某些API应该是服务器设置了限制，使得手机端okhttp作为 http客户端时，获取数据，服务器返回HTTP 403禁止访问。
服务器禁止访问了，因为okhttp并不是真正的原生的http请求，它在header中并没有真正的User-Agent，而是“okhttp/版本号”。
如果是单纯的okHttp请求，不加Retrofit的
Request request = new Request.Builder().url(url)
.removeHeader(“User-Agent”)
.addHeader(“User-Agent”, WebSettings.getDefaultUserAgent(App.getINSTANCE()))
.build();
httpClient.newCall(request).enqueue(handler);
如果是okHttp+Retrofit
public class NetWork {
private static MusicApi musicApi;
private static Converter.Factory gsonConverterFactory = GsonConverterFactory.create();
private static CallAdapter.Factory rxJavaCallAdapterFactory = RxJava2CallAdapterFactory.create();
public static MusicApi getMusicApi() {
if (musicApi == null) {
Retrofit retrofit = new Retrofit.Builder()
.client(getOkHttpClient())//获取后的okhttp头部
.baseUrl(“http://tingapi.ting.baidu.com/v1/restserver/”)
.addConverterFactory(gsonConverterFactory)
.addCallAdapterFactory(rxJavaCallAdapterFactory)
.build();
musicApi = retrofit.create(MusicApi.class);
}
return musicApi;
}
/**
* 构造okhttp头部
*
* */
private static OkHttpClient getOkHttpClient() {
OkHttpClient httpClient = new OkHttpClient.Builder()
.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request()
.newBuilder()
.removeHeader(“User-Agent”)//移除旧的
.addHeader(“User-Agent”, WebSettings.getDefaultUserAgent(App.getINSTANCE()))//添加真正的头部
.build();
return chain.proceed(request);
}
}).build();
return httpClient;
}
}
参考：
https://www.jianshu.com/p/4132b381f07e
参考：
https://blog.csdn.net/dubo_csdn/article/details/90478831