71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package main
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import (
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"log"
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"net/http"
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_ "net/http/pprof"
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"github.com/wcharczuk/go-chart"
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"github.com/wcharczuk/go-chart/drawing"
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)
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func drawChart(res http.ResponseWriter, req *http.Request) {
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viridisByY := func(xr, yr chart.Range, index int, x, y float64) drawing.Color {
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return chart.Viridis(y, yr.GetMin(), yr.GetMax())
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}
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graph := chart.Chart{
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Series: []chart.Series{
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chart.ContinuousSeries{
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Style: chart.Style{
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Show: true,
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StrokeWidth: chart.Disabled,
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DotWidth: 5,
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DotColorProvider: viridisByY,
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},
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XValues: chart.Sequence.Random(128, 1024),
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YValues: chart.Sequence.Random(128, 1024),
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},
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},
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}
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res.Header().Set("Content-Type", chart.ContentTypePNG)
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err := graph.Render(chart.PNG, res)
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if err != nil {
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log.Println(err.Error())
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}
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}
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func unit(res http.ResponseWriter, req *http.Request) {
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graph := chart.Chart{
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Height: 50,
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Width: 50,
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Canvas: chart.Style{
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Padding: chart.Box{IsSet: true},
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},
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Background: chart.Style{
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Padding: chart.Box{IsSet: true},
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},
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Series: []chart.Series{
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chart.ContinuousSeries{
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XValues: chart.Sequence.Float64(0, 4, 1),
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YValues: chart.Sequence.Float64(0, 4, 1),
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},
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},
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}
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res.Header().Set("Content-Type", chart.ContentTypePNG)
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err := graph.Render(chart.PNG, res)
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if err != nil {
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log.Println(err.Error())
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}
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}
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func main() {
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http.HandleFunc("/", drawChart)
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http.HandleFunc("/unit", unit)
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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