go-chart/testserver/main.go
Will Charczuk 9a5138b21d ???
2016-07-11 18:48:51 -07:00

89 lines
1.7 KiB
Go

package main
import (
"log"
"math/rand"
"net/http"
"time"
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-web"
)
func chartHandler(rc *web.RequestContext) web.ControllerResult {
rnd := rand.New(rand.NewSource(0))
format, err := rc.RouteParameter("format")
if err != nil {
format = "png"
}
if format == "png" {
rc.Response.Header().Set("Content-Type", "image/png")
} else {
rc.Response.Header().Set("Content-Type", "image/svg+xml")
}
var s1x []time.Time
for x := 0; x < 100; x++ {
s1x = append([]time.Time{time.Now().AddDate(0, 0, -1*x)}, s1x...)
}
var s1y []float64
for x := 0; x < 100; x++ {
s1y = append(s1y, rnd.Float64()*1024)
}
c := chart.Chart{
Title: "A Test Chart",
TitleStyle: chart.Style{
Show: true,
},
Width: 1024,
Height: 400,
XAxis: chart.XAxis{
Style: chart.Style{
Show: true,
},
},
YAxis: chart.YAxis{
Style: chart.Style{
Show: true,
},
Zero: chart.GridLine{
Style: chart.Style{
Show: true,
StrokeWidth: 1.0,
},
},
},
Series: []chart.Series{
chart.TimeSeries{
Name: "a",
XValues: s1x,
YValues: s1y,
},
},
}
if format == "png" {
err = c.Render(chart.PNG, rc.Response)
} else {
err = c.Render(chart.SVG, rc.Response)
}
if err != nil {
return rc.API().InternalError(err)
}
rc.Response.WriteHeader(http.StatusOK)
return nil
}
func main() {
app := web.New()
app.SetName("Chart Test Server")
app.SetLogger(web.NewStandardOutputLogger())
app.GET("/", chartHandler)
app.GET("/format/:format", chartHandler)
app.GET("/favico.ico", func(rc *web.RequestContext) web.ControllerResult {
return rc.Raw([]byte{})
})
log.Fatal(app.Start())
}