package main import ( "net/http" "github.com/wcharczuk/go-chart" "github.com/wcharczuk/go-chart/drawing" ) func drawChart(res http.ResponseWriter, req *http.Request) { graph := chart.Chart{ Background: chart.Style{ Padding: chart.Box{ Top: 50, Left: 25, Right: 25, Bottom: 10, }, FillColor: drawing.ColorFromHex("efefef"), }, XAxis: chart.XAxis{ Style: chart.Style{ Show: true, }, }, YAxis: chart.YAxis{ Style: chart.Style{ Show: true, }, }, Series: []chart.Series{ chart.ContinuousSeries{ XValues: chart.Seq(1.0, 100.0), YValues: chart.SeqRand(100.0, 256.0), }, }, } res.Header().Set("Content-Type", "image/png") graph.Render(chart.PNG, res) } func drawChartDefault(res http.ResponseWriter, req *http.Request) { graph := chart.Chart{ Background: chart.Style{ FillColor: drawing.ColorFromHex("efefef"), }, XAxis: chart.XAxis{ Style: chart.Style{ Show: true, }, }, YAxis: chart.YAxis{ Style: chart.Style{ Show: true, }, }, Series: []chart.Series{ chart.ContinuousSeries{ XValues: chart.Seq(1.0, 100.0), YValues: chart.SeqRand(100.0, 256.0), }, }, } res.Header().Set("Content-Type", "image/png") graph.Render(chart.PNG, res) } func main() { http.HandleFunc("/", drawChart) http.HandleFunc("/default", drawChartDefault) http.ListenAndServe(":8080", nil) }