Sample
Show that EscapedParams is a lossy type boundary for non-string parameter values.
sha256:3d0675b6b17fc3a0851a743d140748b66264cb9d7734c2f830a1cf91373fb197
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Show that EscapedParams is a lossy type boundary for non-string parameter values. HOW
- Packages
- rack-protection 4.2.1
- Environment
- ruby
- Created
- 2026-08-16T17:42:47Z
Commonly assumed
Parameter values with non-string leaf types should survive a round trip through `EscapedParams` unchanged.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- When a pre-seeded `rack.request.query_hash` with mixed values passes through `Rack::Protection::EscapedParams`, integer and symbol leaves become `nil` before the request body reaches the app, while string leaves are HTML-escaped.
- The original typed values are restored to the app-facing env hash after the middleware chain returns, so the change is not persisted after the request.
Files
- Gemfile
- NOTES.md
- csx.json
- test/contract.rb
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-16 · ed25519:d91480838ac982c9