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我有一個同步操作在RxJS observables訂閱鏈的某處運行。同步操作問題RxJS observables訂閱
這個同步操作設置了爲了執行http調用(異步/可觀察)而需要進一步向下鏈的本地存儲(同步)數據。
下面是該序列的摘要:
- 異步操作返回一個可觀察到的所謂
- 同步操作設置在本地存儲器上的數據 使用本地存儲的日期和返回一個可觀察到的
- 異步操作最終認購
當時3.被調用,看起來數據在本地存儲上不可用 - 應該已經設置爲2.
以上只是對問題的簡化。
以下是完整的代碼(在打字稿):從SessionService
resetPassword(passwordResetForm) {
return this.http.put(this.urls.USER_ACCOUNT.RESET_PASSWORD, passwordResetForm);
}
:
這是通過一個形式(位於一個組件)稱爲:
resetPassword() {
this.submitted = true;
if (this.passwordResetForm.valid) {
this.route.params.map(params => params['userAccountToken'])
.switchMap(userAccountToken => {
return Observable.concat(
this.userAccountService.resetPassword(Object.assign(this.passwordResetForm.value.passwordReset, {token: userAccountToken})),
this.sessionService.signinByUserAccountToken(userAccountToken)
);
})
//Will require the UserAccountResolve below which will itself fail because 'x-auth-token' is not yet available on local storage
.subscribe(() => this.router.navigate(['/dashboard']));
}
}
從UserAccountService :
signinByUserAccountToken(userAccountToken: string) {
return this.http.post(format(this.urls.AUTHENTICATION.SIGNIN_BY_USER_ACCOUNT_TOKEN, {userAccountToken}), null)
.do(response => this.setPersonalInfo(response.headers.get('x-auth-token')));
}
private setPersonalInfo(sessionToken) {
localStorage.setItem('authenticated', 'true');
localStorage.setItem('sessionToken', sessionToken);
this.authenticated$.next(true);
}
UserAccountResolve:
import {Injectable} from '@angular/core';
import {Resolve, ActivatedRouteSnapshot} from '@angular/router';
import {UserAccount} from '../shared/models/useraccount.model';
import {AuthenticatedHttpClient} from '../shared/services/authenticated-http-client.service';
import {URLS} from '../urls/URLS';
@Injectable()
export class UserAccountResolve implements Resolve<UserAccount> {
private urls;
constructor(private authenticatedHttpClient: AuthenticatedHttpClient) {
this.urls = URLS;
}
resolve(route: ActivatedRouteSnapshot) {
//Will fail
return this.authenticatedHttpClient.get(this.urls.USER_ACCOUNT.USER_ACCOUNT)
.map(response => response.json());
}
}
AuthenticatedHttpClient:
@Injectable()
export class AuthenticatedHttpClient {
static createAuthorizationHeader(headers: Headers) {
//Is not available on local storage when required
headers.append('x-auth-token', localStorage.getItem('sessionToken'));
}
constructor(private http: Http) {
}
get(url) {
let headers = new Headers();
AuthenticatedHttpClient.createAuthorizationHeader(headers);
return this.http.get(url, {
headers: headers
});
}
...
是否有人可以幫忙嗎?