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[feature] Use X-Robots-Tag headers to instruct scrapers/crawlers (#3737)
* [feature] Use `X-Robots-Tag` headers to instruct scrapers/crawlers * use switch for RobotsHeaders
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15 changed files with 311 additions and 142 deletions
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// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package web
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import (
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"net/http"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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)
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const (
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robotsPath = "/robots.txt"
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robotsMetaAllowSome = "nofollow, noarchive, nositelinkssearchbox, max-image-preview:standard" // https://developers.google.com/search/docs/crawling-indexing/robots-meta-tag#robotsmeta
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robotsTxt = `# GoToSocial robots.txt -- to edit, see internal/web/robots.go
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# More info @ https://developers.google.com/search/docs/crawling-indexing/robots/intro
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# AI scrapers and the like.
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# https://github.com/ai-robots-txt/ai.robots.txt/
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User-agent: AI2Bot
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User-agent: Ai2Bot-Dolma
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User-agent: Amazonbot
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User-agent: anthropic-ai
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User-agent: Applebot
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User-agent: Applebot-Extended
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User-agent: Bytespider
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User-agent: CCBot
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User-agent: ChatGPT-User
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User-agent: ClaudeBot
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User-agent: Claude-Web
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User-agent: cohere-ai
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User-agent: cohere-training-data-crawler
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User-agent: Diffbot
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User-agent: DuckAssistBot
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User-agent: FacebookBot
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User-agent: FriendlyCrawler
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User-agent: Google-Extended
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User-agent: GoogleOther
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User-agent: GoogleOther-Image
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User-agent: GoogleOther-Video
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User-agent: GPTBot
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User-agent: iaskspider/2.0
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User-agent: ICC-Crawler
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User-agent: ImagesiftBot
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User-agent: img2dataset
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User-agent: ISSCyberRiskCrawler
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User-agent: Kangaroo Bot
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User-agent: Meta-ExternalAgent
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User-agent: Meta-ExternalFetcher
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User-agent: OAI-SearchBot
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User-agent: omgili
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User-agent: omgilibot
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User-agent: PanguBot
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User-agent: PerplexityBot
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User-agent: PetalBot
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User-agent: Scrapy
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User-agent: Sidetrade indexer bot
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User-agent: Timpibot
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User-agent: VelenPublicWebCrawler
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User-agent: Webzio-Extended
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User-agent: YouBot
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Disallow: /
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# Marketing/SEO "intelligence" data scrapers
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User-agent: AwarioRssBot
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User-agent: AwarioSmartBot
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User-agent: DataForSeoBot
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User-agent: magpie-crawler
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User-agent: Meltwater
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User-agent: peer39_crawler
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User-agent: peer39_crawler/1.0
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User-agent: PiplBot
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User-agent: scoop.it
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User-agent: Seekr
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Disallow: /
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# Well-known.dev crawler. Indexes stuff under /.well-known.
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# https://well-known.dev/about/
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User-agent: WellKnownBot
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Disallow: /
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# Rules for everything else.
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User-agent: *
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Crawl-delay: 500
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# API endpoints.
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Disallow: /api/
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# Auth/Sign in endpoints.
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Disallow: /auth/
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Disallow: /oauth/
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Disallow: /check_your_email
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Disallow: /wait_for_approval
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Disallow: /account_disabled
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Disallow: /signup
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# Fileserver/media.
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Disallow: /fileserver/
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# Fedi S2S API endpoints.
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Disallow: /users/
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Disallow: /emoji/
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# Settings panels.
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Disallow: /admin
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Disallow: /user
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Disallow: /settings/
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# Domain blocklist.
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Disallow: /about/suspended
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# Webfinger endpoint.
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Disallow: /.well-known/webfinger
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`
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robotsTxtNoNodeInfo = robotsTxt + `
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# Disallow nodeinfo
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Disallow: /.well-known/nodeinfo
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Disallow: /nodeinfo/
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`
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)
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// robotsGETHandler returns a decent robots.txt that prevents crawling
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// the api, auth pages, settings pages, etc.
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//
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// More granular robots meta tags are then applied for web pages
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// depending on user preferences (see internal/web).
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func (m *Module) robotsGETHandler(c *gin.Context) {
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// Allow caching for 24 hrs.
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// https://www.rfc-editor.org/rfc/rfc9309.html#section-2.4
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c.Header("Cache-Control", "public, max-age=86400")
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if config.GetInstanceStatsMode() == config.InstanceStatsModeServe {
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// Serve robots.txt as-is
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// without forbidding nodeinfo.
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c.String(http.StatusOK, robotsTxt)
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return
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}
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// Disallow scraping nodeinfo.
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c.String(http.StatusOK, robotsTxtNoNodeInfo)
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}
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