关于okhttp的自定义拦截器

public class MyInterceptor implements Interceptor {
@Override
public Response intercept(Chain chain) throws IOException {
//获取原始的请求数据
Request orginRequest = chain.request();
//先获取原始的请求参数，然后再拼接起来
FormBody orginBody = (FormBody) orginRequest.body();
FormBody.Builder builder = new FormBody.Builder();
for (int i = 0; i < orginBody.size(); i++) {
String name = orginBody.name(i);
String value = orginBody.value(i);
builder.add(name, value);
}
builder.add("source", "android");
FormBody formBody = builder.build();
Request request = new Request.Builder().url(orginRequest.url()).post(formBody).build();

return chain.proceed(request);

}
}