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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package flight_test
import (
"context"
"errors"
"fmt"
"io"
"log"
"github.com/apache/arrow-go/v18/arrow/flight"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/status"
)
type serverAuth struct{}
func (sa *serverAuth) Authenticate(c flight.AuthConn) error {
in, err := c.Read()
if errors.Is(err, io.EOF) {
return status.Error(codes.Unauthenticated, "no auth info provided")
}
if err != nil {
return status.Error(codes.FailedPrecondition, "error reading auth handshake")
}
// do something with in....
fmt.Println(string(in))
// send auth token back
return c.Send([]byte("foobar"))
}
func (sa *serverAuth) IsValid(token string) (interface{}, error) {
if token == "foobar" {
return "foo", nil
}
return "", status.Error(codes.PermissionDenied, "invalid auth token")
}
func Example_server() {
server := flight.NewFlightServer()
server.Init("localhost:0")
svc := &flight.BaseFlightServer{}
svc.SetAuthHandler(&serverAuth{})
server.RegisterFlightService(svc)
go server.Serve()
defer server.Shutdown()
conn, err := grpc.NewClient(server.Addr().String(), grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
log.Fatal(err)
}
defer conn.Close()
client := flight.NewFlightServiceClient(conn)
stream, err := client.Handshake(context.Background())
if err != nil {
log.Fatal(err)
}
// ignore error handling here for brevity
stream.Send(&flight.HandshakeRequest{Payload: []byte("baz")})
resp, _ := stream.Recv()
fmt.Println(string(resp.Payload))
// Output:
// baz
// foobar
}
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