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Live Body

It's finally time to end-to-end test our full HTTP request parsing!

Assignment

Again, we already did the hard parts!

Update your application to print the RequestLine and Headers to the console in this format:
```
Request line:
- Method: METHOD
- Target: TARGET
- Version: VERSION
Headers:
- KEY: VALUE
- KEY: VALUE
Body:
BODY_STRING
...
```
Be sure to stringify the body for printing.
Run your tcplistener program again from the root of your project and redirect the output to a temporary file:
```
go run ./cmd/tcplistener | tee /tmp/body.txt
```

In another shell, send this request to it:

curl -X POST http://localhost:42069/coffee \
-H 'Content-Type: application/json' \
-d '{"type": "dark mode", "size": "medium"}'

Kill both programs. Your body.txt file should contain the output of your tcplistener program.

Run and submit the CLI tests.