A basic implementation of a finger server writter with Swift.
This project's original purpose was to test specific usecases in a finger client. As such it's a bit rough and by no means should be used in anything resembling a production environment.
It's not 100% complient with the RFC either. I'm sharing simply as something that will help others learn about the finger protocol or basic TCP connection handling with Swift. I might improve it over time but it's a low priority. Though I'm very happy to take in suggested changes if you want to contribute.
Further information on the finger spec: Finger Protocol RFC
If you would like to get into the finger protocol, you can set up an account at happynetbox.com.
- Get packages
swift package update - Build executable
swift build - The exectuable is found in the
./builddirectory
Optional: You can run swift package generate-xcodeproj to create an xcode project file.
When built, you should end up with a swift-fingerd executable.
You can run ./swift-fingerd --help for a full list of options
sudo ./swift-fingerd -h '0.0.0.0' -p 79 -v -d '~/my-user-dir'
Some test users are provided in the project's testusers directory so you can run:
sudo ./swift-fingerd -d '<project root>/testusers'
then use finger like this:
finger franklindstallone@localhost
Port 79 is a privileged port so you'll likely need to use sudo, even if you run it as swift run, when
using the default port.
You can avoid that by running swift-fingerd like this:
./swift-fingerd -d '~/<project root>/testusers/' --verbose -p 8081
Then use nc to send the request:
printf "franklindstallone\r\n" | nc localhost 8081
You can reference the user data in the project's testusers directory.
Reading user data assumes you have:
- A directory containing text files
- The text files match the filename format
<username>.txt - The contents within
<username>.txtwill be returned as the response. - A missing
<username>.txtwill return a user not found response.