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Mastering Go – Third Edition

You're reading from   Mastering Go – Third Edition Harness the power of Go to build professional utilities and concurrent servers and services

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Product type Paperback
Published in Aug 2021
Publisher Packt
ISBN-13 9781801079310
Length 682 pages
Edition 3rd Edition
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Author (1):
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Mihalis Tsoukalos Mihalis Tsoukalos
Author Profile Icon Mihalis Tsoukalos
Mihalis Tsoukalos
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Toc

Table of Contents (17) Chapters Close

Preface 1. A Quick Introduction to Go 2. Basic Go Data Types FREE CHAPTER 3. Composite Data Types 4. Reflection and Interfaces 5. Go Packages and Functions 6. Telling a UNIX System What to Do 7. Go Concurrency 8. Building Web Services 9. Working with TCP/IP and WebSocket 10. Working with REST APIs 11. Code Testing and Profiling 12. Working with gRPC 13. Go Generics 14. Other Books You May Enjoy
15. Index
Appendix A – Go Garbage Collector

Developing a gRPC client

This section presents the development of the gRPC client based on the api.proto file presented earlier. The main purpose of the client is to test the functionality of the server. However, what is really important is the implementation of three helper functions, each one corresponding to a different RPC call, because these three functions allow you to interact with the gRPC server. The purpose of the main() function of gClient.go is to use these three helper functions.

So, the code of gClient.go is the following:

package main
import (
    "context"
    "fmt"
    "math/rand"
    "os"
    "time"
    "github.com/mactsouk/protoapi"
    "google.golang.org/grpc"
)
var port = ":8080"
func AskingDateTime(ctx context.Context, m protoapi.RandomClient) (*protoapi.DateTime, error) {

You can name the AskingDateTime() function anything you want. However, the signature of the function...

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