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WebSocket connection to 'ws://localhost:3000/ws' failed

Tanishq Vyas answered on July 5, 2023 Popularity 8/10 Helpfulness 3/10

answer WebSocket connection to 'ws://localhost:3000/ws' failed

WebSocket connection to 'ws://localhost:3000/ws' failed

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Create React App v5 currently contains many breaking changes and some bugs. There is currently an open issue regarding WebSockets:

https://github.com/facebook/create-react-app/issues/11779


The solution is to set an environment variable on the client service in the docker-compose.yml:

```
  client:
    environment:
      - WDS_SOCKET_PORT=0
```


Then, in the nginx/default.conf change this line:

```
location /sockjs-node {
```

to this

```
location /ws {
```

Here is the full block of code for context:

```
location /ws {
      proxy_pass http://client;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
}
```

Popularity 8/10 Helpfulness 3/10 Language whatever

Source: Grepper

Tags: connection websocket whatever

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Contributed on Jul 05 2023

Tanishq Vyas

0 Answers Avg Quality 2/10

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WebSocket connection to 'ws://localhost:3000/ws' failed

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