phiredrop | Stripe Developers | Page 1

storm plazaBOT Jan 25, 2023, 4:24 AM

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woeful ridge Jan 25, 2023, 4:25 AM

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hello! can you share your code?

fleet tapir Jan 25, 2023, 4:25 AM

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Sure, there's a lot tho! Which would you like to see first?

woeful ridge Jan 25, 2023, 4:25 AM

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you mentioned during the start of my app during the Stripe init, it fails to retrieve my publishable key. - this section

fleet tapir Jan 25, 2023, 4:26 AM

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Here's the init where the failure comes from:

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      let url = URL(string: BackendUrl + "checkout")!
        print("*** Stripe BackendUrl: \(url) ***")
        var request = URLRequest(url: url)
        request.httpMethod = "GET"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        let task = URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in
            guard let response = response as? HTTPURLResponse,
                response.statusCode == 200,
                let data = data,
                let json = try? JSONSerialization.jsonObject(with: data, options: []) as? [String : Any],
                let publishableKey = json["publishableKey"] as? String else {
                print("Failed to retrieve publishableKey from /config")
                return
            }
            print("Fetched publishable key \(publishableKey)")
            StripeAPI.defaultPublishableKey = publishableKey
        })
        task.resume()
    }```

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the BackendUrl is the Glitch url, so the full url string is the GlitchURL/checkout

woeful ridge Jan 25, 2023, 4:28 AM

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what's the error you're getting?

fleet tapir Jan 25, 2023, 4:29 AM

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The one in the code: Failed to retrieve publishableKey from /config

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that gets printed in my console when starting the app

woeful ridge Jan 25, 2023, 4:30 AM

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have you tried stepping through the lines of code before that also? e.g. have you validated what data you're receiving in the response?

fleet tapir Jan 25, 2023, 4:32 AM

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Which part are you thinking?

woeful ridge Jan 25, 2023, 4:32 AM

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what's in data for example?

fleet tapir Jan 25, 2023, 4:34 AM

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Hmm, how can I test that? It won't let me print it

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This code is taken straight from the sample stripe ios app. The only thing different is the backend url itself

woeful ridge Jan 25, 2023, 4:35 AM

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what do you mean by it won't let you print it?

fleet tapir Jan 25, 2023, 4:36 AM

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I guess I don't know how to answer your question "what's in data"

woeful ridge Jan 25, 2023, 4:37 AM

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can you log data or json?

fleet tapir Jan 25, 2023, 4:41 AM

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print("*** STRIPE DATA: (data) ***")

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returns:

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*** STRIPE DATA: Optional(147 bytes) ***

frosty sequoia Jan 25, 2023, 4:42 AM

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Hi @fleet tapir can you use debugPrint() ?

fleet tapir Jan 25, 2023, 4:43 AM

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Hello, yes it returns the same

frosty sequoia Jan 25, 2023, 4:45 AM

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Can you print the json object instead? so that we can see the unserialized data.

fleet tapir Jan 25, 2023, 4:47 AM

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Having trouble finding where I can put that one...

frosty sequoia Jan 25, 2023, 4:48 AM

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That means the json deserialziation is unsuccessful.

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Can you do a debugPrint(response) after the line response.statusCode ==200 ?

fleet tapir Jan 25, 2023, 4:50 AM

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<NSHTTPURLResponse: 0x60000138c060> { URL: https://snow-unique-fire.glitch.me/checkout } { Status Code: 404, Headers {
    "Content-Length" =     (
        147
    );
    "Content-Type" =     (
        "text/html; charset=utf-8"
    );
    Date =     (
        "Wed, 25 Jan 2023 04:50:31 GMT"
    );
    "content-security-policy" =     (
        "default-src 'none'"
    );
    "x-content-type-options" =     (
        nosniff
    );
    "x-powered-by" =     (
        Express
    );
} }

frosty sequoia Jan 25, 2023, 4:51 AM

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The status code is 404, which means your app is unable to communicate with your server

fleet tapir Jan 25, 2023, 4:52 AM

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Right. Is the url formatted incorrectly? I'm not sure what it should be, the Stripe doc I linked above doesn't specify for testing the Glitch part

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If I remove the /checkout part, it returns:

<NSHTTPURLResponse: 0x6000023abb00> { URL: https://snow-unique-fire.glitch.me/ } { Status Code: 200, Headers {
    "Accept-Ranges" =     (
        bytes
    );
    "Cache-Control" =     (
        "public, max-age=0"
    );
    "Content-Length" =     (
        755
    );
    "Content-Type" =     (
        "text/html; charset=UTF-8"
    );
    Date =     (
        "Wed, 25 Jan 2023 04:53:07 GMT"
    );
    Etag =     (
        "W/\"2f3-183258bbb50\""
    );
    "Last-Modified" =     (
        "Sat, 10 Sep 2022 03:57:38 GMT"
    );
    "x-powered-by" =     (
        Express
    );
} }

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But still prints Failed to retrieve publishableKey

frosty sequoia Jan 25, 2023, 4:55 AM

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OK, I see the problem. You should make a POST request instead of GET.

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request.httpMethod = "POST"

fleet tapir Jan 25, 2023, 4:56 AM

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Hmm, the sample app uses GET : https://github.com/stripe-samples/accept-a-payment/blob/main/custom-payment-flow/client/ios-swiftui/AcceptAPayment/AcceptAPaymentApp.swift

GitHub

accept-a-payment/AcceptAPaymentApp.swift at main · stripe-samples/a...

Learn how to accept a payment from customers around the world with a variety of payment methods. - accept-a-payment/AcceptAPaymentApp.swift at main · stripe-samples/accept-a-payment

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Also, if I change to post I get:

frosty sequoia Jan 25, 2023, 4:58 AM

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But your glithe server accepts POST request. I just sent a POST request to https://snow-unique-fire.glitch.me/checkout and I can see the response successfully.

fleet tapir Jan 25, 2023, 4:59 AM

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Isn't the init trying to retrieve the publishable key from the server though? Rather than post?

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Ah, that might have worked... I put checkout back into the URL...

frosty sequoia Jan 25, 2023, 5:00 AM

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Yes, and I see you changed the url from config to checkout, and therefore the error.

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btw your glitch server doesn't accept a GET config request (https://snow-unique-fire.glitch.me/config)

fleet tapir Jan 25, 2023, 5:01 AM

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Yes, this is retrieving the publishable key now!

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Yeah, that config was from the sample app, but the Glitch server by default creates checkout

frosty sequoia Jan 25, 2023, 5:01 AM

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I'm not sure how you setup the glitch server, but you should follow the instructions here and use the correct server https://github.com/stripe-samples/accept-a-payment/tree/main/custom-payment-flow

GitHub

accept-a-payment/custom-payment-flow at main · stripe-samples/accep...

Learn how to accept a payment from customers around the world with a variety of payment methods. - accept-a-payment/custom-payment-flow at main · stripe-samples/accept-a-payment

fleet tapir Jan 25, 2023, 5:02 AM

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There wasn't any setup to it. I just clicked the link from the Stripe doc I linked above

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I don't know anything about Glitch servers, I assumed it was just temporary testing space. Can I actually use this as my backend?

frosty sequoia Jan 25, 2023, 5:04 AM

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That could an example server for a different integration.

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I'd suggest just follow the information in the same repo (i.e., the link that I sent you earlier).

fleet tapir Jan 25, 2023, 5:06 AM

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Thank you - where would be the easiest/path of least resistance to set that up?

frosty sequoia Jan 25, 2023, 5:09 AM

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https://github.com/stripe-samples/accept-a-payment/ you are already looking at it. This repo contains all the code (backend + frontend) that you need to build your first Stripe integration.

GitHub

GitHub - stripe-samples/accept-a-payment: Learn how to accept a pay...

Learn how to accept a payment from customers around the world with a variety of payment methods. - GitHub - stripe-samples/accept-a-payment: Learn how to accept a payment from customers around the ...

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