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fix: next.config.js should use x-forwarded-host to resolve rewrites (#…
…911)
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13 changes: 8 additions & 5 deletions
13
packages/ui/docs-bundle/src/pages/api/fern-docs/robots.txt.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,15 +1,18 @@ | ||
| import { NextRequest, NextResponse } from "next/server"; | ||
| import { getXFernHostEdge } from "../../../utils/xFernHost"; | ||
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| export const runtime = "edge"; | ||
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| export default async function GET(req: NextRequest): Promise<NextResponse> { | ||
| const xFernHost = process.env.NEXT_PUBLIC_DOCS_DOMAIN ?? req.headers.get("x-fern-host") ?? req.nextUrl.host; | ||
| const xFernHost = getXFernHostEdge(req); | ||
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| const hostname = new URL(`https://${xFernHost}`).hostname; // strip basepath | ||
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| if (hostname.includes(".docs.dev.buildwithfern.com") || hostname.includes(".docs.buildwithfern.com")) { | ||
| if ( | ||
| xFernHost.includes(".docs.buildwithfern.com") || | ||
| xFernHost.includes(".docs.dev.buildwithfern.com") || | ||
| xFernHost.includes(".docs.staging.buildwithfern.com") | ||
| ) { | ||
| return new NextResponse("User-Agent: *\nDisallow: /", { status: 200 }); | ||
| } | ||
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| return new NextResponse(`User-Agent: *\nSitemap: https://${hostname}/sitemap.xml`, { status: 200 }); | ||
| return new NextResponse(`User-Agent: *\nSitemap: https://${xFernHost}/sitemap.xml`, { status: 200 }); | ||
| } |
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15 changes: 2 additions & 13 deletions
15
packages/ui/docs-bundle/src/pages/api/fern-docs/sitemap.xml.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| import type { NextApiRequest } from "next"; | ||
| import type { NextRequest } from "next/server"; | ||
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| /** | ||
| * Notes: | ||
| * | ||
| * x-fern-host is always appended to the request header by cloudfront for all *.docs.buildwithfern.com requests. | ||
| * if the request is a rewrite from a custom domain, then x-forwarded-host is appended to the request header. | ||
| * prefer x-forwarded-host over x-fern-host. | ||
| * | ||
| * NEXT_PUBLIC_DOCS_DOMAIN is used for local development only. | ||
| * _fern_docs_preview is used for previewing the docs. | ||
| */ | ||
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| export function getXFernHostEdge(req: NextRequest, useSearchParams = false): string { | ||
| const hosts = [ | ||
| useSearchParams ? req.nextUrl.searchParams.get("host") : undefined, | ||
| process.env.NEXT_PUBLIC_DOCS_DOMAIN, | ||
| req.cookies.get("_fern_docs_preview")?.value, | ||
| req.headers.get("x-forwarded-host"), | ||
| req.headers.get("x-fern-host"), | ||
| req.nextUrl.host, | ||
| ]; | ||
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| for (let host of hosts) { | ||
| host = cleanHost(host); | ||
| if (host != null) { | ||
| return host; | ||
| } | ||
| } | ||
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| throw new Error("Could not determine xFernHost from request."); | ||
| } | ||
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| export function getXFernHostNode(req: NextApiRequest, useSearchParams = false): string { | ||
| const hosts = [ | ||
| useSearchParams ? req.query["host"] : undefined, | ||
| process.env.NEXT_PUBLIC_DOCS_DOMAIN, | ||
| req.cookies["_fern_docs_preview"], | ||
| req.headers["x-forwarded-host"], | ||
| req.headers["x-fern-host"], | ||
| req.headers.host, | ||
| ]; | ||
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| for (let host of hosts) { | ||
| if (Array.isArray(host)) { | ||
| continue; | ||
| } | ||
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| host = cleanHost(host); | ||
| if (host != null) { | ||
| return host; | ||
| } | ||
| } | ||
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| throw new Error("Could not determine xFernHost from request."); | ||
| } | ||
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| export function cleanHost(host: string | null | undefined): string | undefined { | ||
| if (typeof host !== "string") { | ||
| return undefined; | ||
| } | ||
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| host = host.trim(); | ||
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| // host should not be localhost | ||
| if (host.includes("localhost")) { | ||
| return undefined; | ||
| } | ||
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| // host should not be an ip address | ||
| if (host.match(/\d+\.\d+\.\d+\.\d+/)) { | ||
| return undefined; | ||
| } | ||
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| // strip `http://` or `https://` from the host, if present | ||
| if (host.includes("://")) { | ||
| host = host.split("://")[1]; | ||
| } | ||
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| // strip trailing slash from the host, if present | ||
| if (host.endsWith("/")) { | ||
| host = host.slice(0, -1); | ||
| } | ||
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| if (host === "") { | ||
| return undefined; | ||
| } | ||
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| return host; | ||
| } |