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Merged
czj merged 1 commit into from
Nov 6, 2026
+17 −2
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Release 3.1.0 #48

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17 changes: 16 additions & 1 deletion CHANGELOG.md
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Expand Up @@ -2,6 +2,20 @@

## [Unreleased]

## [3.1.0] — 2026-11-06

A Google Cloud VM no longer passes as a verified Googlebot, and a forged Googlebot can no longer stall requests on reverse DNS.

**New**
- `Browser::Bot::IPRanges.dns_cache_size` caches each reverse DNS verdict per owner and IP, failures included, for `dns_cache_ttl` seconds (3,600 by default), so a forged Googlebot pays its DNS wait once per TTL instead of on every request. It is 0, off, by default.
- `dns_timeout` sets the timeout per query and per nameserver, as `Resolv` applies it. Invalid values raise `ArgumentError`.

**Fixed**
- Google's reverse DNS check accepts only `googlebot.com` and `google.com`. Any Google Cloud VM, named under `googleusercontent.com`, passed as a verified Googlebot; Google's user-triggered fetchers are covered by the IP ranges it publishes.
- The DNS timeout drops from 2 seconds to 1, and the forward lookup uses an absolute name, so the resolver never retries it under the search domains of `/etc/resolv.conf`.
- `IPRanges.refresh` and the weekly sync raise `Browser::Error` on anything implausible, and keep the current ranges: a prefix broader than /12 (IPv4) or /24 (IPv6), a private, loopback, link-local, multicast or unspecified range, a malformed document, or a redirect that leaves HTTPS or the owner's host.
- Cloudflare header values over 128 bytes are ignored.

## [3.0.0] — 2026-11-05

The gem is renamed Agentry and lives at levups/agentry; the API is untouched.
Expand Down Expand Up @@ -86,7 +100,8 @@ First release, forked from browser 6.2.0 (`dd88933`). Same API: `gem "agentry"`
- A corpus of 20,328 user agents, with snapshot and diff scripts proving answers match upstream, and a
request benchmark.

[Unreleased]: https://github.com/levups/agentry/compare/v3.0.0...HEAD
[Unreleased]: https://github.com/levups/agentry/compare/v3.1.0...HEAD
[3.1.0]: https://github.com/levups/agentry/compare/v3.0.0...v3.1.0
[3.0.0]: https://github.com/levups/agentry/compare/v2.1.0...v3.0.0
[2.1.0]: https://github.com/levups/agentry/compare/v2.0.0...v2.1.0
[2.0.0]: https://github.com/levups/agentry/compare/v1.0.0...v2.0.0
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2 changes: 1 addition & 1 deletion lib/browser/version.rb
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@@ -1,5 +1,5 @@
# frozen_string_literal: true

module Browser
VERSION = "3.0.0"
VERSION = "3.1.0"
end
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