PDF Shadow File

PDF Shadow File

• is a tar.gz that contains a tar'ed and compressed set of files
• each file is a "shadow" of a PDF file in the S3 bucket
• the timestamp of the "shadow" is the timestamp of the file in S3
• the "shadow" file contains either
  • a) ASCII/utf8 numbers 0-9, representing the number of bytes in the PDF file
  • b) an ASCII/utf8 string starting FAILED:, representing that the generation of the PDF from the EAD has previously failed

┌─────────────────────────────┐ ┌───────────────┐   ┌───────────────┐     ┌─────────────────────────────┐
│       EAD URL on voro       │ │               │   │               │     │          PDF on S3          │
└─────────────────────────────┘ │  figure out   │   │  Create PDF   │     └─────────────────────────────┘
┌─────────────────────────────┐ │     batch     │   │     files     │     ┌─────────────────────────────┐
│     "Shadow File" on S3     │ │               │   │               │     │   new "Shadow File" on S3   │
└─────────────────────────────┘ └───────────────┘   └───────────────┘     └─────────────────────────────┘