Waymark / Routes / aws-s3 Generate an S3 presigned upload URL and use it from a browser
domain: aws-s3 · 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps Server: s3.getSignedUrl/createPresignedPost for PutObject with Key, ContentType, short Expires Return URL to browser Browser: PUT the file with the EXACT same Content-Type header that was signed Verify with HEAD object Known gotchas Any header included in the signature (Content-Type, x-amz-*) must match byte-for-byte on upload or you get SignatureDoesNotMatch Bucket CORS must allow PUT from your origin and expose ETag if you read it Presigned URLs are capped by the signing credential's lifetime — URLs from temporary STS creds die when the session does, regardless of Expires
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