$ cat main.go
package main

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

func main() {
        read := flag.Bool("read", false, "to read or not to read")
        flag.Parse()
        resp, _ := http.Get("https://www.google.com")
        defer resp.Body.Close()
        if *read {
                io.ReadAll(resp.Body)
        }
        fmt.Print(resp.Status)
}


$ GODEBUG=http2debug=1 go run main.go
2024/10/30 20:58:33 http2: Transport failed to get client conn for www.google.com:443: http2: no cached connection was available
2024/10/30 20:58:33 http2: Transport creating client conn 0x4000136000 to 142.251.39.100:443
2024/10/30 20:58:33 http2: Transport encoding header ":authority" = "www.google.com"
2024/10/30 20:58:33 http2: Transport encoding header ":method" = "GET"
2024/10/30 20:58:33 http2: Transport encoding header ":path" = "/"
2024/10/30 20:58:33 http2: Transport encoding header ":scheme" = "https"
2024/10/30 20:58:33 http2: Transport encoding header "accept-encoding" = "gzip"
2024/10/30 20:58:33 http2: Transport encoding header "user-agent" = "Go-http-client/2.0"
2024/10/30 20:58:33 http2: Transport received SETTINGS len=18, settings: MAX_CONCURRENT_STREAMS=100, INITIAL_WINDOW_SIZE=1048576, MAX_HEADER_LIST_SIZE=65536
2024/10/30 20:58:33 http2: Transport received WINDOW_UPDATE len=4 (conn) incr=983041
2024/10/30 20:58:33 http2: Transport received SETTINGS flags=ACK len=0
2024/10/30 20:58:33 http2: Transport received HEADERS flags=END_HEADERS stream=1 len=846
200 OK


$ GODEBUG=http2debug=1 go run main.go  -read
2024/10/30 20:58:37 http2: Transport failed to get client conn for www.google.com:443: http2: no cached connection was available
2024/10/30 20:58:37 http2: Transport creating client conn 0x4000216000 to 142.251.39.100:443
2024/10/30 20:58:37 http2: Transport encoding header ":authority" = "www.google.com"
2024/10/30 20:58:37 http2: Transport encoding header ":method" = "GET"
2024/10/30 20:58:37 http2: Transport encoding header ":path" = "/"
2024/10/30 20:58:37 http2: Transport encoding header ":scheme" = "https"
2024/10/30 20:58:37 http2: Transport encoding header "accept-encoding" = "gzip"
2024/10/30 20:58:37 http2: Transport encoding header "user-agent" = "Go-http-client/2.0"
2024/10/30 20:58:37 http2: Transport received SETTINGS len=18, settings: MAX_CONCURRENT_STREAMS=100, INITIAL_WINDOW_SIZE=1048576, MAX_HEADER_LIST_SIZE=65536
2024/10/30 20:58:37 http2: Transport received WINDOW_UPDATE len=4 (conn) incr=983041
2024/10/30 20:58:37 http2: Transport received SETTINGS flags=ACK len=0
2024/10/30 20:58:37 http2: Transport received HEADERS flags=END_HEADERS stream=1 len=844
2024/10/30 20:58:37 http2: Transport received DATA flags=PADDED stream=1 len=5932 data="\x1f\(5569 bytes omitted)
2024/10/30 20:58:37 http2: Transport received DATA flags=PADDED stream=1 len=305
2024/10/30 20:58:37 http2: Transport received DATA flags=PADDED stream=1 len=3485 data="ӏ_6\x81!" (3209 bytes omitted)
2024/10/30 20:58:37 http2: Transport received DATA flags=END_STREAM stream=1 len=0 data=""
2024/10/30 20:58:37 http2: Transport received PING len=8 ping="\x00\x00\x00\x00\x00\x00\x020"
200 OK