也许下面的代码可以按原样工作,但我不确定这是否是正确的实现,以防止运行时出现任何可能的问题。
拥有以下内容:
const ep = `${environment.api.baseUrl}/login`;
return this.http.post<ILoginResponse>(ep, request).pipe(map(req => {
this.storage.set(environment.storage_keys.token, req.access_token).then(() => {
this.authState$.next(true);
});
return req;
})).toPromise();
如果this.storage.set
返回异常或由于任何原因失败,我如何确保toPromise()
将被拒绝?
发布于 2019-06-05 03:22:33
在这种情况下,Map没有任何意义,因为您没有映射任何内容。您可以简单地执行以下操作:
const ep = `${environment.api.baseUrl}/login`;
return this.http.post<ILoginResponse>(ep, request)
.toPromise()
.then(
req => {
this.storage.set(environment.storage_keys.token, req.access_token).then(
() => this.authState$.next(true)
);
return req;
}
)
如果this.storage
失败,这将得到解决。示例:
const promiseError = new Promise(
(resolve, reject) => reject('err')
)
const promiseOk = new Promise(
(resolve, reject) => resolve('ok')
)
promiseOk
.then(
req => {
promiseError
.then(
() => console.log('fa')
)
.catch(
err => console.log('err')
)
return req;
}
)
.then(
req => console.log(req)
)
发布于 2019-06-05 03:16:11
您可以始终使用Promise构造函数而不是toPromise
来创建自己的更细粒度的控件:
const ep = `${environment.api.baseUrl}/login`;
return new Promise((resolve, reject) => {
this.http.post<ILoginResponse>(ep, request).pipe(map(req => {
this.storage.set(environment.storage_keys.token, req.access_token).then(() => {
this.authState$.next(true);
resolve(/* optionally return data here */);
}).catch(e => reject(e));
})).catch(e => reject(e)); // Assuming this.http.post returns a promise
})
https://stackoverflow.com/questions/56449967
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