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main.go
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main.go
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package main
import (
"context"
"flag"
"fmt"
"log"
"net/http"
"os"
"os/signal"
"time"
"github.com/gmgale/BlueSky/handlers"
"github.com/gmgale/BlueSky/ratelimit"
"github.com/gmgale/BlueSky/testing"
"github.com/gorilla/mux"
)
func init() {
// Allocate storage
ratelimit.UserLog = *ratelimit.SessionStorage()
dirErr := os.Mkdir("photos", os.ModePerm)
if dirErr != nil {
fmt.Printf("Error creating photos folder during boot.\n%v\n", dirErr)
}
}
func main() {
var flagPort string
var flagHost string
flag.StringVar(&flagPort, "port", "9090", "Port for server setup.")
flag.StringVar(&flagHost, "host", "localhost", "Host IP for server setup.")
flag.IntVar(&ratelimit.GlobalRateLimit, "limit", -1, "Rate limit per minute.")
flag.BoolVar(&testing.TestingFlag, "test", false, "Disable external IP calls.")
flag.Parse()
if ratelimit.GlobalRateLimit == -1 {
fmt.Printf("WARNING: Rate-limiting is DISABLED.\n")
fmt.Printf("Use commang line flag '-limit' to set.\n")
} else {
fmt.Printf("Rate-limiting is ENABLED to %d requests per minute.\n", ratelimit.GlobalRateLimit)
}
sm := mux.NewRouter()
getRouter := sm.Methods(http.MethodGet).Subrouter()
logRouter := sm.Methods(http.MethodGet).Subrouter()
getRouter.HandleFunc("/currentweather/{city}/{imgSize:[a-z]+}", handlers.GetImage)
getRouter.Use(handlers.RatelimitMiddleware)
getRouter.Use(handlers.WeatherMiddleware)
logRouter.HandleFunc("/logs", handlers.Logs)
fmt.Printf("Starting server at %s:%s\n", flagHost, flagPort)
s := http.Server{
Addr: flagHost + ":" + flagPort,
Handler: sm,
IdleTimeout: 120 * time.Second,
ReadTimeout: 1 * time.Second,
WriteTimeout: 1 * time.Second,
}
go func() {
err := s.ListenAndServe()
if err != nil {
log.Fatal(err)
}
}()
sigChan := make(chan os.Signal)
signal.Notify(sigChan, os.Interrupt)
signal.Notify(sigChan, os.Kill)
sig := <-sigChan
log.Println("Received terminate, gracefully shutting down.", sig)
tc, _ := context.WithTimeout(context.Background(), 30*time.Second)
// Clean up when shutting down
fmt.Printf("Removing photos folder.\n")
dirErr := os.RemoveAll("photos")
if dirErr != nil {
fmt.Printf("Error removing photos folder during clean-up. Directory may persist.\n%v\n", dirErr)
}
s.Shutdown(tc)
}