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server.go
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server.go
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// Copyright © 2017 Toomore Chiang
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package cmd
import (
"encoding/json"
"fmt"
"log"
"net/http"
"strconv"
"time"
"github.com/spf13/cobra"
"github.com/DoubleChuang/gogrs/tradingdays"
)
// Log is show viwer log.
func Log(req *http.Request) {
var userIP string
if userIP = req.Header.Get("X-FORWARDED-FOR"); userIP == "" {
userIP = req.RemoteAddr
}
log.Println(req.URL, userIP, req.UserAgent(), req.Form, req.Referer())
}
// Home is home page.
func Home(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Write([]byte("查詢台灣股市是否開市<br>"))
w.Write([]byte(fmt.Sprintf("<a href=\"/open?q=%d\">範例</a><br>", time.Now().Unix())))
w.Write([]byte("[<a href=\"https://godoc.org/github.com/DoubleChuang/gogrs/tradingdays\">Docs</a>] [<a href=\"https://github.com/DoubleChuang/gogrs/blob/master/cmd/tradingdays_server/main.go\">github</a>]<br>"))
Log(req)
}
type tradeJSON struct {
Date time.Time `json:"date"`
Open bool `json:"open"`
}
type errorJSON struct {
Error string `json:"error"`
}
// TradeOpen is "./open" page.
func TradeOpen(w http.ResponseWriter, req *http.Request) {
var jsonStr []byte
if data, err := strconv.ParseInt(req.FormValue("q"), 10, 64); err != nil {
jsonStr, _ = json.Marshal(&errorJSON{Error: "Wrong date format"})
} else {
if csvcachetime.InCache(*defaultttl) != true {
tradingdays.DownloadCSV(true)
csvcachetime.Set()
log.Println("DownloadCSV.")
}
date := time.Unix(data, 0)
jsonStr, _ = json.Marshal(&tradeJSON{
Date: date.UTC(),
Open: tradingdays.IsOpen(date.Year(), date.Month(), date.Day())})
}
w.Header().Set("Content-Type", "application/json")
w.Write(jsonStr)
Log(req)
}
type cachetime struct {
timestamp int64
}
func (c *cachetime) Set() {
c.timestamp = time.Now().Unix()
}
func (c *cachetime) InCache(seconds int64) bool {
result := (time.Now().Unix() - c.timestamp) <= seconds
if result != true {
c.timestamp = 0
}
return result
}
var (
csvcachetime cachetime
httpport *string
defaultttl *int64
)
// serverCmd represents the server command
var serverCmd = &cobra.Command{
Use: "server",
Short: "run tradingdays server",
Long: `run tradingdays server`,
PersistentPreRun: func(cmd *cobra.Command, args []string) {
tradingdays.DownloadCSV(true)
log.Println("Init DownloadCSV.")
csvcachetime.Set()
},
Run: func(cmd *cobra.Command, args []string) {
log.Println("http:", *httpport, "CSVCacheTime:", *defaultttl)
http.HandleFunc("/", Home)
http.HandleFunc("/open", TradeOpen)
log.Fatal(http.ListenAndServe(*httpport, nil))
},
}
func init() {
httpport = serverCmd.Flags().StringP("port", "p", ":59123", "HTTP Port")
defaultttl = serverCmd.Flags().Int64P("ttl", "t", 21600, "Cache time")
RootCmd.AddCommand(serverCmd)
// Here you will define your flags and configuration settings.
// Cobra supports Persistent Flags which will work for this command
// and all subcommands, e.g.:
// serverCmd.PersistentFlags().String("foo", "", "A help for foo")
// Cobra supports local flags which will only run when this command
// is called directly, e.g.:
// serverCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}