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1.3 KiB
1.3 KiB
FreePort
Get a free open TCP port that is ready to use.
Command Line Example:
# Ask the kernel to give us an open port.
export port=$(freeport)
# Start standalone httpd server for testing
httpd -X -c "Listen $port" &
# Curl local server on the selected port
curl localhost:$port
Golang example:
package main
import "github.com/phayes/freeport"
func main() {
port, err := freeport.GetFreePort()
if err != nil {
log.Fatal(err)
}
// port is ready to listen on
}
Installation
CentOS and other RPM based systems
wget https://github.com/phayes/freeport/releases/download/0.1.2/freeport_0.1.2_linux_386.rpm
rpm -Uvh freeport_0.1.2_linux_386.rpm
Ubuntu and other DEB based systems
wget wget https://github.com/phayes/freeport/releases/download/0.1.2/freeport_0.1.2_linux_amd64.deb
dpkg -i freeport_0.1.2_linux_amd64.deb
Building From Source
sudo apt-get install golang # Download go. Alternativly build from source: https://golang.org/doc/install/source
mkdir ~/.gopath && export GOPATH=~/.gopath # Replace with desired GOPATH
export PATH=$PATH:$GOPATH/bin # For convenience, add go's bin dir to your PATH
go get github.com/phayes/freeport/cmd/freeport