如何从react native to express api中的fetch函数获取post数据?
问题:如何从react native to express api中的fetch函数获取post数据?,express,react-native,Express,React Native,问题: login = async () => { await fetch('http://192.168.1.160:8001/api/login', { method: 'POST', mode: 'cors', cache: 'default', header: { 'Accept': 'application/json', 'Content-Ty
login = async () => {
await fetch('http://192.168.1.160:8001/api/login', {
method: 'POST',
mode: 'cors',
cache: 'default',
header: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: this.state.email,
password: this.state.password
})
})
.then ((response) => response.json())
.then ((res) => {//console.log(res);
if(res.error === false){
AsyncStorage.setItem('user', res.data);
this.props.navigation.navigate('profile');
} else{
// alert(res.message);
}
})
}
如何从react native to express api中的fetch函数获取post数据
面临的问题:
login = async () => {
await fetch('http://192.168.1.160:8001/api/login', {
method: 'POST',
mode: 'cors',
cache: 'default',
header: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: this.state.email,
password: this.state.password
})
})
.then ((response) => response.json())
.then ((res) => {//console.log(res);
if(res.error === false){
AsyncStorage.setItem('user', res.data);
this.props.navigation.navigate('profile');
} else{
// alert(res.message);
}
})
}
我尝试了以下过程,但在后端API中没有这些变量
如何在后端API中实现这些变量?非常感谢您的任何建议
以下是被动本机获取函数:
反应本机获取函数:
login = async () => {
await fetch('http://192.168.1.160:8001/api/login', {
method: 'POST',
mode: 'cors',
cache: 'default',
header: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: this.state.email,
password: this.state.password
})
})
.then ((response) => response.json())
.then ((res) => {//console.log(res);
if(res.error === false){
AsyncStorage.setItem('user', res.data);
this.props.navigation.navigate('profile');
} else{
// alert(res.message);
}
})
}
Express API:
login = async () => {
await fetch('http://192.168.1.160:8001/api/login', {
method: 'POST',
mode: 'cors',
cache: 'default',
header: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: this.state.email,
password: this.state.password
})
})
.then ((response) => response.json())
.then ((res) => {//console.log(res);
if(res.error === false){
AsyncStorage.setItem('user', res.data);
this.props.navigation.navigate('profile');
} else{
// alert(res.message);
}
})
}
下面给出了express API:
module.exports = function (req, res) {
console.log('TEST',req.body);
let { email, password } = req.body;
let input = { email, password };
const validator = loginValidator(input);
if (validator.error) {
return res.status(400).json({
error: true,
message: validator.error.details,
});
} else {
models.users.findOne({
where: { email: email }
}).then(user => {
if (!user) {
return res.status(400).json({
error: true,
message: {
key: 'email',
text: MessageHelper.email_already_exist
}
});
} else if (!bcrypt.compareSync(password, user.password)) {
return res.status(400).json({
error: true,
message: {
key: 'password',
text: MessageHelper.password_not_valid
}
});
} else {
var token = jwt.sign({ userid: user.id },Config.get('jwt.privatekey'));
models.users.update({ token: token },{ where: { id: user.id } }).then(function(result){
return res.json({
error: false,
message: MessageHelper.user_token_updated,
token: token,
data: {
user_id: user.id,
firstname: user.firstname,
lastname: user.lastname,
username:user.username,
email: user.email,
mobile: user.mobile,
token: user.token
}
});
}).catch(function(error){
return res.status(400).json({
error: true,
message: error
});
})
}
});
}
}
Fetch还接受一个可选的第二个参数,该参数允许您
自定义HTTP请求。您可能需要指定其他选项
标题,或发出POST请求:
联网本质上是一种异步操作。获取方法将
返回一个承诺,使编写
以异步方式工作: