webcounter

README

Webcounter challenge

This project is based on https://github.com/SDGophers/2015-04-challenge and currently handles:

• initial challenge phase
• extra-credit of supporting multiple image types based on the request suffix (.txt/.jpg/.gif/.png)
• 1,000 visitor level of per-referer counts

The main logic is exposed as a library github.com/billhathaway/webcounter

There is an executable available under the 'server' directory, which will run on port 8080 by default.

Startup is a little slow (3-5 secs) since per the challenge guidelines, it fetches the source image for the glyphs from the challenge's GH repo.

Running

go get github.com/billhathaway/webcounter/wcserver

wcserver // listening on port 8080 by default

hit server at http://localhost:8080/someid.png and refresh your browser a bunch and watch the count go up

Microbenchmarks

Made using wrk against server running on localhost, iMac Mid-2011 (3.1Ghz Core i5), GOMAXPROCS=4

Request Type	Rate/sec
.txt	74555
.jpg	480
.png	267
.gif	55

Testing

go test -v

Documentation

Index

• type Controller
  • func New() (*Controller, error)
  • func (c *Controller) Delete(id string)
  • func (c *Controller) Get(id string, referer string) int
  • func (c *Controller) ServeHTTP(w http.ResponseWriter, r *http.Request)

Types

type Controller

type Controller struct {
	sync.Mutex
	// contains filtered or unexported fields
}

Controller provides a web-counter service

func New

func New() (*Controller, error)

New creates a new Controller

func (*Controller) Delete

func (c *Controller) Delete(id string)

Delete resets the count

func (*Controller) Get

func (c *Controller) Get(id string, referer string) int

Get retrieves the count by referrer and increments it by one

func (*Controller) ServeHTTP

func (c *Controller) ServeHTTP(w http.ResponseWriter, r *http.Request)