set default base_path hono /companion + allow to customize it

Dockerfile

@@ -39,10 +39,11 @@ COPY ./config/ /app/config/
 COPY --from=builder /tini /tini
 
 ENV PORT=8282 \
-    HOST=0.0.0.0
+    HOST=0.0.0.0 \
+    SERVER_BASE_URL=/companion
 
 ENV THC_PORT=${PORT} \
-    THC_PATH=/healthz
+    THC_PATH=${SERVER_BASE_URL}/healthz
 
 # Copy passwd file for the non-privileged user from the user-stage
 COPY --from=user-stage /etc/passwd /etc/passwd

config/config.example.toml

@@ -12,6 +12,7 @@
 # [server]
 # port = 8282 # env variable: PORT
 # host = "127.0.0.1" # env variable: HOST
+# base_path = "/companion" # env variable: SERVER_BASE_PATH
 # # secret key needs to be 16 characters long or more
 # secret_key = "CHANGE_ME" # env variable: SERVER_SECRET_KEY
 # verify_requests = false # env variable: SERVER_VERIFY_REQUESTS

src/lib/helpers/config.ts

@@ -5,6 +5,9 @@ export const ConfigSchema = z.object({
     server: z.object({
         port: z.number().default(Number(Deno.env.get("PORT")) || 8282),
         host: z.string().default(Deno.env.get("HOST") || "127.0.0.1"),
+        base_path: z.string().default(
+            Deno.env.get("SERVER_BASE_PATH") || "/companion",
+        ),
         secret_key: z.string().length(16).default(
             Deno.env.get("SERVER_SECRET_KEY") || "",
         ),

src/main.ts

@@ -26,7 +26,7 @@ const { getFetchClient } = await import(getFetchClientLocation);
 declare module "hono" {
     interface ContextVariableMap extends HonoVariables {}
 }
-const app = new Hono();
+const app = new Hono().basePath(config.server.base_path);
 const metrics = config.server.enable_metrics ? new Metrics() : undefined;
 
 let tokenMinter: TokenMinter;
@@ -125,7 +125,16 @@ routes(app, config);
 
 export function run(signal: AbortSignal, port: number, hostname: string) {
     return Deno.serve(
-        { signal: signal, port: port, hostname: hostname },
+        {
+            onListen() {
+                console.log(
+                    `[INFO] Server successfully started at http://${config.server.host}:${config.server.port}${config.server.base_path}`,
+                );
+            },
+            signal: signal,
+            port: port,
+            hostname: hostname,
+        },
         app.fetch,
     );
 }

src/routes/invidious_routes/captions.ts

@@ -64,7 +64,7 @@ captionsHandler.get("/:videoId", async (c) => {
             invidiousAvailableCaptionsArr.push({
                 label: caption_track.name.text || "",
                 languageCode: caption_track.language_code,
-                url: `/api/v1/captions/${videoId}?label=${
+                url: `${config.server.base_path}/api/v1/captions/${videoId}?label=${
                     encodeURIComponent(caption_track.name.text || "")
                 }`,
             });

src/routes/invidious_routes/dashManifest.ts

@@ -93,8 +93,9 @@ dashManifest.get("/:videoId", async (c) => {
                         queryParams.set("enc", "true");
                         queryParams.set("data", encryptedParams);
                     }
-                    dashUrl = (dashUrl.pathname + "?" +
-                        queryParams.toString()) as unknown as URL;
+                    dashUrl =
+                        (config.server.base_path + dashUrl.pathname + "?" +
+                            queryParams.toString()) as unknown as URL;
                     return dashUrl;
                 } else {
                     return dashUrl;

src/routes/invidious_routes/download.ts

@@ -62,7 +62,7 @@ export default function getDownloadHandler(app: Hono) {
 
         if ("label" in downloadWidgetData) {
             return await app.request(
-                `/api/v1/captions/${videoId}?label=${
+                `${config.server.base_path}/api/v1/captions/${videoId}?label=${
                     encodeURIComponent(downloadWidgetData.label)
                 }`,
             );
@@ -84,7 +84,7 @@ export default function getDownloadHandler(app: Hono) {
             urlQueriesForLatestVersion.set("local", "true");
 
             return await app.request(
-                `/latest_version?${urlQueriesForLatestVersion.toString()}`,
+                `${config.server.base_path}/latest_version?${urlQueriesForLatestVersion.toString()}`,
             );
         }
     }

src/routes/invidious_routes/latestVersion.ts

@@ -85,8 +85,10 @@ latestVersion.get("/", async (c) => {
                 queryParams.set("enc", "true");
                 queryParams.set("data", encryptedParams);
             }
-            urlToRedirect = itagUrlParsed.pathname + "?" +
+            urlToRedirect = config.server.base_path + itagUrlParsed.pathname +
+                "?" +
                 queryParams.toString();
+            console.log(urlToRedirect);
         }
 
         if (title) urlToRedirect += `&title=${encodeURIComponent(title)}`;

src/tests/main_test.ts

@@ -1,6 +1,9 @@
 Deno.env.set("SERVER_SECRET_KEY", "aaaaaaaaaaaaaaaa");
 const { run } = await import("../main.ts");
 
+const { parseConfig } = await import("../lib/helpers/config.ts");
+const config = await parseConfig();
+
 import { dashManifest } from "./dashManifest.ts";
 import { youtubePlayer } from "./youtubePlayer.ts";
 import { latestVersion } from "./latestVersion.ts";
@@ -9,14 +12,14 @@ Deno.test({
     name: "Checking if Invidious companion works",
     async fn(t) {
         const controller = new AbortController();
-        const port = 8282;
-        const baseUrl = `http://localhost:${port.toString()}`;
+        const baseUrl =
+            `http://${config.server.host}:${config.server.port.toString()}${config.server.base_path}`;
         const headers = { Authorization: "Bearer aaaaaaaaaaaaaaaa" };
 
         await run(
             controller.signal,
-            port,
-            "localhost",
+            config.server.port,
+            config.server.host,
         );
 
         await t.step(