Skip to main content

​
module  pixeltable.functions.net

Pixeltable UDF for converting media file URIs to presigned HTTP URLs.

​
udf  presigned_url()

Signature
@pxt.udf
presigned_url(uri: pxt.String, expiration_seconds: pxt.Int) -> pxt.String
Convert a blob storage URI to a presigned HTTP URL for direct access. Generates a time-limited, publicly accessible URL from cloud storage URIs (S3, GCS, Azure, etc.) that can be used to serve media files over HTTP. Note: This function uses presigned URLs from storage providers. Provider-specific limitations apply:
  • Google Cloud Storage: maximum 7-day expiration
  • AWS S3: requires proper region configuration
  • Azure: subject to storage account access policies
Parameters:
  • uri (pxt.String): The media file URI (e.g., s3://bucket/path, gs://bucket/path, azure://container/path)
  • expiration_seconds (pxt.Int): How long the URL remains valid
Returns:
  • pxt.String: A presigned HTTP URL for accessing the file
Examples: Generate a presigned URL for a video column with 1-hour expiration: 
tbl.select(
    original_url=tbl.video.fileurl,
    presigned_url=pxtf.net.presigned_url(tbl.video.fileurl, 3600),
).collect()