flutter 网络请求-Dio

get请求

1.get请求不带参数

        [HttpGet]
        public string g1()
        {
            return "abc";
        }

                   () async {
                    try {
                      Response response = await dio.get("https://127.0.0.1:5001/test/g1");
                      print(response.data);
                    } catch (e) {
                      print(e);
                    }
                  }();

2.get请求带参数

        [HttpGet]
        public string g2(int a,string str)
        {
            return a.ToString()+str;
        }

Response response = await dio.get("https://127.0.0.1:5001/test/g2?a=3&str=abc");

或者

Response response = await dio.get("https://127.0.0.1:5001/test/g2",queryParameters: {"a":3,"str":"abc"});

 或者

                  var data={'a':3,'str':'tom'};
                   () async {
                    try {
                      Response response = await dio.get("https://127.0.0.1:5001/test/g2",queryParameters:data);
                      print(response.data);
                    } catch (e) {
                      print("打印:"+e.toString());
                    }
                  }();

3.

        [HttpGet]
        public string g3(Student student)
        {
            return student.name;
        }

传参数时，需要写在body里，get的body不推荐。

Post请求

1.post无参数

        [HttpPost]
        public string p1()
        {
            return "abc";
        }

Response response = await dio.post("https://127.0.0.1:5001/test/p1");

2.一个body参数

        [HttpPost]
        public string p2([FromBody] string str)
        {
            return str;
        }

3.参数是一个类对象

        [HttpPost]
        public string p3([FromBody] Student student)
        {
            return student.name;
        }

Response response = await dio.post("https://127.0.0.1:5001/test/p3",data: {"age":3,"name":"tom"});

4.参数是一个数组

        [HttpPost]
        public string p4(string[] arr)
        {
            string str = "";
            foreach (var a in arr)
            {
                str += a;
            }
            return str;
        }

List list=["a","b","c"];

Response response = await dio.post("https://127.0.0.1:5001/test/p4",data: list);

 5. list对象集合

        [HttpPost]
        public string p5(List<Student> list)
        {
            string str = "";
            foreach (var stu in list)
            {
                str += stu.name;
            }
            return str;
        }

String str = '[{"age":18,"name":"tom"},{"age":22,"name":"liu"}]';

Response response = await dio.post("https://127.0.0.1:5001/test/p5", data: str);

6.传对象和参数混合

        [HttpPost]
        public string p6(List<Student> list,string a,string b)
        {
            string str = "";
            foreach (var stu in list)
            {
                str += stu.name;
            }
            return str+a+b;
        }

String str = '[{"age":18,"name":"tom"},{"age":22,"name":"liu"}]';
var str2={"a":"q","b":"w"};

Response response = await dio.post("https://127.0.0.1:5001/test/p6",queryParameters: str2, data: str);

7.表单

        [HttpPost]
        public string p7([FromForm] Student student)
        {
            return student.name;
        }

FormData form=FormData.fromMap({"name": "tom", "age": 25,});

Response response = await dio.post("https://127.0.0.1:5001/test/p7",data:form);

访问https

                  Dio dio=Dio();
                  //使用https，忽略签名
                  (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate  = (client) {
                    client.badCertificateCallback=(X509Certificate cert, String host, int port){
                        return true;
                    };
                  };
                   () async {
                    try {
                      Response response = await dio.get("https://127.0.0.1:5001/test/g1");
                      print(response);
                    } catch (e) {
                      print(e);
                    }
                  }();

加证书

String PEM="XXXXX"; // certificate content
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate  = (client) {
    client.badCertificateCallback=(X509Certificate cert, String host, int port){
        if(cert.pem==PEM){ // Verify the certificate
            return true;
        }
        return false;
    };
};