handle_help.go

package main

import (
	"context"
	"net/http"
	"runtime"
	"time"

	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"go.mongodb.org/mongo-driver/mongo/readpref"
)

func handleHelp(w http.ResponseWriter, r *http.Request) {
	token, err := GetTokenFromHeader(w, r)
	if err != nil {
		http.Redirect(w, r, "/signin", http.StatusSeeOther)
		return
	}
	type recipe struct {
		Token
		Adminsetting  Adminsetting
		Sha1ver       string
		BuildTime     string
		NumCPU        int // server CPU 갯수
		MaxProcessNum int // 최대 동시 연산 갯수
		User          User
	}
	rcp := recipe{}
	rcp.Sha1ver = SHA1VER
	rcp.BuildTime = BUILDTIME
	rcp.MaxProcessNum = *flagMaxProcessNum
	rcp.NumCPU = runtime.NumCPU()
	rcp.Token = token
	//mongoDB client 연결
	client, err := mongo.NewClient(options.Client().ApplyURI(*flagMongoDBURI))
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	err = client.Connect(ctx)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	defer client.Disconnect(ctx)
	err = client.Ping(ctx, readpref.Primary())
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	adminsetting, err := GetAdminSetting(client)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	rcp.Adminsetting = adminsetting
	user, err := GetUser(client, token.ID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	rcp.User = user
	w.Header().Set("Content-Type", "text/html")
	err = TEMPLATES.ExecuteTemplate(w, "help", rcp)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
}