North Pole provides 2 HTTP end points that except any arbitrary POST data.

/elf is the end point that signs the data with a unix epoch timestamp in milliseconds and a HMAC

/santa is the end point that verifies the values returned by /elf

/santa responds with the age in milliseconds of the data if it is valid, or -1 if it is invalid

/elf request (using curl):

curl "http://localhost:8181/elf/?key=some"%"20unique"%"20key" -H "Origin: http://localhost:8181" -H "Accept-Encoding: gzip, deflate" -H "Accept-Language: en-US,en;q=0.8" -H "Content-Type: application/x-www-form-urlencoded; charset=UTF-8" -H "Accept: text/plain, */*; q=0.01" -H "Referer: http://localhost:8181/static/test.html" -H "Connection: keep-alive" --data "This is some test data" --compressed

/elf response:

{"Hash":"cdX3dqChEMW4mfB-3b1cRiJF9xdRvYwOKx0_9iSAPAg=","Timestamp":1464293266949}

/santa request (using curl):

curl "http://localhost:8181/santa/?key=some"%"20unique"%"20key&timestamp=1464293266949&hash=cdX3dqChEMW4mfB-3b1cRiJF9xdRvYwOKx0_9iSAPAg"%"3D" -H "Origin: http://localhost:8181" -H "Accept-Encoding: gzip, deflate" -H "Accept-Language: en-US,en;q=0.8" -H "Content-Type: application/x-www-form-urlencoded; charset=UTF-8" -H "Accept: text/plain, */*; q=0.01" -H "Referer: http://localhost:8181/static/test.html" -H "Connection: keep-alive" --data "This is some test data" --compressed

/santa response:

3627

Get the source:

go get github.com/sneakybrian/northpole.go

From within the source directory:

go generate

Embeds the contents of the ./static directory into the executable binary

go build

Builds the executable binary

And optionally:

go install

To install to your $GOPATH$\bin directory

The program has a test page available at:

http://localhost:8181/static/test.html

The program also has a configurable port number for the HTTP Server:

NorthPole.Go -port=1234

Would run the web server at:

http://localhost:1234/

Run the program with the -useLocal flag in order to serve the static resources from the file system rather than the embedded resources:

NorthPole.Go -useLocal

This allows you to edit the contents of the ./static folder on-the-fly and be able to refresh the browser to get the updated changes

Uses the excellent esc package for generating the embedded static resources:

https://github.com/mjibson/esc