问题内容
我有一个正在构建的应用程序，并且一年内没有更改登录代码，更新后我的 flutter 登录页面将请求 OPTIONS 并且 go API 服务器返回 200。以前，服务器中没有出现 OPTIONS 日志。这种情况发生在开发和生产中。我的 Linux 客户端登录正常。
我在这里进行了 CORS 更改，但没有效果。 GET 请求工作正常，但从来没有 POST 请求到达服务器。
这是我的错误：
这是我的服务器端代码。
这是我的颤振登录信息：
我的登录页面
正确答案
根据
的文档Access-Control-Allow-Origin
源响应应该是单个 URL（即请求者）或单个字符
。
尝试改变：
至
ClientException: XMLHttpRequest error., uri=https://api.mydomain.com/loginr := chi.NewRouter()
r.Use(middleware.RequestID)
r.Use(middleware.Logger)
r.Use(middleware.Recoverer)
r.Use(middleware.URLFormat)
r.Use(render.SetContentType(render.ContentTypeJSON))
r.Use(cors.Handler(cors.Options{
AllowedOrigins: []string{"https://*, http://*"},
AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
AllowedHeaders: []string{"Accept", "Origin", "Authorization", "Content-Type", "X-CSRF-Token", "X-Requested-With"},
ExposedHeaders: []string{"Link"},
AllowCredentials: false,
MaxAge: 300, // Maximum value not ignored by any of major browsers
}))Future login(String email, String password, String fcmToken) async {
try {
var response = await http.post(
Uri.parse("$_baseUrl/login"),
headers: {
'Content-Type': 'application/json; charset=UTF-8',
},
body: jsonEncode(
{
'business_email': email,
'password': password,
'token': fcmToken,
},
),
);
if (response.statusCode == 200) {
String jwt = response.body;
await storage.write(key: 'jwt', value: jwt);
return true;
}
} catch (e) {
logger.d(e);
return false;
}
return false;
} class Login extends StatefulWidget {
const Login({
Key? key,
}) : super(key: key);
@override
State createState() => _LoginState();
}
class _LoginState extends State {
@override
void initState() {
WidgetsBinding.instance.addPostFrameCallback(
(_) => showSnackBar(context),
);
super.initState();
}
final GlobalKey _formKey = GlobalKey();
final FocusNode _focusNodePassword = FocusNode();
final TextEditingController _controllerUserEmail = TextEditingController();
final TextEditingController _controllerPassword = TextEditingController();
bool _obscurePassword = true;
bool isLoading = false;
String? fcmToken = '';
@override
Widget build(BuildContext context) {
var model = LoginModel(
authenticationService: Provider.of(context, listen: false),
);
return Scaffold(
body: Form(
key: _formKey,
child: SingleChildScrollView(
padding: const EdgeInsets.all(30.0),
child: Column(
children: [
const SizedBox(
height: 20,
),
SizedBox(
//height: 20,
width: double.infinity,
child: Text(
'exactCASE',
textAlign: TextAlign.center,
style: Theme.of(context).textTheme.headlineLarge,
)),
const SizedBox(height: 30),
isLoading
? const Center(child: CircularProgressIndicator())
: Text(
'Login to your account',
style: Theme.of(context).textTheme.labelMedium,
),
const SizedBox(height: 20),
TextFormField(
controller: _controllerUserEmail,
keyboardType: TextInputType.name,
decoration: InputDecoration(
labelText: 'Email',
prefixIcon: const Icon(Icons.person_outline),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
),
onEditingComplete: () => _focusNodePassword.requestFocus(),
validator: (String? value) {
if (value == null || value.isEmpty) {
return "Please enter your email";
}
return null;
},
),
const SizedBox(height: 10),
TextFormField(
controller: _controllerPassword,
focusNode: _focusNodePassword,
obscureText: _obscurePassword,
keyboardType: TextInputType.visiblePassword,
decoration: InputDecoration(
labelText: "Password",
prefixIcon: const Icon(Icons.password_outlined),
suffixIcon: IconButton(
onPressed: () {
setState(() {
_obscurePassword = !_obscurePassword;
});
},
icon: _obscurePassword
? const Icon(Icons.visibility_outlined)
: const Icon(Icons.visibility_off_outlined)),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
),
validator: (String? value) {
if (value == null || value.isEmpty) {
return "Please enter password.";
}
return null;
},
),
const SizedBox(height: 30),
Column(
children: [
FilledButton(
style: FilledButton.styleFrom(
minimumSize: const Size.fromHeight(50),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20),
),
),
onPressed: () {
if (_formKey.currentState?.validate() ?? false) {
_login(context, model, _controllerUserEmail.text,
_controllerPassword.text);
}
},
child: const Text("Login"),
),
],
),
],
),
),
),
);
}
@override
void dispose() {
_focusNodePassword.dispose();
_controllerUserEmail.dispose();
_controllerPassword.dispose();
super.dispose();
}
Future _login(BuildContext context, LoginModel model, String email,
String password) async {
final navigator = Navigator.of(context);
if (defaultTargetPlatform != TargetPlatform.linux &&
defaultTargetPlatform != TargetPlatform.windows) {
fcmToken = await FirebaseMessaging.instance.getToken();
}
setState(
() {
isLoading = true;
},
);
fcmToken ??= '';
var loginSuccess = await model.login(email, password, fcmToken!);
if (loginSuccess) {
navigator.pushNamed(RoutePaths.homeTabs);
} else {
setState(
() {
isLoading = false;
final snackBar = SnackBar(
content: const Text('Login Failed!'),
action: SnackBarAction(
label: 'OK',
onPressed: () {},
));
ScaffoldMessenger.of(context).showSnackBar(snackBar);
},
);
}
}
} *AllowedOrigins: []string{"https://*, http://*"},AllowedOrigins: []string{"*"},