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tier_2_allowlist

doiget_core::http

Function tier_2_allowlist 

Source 
pub fn tier_2_allowlist() -> Vec<SourceAllowlist>
Expand description

Hard-coded Phase 4 allowlist for Tier 2 metadata sources (OpenAlex, Semantic Scholar, DOAJ). Sourced from docs/SOURCES.md §1 (the Tier 2 table) and docs/REDIRECT_ALLOWLIST.md §3 (same redirect-allowlist policy as Tier 1, distinct source keys).

Returned hosts:

  • "openalex" → api.openalex.org (production OpenAlex REST API).
  • "semantic_scholar" → api.semanticscholar.org (S2 Graph API base).
  • "doaj" → doaj.org + *.doaj.org (DOAJ public API; wildcard covers api.doaj.org and any v4+ subdomain split).

Per docs/SOURCES.md §4 “OpenAlex / Semantic Scholar / DOAJ”, these sources are metadata-only: their Source::fetch impls MUST return pdf_bytes: None. The redirect closure in HttpClient uses this list to deny redirects to off-list hosts under each Tier 2 source key — identical mechanism to Tier 1, but the per-tool capability gate (profile.metadata.openalex etc.) is layered on top so the network surface remains capability-aware.