1 // Copyright (C) 2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions
6 // are met:
7 // 1. Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // 2. Redistributions in binary form must reproduce the above copyright
10 // notice, this list of conditions and the following disclaimer in the
11 // documentation and/or other materials provided with the distribution.
12 //
13 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
14 // ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
15 // TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
17 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 // client implements a simple client for the backend protocol.
26 package main
28 import (
29 "flag"
30 "log"
32 "golang.org/x/net/context"
33 "google.golang.org/grpc"
35 pb "tokkee.org/go-talk/grpc/proto/backend"
36 )
38 var (
39 server = flag.String("server", "localhost:50051", "server address")
40 )
42 func main() {
43 ctx := context.Background()
44 flag.Parse()
46 if flag.NArg() != 1 {
47 log.Fatal("Missing query.")
48 }
49 query := flag.Arg(0)
51 conn, err := grpc.Dial(*server, grpc.WithInsecure())
52 if err != nil {
53 log.Fatalf("Failed to connect to server at %s: %v", *server, err)
54 }
55 defer conn.Close()
57 c := pb.NewBackendClient(conn)
58 res, err := c.Query(ctx, &pb.QueryRequest{Query: query})
59 if err != nil {
60 log.Fatalf("Query failed: %v", err)
61 }
62 log.Printf("%s: %d\n", res.Type, res.N)
63 }