36 lines
1.4 KiB
Markdown
36 lines
1.4 KiB
Markdown
# Chat Example
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This directory contains a full stack example of a simple chat webapp using nhooyr.io/websocket.
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```bash
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$ cd examples/chat
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$ go run . localhost:0
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listening on http://127.0.0.1:51055
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```
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Visit the printed URL to submit and view broadcasted messages in a browser.
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## Structure
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The frontend is contained in `index.html`, `index.js` and `index.css`. It sets up the
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DOM with a scrollable div at the top that is populated with new messages as they are broadcast.
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At the bottom it adds a form to submit messages.
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The messages are received via the WebSocket `/subscribe` endpoint and published via
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the HTTP POST `/publish` endpoint. The reason for not publishing messages over the WebSocket
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is so that you can easily publish a message with curl.
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The server portion is `main.go` and `chat.go` and implements serving the static frontend
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assets, the `/subscribe` WebSocket endpoint and the HTTP POST `/publish` endpoint.
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The code is well commented. I would recommend starting in `main.go` and then `chat.go` followed by
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`index.html` and then `index.js`.
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There are two automated tests for the server included in `chat_test.go`. The first is a simple one
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client echo test. It publishes a single message and ensures it's received.
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The second is a complex concurrency test where 10 clients send 128 unique messages
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of max 128 bytes concurrently. The test ensures all messages are seen by every client.
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