[READ-ONLY] Mirror of https://github.com/bombshell-dev/docs. bomb.sh/docs
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960import type { MiddlewareHandler } from "hono";import { prefersMarkdown, toMarkdownPath } from "./negotiate.ts";import { docsOrigin } from "./origin.ts";import { SITE } from "./config.ts";import type { Upstream } from "./upstream.ts";
export const MARKDOWN_404 = `# 404: Not Found
This page does not exist. An index of all Bombshell documentation isavailable at ${SITE}/docs/index.md`;
// Agent-facing markdown: explicit `.md` paths always serve markdown;// extensionless page routes negotiate on `Accept: text/markdown`.// Negotiation rewrites to a distinct origin URL, so HTML and markdown// variants get distinct cache keys — Cloudflare's cache ignores `Vary`.export function markdownNegotiation(upstream: Upstream): MiddlewareHandler { return async (c, next) => { const url = new URL(c.req.url);
// Plenty of agent tooling still probes /llms.txt by convention and // never reads Link headers. /docs/index.md is an llms.txt in all but // name, so alias it. if (url.pathname === "/docs/llms.txt") url.pathname = "/docs/index.md";
const markdownPath = toMarkdownPath(url.pathname); const wantsMarkdown = markdownPath !== null && (url.pathname.endsWith(".md") || prefersMarkdown(c.req.header("Accept") ?? null)); if (!wantsMarkdown || !markdownPath) return next();
const response = await upstream( new URL(markdownPath, docsOrigin(url.host)), ); if (response.status === 404) { return new Response(MARKDOWN_404, { status: 404, headers: { "Content-Type": "text/markdown; charset=utf-8", Vary: "Accept", }, }); } // Other origin errors (500, 502 HTML error pages) pass through // untouched instead of being relabelled as markdown. if (!response.ok) return response;
const headers = new Headers(response.headers); headers.set("Content-Type", "text/markdown; charset=utf-8"); headers.set("Vary", "Accept"); const htmlPath = markdownPath.slice(0, -"index.md".length); headers.set("Link", `<${SITE}${htmlPath}>; rel="canonical"`); return new Response(response.body, { status: response.status, headers, }); };}