forked from grpc/grpc-go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
client.go
205 lines (190 loc) · 6.84 KB
/
client.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// Package main implements a simple gRPC client that demonstrates how to use gRPC-Go libraries
// to perform unary, client streaming, server streaming and full duplex RPCs.
//
// It interacts with the route guide service whose definition can be found in routeguide/route_guide.proto.
package main
import (
"flag"
"io"
"math/rand"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
pb "google.golang.org/grpc/examples/route_guide/routeguide"
"google.golang.org/grpc/grpclog"
)
var (
tls = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
caFile = flag.String("ca_file", "testdata/ca.pem", "The file containning the CA root cert file")
serverAddr = flag.String("server_addr", "127.0.0.1:10000", "The server address in the format of host:port")
serverHostOverride = flag.String("server_host_override", "x.test.youtube.com", "The server name use to verify the hostname returned by TLS handshake")
)
// printFeature gets the feature for the given point.
func printFeature(client pb.RouteGuideClient, point *pb.Point) {
grpclog.Printf("Getting feature for point (%d, %d)", point.Latitude, point.Longitude)
feature, err := client.GetFeature(context.Background(), point)
if err != nil {
grpclog.Fatalf("%v.GetFeatures(_) = _, %v: ", client, err)
}
grpclog.Println(feature)
}
// printFeatures lists all the features within the given bounding Rectangle.
func printFeatures(client pb.RouteGuideClient, rect *pb.Rectangle) {
grpclog.Printf("Looking for features within %v", rect)
stream, err := client.ListFeatures(context.Background(), rect)
if err != nil {
grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
}
for {
feature, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
}
grpclog.Println(feature)
}
}
// runRecordRoute sends a sequence of points to server and expects to get a RouteSummary from server.
func runRecordRoute(client pb.RouteGuideClient) {
// Create a random number of random points
r := rand.New(rand.NewSource(time.Now().UnixNano()))
pointCount := int(r.Int31n(100)) + 2 // Traverse at least two points
var points []*pb.Point
for i := 0; i < pointCount; i++ {
points = append(points, randomPoint(r))
}
grpclog.Printf("Traversing %d points.", len(points))
stream, err := client.RecordRoute(context.Background())
if err != nil {
grpclog.Fatalf("%v.RecordRoute(_) = _, %v", client, err)
}
for _, point := range points {
if err := stream.Send(point); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, point, err)
}
}
reply, err := stream.CloseAndRecv()
if err != nil {
grpclog.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
}
grpclog.Printf("Route summary: %v", reply)
}
// runRouteChat receives a sequence of route notes, while sending notes for various locations.
func runRouteChat(client pb.RouteGuideClient) {
notes := []*pb.RouteNote{
{&pb.Point{Latitude: 0, Longitude: 1}, "First message"},
{&pb.Point{Latitude: 0, Longitude: 2}, "Second message"},
{&pb.Point{Latitude: 0, Longitude: 3}, "Third message"},
{&pb.Point{Latitude: 0, Longitude: 1}, "Fourth message"},
{&pb.Point{Latitude: 0, Longitude: 2}, "Fifth message"},
{&pb.Point{Latitude: 0, Longitude: 3}, "Sixth message"},
}
stream, err := client.RouteChat(context.Background())
if err != nil {
grpclog.Fatalf("%v.RouteChat(_) = _, %v", client, err)
}
waitc := make(chan struct{})
go func() {
for {
in, err := stream.Recv()
if err == io.EOF {
// read done.
close(waitc)
return
}
if err != nil {
grpclog.Fatalf("Failed to receive a note : %v", err)
}
grpclog.Printf("Got message %s at point(%d, %d)", in.Message, in.Location.Latitude, in.Location.Longitude)
}
}()
for _, note := range notes {
if err := stream.Send(note); err != nil {
grpclog.Fatalf("Failed to send a note: %v", err)
}
}
stream.CloseSend()
<-waitc
}
func randomPoint(r *rand.Rand) *pb.Point {
lat := (r.Int31n(180) - 90) * 1e7
long := (r.Int31n(360) - 180) * 1e7
return &pb.Point{Latitude: lat, Longitude: long}
}
func main() {
flag.Parse()
var opts []grpc.DialOption
if *tls {
var sn string
if *serverHostOverride != "" {
sn = *serverHostOverride
}
var creds credentials.TransportCredentials
if *caFile != "" {
var err error
creds, err = credentials.NewClientTLSFromFile(*caFile, sn)
if err != nil {
grpclog.Fatalf("Failed to create TLS credentials %v", err)
}
} else {
creds = credentials.NewClientTLSFromCert(nil, sn)
}
opts = append(opts, grpc.WithTransportCredentials(creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
conn, err := grpc.Dial(*serverAddr, opts...)
if err != nil {
grpclog.Fatalf("fail to dial: %v", err)
}
defer conn.Close()
client := pb.NewRouteGuideClient(conn)
// Looking for a valid feature
printFeature(client, &pb.Point{Latitude: 409146138, Longitude: -746188906})
// Feature missing.
printFeature(client, &pb.Point{Latitude: 0, Longitude: 0})
// Looking for features between 40, -75 and 42, -73.
printFeatures(client, &pb.Rectangle{
Lo: &pb.Point{Latitude: 400000000, Longitude: -750000000},
Hi: &pb.Point{Latitude: 420000000, Longitude: -730000000},
})
// RecordRoute
runRecordRoute(client)
// RouteChat
runRouteChat(client)
}