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connect cartservice

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Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>
This commit is contained in:
Ahmet Alp Balkan 2018-06-26 11:01:24 -07:00
parent 36b7b9eb65
commit f3fe6d42ad
8 changed files with 93 additions and 14 deletions
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30
src/frontend/handlers.go
View file

@ -43,15 +43,20 @@ func ensureSessionID(next http.HandlerFunc) http.HandlerFunc {
}
func (fe *frontendServer) homeHandler(w http.ResponseWriter, r *http.Request) {
log.Printf("[home] session_id=%+v", r.Context().Value(ctxKeySessionID{}))
log.Printf("[home] session_id=%+v", sessionID(r))
currencies, err := fe.getCurrencies(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
http.Error(w, fmt.Sprintf("could not retrieve currencies: %+v", err), http.StatusInternalServerError)
return
}
products, err := fe.getProducts(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
http.Error(w, fmt.Sprintf("could not retrieve products: %+v", err), http.StatusInternalServerError)
return
}
cart, err := fe.getCart(r.Context(), sessionID(r))
if err != nil {
http.Error(w, fmt.Sprintf("could not retrieve cart: %+v", err), http.StatusInternalServerError)
return
}
@ -76,7 +81,8 @@ func (fe *frontendServer) homeHandler(w http.ResponseWriter, r *http.Request) {
"user_currency": currentCurrency(r),
"currencies": currencies,
"products": ps,
"session_id": r.Context().Value(ctxKeySessionID{}),
"session_id": sessionID(r),
"cart_size": len(cart),
}); err != nil {
log.Println(err)
}
@ -97,7 +103,7 @@ func (fe *frontendServer) productHandler(w http.ResponseWriter, r *http.Request)
currencies, err := fe.getCurrencies(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
http.Error(w, fmt.Sprintf("could not retrieve currencies: %+v", err), http.StatusInternalServerError)
return
}
@ -118,14 +124,14 @@ func (fe *frontendServer) productHandler(w http.ResponseWriter, r *http.Request)
"user_currency": currentCurrency(r),
"currencies": currencies,
"product": product,
"session_id": r.Context().Value(ctxKeySessionID{}),
"session_id": sessionID(r),
}); err != nil {
log.Println(err)
}
}
func (fe *frontendServer) logoutHandler(w http.ResponseWriter, r *http.Request) {
log.Printf("[home] session_id=%+v", r.Context().Value(ctxKeySessionID{}))
log.Printf("[home] session_id=%+v", sessionID(r))
for _, c := range r.Cookies() {
c.Expires = time.Now().Add(-time.Hour * 24 * 365)
c.MaxAge = -1
@ -137,7 +143,7 @@ func (fe *frontendServer) logoutHandler(w http.ResponseWriter, r *http.Request)
func (fe *frontendServer) setCurrencyHandler(w http.ResponseWriter, r *http.Request) {
cur := r.FormValue("currency_code")
log.Printf("[setCurrency] session_id=%+v code=%s", r.Context().Value(ctxKeySessionID{}), cur)
log.Printf("[setCurrency] session_id=%+v code=%s", sessionID(r), cur)
if cur != "" {
http.SetCookie(w, &http.Cookie{
Name: cookieCurrency,
@ -160,3 +166,11 @@ func currentCurrency(r *http.Request) string {
}
return defaultCurrency
}
func sessionID(r *http.Request) string {
v := r.Context().Value(ctxKeySessionID{})
if v != nil {
return v.(string)
}
return ""
}

6
src/frontend/main.go
View file

@ -50,7 +50,7 @@ func main() {
svc := new(frontendServer)
mustMapEnv(&svc.productCatalogSvcAddr, "PRODUCT_CATALOG_SERVICE_ADDR")
mustMapEnv(&svc.currencySvcAddr, "CURRENCY_SERVICE_ADDR")
// mustMapEnv(&svc.cartSvcAddr, "CART_SERVICE_ADDR")
mustMapEnv(&svc.cartSvcAddr, "CART_SERVICE_ADDR")
var err error
svc.currencySvcConn, err = grpc.DialContext(ctx, svc.currencySvcAddr, grpc.WithInsecure())
@ -61,6 +61,10 @@ func main() {
if err != nil {
log.Fatalf("failed to connect productcatalog service: %+v", err)
}
svc.cartSvcConn, err = grpc.DialContext(ctx, svc.cartSvcAddr, grpc.WithInsecure())
if err != nil {
log.Fatalf("failed to connect cart service at %s: %+v", svc.cartSvcAddr, err)
}
r := mux.NewRouter()
r.HandleFunc("/", ensureSessionID(svc.homeHandler)).Methods(http.MethodGet, http.MethodHead)

13
src/frontend/rpc.go
View file

@ -3,7 +3,11 @@ package main
import (
"context"
"google.golang.org/grpc/codes"
pb "frontend/genproto"
"google.golang.org/grpc/status"
)
const (
@ -37,6 +41,15 @@ func (fe *frontendServer) getProduct(ctx context.Context, id string) (*pb.Produc
return resp, err
}
func (fe *frontendServer) getCart(ctx context.Context, userID string) ([]*pb.CartItem, error) {
resp, err := pb.NewCartServiceClient(fe.cartSvcConn).GetCart(ctx, &pb.GetCartRequest{UserId: userID})
if status.Code(err) == codes.Canceled {
// TODO(ahmetb) remove this workaround when cartservice returns ok response to GetCart() with non-existing users
return nil, nil
}
return resp.GetItems(), err
}
func (fe *frontendServer) convertCurrency(ctx context.Context, money *pb.Money, currency string) (*pb.Money, error) {
if avoidNoopCurrencyConversionRPC && money.GetCurrencyCode() == currency {
return money, nil

2
src/frontend/templates/header.html
View file

@ -23,7 +23,7 @@
<option value="{{.}}" {{if eq . $.user_currency}}selected="selected"{{end}}>{{.}}</option>
{{end}}
</select>
<a class="btn btn-primary ml-1" href="/cart" role="button">View Cart</a>
<a class="btn btn-primary ml-1" href="/cart" role="button">View Cart ({{$.cart_size}})</a>
</form>
</div>
</div>

13
src/test-cli/main.go
View file

@ -299,8 +299,16 @@ func testCartService() error {
defer conn.Close()
cl := pb.NewCartServiceClient(conn)
log.Println("--- rpc AddItem()")
userID := "smoke-test-user"
log.Println("--- rpc GetCart()")
cartResp, err := cl.GetCart(context.TODO(), &pb.GetCartRequest{
UserId: userID})
if err != nil {
return err
}
log.Printf("--> %d items in cart for user %q", len(cartResp.Items), cartResp.UserId)
log.Println("--- rpc AddItem()")
_, err = cl.AddItem(context.TODO(), &pb.AddItemRequest{
UserId: userID,
Item: &pb.CartItem{ProductId: "1", Quantity: 2},
@ -319,14 +327,13 @@ func testCartService() error {
log.Printf("--> added item")
log.Println("--- rpc GetCart()")
cartResp, err := cl.GetCart(context.TODO(), &pb.GetCartRequest{
cartResp, err = cl.GetCart(context.TODO(), &pb.GetCartRequest{
UserId: userID})
if err != nil {
return err
}
log.Printf("--> %d items in cart for user %q", len(cartResp.Items), cartResp.UserId)
log.Printf("--> cart: %v", cartResp.Items)
log.Println("--- rpc EmptyCart()")
_, err = cl.EmptyCart(context.TODO(), &pb.EmptyCartRequest{
UserId: userID})