Arvados

All Arvados components should use a consistent format for Keep locators, and any code that reads or parses locators should recognize any form of a locator (e.g. with size hint, without size hint, with signature, without signature). A component may reject a request if it finds a locator that lacks necessary information (e.g. a missing permission signature), but it should parse them in consistent ways.

A good place to start would be:

[[:xdigit:]]{32}(\+[[:digit:]]+)?(\+A[[:xdigit:]]+@[[:xdigit:]]{8})?

which should match any 32-digit locator with an optional size hint and an optional signature.

• define a Locator type with accessor functions hash, size, signature, timestamp
• Locator.parse parses a locator from a string
• Locator.to_s marshals the locator into an ASCII string (Locator.String() in Go)