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main.go
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main.go
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package main
import (
"fmt"
"net/http"
"os"
"golang.org/x/net/html"
)
const URL = "https://phillipsbeer.com/growlers/"
func main() {
resp, err := http.Get(URL)
if err != nil {
fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())
os.Exit(1)
}
defer resp.Body.Close()
tokenizer := html.NewTokenizer(resp.Body)
for {
t := tokenizer.Next()
switch {
case t == html.ErrorToken:
return
case t == html.StartTagToken:
token := tokenizer.Token()
if isABeerName(token) {
t = tokenizer.Next()
if t == html.TextToken {
fmt.Printf("- %s\n", tokenizer.Token())
}
}
}
}
}
func isABeerName(token html.Token) bool {
if token.Data == "span" {
for _, attr := range token.Attr {
if attr.Key == "class" && attr.Val == "beer-name" {
return true
}
}
}
return false
}