现象说明

用OKhttp框架请求http请求的时候会把user-agent带上；然而有些时候我们需要把请求头里面的user-agent去掉；

客户端程序：

private static final String BASE_URL = "http://192.168.253.200:8080/Chapter/";    public static void testHeaders() {    HttpClient httpClient = new HttpClient.Builder(BASE_URL).isDebug(false)            .add("header", "12345")            .header("master", "china")            .connectTimeout(5000)            .readTimeout(5000)            .build();    httpClient.Api().send(new HttpClient.Builder().url("postParam")            .add("header", "123459")            .add("master", "usa")            .add("token", "388298a0c89f4a38b2fed4cd4123d441")            .method(Method.POST)            .build(), new ResultSubscriber<>(new ResultListener

返回结果：

{"headers":{    "content-length":"76",    "host":"192.168.253.200:8080",    "client":"Android Client",    "content-type":"application/x-www-form-urlencoded",    "connection":"Keep-Alive",    "accept-encoding":"gzip",    "master":"china",    "user-agent":"okhttp/3.4.1"},"header":"123459","master":"usa","token":"388298a0c89f4a38b2fed4cd4123d441"}

你会发现： “user-agent”:”okhttp/3.4.1” 这是由于okhttp内置拦截器默认添加的。我们需要借助网络拦截器来重新拦截请求头；

解决方法：

利用拦截器来实现对user-agent删除

public class LogInterceptor implements Interceptor {private HttpClient builder;@Overridepublic Response intercept(Chain chain) throws IOException {      Request request = chain.request();      request =request.newBuilder().removeHeader("User-Agent").build();       Response response = chain.proceed(request);       okhttp3.MediaType mediaType = response.body().contentType();       String content = response.body().string();       return response.newBuilder()            .body(okhttp3.ResponseBody.create(mediaType, content))            .build();

然后利用网络拦截器来设置自定义的拦截器LogInterceptor ：

Builder okBuilder = new OkHttpClient.Builder()            .connectTimeout(mbuilder.getConnectTimeout(), TimeUnit.SECONDS)            .readTimeout(mbuilder.getReadTimeout(), TimeUnit.SECONDS)            .writeTimeout(mbuilder.getWriteTimeout(), TimeUnit.SECONDS)            .sslSocketFactory(OkhttpUtils.createSSLSocketFactory(), new OkhttpUtils. TrustAllCerts())// 信任所有证书            .hostnameVerifier(new OkhttpUtils.TrustAllHostnameVerifier());LogInterceptor logInterceptor = new LogInterceptor();    logInterceptor.setBuilder(mbuilder);    //okBuilder.addInterceptor(logInterceptor);//应用拦截器    okBuilder.addNetworkInterceptor(logInterceptor);//网络拦截器

最后重新发送网络请求：

{"headers":{    "content-length":"63",    "host":"192.168.253.200:8080",    "client":"Android Client",    "content-type":"application/x-www-form-urlencoded",    "connection":"Keep-Alive",    "accept-encoding":"gzip",    "master":"china"},"header":"123459","master":"usa","token":"388298a0c89f4a38b2fed4cd4123d441"}

说明：接口postParam是返回请求所有参数和请求头信息。代码就不展示出来了。

参考文献：

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