我已经在Angular 6应用程序中创建了全局错误处理程序:
主要错误处理程序方法:
handleError(error: Error | HttpErrorResponse) {
const router = this.injector.get(Router);
const notificationService = this.injector.get(NotificationsService);
this._logger(error);
if (!navigator.onLine) {
notificationService.displayNotification('error', 'timespan', {heading: 'Internet connection lost!', body: ''});
} else if (error instanceof HttpErrorResponse) {
notificationService.displayNotification('error', 'click', this._httpErrorMessage(error));
} else {
// CLIENT error
router.navigate(['/error-page']);
}
}
问题: 解析器中正在执行许多HTTP服务调用:
resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<ClientDetailsModel> {
if (route.params.cif) {
const reqBody = new GetClientDetailsRequestModel({cif: route.params.cif, idWewPrac: this.userContext.getUserSKP()});
return this.clientsService.getClientDetails(reqBody)
.pipe(
map((clientDetails: { customerDetails: ClientDetailsModel }) => {
if (clientDetails.customerDetails) {
return clientDetails.customerDetails;
}
return null;
})
);
}
如果在此类调用中发生Http错误,则我的全局错误处理程序收到的错误将形成为包装在Error(错误消息为HttpErrorResponse)中的HttpErrorResponse:
Uncaught (in promise): HttpErrorResponse: {"headers":{"normalizedNames":{},"lazyUpdate":null},"status":400,"statusText":"OK","url":"https://...
如果Http错误发生在解析程序之外,则全局错误处理程序可以很好地工作。
要达到我的目标(从解析器中抛出HttpErrorResponse),我需要指定处理订阅中错误回调中错误的方法,但我不能这样做,因为解析器是管理订阅的人。
是否可以指定解析器应如何处理错误?
我想避免手动解析这些包裹的错误。
答案 0 :(得分:0)
我正在寻找解决方案,但只能创建一个工作回合。
这将检查HttpErrorResponse文本,并尝试将JSON解析为实际的错误对象。
一点都不好,但是总比没有好。
handleError(error: any): void {
console.error('Errorhandler catched error: ' + error.message, error);
// We need to have this little hack in oder to access the real error object
// The Angular resolver / promise wraps the error into the message, serialized as json.
// So we extract this error again.
// But first lets check if we actually dealing with an HttpErrorResponse ...
if (error.message.search('HttpErrorResponse: ')) {
// The error includes an HTTPErrorResponse, so we try to parse it's values ...
const regex = new RegExp('^.*HttpErrorResponse:\\s(\\{.*\\})$');
const matches = regex.exec(error.message);
if (matches !== null) {
// matches the regex, convert...
const httpErrorResponse = JSON.parse(matches[1]); // This is now the real error object with all the fields
this.handleHttpErrorResponse(httpErrorResponse);
} else {
// It contains HttpErrorResponse, but no JSON part...
this.toastr.error('There was an unknown communication error',
'Communication error',
{timeOut: 10000});
}
} else {
this.toastr.error('Unknown error occured',
'Well that should not happen. Check the log for more information...',
{timeOut: 10000});
}
}