【APP逆向11】Android基础

• 1.发送网络请求
  • 基于okhttp3
    • 表单格式

new Thread() {
    @Override
    public void run() {
        OkHttpClient client = new OkHttpClient();
        
        //user=xwl&age=99&size18
        FormBody form = new FormBody.Builder()
                .add("user", dataMap.get("username"))
                .add("pwd", dataMap.get("password"))
                .add("sign", dataMap.get("sign")).build();

        Request req = new Request.Builder().url("http://192.168.0.6:9999/login").post(form).build();
        
        Call call = client.newCall(req);
        try {
            Response res = call.execute();
            ResponseBody body = res.body();
            // 字符串={"status": true, "token": "fffk91234ksdujsdsd", "name": "xwl"}
            String dataString = body.string();

            // Log.e("MDS", "请求成功获取返回值=" + dataString);
        } catch (IOException ex) {
            Log.e("MDS", "网络请求错误");
        }
    }
}.start();

- json格式

new Thread() {
    @Override
    public void run() {
        OkHttpClient client = new OkHttpClient();
			
        // dataMap = {"username":"xwl","password":"123","sign":"用户名和密码的md5值"}
        JSONObject json = new JSONObject(dataMap);
        String jsonString = json.toString();
        
        // RequestBody form = RequestBody.create(MediaType.parse("application/json;charset=utf-8"),jsonString);
         RequestBody form = RequestBody.create(MediaType.parse("application/json;charset=utf-8"),jsonString);

        Request req = new Request.Builder().url("http://192.168.0.6:9999/login").post(form).build();
        Call call = client.newCall(req);
        try {
            Response res = call.execute();
            ResponseBody body = res.body();
            String dataString = body.string();
            Log.i("登录", dataString);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}.start();

- 请求拦截器
  - 假设开发app，发送10个请求，每个请求中需要携带特殊的请求头：xxxx。如是开发会将所有请求公共的操作都放在拦截器里面。

// 创建拦截器
Interceptor interceptor = new Interceptor() {

    @Override
    public Response intercept(Chain chain) throws IOException {

        // 1988812212 + 固定字符串 => md5加密
        Request request = chain.request().newBuilder().addHeader("ts", "1988812212").addHeader("sign", "xxxx").build();

        // 请求前
        Response response = chain.proceed(request);
        // 请求后
        return response;
    }
};

new Thread() {
    @Override
    public void run() {
        // 线程执行的内容
        // user=xxx&pwd=xxx&sign=xxxx
        // OkHttpClient client = new OkHttpClient.Builder().build();
        OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();    //添加拦截器
        FormBody form = new FormBody.Builder()
            .add("user", dataMap.get("username"))
            .add("pwd", dataMap.get("password"))
            .add("sign", dataMap.get("sign")).build();
        Request req = new Request.Builder().url("http://192.168.0.6:9999/login").post(form).build();
        Call call = client.newCall(req);
        try {
            Response res = call.execute();
            ResponseBody body = res.body();
            String dataString = body.string();
            Log.e("请求发送成功", dataString);

        } catch (IOException ex) {
            Log.e("Main", "网络请求异常");
        }
    }
}.start();

• 基于retrofit
  • 内部封装了okhttp，让你用的更加的简单
  • 接口声明网络请求

public interface HttpReq {
	
    // 向/api/v1/post 发送POST请求  name=xx&pwd=xxx
    @POST("/api/v1/post")
    @FormUrlEncoded
    Call<ResponseBody> postLogin(@Field("name") String userName, @Field("pwd") String password);
    
    // ->/api/v2/xxx?age=999
    @GET("/api/v2/xxx")
    Call<ResponseBody> getInfo(@Query("age") String age);
		
    // 向/post/users 发送POST请求 {name:xxxx,age:123}
    @POST("/post/users")
    Call<ResponseBody> postLoginJson(@Body RequestBody body);

    @GET("/index")
    Call<ResponseBody> getIndex(@Query("age") String age);
}

- 发送请求

//表单格式
new Thread() {
    @Override
    public void run() {
        Retrofit retrofit = new Retrofit.Builder().baseUrl("https://www.httpbin.org/").build();
        HttpRequest httpRequest = retrofit.create(HttpRequest.class);		
		
        // https://www.httpbin.org/api/v1/post  
        // name=xx&pwd=xxx
        Call<ResponseBody> call = httpRequest.postLogin("wupeiqi", "666");
        try {
            ResponseBody responseBody = call.execute().body();
            String responseString = responseBody.string();
            Log.i("登录", responseString);

        } catch (Exception e) {
            e.printStackTrace();
        }
  }
}.start();


//json格式
new Thread() {
    @Override
    public void run() {
        Retrofit retrofit = new Retrofit.Builder().baseUrl("https://www.httpbin.org/").build();
        HttpRequest httpRequest = retrofit.create(HttpRequest.class);

        JSONObject json = new JSONObject(dataMap);
        String jsonString = json.toString();
        RequestBody form = RequestBody.create(MediaType.parse("application/json;charset=utf-8"),jsonString);
		
        // https://www.httpbin.org/post/users  
        // {username:"root",password:"123","sign":"xxxxdfsdfsdfsdfdfd"}
        Call<ResponseBody> call = httpRequest.postLoginJson(form);
        try {
            ResponseBody responseBody = call.execute().body();
            String responseString = responseBody.string();
            Log.i("登录", responseString);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}.start();

• 2.序列化与反序列化
  • Gson组件，implementation 'com.google.code.gson:gson:2.8.6'

//2.1序列化，对象--->>字符串
class HttpContext{
    public int code;
    public String message;
    
    public HttpContext(int code,String msg){
        this.code = code;
        this.message = msg;
    }
}

HttpContext obj = new HttpContext(1000,"成功");

# json.dumps
String dataString = new Gson().toJson(obj); // '{"code":1000,"Message":"成功"}'

//2.2反序列化，字符串 -> 对象
// JSON格式
String dataString = "{\"status\": true, \"token\": \"fffk91234ksd\", \"name\": \"xwl\"}";
    
class HttpResponse{
    public boolean status;
    public String token;
    public String name;
}

HttpResponse obj = new Gson().fromJson(dataString,HttpResponse.class);
obj.status
obj.name
obj.token

• 3.保存到xml文件
  • 手机上APP产生数据的路径：/data/data/包名/...
  • 手机上APP安装包的位置：/data/app/包名
  • 有时候，APP启动或者运行过程中会保存一些数据到特殊的xml文件中，方便后续读取或者权限检测。 /data/data/com.nb.s6day10/shared_prefs/sp_city.xml

//保存
SharedPreferences sp = getSharedPreferences("sp_city", MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putString("token","111111");
editor.commit();

//删除
SharedPreferences sp = getSharedPreferences("sp_city", MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.remove("token");
editor.commit();

//获取
SharedPreferences sp = getSharedPreferences("sp_city", MODE_PRIVATE);
String token = sp.getString("token","");