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Fix redirects issue #924

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Merged
merged 1 commit into from
Jan 25, 2025
Merged

Fix redirects issue #924

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219 changes: 136 additions & 83 deletions src/middleware.ts
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Original file line number Diff line number Diff line change
@@ -1,88 +1,141 @@
import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'
import docsConfig from '../docs.config.js'

const { updatedRedirectsData } = require('./data/redirects.ts');

function createRedirectUrl(request: NextRequest, destination: string, path: string): string {
// Handle absolute URLs
if (destination.startsWith('http')) {
// Handle dynamic slug replacements
if (destination.includes(':slug')) {
const slugMatch = path.match(/[^/]+$/)
const slug = slugMatch ? slugMatch[0] : ''
destination = destination.replace(':slug*', slug)
}
// Handle version replacements
if (destination.includes(':version')) {
const versionMatch = path.match(/\d+\.\d+/)
const version = versionMatch ? versionMatch[0] : ''
destination = destination.replace(':version', version)
}

return destination
}

// Handle relative paths
const basePath = '/docs'
return destination.startsWith('/') ?
`${request.nextUrl.origin}${basePath}${destination}` :
`${request.nextUrl.origin}${basePath}/${destination}`
}
import type { NextRequest } from 'next/server';
import { NextResponse } from 'next/server';
import docsConfig from '../docs.config.js';

const {updatedRedirectsData} = require('./data/redirects.ts');

function createRedirectUrl(
request: NextRequest,
destination: string,
path: string
): string {
// Handle absolute URLs
if (destination.startsWith('http')) {
// Extract version and full path after version
const versionMatch = path.match(/(?:\/v\/|@)(\d+\.\d+)\/(.*)/);

if (versionMatch) {
const version = versionMatch[1];
const remainingPath = versionMatch[2];

// Find matching redirect for the remaining path
const redirect = updatedRedirectsData.find(
(r: any) =>
r.source === `/${remainingPath}` ||
r.source === remainingPath
);

// If redirect exists, use its destination, otherwise use the remaining path
const finalPath = redirect
? redirect.destination.replace(/^\//, '')
: remainingPath;

// Replace placeholders and construct final URL
return destination
.replace(':version', version)
.replace(':slug*', finalPath);
}

// Handle other cases as before
if (destination.includes(':slug')) {
const slugMatch = path.match(/[^/]+$/);
const slug = slugMatch ? slugMatch[0] : '';
destination = destination.replace(':slug*', slug);
}

return destination;
}

// Handle relative paths
const basePath = '/docs';
return destination.startsWith('/')
? `${request.nextUrl.origin}${basePath}${destination}`
: `${request.nextUrl.origin}${basePath}/${destination}`;
}
export function middleware(request: NextRequest) {
const path = request.nextUrl.pathname
const pathWithoutBase = path.replace('/docs', '')

// Handle base redirects from redirects.ts
const redirect = updatedRedirectsData.find((r: any) => r.source === pathWithoutBase)
if (redirect) {
return NextResponse.redirect(createRedirectUrl(request, redirect.destination, path))
}
// Handle version without slug
const versionOnlyMatch = pathWithoutBase.match(/^\/v\/(\d+\.\d+)$/)
if (versionOnlyMatch) {
return NextResponse.redirect(`https://${versionOnlyMatch[1]}.sourcegraph.com/`)
}
// Handle version-specific redirects
if (pathWithoutBase.startsWith(`/v/${docsConfig.DOCS_LATEST_VERSION}/`)) {
return NextResponse.redirect(createRedirectUrl(
request,
`https://sourcegraph.com/docs/:slug*`,
pathWithoutBase
))
}
if (pathWithoutBase.startsWith(`/@${docsConfig.DOCS_LATEST_VERSION}/`)) {
return NextResponse.redirect(createRedirectUrl(
request,
`https://sourcegraph.com/docs/:slug*`,
pathWithoutBase
))
}
const versionMatch = pathWithoutBase.match(/^\/v\/(\d+\.\d+)\/(.*)/)
if (versionMatch) {
return NextResponse.redirect(createRedirectUrl(
request,
'https://:version.sourcegraph.com/:slug*',
pathWithoutBase
))
}
const atVersionMatch = pathWithoutBase.match(/^\/@(\d+\.\d+)\/(.*)/)
if (atVersionMatch) {
return NextResponse.redirect(createRedirectUrl(
request,
'https://:version.sourcegraph.com/:slug*',
pathWithoutBase
))
}
if (pathWithoutBase === '/changelog.rss')
return NextResponse.redirect(createRedirectUrl(request, '/technical-changelog.rss', path))

return NextResponse.next()
const path = request.nextUrl.pathname;
const pathWithoutBase = path.replace('/docs', '');

// Handle base redirects from redirects.ts
const redirect = updatedRedirectsData.find(
(r: any) => r.source === pathWithoutBase
);
if (redirect) {
return NextResponse.redirect(
createRedirectUrl(request, redirect.destination, path)
);
}

// Handle latest version without path - redirect to main docs
const latestVersionOnlyMatch = pathWithoutBase.match(
`^\/(?:v\/|@)${docsConfig.DOCS_LATEST_VERSION}\/?$`
);
if (latestVersionOnlyMatch) {
return NextResponse.redirect(`https://sourcegraph.com/docs`);
}

// Handle version without slug - both /v/X.Y and @X.Y formats (for non-latest versions)
const versionOnlyMatch = pathWithoutBase.match(
/^\/(?:v\/|@)(\d+\.\d+)\/?$/
);
if (
versionOnlyMatch &&
versionOnlyMatch[1] !== docsConfig.DOCS_LATEST_VERSION
) {
return NextResponse.redirect(
`https://${versionOnlyMatch[1]}.sourcegraph.com/`
);
}

// Handle version-specific redirects
if (pathWithoutBase.startsWith(`/v/${docsConfig.DOCS_LATEST_VERSION}/`)) {
return NextResponse.redirect(
createRedirectUrl(
request,
`https://sourcegraph.com/docs/:slug*`,
pathWithoutBase
)
);
}
if (pathWithoutBase.startsWith(`/@${docsConfig.DOCS_LATEST_VERSION}/`)) {
return NextResponse.redirect(
createRedirectUrl(
request,
`https://sourcegraph.com/docs/:slug*`,
pathWithoutBase
)
);
}
const versionMatch = pathWithoutBase.match(/^\/v\/(\d+\.\d+)\/(.*)/);
if (versionMatch) {
return NextResponse.redirect(
createRedirectUrl(
request,
'https://:version.sourcegraph.com/:slug*',
pathWithoutBase
)
);
}
const atVersionMatch = pathWithoutBase.match(/^\/@(\d+\.\d+)\/(.*)/);

if (atVersionMatch) {
return NextResponse.redirect(
createRedirectUrl(
request,
'https://:version.sourcegraph.com/:slug*',
pathWithoutBase
)
);
}

if (pathWithoutBase === '/changelog.rss')
return NextResponse.redirect(
createRedirectUrl(request, '/technical-changelog.rss', path)
);

return NextResponse.next();
}

export const config = {
matcher: [
'/((?!api|_next/static|_next/image|assets|favicon.ico|sw.js).*)',
],
}
matcher: ['/((?!api|_next/static|_next/image|assets|favicon.ico|sw.js).*)']
};
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