Question

我正在写一个用于酒店注册的应用程序，在这里我要发送如下的发帖请求

checkNetworkConnection仅用于检查设备上是否存在活动连接的ID，如果为true，则我调用 postFormData 方法

Future<dynamic> checkNetworkConnection() async {
    try {
      final result = await InternetAddress.lookup("www.google.com");
      if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
        postFormData().then((val) {
          if (jsonDecode(val.body)[0]["response"] == "false") {
            setState(() {
              isLoading = false;
              //isAbsorbing = false;
            });
            print(val.body);
            print("something went wrong");
            showDialog(
              context: context,
              builder: (_) => new AlertDialog(
                title: Text("hello"),
                content: Text("something went wrong"),
              ),
            );
          } else if (jsonDecode(val.body)[0]["response"] == "true") {
            setState(() {
              isLoading = false;
              //isAbsorbing = false;
            });
            print(val.body);
            print("hotel added successfully");
            showDialog(
                context: context,
                builder: (_) => new AlertDialog(
                      title: Text("Hotel Added Successfully"),
                      content: Text("Hey there! Welcome to j1"),
                    ));
          }
        }).catchError((error) {
          setState(() {
            isLoading = false;
          });
          showDialog(
              context: context,
              builder: (_) {
                return new AlertDialog(
                    title: Text("error!"), content: Text(error.toString()));
              });
        });
      }
    } on SocketException catch (_) {
      setState(() {
        isLoading = false;
      });
      showDialog(
          context: context,
          builder: (_) => new AlertDialog(
                title: Text(
                  "Connection Error !",
                  style: TextStyle(
                      color: Colors.redAccent, fontWeight: FontWeight.bold),
                ),
                content: Text("Check your internet connection !"),
              ));
    }
  }

postFormData方法如下所示

  Future<dynamic> postFormData() async {
      //there are declarations for parent and headers I just excluded them because they were quite a lot ^_^ !
      final response = await http
        .post("https://thej1.app/apiDataReq",
            body: parent, headers: httpHeaders)
        .then((val) => val)
        .timeout(Duration(seconds: 5))
        .catchError((_) {
      setState(() {
        isLoading = false;
      });
      showDialog(
          context: context,
          builder: (_) =>
              new AlertDialog(title: Text("error"), content: Text("error")));
    });
    return response;
  }

还有其他相同的做法吗？和未来的建设者一样？我的响应主体具有一个结构，因此我可以创建响应模型。但是我可以将其隐含在将来的构建器中。此外，我还希望捕获异常和超时错误。

感谢进阶！

在Flutter中写HTTP发布请求的方法

0 个答案: