Menu
I've generated a presigned S3 POST URL. Using the return parameters, I then pass it into my code, but I keep getting this error Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource..
Whereas on Postman, I'm able to submit the form-data with one attached file.
On PostMan, I manually entered the parameters 
The same parameters are then entered into my code. 
614
A user who does not have AWS credentials or permission to access an S3 object can be granted temporary access by using a presigned URL. A presigned URL is generated by an AWS user who has access to the object. The generated URL is then given to the unauthorized user.
A CORS configuration is a document that defines rules that identify the origins that you will allow to access your bucket, the operations (HTTP methods) supported for each origin, and other operation-specific information. In the S3 console, the CORS configuration must be a JSON document.
Cross-origin resource sharing (CORS) defines a way for client web applications that are loaded in one domain to interact with resources in a different domain. With CORS support, you can build rich client-side web applications with Amazon S3 and selectively allow cross-origin access to your Amazon S3 resources.
You must edit the CORS Configuration to be public , something like:
<?xml version="1.0" encoding="UTF-8"?> <CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <CORSRule> <AllowedOrigin>*</AllowedOrigin> <AllowedMethod>POST</AllowedMethod> <MaxAgeSeconds>3000</MaxAgeSeconds> <AllowedHeader>*</AllowedHeader> </CORSRule> </CORSConfiguration> 
134
Unable to comment so adding this here. Contains Harvey's answer, but in the form of a text to make it easy to copy.
[ { "AllowedHeaders": [ "*" ], "AllowedMethods": [ "GET", "PUT", "POST" ], "AllowedOrigins": [ "*" ], "ExposeHeaders": [] } ] If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
