Deal with HTTP timeout error in Go (Golang)

To deal with an HTTP timeout error in Go, use the os.IsTimeout() operate from the built-in os bundle. It returns true if the request time restrict has been exceeded or false in any other case.

Instance

Within the instance, we create an HTTP shopper with a timeout of 1 nanosecond. With such a brief timeout, we are able to make sure that we’ll obtain a timeout error after we ship a request to the https://instance.com server.

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bundle fundamental

import (
    "log"
    "web/http"
    "os"
    "time"
)

func fundamental() {
    httpClient := http.Shopper{Timeout: 1 * time.Nanosecond}

    req, err := http.NewRequest(http.MethodGet, "https://instance.com", nil)
    if err != nil {
        log.Deadly(err)
    }

    _, err = httpClient.Do(req)
    if os.IsTimeout(err) {
        log.Printf("timeout error: %vn", err)
    }
}

Output:

2022/08/28 18:35:48 timeout error: Get "https://instance.com": context deadline exceeded (Shopper.Timeout exceeded whereas awaiting headers)

Learn this text to be taught extra concerning the context deadline exceeded, which can also be a timeout error.

To be sure that os.IsTimeout() works accurately, change the timeout worth in line 11 to 1 * time.Minute. If there may be at present no drawback with https://instance.com, the request will probably be processed throughout the time restrict of 1 minute and you’ll not see any error on the output.