android 网络拦截器统一处理请求参数和返回值加解密实现

前言

项目中遇到参数加密和返回结果加密的业务
这里写一下实现一来加深记忆二来为以后参考铺垫

需求

项目在开发中涉及到 登陆 发验证码 认证 等前期准备接口
这些接口需要单独处理比如不加密或者有其他的业务需求

剩下的是登陆成功以后的业务需求接口针对入参和返回值做了RSA AES加密
需求大概是这样下面看下代码实现逻辑

实现

在网络框架的配置类里添加加密拦截器

 HttpsUtils.SSLParams sslParams = HttpsUtils.getSslSocketFactory();OkHttpClient.Builder mOkHttpBuilder = new OkHttpClient.Builder().connectTimeout(CONN_TIME_OUT, TimeUnit.SECONDS).readTimeout(READ_TIME_OUT, TimeUnit.SECONDS).writeTimeout(WRITE_TIME_OUT, TimeUnit.SECONDS).sslSocketFactory(sslParams.sSLSocketFactory, sslParams.trustManager).addInterceptor(new EncryptionInterceptor()) //加密拦截器 统一处理

解析

我的业务场景是前期的 登陆 发验证码 认证 接口不需要做加密
所以我需要在加密拦截器前期做单独处理

 		 //认证接口不处理加密需求if (url.encodedPath().equals("xxx/auth")) {return chain.proceed(request);}//登陆和验证码都是get接口所以在这里统一拦截 if (method.equals("get") || method.equals("delete")) {return chain.proceed(request);}

处理完特殊业务场景就剩统一的post接口参数统一封装成body

 		 //请求接口请求参数String param = InterceptorUtils.bodyToString(request);//获取加密的keyString aesKey = Hawk.get(AppCode.AES_EKY);String encryptData = AESUtils.encrypt(param, aesKey);//拿到加密后的json字符串String json = new Gson().toJson(new JsonRequest(encryptData));RequestBody body = RequestBody.create(request.body().contentType(), json);request = request.newBuilder().post(body).build();Response response = chain.proceed(request);

下图是加密后的参入统一用data作为加密key-value的key用于后端解析

再来看一下返回值解密的代码实现这里有2个点需要注意一下
对于后端返回的类型无非是对象Object或者数组Array 2种情况统一封装
先来看一下返回的加密格式

 {"code":20000,"data":"N1bBAjZ4m6PGGWJmu53PzSOcyjjUL0Jo3UITcEgmxYWcnBZSXKXRK81bS65JVoB8ouAuBLSSQvzVxHAc/pRbdUentgpppoe8wfhKvLuVu9LhVPK9y6I9/rf5nNm4h0+R62ubdUNINLsi6tl+j/Gn/gMPAzIoEFtVyQMQvHJ1sH4uh4as0Tnxu51aEknNc8Pm","errorId":"","message":"操作成功"}

上图中，data是我们的业务返回数据它可能是Array也可能是Object
encryptData 加密字符串

	//说明是数组if (encryptData != null && encryptData.startsWith("[")) {JSONArray jsonArray = JSONArray.parseArray(encryptData);decryptObj.setData(jsonArray);} else if (encryptData != null && encryptData.startsWith("{")) {//说明是对象JSONObject jsonObject = JSONObject.parseObject(encryptData);decryptObj.setData(jsonObject);}

EncryptionInterceptor 实现

public class EncryptionInterceptor implements Interceptor {@Overridepublic Response intercept(Chain chain) throws IOException {Request request = chain.request();okhttp3.HttpUrl url = request.url();String method = request.method().toLowerCase().trim();//认证接口不处理加密需求if (url.encodedPath().equals("/isp/app/worker/auth")) {return chain.proceed(request);}if (method.equals("get") || method.equals("delete")) {return chain.proceed(request);}//请求接口请求参数String param = InterceptorUtils.bodyToString(request);//获取加密的keyString aesKey = Hawk.get(AppCode.AES_EKY);String encryptData = AESUtils.encrypt(param, aesKey);//拿到加密后的json字符串String json = new Gson().toJson(new JsonRequest(encryptData));RequestBody body = RequestBody.create(request.body().contentType(), json);request = request.newBuilder().post(body).build();Response response = chain.proceed(request);return Decrypt(response);}/*** 返回值解密* @param response 返回值* @return response*/private Response Decrypt(Response response) {try {Response.Builder builder = response.newBuilder();Response clone = builder.build();//成功 判断是否等于200if (clone.code() != 200) {return response;}ResponseBody body = clone.body();if (body != null) {MediaType mediaType = body.contentType();if (mediaType != null) {if (InterceptorUtils.isText(mediaType)) {String aesKey = Hawk.get(AppCode.AES_EKY);BaseResult result = new Gson().fromJson(body.string(),BaseResult.class);String encryptData = AESUtils.decrypt(result.getData().toString(), aesKey);ALog.e("解密返回数据 ->" + encryptData);BaseResult decryptObj = new BaseResult();decryptObj.setCode(result.getCode());decryptObj.setErrorId(result.getErrorId());decryptObj.setMessage(result.getMessage());//说明是数组if (encryptData != null && encryptData.startsWith("[")) {JSONArray jsonArray = JSONArray.parseArray(encryptData);decryptObj.setData(jsonArray);} else if (encryptData != null && encryptData.startsWith("{")) {//说明是对象JSONObject jsonObject = JSONObject.parseObject(encryptData);decryptObj.setData(jsonObject);}String strJson = new Gson().toJson(decryptObj);body = ResponseBody.create(mediaType, strJson);return response.newBuilder().body(body).build();}}}} catch (Exception e) {ALog.e("解密错误:" + e.getMessage());}return response;}
}