简单的拦截器请求头

public class Logger implements Interceptor{
@Override
public Response intercept(Chain chain) throws IOException {
Request original = chain.request();
HttpUrl url=original.url().newBuilder()
//需要添加的公共参数，以键值对形式添加
.addQueryParameter("source","android")
.build();
//添加请求头
Request request = original.newBuilder()
.url(url)
.build();
return chain.proceed(request);
}
}