parseTitle.go

package main

import (
	"encoding/json"
	"fmt"
	"github.com/PuerkitoBio/goquery"
	"net/http"
)

type PageData struct {
	Title string
	err   string
}

func main() {
	http.HandleFunc("/", handler)
	http.ListenAndServe(":8000", nil)
}

func httpget(url string) PageData {
	var pd PageData
	response, err := http.Get(url)
	if err != nil {
		pd.err = fmt.Sprintf("%s", err)
	} else {
		pd.Title = parseTitle(response)
	}
	return pd
}

func handler(w http.ResponseWriter, r *http.Request) {
	url := r.FormValue("url")
	var pd PageData = httpget(url)
	json_out, err := json.Marshal(pd)
	if err != nil {
		fmt.Fprintf(w, "{\"Err\":\"%s\"}", err)
	}
	fmt.Fprintf(w, "%s", json_out)
}

func parseTitle(r *http.Response) string {
	doc, err := goquery.NewDocumentFromResponse(r)
	if err != nil {
		return fmt.Sprintf("%s", err)
	}
	title := doc.Find("title").Text()
	return title
}