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I have tried to use the download functionalities but couldn't make it to work (all the same mentioned error message). I used the fallback scenario and let JQuery to the job and... it works. If you want to read a file with data in it, use it that way:
$.ajax({ url: file._downloadURL, type: 'GET', dataType: 'json', success: function(data) { console.log (data) // Your data from file here }, error: function() { alert ("error"); } });
The key is to use the _downloadURL received by "Kinvey.Files.find(query)". I initially was not aware of that. This usage doesn't collide with CORS.
Regards
Tayger
Hello
I'm running into a CORS error message using Kinvey's HTML/Javascript API on downloading a file (which I need to download because it's a JSON-File). The code is more or less based on samples from here. I have tried both provided ways:
The error message looks in both case similar (message in Safari browser):
[Error] Failed to load resource: Origin https://<mycorrecthomepage> is not allowed by Access-Control-Allow-Origin. (GNZAPYE.txt, line 0)
[Error] XMLHttpRequest cannot load https://storage.googleapis.com/4161a22b4be84bb5b6edf024782ddb8d/94e75273-4f14-493f-ade2-ad6ed4c96fcb/GNZAPYE.txt?GoogleAccessId=558440376631@developer.gserviceaccount.com&Expires=1532658638&Signature=C%2BbRXxJf6jQ99ZXBayLcwnXiRkV1fpCS4NcCOlVITPnmjLmIXTrEIgXqMIjGiNfG1BWOfUY2R38DX7AL84WILeSWs1xK99gfYu4x4RtkUC1JvAQkH1deRJvlcR0Lncms55tIn6P8N%2BlXAgfmJVhwSiReO6lQVvsmkFJwlfTcqww%3D. Origin https://<mycorrecthomepage> is not allowed by Access-Control-Allow-Origin.
Output Chrome browser:
/app/html/#searchmappage:1 Failed to load https://storage.googleapis.com/4161a22b4be84bb5b6edf024782ddb8d/94e75273-4f14-493f-ade2-ad6ed4c96fcb/GNZAPYE.txt?GoogleAccessId=558440376631@developer.gserviceaccount.com&Expires=1532689475&Signature=g1BXo9MnhkyY24%2FmLNNXEG32ArJyYIgtnbdMQXtFOpOXldoMk5zS58EOidQMS9RSoR1bTLMjBmk%2B2EuSed8tXR%2BEH4gKO88C1PUFD%2B5He2sgd8rFQjcn3ncbPo8BmNqS7%2BYOmxbsx5L%2Byj2OWgz4tvawHS6EKAWRlhxgoQk7xZM%3D: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://www.geoneer.me' is therefore not allowed access.
Output Firefox browser:
-> Translation: Reason: CORS header 'Access-Control-Allow-Origin' missing)
So all 3 browsers are telling the same.
Since I'm using Kinvey's functionality I can't control any header settings or anything else allowing me to correct the problem. The Safari browser states my homepage and this confuses me. I'm trying to download the file client-wise, so my mentioned homepage is not involved at all. If you (Kinvey) restricts to download files only by the defined URL (my server) how should I and any other user be allowed to download files from/as client?
If that helps to solve the problem:I am already doing download/uploads from my server (PHP, REST API) that is working well.
If there is something I can do (on client-side), can you please tell me what and where?
Regards