/
server.go
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/
server.go
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package main
import (
"context"
"flag"
"fmt"
mago "github.com/alirezastack/mago/magopb"
"github.com/nyaruka/phonenumbers"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readpref"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/status"
"log"
"net"
"os"
"os/signal"
"sync"
"syscall"
"time"
)
var port = flag.Int("port", 50051, "gRPC Listening Port")
type RpcServer struct {
mago.UnimplementedMagoServiceServer
address string
grpcServer *grpc.Server
}
type User struct {
ID primitive.ObjectID `bson:"_id"`
Phone string `bson:"phone"`
IsVerified bool `bson:"is_verified"`
Roles []string `bson:"roles"`
Status string `bson:"status"`
FirstName string `bson:"first_name"`
LastName string `bson:"last_name"`
Password string `bson:"password"`
}
func NewServer(addr string) *RpcServer {
// initialize encryption
certFile := "helpers/ssl/server.crt"
keyFile := "helpers/ssl/server.pem"
creds, certErr := credentials.NewServerTLSFromFile(certFile, keyFile)
if certErr != nil {
log.Fatalf("Failed loading certificates: %v", certErr)
}
opts := grpc.Creds(creds)
s := grpc.NewServer(opts)
rs := &RpcServer{
address: addr,
grpcServer: s,
}
return rs
}
func (s *RpcServer) CreateUser(ctx context.Context, in *mago.CreateUserRequest) (*mago.CreateUserResponse, error) {
log.Printf("Received user phone: %v\n", in.GetPhone())
// We just check client cancellation before expensive calls
//if ctx.Err() == context.Canceled {
// log.Println("The client canceled the request!")
// return nil, status.Error(codes.Canceled, "The client canceled the request!")
//}
num, err := phonenumbers.Parse(in.GetPhone(), "IR")
formattedNumber := phonenumbers.Format(num, phonenumbers.E164)
log.Printf("International Phone Number: %v", formattedNumber)
if err != nil {
log.Printf("Failed to format phone number %v: %v", in.GetPhone(), err)
return nil, status.Errorf(
codes.InvalidArgument,
fmt.Sprintf("Invalid phone number given: %v", in.GetPhone()),
)
}
data := User{
ID: primitive.NewObjectID(),
FirstName: in.GetFirstName(),
LastName: in.GetLastName(),
Phone: formattedNumber,
Status: "active",
Roles: []string{},
}
res, err := collection.InsertOne(context.Background(), data)
if err != nil {
return nil, status.Errorf(
codes.Internal,
fmt.Sprintf("Could not create the user: %v", err),
)
}
log.Printf("Insterted user: %v\n", res.InsertedID)
oid, ok := res.InsertedID.(primitive.ObjectID)
if !ok {
return nil, status.Errorf(
codes.Internal,
fmt.Sprintf("Type cast to ObjectID failed: %v", ok))
}
return &mago.CreateUserResponse{UserId: oid.Hex()}, nil
}
func (s *RpcServer) Run() {
listener, err := net.Listen("tcp", s.address)
defer listener.Close()
if err != nil {
log.Fatalf("Failed to listen: %v", err)
}
log.Printf("rpc listening on: %v rpc_server\n", s.address)
mago.RegisterMagoServiceServer(s.grpcServer, s)
if err := s.grpcServer.Serve(listener); err != nil {
log.Fatalf("Failed to server on listener: %v", err)
}
}
// It stops the server from accepting new connections and RPCs and
// blocks until all the pending RPCs are finished.
func (s *RpcServer) Stop() {
log.Printf("Kill signal received, stopping Mago server...\n")
s.grpcServer.GracefulStop()
log.Printf("Mago server is stopped!\n")
}
var collection *mongo.Collection
// go run main.go --port 8085
func main() {
// on go code crash, we receive file name and line number
log.SetFlags(log.LstdFlags | log.Lshortfile)
flag.Parse()
// MONGO CLIENT INITIATION
log.Println("Initiating MongoDB database...")
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
client, err := mongo.Connect(ctx, options.Client().ApplyURI("mongodb://localhost:27017"))
err = client.Ping(ctx, readpref.Primary())
if err != nil {
log.Fatalf("Could not ping MongoDB server: %v", err)
}
log.Println("Successfully connected to MongoDB")
collection = client.Database("social").Collection("mago")
// gRPC SERVER INITIATION
log.Printf("Starting up Mago server on 0.0.0.0:%v...\n", *port)
server := NewServer(fmt.Sprintf("0.0.0.0:%d", *port))
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
server.Run()
wg.Done()
}()
// SIGNAL HANDLING AND GRACEFUL SHUTDOWN OF gRPC SERVER
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
<-signalChan
server.Stop()
cancel()
log.Println("canceled MongoDB operations")
err = client.Disconnect(context.TODO())
if err != nil {
log.Printf("Could not disconnect Mongo client cleanly: %v\n", err)
}
log.Println("disconnected MongoDB client")
log.Println("Good bye!")
wg.Wait()
}