272. Setting Headers

Jul 21, 2026 06:08 · 3:18 · English · Whisper Turbo · 2 & Kefluniañ

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We now kind of enter the second part of this module,

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you could say.

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Thus far,

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we had a thorough look at how we can send HTTP requests,

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how we can handle errors,

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how we can work with the data we get back if we don't have errors and

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so on.

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Now,

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let me dive into a little bit more advanced parts of the Angular HTTP

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client and how you can configure your requests and which kind of

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different responses you can back and so on.

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Let's start with headers.

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When sending an HTTP request,

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and of course we are configuring our requests in the post service,

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so this is the place to look at now.

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So when configuring these HTTP requests,

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you set things like the URL you sent the request to,

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or in the case of a post request,

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you also set the data you wanna attach to your request.

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Now,

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of course,

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sometimes you also need to set some special headers.

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For example,

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when you have a backend that requires authorization and looks for an authorization

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header,

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or if you wanna set your own content type,

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or you need to attach a custom header because your API,

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you're sending the request to needs it.

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Now,

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setting your own headers is extremely simple.

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Any...

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HTTP request method,

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no matter if it's post or get or delete or patch or whatever,

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any of these methods has an extra

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last argument.

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So in the case of get,

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it's the second argument.

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In the case of post,

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it would be the third argument,

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which is an object where you can configure that request.

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And there you can configure a bunch of stuff,

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as you can see,

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and we'll start with the headers here.

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And headers...

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now takes a headers object,

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which allows you to set the headers you want to send.

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To be precise,

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it's a HTTP headers object,

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which you need to import from at Angular Common

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HTTP.

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So you need to add this import at the top.

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And this allows you to create a new instance of

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this object with a new keyword.

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And to this object,

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you can pass a JavaScript object here with the object literal notation,

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where you can have key value pairs of your headers.

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And headers are,

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of course, key value pairs.

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So for example,

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here, you could set your custom header,

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in case your API would need that,

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to hello.

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Or whatever you need.

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You can set any header,

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any HTTP header pair here.

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If I do this and I save that,

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and I now do try to fetch some posts.

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I fetched posts as before,

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but if we have a look at the network tab,

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let's actually do that again with the cleared network tab,

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and we have a look at our request here,

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if we inspect the headers,

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you see here on the request headers there is this custom header hello

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and that's that custom header i attached and it's as simple as that you

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can add as many headers as you want with this simple approach by

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simply setting the headers config option here to a

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new http headers object to which you pass your headers

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in an object literal with a key value notation

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