Fix URLs on GitBook v1

Author: gregberge

packages/gitbook-v2/src/lib/links.ts

@@ -93,6 +93,10 @@ export function createLinker(
         },
 
         toAbsoluteURL(absolutePath: string): string {
+            if (absolutePath.startsWith('http://') || absolutePath.startsWith('https://')) {
+                return absolutePath;
+            }
+
             if (!servedOn.host) {
                 return absolutePath;
             }

packages/gitbook/src/lib/v1.ts

@@ -48,16 +48,21 @@ export async function getV1BaseContext(): Promise<GitBookBaseContext> {
     const host = await getHost();
     const basePath = await getBasePath();
     const siteBasePath = await getSiteBasePath();
+    const protocol = await getProtocol();
 
     const linker = createLinker({
+        protocol,
         host,
         spaceBasePath: basePath,
         siteBasePath: siteBasePath,
     });
 
     // On V1, we use hard-navigation between different spaces because of layout issues
-    linker.toLinkForContent = (url) => {
-        return url;
+    linker.toLinkForContent = (rawURL) => {
+        const urlObject = new URL(rawURL);
+        return linker.toAbsoluteURL(
+            linker.toPathInSite(`${urlObject.pathname}${urlObject.search}`)
+        );
     };
 
     const dataFetcher = getDataFetcherV1();
@@ -66,6 +71,7 @@ export async function getV1BaseContext(): Promise<GitBookBaseContext> {
         imagesContextId: host,
         // In V1, we always resize at the top level of the hostname, not relative to the content.
         linker: createLinker({
+            protocol,
             host,
             spaceBasePath: '/',
             siteBasePath: '/',
@@ -401,6 +407,19 @@ export function getSitePointerFromContext(context: GitBookSiteContext): SiteCont
     };
 }
 
+/**
+ * Return the protocol for the current request.
+ */
+async function getProtocol(): Promise<string> {
+    assertIsNotV2();
+    const headersList = await headers();
+    const protocol = headersList.get('x-forwarded-proto') ?? 'https';
+    if (protocol.endsWith(':')) {
+        return protocol;
+    }
+    return `${protocol}:`;
+}
+
 /**
  * Return the base path for the current request.
  * The value will start and finish with /

packages/gitbook/src/middleware.ts

@@ -156,6 +156,9 @@ export async function middleware(request: NextRequest) {
     if (contextId) {
         headers.set('x-gitbook-token-context', contextId);
     }
+    if (inputURL.protocol === 'http:') {
+        headers.set('x-forwarded-proto', 'http');
+    }
     headers.set('x-gitbook-mode', mode);
     headers.set('x-gitbook-origin-basepath', originBasePath);
     headers.set(