如何在golang中设置抓取大小？

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    client := &http.Client{
        Transport: &http.Transport{
            MaxResponseHeaderBytes: 1024,
        },
    }

    req, err := http.NewRequest("GET", "https://example.com", nil)
    if err != nil {
        fmt.Println("Error creating request:", err)
        return
    }

    resp, err := client.Do(req)
    if err != nil {
        fmt.Println("Error sending request:", err)
        return
    }
    defer resp.Body.Close()

    limitedBody := &LimitedReader{
        R: resp.Body,
        N: 1024, // 设置抓取大小为1024字节
    }

    body, err := ioutil.ReadAll(limitedBody)
    if err != nil {
        fmt.Println("Error reading response body:", err)
        return
    }

    fmt.Println("Response:", string(body))
}

type LimitedReader struct {
    R io.Reader
    N int64
}

func (l *LimitedReader) Read(p []byte) (n int, err error) {
    if l.N <= 0 {
        return 0, io.EOF
    }
    if int64(len(p)) > l.N {
        p = p[:l.N]
    }
    n, err = l.R.Read(p)
    l.N -= int64(n)
    return
}