46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
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package main
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import (
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"net/http"
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"time"
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"github.com/wcharczuk/go-chart"
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)
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func drawChart(res http.ResponseWriter, req *http.Request) {
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start := time.Date(2016, 07, 04, 12, 0, 0, 0, chart.Date.Eastern())
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end := time.Date(2016, 07, 06, 12, 0, 0, 0, chart.Date.Eastern())
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xv := chart.Sequence.MarketHours(start, end, chart.NYSEOpen, chart.NYSEClose, chart.Date.IsNYSEHoliday)
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yv := chart.Sequence.RandomWithAverage(len(xv), 200, 10)
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graph := chart.Chart{
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XAxis: chart.XAxis{
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Style: chart.StyleShow(),
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TickPosition: chart.TickPositionBetweenTicks,
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ValueFormatter: chart.TimeHourValueFormatter,
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Range: &chart.MarketHoursRange{
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MarketOpen: chart.NYSEOpen,
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MarketClose: chart.NYSEClose,
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HolidayProvider: chart.Date.IsNYSEHoliday,
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},
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},
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YAxis: chart.YAxis{
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Style: chart.StyleShow(),
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},
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Series: []chart.Series{
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chart.TimeSeries{
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XValues: xv,
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YValues: yv,
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},
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},
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}
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res.Header().Set("Content-Type", "image/png")
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graph.Render(chart.PNG, res)
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}
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func main() {
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http.HandleFunc("/", drawChart)
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http.ListenAndServe(":8080", nil)
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}
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