      //特殊接口的参数不需要处理的
    } else {
      //需要处理请求参数的
      if (request.body() instanceof FormBody) {
        FormBody.Builder newFormBody = new FormBody.Builder();
        //得到请求时设置的请求体
        FormBody oldFormBody = (FormBody) request.body();
        Buffer buffer = new Buffer();
        oldFormBody.writeTo(buffer);
        String postParams = JsonUtils.getJsonStrFromPostParams(buffer.readString(Charset.forName("UTF-8")));
        String data = URLDecoder.decode(postParams, "UTF-8");
        if (TextUtils.isEmpty(data)) {
          newFormBody.add("data", "");
        } else {
          //将请求的数据封装
          newFormBody.add("data", data);
        }
        requestBuilder.method(request.method(), newFormBody.build());
      }
    }
    return chain.proceed(requestBuilder.build());
  }
}

private OkHttpClient client;
  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_okhttp);
    HeaderInterceptorTest.initBaseParam(this);
    client= new OkHttpClient()
        .newBuilder()
        .addInterceptor(new HeaderInterceptorTest())
        .addInterceptor(new HttpDataPackInterceptorTest())
        .connectTimeout(60, TimeUnit.SECONDS)
        .writeTimeout(60, TimeUnit.SECONDS)
        .readTimeout(60, TimeUnit.SECONDS).build();
    okhttpAsyncPost();
  }

  private void okhttpAsyncPost(){
    RequestBody formBody = new FormBody.Builder()
        .add("page", "1")
        .add("count", "2")
        .add("type","video")
        .build();
    Request request = new Request.Builder()
        .url("https://api.apiopen.top/getJoke")
        .post(formBody)
        .build();

    client.newCall(request).enqueue(new Callback() {
      @Override
      public void onFailure(Call call, IOException e) {

      }

      @Override
      public void onResponse(Call call, Response response) throws IOException {
        Log.e("error","结果"+response.body().string());
        Log.e("error","方法"+response.request().toString());
        Log.e("error","请求头"+response.request().headers().toString());
      }
    });
  }