Append some text to each line

join.go

package main

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

var parameterList []string

func permuteUrls(host string) {
	for _, param := range parameterList {
		fmt.Printf("%s?%s=[payload]\n", host, param)
	}
}

// Usage; ./join <list of urls> <list of get params>
func main() {
	paramhandle, err := os.Open(os.Args[2])
	if err != nil {
		panic(err)
	}

	defer paramhandle.Close()
	paramScanner := bufio.NewScanner(paramhandle)
	for paramScanner.Scan() {
		parameterList = append(parameterList, paramScanner.Text())
	}

	fileHandle, err := os.Open(os.Args[1])
	if err != nil {
		panic(err)
	}

	defer fileHandle.Close()
	fileScanner := bufio.NewScanner(fileHandle)

	for fileScanner.Scan() {
		permuteUrls(fileScanner.Text())
	}
}