Marc Mintel
5397309103
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63 lines
2.2 KiB
Plaintext
63 lines
2.2 KiB
Plaintext
# Debug
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Undici (and subsenquently `fetch` and `websocket`) exposes a debug statement that can be enabled by setting `NODE_DEBUG` within the environment.
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The flags available are:
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## `undici`
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This flag enables debug statements for the core undici library.
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```sh
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NODE_DEBUG=undici node script.js
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UNDICI 16241: connecting to nodejs.org using https:h1
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UNDICI 16241: connecting to nodejs.org using https:h1
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UNDICI 16241: connected to nodejs.org using https:h1
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UNDICI 16241: sending request to GET https://nodejs.org/
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UNDICI 16241: received response to GET https://nodejs.org/ - HTTP 307
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UNDICI 16241: connecting to nodejs.org using https:h1
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UNDICI 16241: trailers received from GET https://nodejs.org/
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UNDICI 16241: connected to nodejs.org using https:h1
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UNDICI 16241: sending request to GET https://nodejs.org/en
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UNDICI 16241: received response to GET https://nodejs.org/en - HTTP 200
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UNDICI 16241: trailers received from GET https://nodejs.org/en
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```
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## `fetch`
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This flag enables debug statements for the `fetch` API.
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> **Note**: statements are pretty similar to the ones in the `undici` flag, but scoped to `fetch`
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```sh
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NODE_DEBUG=fetch node script.js
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FETCH 16241: connecting to nodejs.org using https:h1
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FETCH 16241: connecting to nodejs.org using https:h1
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FETCH 16241: connected to nodejs.org using https:h1
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FETCH 16241: sending request to GET https://nodejs.org/
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FETCH 16241: received response to GET https://nodejs.org/ - HTTP 307
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FETCH 16241: connecting to nodejs.org using https:h1
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FETCH 16241: trailers received from GET https://nodejs.org/
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FETCH 16241: connected to nodejs.org using https:h1
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FETCH 16241: sending request to GET https://nodejs.org/en
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FETCH 16241: received response to GET https://nodejs.org/en - HTTP 200
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FETCH 16241: trailers received from GET https://nodejs.org/en
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```
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## `websocket`
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This flag enables debug statements for the `Websocket` API.
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> **Note**: statements can overlap with `UNDICI` ones if `undici` or `fetch` flag has been enabled as well.
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```sh
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NODE_DEBUG=websocket node script.js
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WEBSOCKET 18309: connecting to echo.websocket.org using https:h1
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WEBSOCKET 18309: connected to echo.websocket.org using https:h1
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WEBSOCKET 18309: sending request to GET https://echo.websocket.org/
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WEBSOCKET 18309: connection opened <ip_address>
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```
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