ReferenceError: self is not defined when trying to call a grpc-web function from a CLI/server application #1130
Description
Hi!
I'm encountering an issue that is probably related to: #728
I'm not sure if this related to grpc-web, but wanted to make sure that the use case is supported. I'm trying to create a server that interacts with another server via grpc-web.
Here's my code:
import express, { Express, Request, Response } from 'express';
import dotenv from 'dotenv';
import * as gauth from 'google-auth-library';
import { MyServiceClient } from '../../src/ui/client/src/proto/my_pb_service';
import * as pb from '../../src/ui/client/src/proto/my_pb';
import { Observable } from 'rxjs';
dotenv.config();
const app: Express = express();
const port = process.env.PORT;
app.get('/', (req: Request, res: Response) => {
var empty: string[];
empty = [];
res.send('Express + TypeScript Server');
console.log("creating client")
let r = new pb.CollectAndScanRequest();
r.setResourceGroupNamesList(empty);
var client = new MyServiceClient('https://my-dev.backend.url/api')
console.log("client created")
client.collectAndScan(r, (err, res) => {
if (err !== null) {
console.error(`collectAndScanAll: ${err}`);
}
if (res === null) {
console.error(`collectAndScanAll: unexpected null response`);
}
console.log(`collectAndScanAll: ${res}`);
});
console.log("Done")
});
app.listen(port, () => {
console.log(`⚡️[server]: Server is running at https://localhost:${port}`);
});
Here's the error I see:
creating client
client created
ReferenceError: self is not defined
at new e (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:16017)
at REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:15931
at REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:15942
at o (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:15312)
at t.makeDefaultTransport (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:15405)
at e.createTransport (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:8356)
at new e (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:7911)
at t.client (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:7619)
at t.unary (REDACTED/src/ui/client/node_modules/@improbable-eng/grpc-web/dist/grpc-web-client.js:1:24075)
at MyServiceClient.collectAndScan (REDACTED/src/ui/client/src/proto/my_pb_service.js:60:21)
Now, I'm new to TS/JS so this error and trace log is not really helpful for me. It could also be related to instantiating the grpc client, but then, I copied this from a working webfrontend code.
Does grpc-web support non browser invocation? Could this be related to webpack config?
Given there is a PR for something similar, how/where would I need to define self?