/
client.go
158 lines (130 loc) · 4.31 KB
/
client.go
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package main
import (
"context"
"flag"
"fmt"
"io"
"log"
"net"
"os"
"time"
"github.com/Danr17/grpc_framework/middleware/grpcklog"
"github.com/Danr17/grpc_framework/middleware/grpcopentelemetry"
api "github.com/Danr17/grpc_framework/proto"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
"k8s.io/klog/klogr"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
)
var (
addr = flag.String("addr", "localhost", "The address of the server to connect to")
port = flag.String("port", "8080", "The port to connect to")
)
func main() {
flag.Parse()
logger := klogr.New()
grpcopentelemetry.Init()
if flag.NArg() < 1 {
fmt.Fprintln(os.Stderr, "missing command: getprodtypes or getprods")
os.Exit(1)
}
creds, err := credentials.NewClientTLSFromFile("../cert/service.pem", "")
if err != nil {
log.Fatalf("could not process the credentials: %v", err)
}
opts := []grpcklog.Option{
grpcklog.WithDurationField(grpcklog.DurationToTimeMillisField),
}
dialOpts := []grpc.DialOption{
grpc.WithUnaryInterceptor(
grpc_middleware.ChainUnaryClient(
grpcklog.UnaryClientInterceptor(logger, opts...),
grpcopentelemetry.UnaryClientInterceptor,
),
),
grpc.WithStreamInterceptor(grpcklog.StreamClientInterceptor(logger, opts...)),
grpc.WithTransportCredentials(creds),
}
ctx, cancel := context.WithTimeout(context.Background(), 4*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, net.JoinHostPort(*addr, *port), dialOpts...)
if err != nil {
log.Fatalf("Failed to dial server:, %s", err)
}
defer conn.Close()
client := api.NewProdServiceClient(conn)
//Adding the opentelemetry components
md := metadata.Pairs(
"timestamp", time.Now().Format(time.StampNano),
"client-id", "web-api-client-us-east-1",
"user-id", "some-test-user-id",
)
ctx = metadata.NewOutgoingContext(ctx, md)
switch cmd := flag.Arg(0); cmd {
case "getprodtypes":
err = getprodtypes(ctx, client, flag.Arg(1))
case "getprods":
err = getprods(ctx, client, flag.Arg(1), flag.Arg(2))
default:
err = fmt.Errorf("unknown subcommand %s", cmd)
}
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func getprodtypes(ctx context.Context, client api.ProdServiceClient, vendor string) error {
//log.Printf("requesting all product types from vendor: %s", vendor)
if vendor == "" {
return fmt.Errorf("Vendor arg is missing, select between available cloud vendors: google, aws, oracle")
}
requestProdType := api.ClientRequestType{
Vendor: vendor,
}
response, err := client.GetVendorProdTypes(ctx, &requestProdType)
if err != nil {
return err
}
if err != nil {
if errStatus, ok := status.FromError(err); ok {
return status.Errorf(errStatus.Code(), "error while calling client.GetVendorProdTypes() method: %v ", errStatus.Message())
}
return fmt.Errorf("Could not get the products: %v", err)
}
fmt.Printf("%s cloud products type are: %s\n", vendor, response.GetProductType())
return nil
}
func getprods(ctx context.Context, client api.ProdServiceClient, vendor string, prodType string) error {
//log.Printf("requesting all %s products from %s", prodType, vendor)
if vendor == "" || prodType == "" {
return fmt.Errorf("You need both, vendor and prodType args. Example command: $client oracle storage")
}
requestProd := api.ClientRequestProds{
Vendor: vendor,
ProductType: prodType,
}
stream, err := client.GetVendorProds(ctx, &requestProd)
if err != nil {
if errStatus, ok := status.FromError(err); ok {
return status.Errorf(errStatus.Code(), "error while calling client.GetVendorProds() method: %v ", errStatus.Message())
}
return status.Errorf(codes.Internal, "Could not get the stream of products : %v", err)
}
for {
product, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
if errStatus, ok := status.FromError(err); ok {
return status.Errorf(errStatus.Code(), "error while receiving the stream for client.GetVendorProds: %v ", errStatus.Message())
}
return status.Errorf(codes.Internal, "error while receiving the stream for client.GetVendorProds: %v", err)
}
fmt.Printf("Title: %s, Url: %s, ShortUrl: %s\n", product.GetProduct().GetTitle(), product.GetProduct().GetUrl(), product.GetProduct().GetShortUrl())
}
return nil
}