package main import ( "log" "net/http" "github.com/wcharczuk/go-chart" ) func drawChart(res http.ResponseWriter, req *http.Request) { println("drawing scatter plot") graph := chart.Chart{ Series: []chart.Series{ chart.ContinuousSeries{ Style: chart.Style{ Show: true, StrokeWidth: chart.Disabled, DotWidth: 3, }, XValues: chart.Sequence.Random(32, 1024), YValues: chart.Sequence.Random(32, 1024), }, }, } res.Header().Set("Content-Type", "image/png") err := graph.Render(chart.PNG, res) if err != nil { log.Println(err.Error()) } } func main() { http.HandleFunc("/", drawChart) log.Fatal(http.ListenAndServe(":8080", nil)) }