All language subtitles for 008 Issuing HTTP Requests_en

In the last section, we imported just the jet function into our Abdah Dart file.

So now we're ready to use that jet function to make a request over to that JSON API endpoint inside

of my FETs image method right here.

I'm going to call get the first argument to the jet function is the URL that we want to make a request

to.

To get that Yoro, I'm going to go back over to my browser where I still have the JSON placeholder type

I code dot com you URL inside of my address bar.

So I'm going to copy this.

You are all right here.

And then I will put it in as the first argument to my get function as a string like so.

Now, if we make a request to photos that's going to retrieve all five thousand photos that are posted

at the CPI and that's definitely not what we want to do.

We only want to get one specific photo at a time.

So to indicate which photo we want, I'm going to put a slash at the very end.

Oops, slash at the very end.

There we go.

And then we'll write out the ID of the photo that we want to fetch.

So chances are that we want to start with the ID of one, because that's the first photo there is inside

this collection.

And then get photo two, three, four, five and so on.

So for that, we can reuse the counter variable that we had previously created.

Remember, we start off counter as zero and then every time a user presses the button, we will increment

that counter variable by one.

So I'm going to use a little bit of string interpolation here and I'll put on counter at the very end.

But you'll notice that any time that counter is initialized inside of our asset class, it starts off

as zero and there is no photo with ID of zero.

If we go back to that photos endpoint, the first photo inside the collection has an idea of one.

So I'm going to make sure that I don't try to get a photo with idea of zero by just incrementing the

counter variable by one right before we make that request.

So we can absolutely increment countered by one by using the syntax right here.

We could also write out simply counter plus plus, which has the same effect, counter plus plus will

increment the counter variable by one.

OK, so that looks pretty good now before we try to test out anything here.

There's one thing I want to remind you about that I very briefly pointed out in the last section, if

we go back over to the documentation for our dysfunction, here is the jet function we pass in the URL

as the first argument.

You'll remember that I mentioned that the jet function returns something called a future.

So we need to have a quick discussion about what a future is, because it's a very important concept

that's going to come up many, many times throughout all the other applications that we're going to

build in this course.

So we'll take a quick break, come back the next section and talk about what a future is.