Use the unencoded file name instead of the encoded one to submit s3 urls for presigning

(s3 will encode the filename when it performs GetObjectCommand, but filename is already encoded and will be double encoded!)

Author: AdrianCurtin

index.js

@@ -228,10 +228,12 @@ class S3Adapter {
     }
 
     const fileKey = `${this._bucketPrefix}${fileName}`;
+    // For presigned URLs, use the original unencoded filename to prevent double encoding
+    const presignedFileKey = `${this._bucketPrefix}${filename}`;
 
     let presignedUrl = '';
     if (this._presignedUrl) {
-      const params = { Bucket: this._bucket, Key: fileKey };
+      const params = { Bucket: this._bucket, Key: presignedFileKey };
       const options = this._presignedUrlExpires ? { expiresIn: this._presignedUrlExpires } : {};
 
       const command = new GetObjectCommand(params);