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golang http server

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Restu Wahyu Saputra answered on January 12, 2021 Popularity 9/10 Helpfulness 3/10

answer golang http server

related Golang HTTP Server

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golang http server

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type ApiResponse struct {
	Code    uint32
	Message string
}

func main() {
	router := http.NewServeMux()

	router.HandleFunc("/", (func(w http.ResponseWriter, r *http.Request) {
		json.NewEncoder(w).Encode(&ApiResponse{Code: http.StatusOK, Message: "Hello Wordl"})
	}))

	err := http.ListenAndServe(":3000", router)
	if err != nil {
		log.Fatal(err)
	}
}

Popularity 9/10 Helpfulness 3/10 Language go

Source: Grepper

Tags: go http server

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Contributed on Apr 11 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

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Golang HTTP Server

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// Code by Divyanshu Shekhar - https://divyanshushekhar.com/golang-http-server/

// Golang HTTP Server
package main

import (
	"fmt"
	"log"
	"net/http"
)

const (
	// Host name of the HTTP Server
	Host = "localhost"
	// Port of the HTTP Server
	Port = "8080"
)

func home(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "This is a Simple HTTP Web Server!")
}

func main() {
	http.HandleFunc("/", home)
	err := http.ListenAndServe(Host+":"+Port, nil)
	if err != nil {
		log.Fatal("Error Starting the HTTP Server : ", err)
		return
	}

}

Popularity 10/10 Helpfulness 5/10 Language go

Source: Grepper

Tags: go g

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Contributed on Jan 12 2021

Mushy Millipede

0 Answers Avg Quality 2/10

golang http server

Comment

http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
  data := map[string]string{"name": "john doe"}
  json.NewEncoder(w).Encode(data)
})

http.ListenAndServe(":3000", nil)

Popularity 9/10 Helpfulness 2/10 Language go

Source: Grepper

Tags: go g

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Contributed on Apr 09 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

golang http server

Comment

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"net"
	"net/http"
	"os"
	"syscall"

	"golang.org/x/sys/unix"
)

type Response struct {
	StatCode uint        `json:"stat_code"`
	StatMsg  string      `json:"stat_msg"`
	Data     interface{} `json:"data,omitempty"`
}

func main() {
	LoadEnvConfig()
	s, n := Server()

	s.HandleFunc("/", func(rw http.ResponseWriter, r *http.Request) {
		rw.Header().Set("Content-Type", "application/json")

		res := Response{
			StatCode: http.StatusOK,
			StatMsg:  "Golang application running using PM2",
		}

		json.NewEncoder(rw).Encode(&res)
	})

	err := http.Serve(n, s)
	if err != nil {
		log.Fatalf("Server listening error %v", err)
	} else {
		log.Printf("Server listening on port: %s", os.Getenv("GO_PORT"))
	}
}

func Server() (*http.ServeMux, net.Listener) {
	var lc = net.ListenConfig{
		Control: func(network, address string, c syscall.RawConn) error {
			err := c.Control(func(fd uintptr) {
				err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
				if err != nil {
					log.Fatal(err)
				}
			})
			if err != nil {
				log.Fatal(err)
			}
			return nil
		},
	}

	ln, err := lc.Listen(context.Background(), "tcp", fmt.Sprintf("127.0.0.1:%s", os.Getenv("GO_PORT")))
	if err != nil {
		log.Fatalf("Net listening error %v", err)
	}

	router := http.NewServeMux()

	return router, ln
}

func LoadEnvConfig() {
	_, bool := os.LookupEnv("GO_PORT")
	if !bool {
		os.Setenv("GO_PORT", "4000")
	}
}

Popularity 9/10 Helpfulness 2/10 Language go

Source: Grepper

Tags: go http

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Contributed on Nov 06 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

golang http

Comment

package main

import (
	"context"
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	_ "github.com/lib/pq"
	migrate "github.com/rubenv/sql-migrate"
)

func main() {
	SetupDatabase()
	router := http.NewServeMux()

	router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("content-type", "application/json")

		fmt.Fprintln(w, map[string]interface{}{"data": "hello wordl"})
	})

	SetupGraceFullShutdown(router)
}

func SetupDatabase() *sql.DB {
	driver_name := "postgres"
	dsn_url := "postgres://admin:admin@localhost:5432/postgres?sslmode=disable"
	migration_dir := "./database/migrations"

	db, _ := sql.Open(driver_name, dsn_url)

	if err := db.Ping(); err != nil {
		log.Fatalf("Database connection error: %s", err.Error())
	}

	if os.Getenv("GO_ENV") == "development" {
		migrations := migrate.FileMigrationSource{
			Dir: migration_dir,
		}

		if _, err := migrations.FindMigrations(); err != nil {
			log.Fatalf("Find migration database error: %s", err.Error())
		}

		if _, err := migrate.Exec(db, driver_name, migrations, migrate.Up); err != nil {
			log.Fatalf("Execute migration database error: %s", err.Error())
		}
	}

	defer log.Println("Database connection success")
	return db
}

func SetupGraceFullShutdown(handler *http.ServeMux) {
	httpServer := http.Server{
		Addr:           fmt.Sprintf(":%s", "3000"),
		ReadTimeout:    time.Duration(time.Second) * 60,
		WriteTimeout:   time.Duration(time.Second) * 30,
		IdleTimeout:    time.Duration(time.Second) * 120,
		MaxHeaderBytes: 3145728,
		Handler:        handler,
	}

	if err := httpServer.ListenAndServe(); err != nil {
		log.Fatalf("Server is not running: %s", err.Error())
		os.Exit(0)
	}

	osSignal := make(chan os.Signal, 1)
	signal.Notify(osSignal, os.Interrupt, syscall.SIGTERM)
	log.Printf("Signal received: %v", <-osSignal)

	if sig := <-osSignal; sig == os.Interrupt || sig == syscall.SIGTERM {
		log.Println("Waiting to server shutdown")

		ctx, cancel := context.WithTimeout(context.Background(), time.Duration(time.Second)*10)
		defer cancel()

		if err := httpServer.Shutdown(ctx); err != nil {
			log.Println("HTTP server shutdown error: %s", err.Error())
		}

		log.Println("HTTP server shutdown")
	}
}

Popularity 10/10 Helpfulness 2/10 Language go

Source: Grepper

Tags: go g

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Contributed on Dec 19 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

golang http server

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