HTTP GET read body -> replace strings -> write to buffer

ReaderReplacerWriter.go

package main

import (
	"bufio"
	"bytes"
	"log"
	"net/http"
	"strings"
)

func main() {
	resp, err := http.Get("http://google.com/")
	if err != nil {
		log.Println(err)
	}

	//	our replace rules
	replacer := strings.NewReplacer(
		"<div", "<foo",
	)

	//	buffer to hold our output from the replacer
	var buf bytes.Buffer

	//	scan the body and replace strings based on our reaplce rules
	scanner := bufio.NewScanner(resp.Body)
	for scanner.Scan() {
		//	apply replacer rules and save to our buffer
		replacer.WriteString(&buf, scanner.Text())
	}
	if err := scanner.Err(); err != nil {
		log.Println("reading standard input:", err)
	}

	//	our output with the modified string
	log.Println(buf.String())
}