[Bug]: firebase functions `Context is not finalized`

[ShaMan123]

I am trying to use hono with firebase functions without success.
Getting Context is not finalized

Server

import { getRequestListener } from "@hono/node-server";
import { onRequest } from "firebase-functions/https";
import { Hono } from "hono";

app.post("/endpoint", (c) => c.json({ ok: true, endpoint: true }));

app.post("*", (c) => c.json({ ok: true }));

app.notFound((c) => {
  console.log("notFound", c.req.url);
  return c.json({ ok: false, url: c.req.url });
});

app.onError((error, c) => {
  console.log("onError", error);
  return c.json({ ok: false, url: c.req.url, error: error.message });
});

export const api = onRequest(getRequestListener(app.fetch));

Client

      const endPoint = "/api/endpoint";
      const res = await fetch(endPoint, {
        method: "POST",
        headers: {
          "content-type": "application/json",
        },
      });
      console.log(await res.json());

firebase.json

{
  "hosting": {
    "public": "dist",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "predeploy": ["npm test", "npm run build"],
    "rewrites": [
      {
        "source": "/api{,/**}",
        "function": "api"
      },
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  },
  "functions": [
    {
      "source": "functions",
      "codebase": "default",
      "disallowLegacyRuntimeConfig": true,
      "ignore": [
        "node_modules",
        ".git",
        "firebase-debug.log",
        "firebase-debug.*.log",
        "*.local"
      ],
      "predeploy": [
        "npm --prefix \"$RESOURCE_DIR\" run lint",
        "npm --prefix \"$RESOURCE_DIR\" run build"
      ]
    }
  ],
  "emulators": {
    "auth": {
      "port": 9099
    },
    "functions": {
      "port": 5001,
      "region": "us-central1"
    },
    "firestore": {
      "port": 8080
    },
    "hosting": {
      "port": 5002
    },
    "ui": {
      "enabled": true
    },
    "singleProjectMode": true
  }
}

Error

>  onError Error: Context is not finalized. Did you forget to return a Response object or `await next()`?
>      at /Users/shaman123/DEV/rakto/functions/node_modules/hono/dist/cjs/hono-base.js:325:17
>      at process.processTicksAndRejections (node:internal/process/task_queues:103:5)
>      at async responseViaResponseObject (/Users/shaman123/DEV/rakto/functions/node_modules/@hono/node-server/dist/index.js:441:13)
>      at async /Users/shaman123/DEV/rakto/functions/node_modules/@hono/node-server/dist/index.js:580:14
>      at async /Users/shaman123/DEV/rakto/functions/node_modules/firebase-functions/lib/common/providers/https.js:566:4
>      at async runFunction (/Users/shaman123/.nvm/versions/node/v24.12.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:399:9)
>      at async runHTTPS (/Users/shaman123/.nvm/versions/node/v24.12.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:424:5)
>      at async /Users/shaman123/.nvm/versions/node/v24.12.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:585:21

[ShaMan123]

It would be great if there would be a firebase page in the third parties section in the docs.

[ShaMan123]

I do know that firebase parse the body so anything else should access req.rawBody

[yusukebe]

Hi @ShaMan123

I'm not familar at firebase functtions. I've never used it, and there is no plan to use it. So I can't reproduce it. We have to wait for someone's help...