rename rpcx to zrpc

zrpc/internal/auth/auth.go

@@ -0,0 +1,73 @@
+package auth
+
+import (
+	"context"
+	"time"
+
+	"github.com/tal-tech/go-zero/core/collection"
+	"github.com/tal-tech/go-zero/core/stores/redis"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+const defaultExpiration = 5 * time.Minute
+
+type Authenticator struct {
+	store  *redis.Redis
+	key    string
+	cache  *collection.Cache
+	strict bool
+}
+
+func NewAuthenticator(store *redis.Redis, key string, strict bool) (*Authenticator, error) {
+	cache, err := collection.NewCache(defaultExpiration)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Authenticator{
+		store:  store,
+		key:    key,
+		cache:  cache,
+		strict: strict,
+	}, nil
+}
+
+func (a *Authenticator) Authenticate(ctx context.Context) error {
+	md, ok := metadata.FromIncomingContext(ctx)
+	if !ok {
+		return status.Error(codes.Unauthenticated, missingMetadata)
+	}
+
+	apps, tokens := md[appKey], md[tokenKey]
+	if len(apps) == 0 || len(tokens) == 0 {
+		return status.Error(codes.Unauthenticated, missingMetadata)
+	}
+
+	app, token := apps[0], tokens[0]
+	if len(app) == 0 || len(token) == 0 {
+		return status.Error(codes.Unauthenticated, missingMetadata)
+	}
+
+	return a.validate(app, token)
+}
+
+func (a *Authenticator) validate(app, token string) error {
+	expect, err := a.cache.Take(app, func() (interface{}, error) {
+		return a.store.Hget(a.key, app)
+	})
+	if err != nil {
+		if a.strict {
+			return status.Error(codes.Internal, err.Error())
+		} else {
+			return nil
+		}
+	}
+
+	if token != expect {
+		return status.Error(codes.Unauthenticated, accessDenied)
+	}
+
+	return nil
+}

zrpc/internal/auth/credential.go

@@ -0,0 +1,47 @@
+package auth
+
+import (
+	"context"
+
+	"google.golang.org/grpc/metadata"
+)
+
+type Credential struct {
+	App   string
+	Token string
+}
+
+func (c *Credential) GetRequestMetadata(context.Context, ...string) (map[string]string, error) {
+	return map[string]string{
+		appKey:   c.App,
+		tokenKey: c.Token,
+	}, nil
+}
+
+func (c *Credential) RequireTransportSecurity() bool {
+	return false
+}
+
+func ParseCredential(ctx context.Context) Credential {
+	var credential Credential
+
+	md, ok := metadata.FromIncomingContext(ctx)
+	if !ok {
+		return credential
+	}
+
+	apps, tokens := md[appKey], md[tokenKey]
+	if len(apps) == 0 || len(tokens) == 0 {
+		return credential
+	}
+
+	app, token := apps[0], tokens[0]
+	if len(app) == 0 || len(token) == 0 {
+		return credential
+	}
+
+	credential.App = app
+	credential.Token = token
+
+	return credential
+}

zrpc/internal/auth/credential_test.go

@@ -0,0 +1,62 @@
+package auth
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc/metadata"
+)
+
+func TestParseCredential(t *testing.T) {
+	tests := []struct {
+		name        string
+		withNil     bool
+		withEmptyMd bool
+		app         string
+		token       string
+	}{
+		{
+			name:    "nil",
+			withNil: true,
+		},
+		{
+			name:        "empty md",
+			withEmptyMd: true,
+		},
+		{
+			name: "empty",
+		},
+		{
+			name:  "valid",
+			app:   "foo",
+			token: "bar",
+		},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			var ctx context.Context
+			if test.withNil {
+				ctx = context.Background()
+			} else if test.withEmptyMd {
+				ctx = metadata.NewIncomingContext(context.Background(), metadata.MD{})
+			} else {
+				md := metadata.New(map[string]string{
+					"app":   test.app,
+					"token": test.token,
+				})
+				ctx = metadata.NewIncomingContext(context.Background(), md)
+			}
+			cred := ParseCredential(ctx)
+			assert.False(t, cred.RequireTransportSecurity())
+			m, err := cred.GetRequestMetadata(context.Background())
+			assert.Nil(t, err)
+			assert.Equal(t, test.app, m[appKey])
+			assert.Equal(t, test.token, m[tokenKey])
+		})
+	}
+}

zrpc/internal/auth/vars.go

@@ -0,0 +1,9 @@
+package auth
+
+const (
+	appKey   = "app"
+	tokenKey = "token"
+
+	accessDenied    = "access denied"
+	missingMetadata = "app/token required"
+)