How to read until a specific delimiter or marker using bufio.Reader in Go?

To read until a specific delimiter or marker using bufio.Reader in Go, you can use the ReadString() method to read until the delimiter is encountered. Here's an example:

package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	file, err := os.Open("input.txt")
	if err != nil {
		fmt.Println("Error opening file:", err)
		os.Exit(1)
	}
	defer file.Close()

	reader := bufio.NewReader(file)

	delimiter := "\n" // specify the delimiter
	for {
		line, err := reader.ReadString('\n')
		if err != nil {
			fmt.Println("Error reading file:", err)
			break
		}
		if line == delimiter {
			// Do something when delimiter is encountered
			break
		}
		// Process the line
		fmt.Print(line)
	}
}

In this example, a file named "input.txt" is being read line by line until a newline character (\n) is encountered. You can replace "\n" with any other delimiter or marker you require.