I have an observable, does an http get in the middle of processing other observables. In the case of the http get response code of anything but 200, I want to take note of this error but proceed to the next observable.
So far I have this:
this.getConfigurationSettings()
.do(config => {
console.log('configuration settings.: ', config);
this.configSettings = config;
this.subscriptionService.setWSAddressProvider('badUrl');
})
.switchMap(config => this.askForWSData())
.do(config =>
console.log('askForWSData' + config))
.switchMap(r => this.processWSData())
.subscribe(
config => {
console.log('start of data processing: ' + config);
},
err => {
// Log errors if any
console.log(err);
},
() => console.log('app exiting'));
and the observable that can return an http error code is the following:
setWSAddressProvider() : Observable<string[]> {
return this.http.get('badUrl')
.map((res:Response) => {
this.address = res.text();
return [res.text()];
});
// .catch((error:any) =>
// Observable.throw('Server error')
// );
}
the above case generate a 400 response code. I want to log that return but go on to other observables. How to do that?
You can use catch to handle http errors
setWSAddressProvider() : Observable<string[]> {
return this.http.get('badUrl')
.map((res:Response) => {
this.address = res.text();
return [res.text()];
});
.catch((error: Response | any) => {
if (error instanceof Response) {
if (error.status === 400) {
console.log("Server responded with 400");
// Create a new observable with the data for the rest of the chain
return Observable.of([]);
}
}
// Re-throw unhandled error
return Observable.throw(err);
});
}
Try using the Observable onErrorResumeNext function:
setWSAddressProvider() : Observable<string[]> {
return this.http.get('badUrl')
.map((res:Response) => {
this.address = res.text();
return [res.text()];
})
.onErrorResumeNext((error: Response | any) => {
if (error instanceof Response) {
if (error.status === 400) {
console.log("Server responded with 400");
}
return [];
}
});
}
and this answer: Difference between catch and onErrorResumeNext