2013-09-05 00:55:21 +08:00
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package main
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import (
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"net/http"
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"path/filepath"
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2022-08-31 12:49:25 +08:00
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"strings"
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2013-09-05 00:55:21 +08:00
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"text/template"
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)
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const html = `{{define "T"}}
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<!doctype html>
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<html>
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<head>
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<script>
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{{.Chartjs}}
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</script>
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<meta name = "viewport" content = "initial-scale = 1, user-scalable = no">
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<style>
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canvas{
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2013-09-05 00:55:21 +08:00
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}
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</style>
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</head>
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<body>
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<div style="padding-top:30px;">
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By <a href="http://www.bigendian123.com/skoo.html" target="_blank">skoo</a>
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</div>
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<div style="padding-top:30px;"></div>
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{{.Canvas}}
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<script>
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{{.JsonCode}}
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{{.NewChart}}
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</script>
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</body>
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</html>
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{{end}}
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`
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type ChartIf interface {
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Canvas(string, int, int) string
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JsonCode(*ChartDataType) (string, error)
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NewChart(string) string
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}
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var ChartHandlers = make(map[string]ChartIf)
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func handler(w http.ResponseWriter, r *http.Request) {
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urls := strings.Split(r.URL.String(), "/")
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if 2 > len(urls) {
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w.Write([]byte("RouteError"))
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return
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}
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file := urls[1] + ".chart"
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file = filepath.Join(ChartDir, file)
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datas, err := ParseDataFile(file)
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if err != nil {
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w.Write([]byte(err.Error()))
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return
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}
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if len(datas) == 0 {
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return
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}
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c := datas[0]
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var chart ChartIf
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var Args = map[string]string{
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"Chartjs": Chartjs,
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}
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if prop, err := c.Prop(); err != nil {
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w.Write([]byte(err.Error()))
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return
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} else {
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var ok bool
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chart, ok = ChartHandlers[prop.Type]
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if !ok {
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w.Write([]byte(err.Error()))
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return
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}
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canvas := chart.Canvas("line", prop.Height, prop.Width)
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Args["Canvas"] = canvas
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newChart := chart.NewChart("line")
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Args["NewChart"] = newChart
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if json, err := chart.JsonCode(c); err != nil {
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w.Write([]byte(err.Error()))
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return
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} else {
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Args["JsonCode"] = json
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}
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}
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2013-09-05 15:54:13 +08:00
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if t, err := template.New("foo").Parse(html); err != nil {
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w.Write([]byte(err.Error()))
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2013-09-05 15:54:13 +08:00
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} else {
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if err = t.ExecuteTemplate(w, "T", Args); err != nil {
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w.Write([]byte(err.Error()))
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}
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2013-09-05 00:55:21 +08:00
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}
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}
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func ListenAndServe(addr string) error {
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http.HandleFunc("/", handler)
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http.HandleFunc("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {})
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2013-09-05 00:55:21 +08:00
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return http.ListenAndServe(addr, nil)
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}
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