Retrofit2.0+OkHttp设置统一的请求头(request headers)

有时候要求Retrofit2的接口中每个都要增加上headers，又不想做重复的事情，可以使用这种方法来为每个request请求都设置上相同的请求头header。

修改请求头request headers主要是通过拦截器来实现，下面是我自己根据需要设置的。如果还有增加其他的header，可以再进行增加。

1. /**
2. * 请求拦截器，修改请求header
3. */
4. private class RequestInterceptor implements Interceptor{
5.  
6. @Override
7. public Response intercept(Chain chain) throws IOException {
8. Request request = chain.request()
9. .newBuilder()
10. .addHeader("Content-Type", "text/html; charset=UTF-8")
11. // .addHeader("Accept-Encoding", "*")
12. .addHeader("Connection", "keep-alive")
13. .addHeader("Accept", "*/*")
14. .addHeader("Access-Control-Allow-Origin", "*")
15. .addHeader("Access-Control-Allow-Headers", "X-Requested-With")
16. .addHeader("Vary", "Accept-Encoding")
17. // .addHeader("Cookie", "add cookies here")
18. .build();
19.  
20. Log.v("zcb", "request:" + request.toString());
21. Log.v("zcb", "request headers:" + request.headers().toString());
22.  
23. return chain.proceed(request);
24. }
25. }

使用方法：

1. private OkHttpClient getOkHttpClient() {
2. //定制OkHttp
3. OkHttpClient.Builder httpClientBuilder = new OkHttpClient
4. .Builder();
5. //设置超时时间
6. httpClientBuilder.connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);
7. httpClientBuilder.writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);
8. httpClientBuilder.readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);
9. //使用拦截器
10. httpClientBuilder.addInterceptor(new RequestInterceptor());
11. httpClientBuilder.addInterceptor(new LogInterceptor());
13. return httpClientBuilder.build();
14. }