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Mastering Go

You're reading from   Mastering Go Leverage Go's expertise for advanced utilities, empowering you to develop professional software

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Product type Paperback
Published in Mar 2024
Publisher Packt
ISBN-13 9781805127147
Length 736 pages
Edition 4th Edition
Languages
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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 (19) Chapters Close

Preface 1. A Quick Introduction to Go FREE CHAPTER 2. Basic Go Data Types 3. Composite Data Types 4. Go Generics 5. Reflection and Interfaces 6. Go Packages and Functions 7. Telling a UNIX System What to Do 8. Go Concurrency 9. Building Web Services 10. Working with TCP/IP and WebSocket 11. Working with REST APIs 12. Code Testing and Profiling 13. Fuzz Testing and Observability 14. Efficiency and Performance 15. Changes in Recent Go Versions 16. Other Books You May Enjoy
17. Index
Appendix: The Go Garbage Collector

Timing out HTTP connections

This section presents techniques for timing out HTTP connections that take too long to finish and work either on the server or the client side.

Using SetDeadline()

The SetDeadline() function is used by net to set the read and write deadlines of network connections. Due to the way that SetDeadline() works, you need to call SetDeadline() before any read or write operation. Keep in mind that Go uses deadlines to implement timeouts, so you do not need to reset the timeout every time your application receives or sends any data.

The use of SetDeadline() is illustrated in withDeadline.go and, more specifically, in the implementation of the Timeout() function:

var timeout = time.Duration(time.Second)
func Timeout(network, host string) (net.Conn, error) {
    conn, err := net.DialTimeout(network, host, timeout)
    if err != nil {
        return nil, err
    }
    conn.SetDeadline(time.Now().Add(timeout))
    return conn, nil
}

The timeout...

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