How to Limit Bandwidth Usage in HTTP Get() in Go?

Limiting Bandwidth of HTTP Get in Go

For beginners in Go, it's useful to know how to limit bandwidth usage in http.Get(). While third-party packages offer convenient wrappers, understanding the mechanics under the hood is equally important.

To limit the bandwidth of http.Get(), you can use the following approach:

package main

import (
    "io"
    "net/http"
    "os"
    "time"
)

var datachunk int64 = 500       //Bytes
var timelapse time.Duration = 1 //per seconds

func main() {
    responce, _ := http.Get("http://google.com")
    for range time.Tick(timelapse * time.Second) {
        _, err := io.CopyN(os.Stdout, responce.Body, datachunk)
        if err != nil {
            break
        }
    }
}

This code iterates a loop that reads a specified number of bytes (datachunk) within a given time interval (timelapse). By continuously reading small chunks of data over a set period, you effectively rate-limit the bandwidth usage.

This approach avoids complex third-party dependencies and provides fine-grained control over bandwidth limitation.

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