Getting CloudKit CKAsset URL? - ios

Question

I'd like to share a CloudKit asset in the public database with people who aren't using my app. From the CKAsset class, there's only a fileURL property, which points to a local file, so no URL given.
On the documentation for CloudKit Web Services, however, there is a "referencing existing assets" request, which in its' response gives a downloadURL to the asset file.
Calling this from my app gives me a 421 status code, which is described in documentation as "AUTHENTICATION_REQUIRED", as it requires a ckSession parameter to be given, which is a "session identifier of an authenticated user". It also passes a redirectURL, where a user can type in their iCloud login, and then be re-directed back to the web application, now with a session identifier.
Opening this URL inside the app didn't immediately return the session identifier, but instead expected the user to go through the login process in a browser, before receiving their session ID.
This seems totally off-track, and the wrong thing to be doing. I'm certainly not going to make my users log in to iCloud through a web interface. The only thing missing for that CloudKit Web Services url is the session ID. Is there a way for me to get that using the CloudKit framework? Or is there another way for me to find out this file's URL?

Answer 1

If you are using Apple's official CloudKit.js, here is the code to configure your CloudKit access:
window.addEventListener('cloudkitloaded', function() {
console.log('Cloudkit loaded');
CloudKit.configure({
locale: 'en-us',
containers: [{
containerIdentifier: 'iCloud.com.getYoursInXcode',
apiTokenAuth: {
apiToken: 'getThisInCloudkitDashboardApiAccess',
persist: true //Set cookie
},
environment: 'production'
}]
});
// Do your thing here
})
If you are fetching records in your backend, it is still better to get your API token instead of using the Server-To-Server process.
For example, query records in GO, to fetch a record, compose your request body like this
sampleRequest = []byte('{
"resultsLimit":"4",
"desiredKeys": ["recordTitle","recordDescription"],
"query": {
"recordType": "myRecord",
"sortBy": {
"fieldName": "rank",
"ascending": true
}
}
}')
And send it to the following Url
http.NewRequest("POST", ""https://api.apple-cloudkit.com/database/1/iCloud.com.yourIdentifier/production/public/records/query?ckAPIToken=YOURTOKEN", bytes.NewBuffer(RequestBody))