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main.go
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main.go
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package main
import (
"database/sql"
"fmt"
"net/http"
"os"
"strconv"
"time"
"github.com/gorilla/mux"
_ "github.com/joho/godotenv/autoload"
_ "github.com/lib/pq"
"github.com/msanatan/go-chatroom/app/auth"
"github.com/msanatan/go-chatroom/app/models"
"github.com/msanatan/go-chatroom/app/service"
"github.com/msanatan/go-chatroom/rabbitmq"
"github.com/msanatan/go-chatroom/utils"
"github.com/streadway/amqp"
)
func main() {
logLevel := os.Getenv("LOG_LEVEL")
logger := utils.InitLogger(logLevel, "chatroom")
var wsServer *service.Server
var rabbitMQClient *rabbitmq.Client
// Setup Postgres database
var dbPort int
dbPortString := os.Getenv("POSTGRES_PORT")
if dbPortString == "" {
dbPort = 5432
} else {
var convErr error
dbPort, convErr = strconv.Atoi(dbPortString)
if convErr != nil {
logger.Fatalf("%s is not a valid Postgres port number", dbPortString)
}
}
connectionString := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
os.Getenv("POSTGRES_HOST"), dbPort, os.Getenv("POSTGRES_USER"),
os.Getenv("POSTGRES_PASSWORD"), os.Getenv("POSTGRES_DB"))
db, err := sql.Open("postgres", connectionString)
if err != nil {
logger.Fatalf("could not connect to Postgres DB: %s", err.Error())
}
dbClient, err := models.NewChatroomDB(db, logger)
if err != nil {
logger.Fatalf("could not connect to Postgres DB: %s", err.Error())
}
err = dbClient.Migrate()
if err != nil {
logger.Fatalf("could not complete DB migrations: %s", err.Error())
}
rabbitConnection := os.Getenv("RABBITMQ_CONNECTION")
if rabbitConnection == "" {
logger.Error("No RabbitMQ connection string provided, will not setup connection")
} else {
conn, err := amqp.Dial(rabbitConnection)
if err != nil {
logger.Fatalf("could not connect to RabbitMQ instance: %s", err.Error())
}
defer conn.Close()
ch, err := conn.Channel()
if err != nil {
logger.Fatalf("could not open a channel: %s", err.Error())
}
defer ch.Close()
rabbitMQClient = rabbitmq.NewClient(ch, "command_queue", "response_queue", logger)
err = rabbitMQClient.QueueDeclare()
if err != nil {
logger.Fatalf("could not declare queues: %s", err.Error())
}
}
wsServer = service.NewServer(rabbitMQClient, "/", logger)
go wsServer.Run()
if rabbitMQClient != nil {
go wsServer.ConsumeRMQ()
}
// Setup default WS Client config
defaultClientConfig := &service.ClientConfig{
WriteWait: 10 * time.Second,
PongWait: 60 * time.Second,
PingPeriod: (60 * time.Second * 9) / 10,
MaxMessageSize: 10000,
}
staticFiles := os.Getenv("STATIC_FILES")
if staticFiles == "" {
staticFiles = "./public/"
}
// Create auth client
jwtSecret := os.Getenv("JWT_SECRET")
if jwtSecret == "" {
logger.Fatalf("Missing JWT_SECRET env var")
}
authClient := auth.NewClient(dbClient, jwtSecret, logger)
r := mux.NewRouter()
r.HandleFunc("/login", authClient.Login).Methods("POST")
r.HandleFunc("/register", authClient.CreateUser).Methods("POST")
protected := r.PathPrefix("/api").Subrouter()
protected.HandleFunc("/ws", service.ServeWs(wsServer, defaultClientConfig, logger))
protected.Use(authClient.IsAuthenticated)
r.PathPrefix("/").Handler(http.FileServer(http.Dir(staticFiles)))
// Keep a log of all incoming requests
r.Use(func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logger.Debug(r.RequestURI)
next.ServeHTTP(w, r)
})
})
port := os.Getenv("PORT")
if port == "" {
port = "8080"
}
logger.Debugf("Running at http://localhost:%s", port)
logger.Fatal(http.ListenAndServe(":"+port, r))
}