278. Response Interceptors

Jul 21, 2026 06:00 · 2:46 · English · Whisper Turbo · 2 דוברים

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אינדקס הרצאה

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You're also not limited to interacting with the request in

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an intersetter.

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You can also interact with the response.

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You do this by adding something here to handle because

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handle actually gives you an observable,

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which I guess makes sense because in the end,

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your request is an observable to which you subscribe in the end.

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So this in the end is the request with the response in

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it, you could say,

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wrapped into an observable.

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And therefore here you can of course add pipe and do something

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with the response if you want to.

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You could add the map operator here to change the response.

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For example,

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of course you should be careful with that and not change it in a way that the rest of your application

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breaks.

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Or what I'll do here,

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You use tab,

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which you need to import from RxJS operators to simply

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look into the response.

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S… Speaker 1 (278. Response Interceptors)

Now here in tab,

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you get an event and that's important.

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S… Speaker 2 (278. Response Interceptors)

You always get events here.

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S… Speaker 2 (278. Response Interceptors)

Remember, I showed you that you can observe different kinds of responses

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with the Angular HTTP client,

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no matter what you chose there,

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here in the intersetter,

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you always get an event so that you have the most granular access

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to the response you could possibly have.

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So here,

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for example, we could check if the event type

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is equal to the HTTP event type,

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which you also need to import,

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of response,

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S… Speaker 2 (278. Response Interceptors)

because here maybe I only care about that response.

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I will log the event before that,

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however, so that we can see all events we got.

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And then in here,

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we could say response

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arrived,

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body data.

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and then simply console .log the event body,

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which here is the response body,

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of course.

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Now here again,

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I'm just doing some logging,

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but as I just mentioned,

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S… Speaker 2 (278. Response Interceptors)

you could use other operators like map here and even transform the response.

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S… Speaker 2 (278. Response Interceptors)

That would be possible.

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So now if we save that and we go back and we have a look at the

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console, we see a bunch of output there.

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S… Speaker 2 (278. Response Interceptors)

Let me clear it to make it a bit easier.

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and fetch posts again.

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And now you see request is on its way.

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Then we have type zero,

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which is this,

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the request is now sent event.

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Then we got the response.

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Therefore,

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we now got that response arrived log.

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And there indeed,

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we now see the response body being logged because that is what I'm doing here.

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So this is possible too.

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S… Speaker 2 (278. Response Interceptors)

You cannot just interact with the request inside of your interest setter.

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You can also interact with the response if you want to.

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S… Speaker 2 (278. Response Interceptors)

You can log it, you can manipulate it, whatever your requirements are.

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