Converting Stripe API syntax to Google Apps Script - google-apps-script

Question

This SO answer correctly explains that since the require Node/JS library is not supported by Google Apps Script, the following code changes must be made to get Stripe to work properly in a GAS project:
from
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');
(async () => {
const product = await stripe.products.create({
name: 'My SaaS Platform',
type: 'service',
});
})();
to
function myFunction() {
var url = "https://api.stripe.com/v1/products";
var params = {
method: "post",
headers: {Authorization: "Basic " + Utilities.base64Encode("sk_test_4eC39HqLyjWDarjtT1zdp7dc:")},
payload: {name: "My SaaS Platform", type: "service"}
};
var res = UrlFetchApp.fetch(url, params);
Logger.log(res.getContentText())
}
Now, I want to convert the following code into the Google Apps Script friendly version.
from https://stripe.com/docs/payments/checkout/accept-a-payment#create-checkout-session
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card', 'ideal'],
line_items: [{
price_data: {
currency: 'eur',
product_data: {
name: 'T-shirt',
},
unit_amount: 2000,
},
quantity: 1,
}],
mode: 'payment',
success_url: 'https://example.com/success?session_id={CHECKOUT_SESSION_ID}',
cancel_url: 'https://example.com/cancel',
});
So, I'm trying the following.
to
function myFunction() {
var url = "https://api.stripe.com/v1/checkout/sessions";
var params = {
method: "post",
headers: {
Authorization:
"Basic " + Utilities.base64Encode("sk_test_4eC39HqLyjWDarjtT1zdp7dc:"),
},
payload: {
payment_method_types: ["card", "ideal"],
line_items: [
{
price_data: {
currency: "eur",
product_data: {
name: "T-shirt",
},
unit_amount: 2000,
},
quantity: 1,
},
],
mode: "payment",
success_url:
"https://example.com/success?session_id={CHECKOUT_SESSION_ID}",
cancel_url: "https://example.com/cancel",
},
};
var res = UrlFetchApp.fetch(url, params);
Logger.log(res.getContentText());
}
However, instead of getting the expected response object returned, I get the following error:
Exception: Request failed for https://api.stripe.com returned code 400. Truncated server response:
Log.error
{
error: {
message: "Invalid array",
param: "line_items",
type: "invalid_request_error",
},
}
What am I doing wrong? And how can I generalize the first example? What is the specific documentation I need that I'm not seeing?
Edit:
After stringifying the payload per the suggestion from the comments, now I get the following error:
Exception: Request failed for https://api.stripe.com returned code 400. Truncated server response:
Log.error
{
"error": {
"code": "parameter_unknown",
"doc_url": "https://stripe.com/docs/error-codes/parameter-unknown",
"message": "Received unknown parameter: {\"payment_method_types\":. Did you mean payment_method_types?",
"param": "{\"payment_method_types\":",
"type": "invalid_request_error"
}
}

Answer 1

I modified the script mentioned in the comments and now have a one that works for this purpose.
// [ BEGIN ] utilities library
/**
* Returns encoded form suitable for HTTP POST: x-www-urlformencoded
* #see code: https://gist.github.com/lastguest/1fd181a9c9db0550a847
* #see context: https://stackoverflow.com/a/63024022
* #param { Object } element a data object needing to be encoded
* #param { String } key not necessary for initial call, but used for recursive call
* #param { Object } result recursively populated return object
* #returns { Object } a stringified object
* #example
* `{
"cancel_url": "https://example.com/cancel",
"line_items[0][price_data][currency]": "eur",
"line_items[0][price_data][product_data][name]": "T-shirt",
"line_items[0][price_data][unit_amount]": "2000",
"line_items[0][quantity]": "1",
"mode": "payment",
"payment_method_types[0]": "card",
"payment_method_types[1]": "ideal",
"success_url": "https://example.com/success?session_id={CHECKOUT_SESSION_ID}"
}`
*/
const json2urlEncoded = ( element, key, result={}, ) => {
const OBJECT = 'object';
const typeOfElement = typeof( element );
if( typeOfElement === OBJECT ){
for ( const index in element ) {
const elementParam = element[ index ];
const keyParam = key ? `${ key }[${ index }]` : index;
json2urlEncoded( elementParam, keyParam, result, );
}
} else {
result[ key ] = element.toString();
}
return result;
}
// // test
// const json2urlEncoded_test = () => {
// const data = {
// time : +new Date,
// users : [
// { id: 100 , name: 'Alice' , } ,
// { id: 200 , name: 'Bob' , } ,
// { id: 300 , name: 'Charlie' , } ,
// ],
// };
// const test = json2urlEncoded( data, );
// // Logger.log( 'test\n%s', test, );
// return test;
// // Output:
// // users[0][id]=100&users[0][name]=Stefano&users[1][id]=200&users[1][name]=Lucia&users[2][id]=300&users[2][name]=Franco&time=1405014230183
// }
// // quokka
// const test = json2urlEncoded_test();
// const typeOfTest = typeof test;
// typeOfTest
// test
// [ END ] utilities library

Answer 2

From this question and this sample script, I thought that in this case, the values are required to be sent as the form data. So how about the following modification?
Modified script:
function myFunction() {
var url = "https://httpbin.org/anything";
var params = {
method: "post",
headers: {Authorization: "Basic " + Utilities.base64Encode("sk_test_4eC39HqLyjWDarjtT1zdp7dc:")},
payload: {
"cancel_url": "https://example.com/cancel",
"line_items[0][price_data][currency]": "eur",
"line_items[0][price_data][product_data][name]": "T-shirt",
"line_items[0][price_data][unit_amount]": "2000",
"line_items[0][quantity]": "1",
"mode": "payment",
"payment_method_types[0]": "card",
"payment_method_types[1]": "ideal",
"success_url": "https://example.com/success?session_id={CHECKOUT_SESSION_ID}"
}
};
var res = UrlFetchApp.fetch(url, params);
Logger.log(res.getContentText()); // or console.log(res.getContentText())
}
I think that point might be payment_method_types: ["card", "ideal"] is required to be sent as "payment_method_types[0]": "card" and "payment_method_types[1]": "ideal".
References:
Create a Session of official document
How to integrate Stripe payments with Google Apps Script