Submit Your Feature Requests and Ideas

[sebastianwessel]

If you have ideas, wishes, feature request and feedback - please add them in the comments below

[poef]

Can I also inject javascript objects from the main process into the QuickJS runtime? I'm building a node express based data server, where I want to allow clients to run javascript queries on that data (https://github.com/SimplyEdit/SimplyStore/)

[sebastianwessel]

Hey @poef

Yes, you can. See Data Exchange Between Host and Guest
You can use env, and provide strings, numbers, arrays, objects and functions.

const { evalCode } = await createRuntime({
  env: {
    MY_PROCESS_ENV: 'some environment variable provided by the host',
    KV: {
      set: (key: string, value: string) => keyValueStoreOnHost.set(key, value),
      get: (key: string) => keyValueStoreOnHost.get(key),
    },
  },
})

[guest271314]

Read standard input to V8's d8 (/proc/PID/fd/0) with WebAssembly. Right now I'm using QuickJS via os.system() https://github.com/guest271314/native-messaging-d8/blob/quickjs-stdin-read/nm_d8.js#L16, https://github.com/guest271314/native-messaging-d8/blob/quickjs-stdin-read/read_d8_stdin.js. If we can do this with WebAssembly we can get rid of os.system() which call sh.

[sebastianwessel]

@guest271314 thanks for your feedback. As far as I understand, if the "regular" deadline nodejs module is available inside of the quickjs runtime, it should solve the issue or?
So, the code inside the sandbox would look like this

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});

rl.on('line', (line) => {
    console.log(line);
});

rl.once('close', () => {
     // end of input
 });

[guest271314]

As far as I understand, if the "regular" deadline nodejs module is available inside of the quickjs runtime

Where does Node.js API's get in to your WASM QuickJS build?

The idea is to use the least amount of resources to read d8 shell standard input. QuickJS (quickjs-ng) is around 1.2 MB.

I was thinking I could use WebAssembly/WASI to read stdin to d8 using WebAssembly.compile().

[guest271314]

I'm basically trying to do this https://github.com/guest271314/native-messaging-webassembly without a WASM runtime, using the built-in WebAssembly object alone - within d8. I created a different solution for Mozilla SpiderMonkey.