func urlShortenerMain(client *http.Client, argv []string) {
if len(argv) != 1 {
fmt.Fprintf(os.Stderr, "Usage: urlshortener http://goo.gl/xxxxx (to look up details)\n")
fmt.Fprintf(os.Stderr, " urlshortener http://example.com/long (to shorten)\n")
return
}
svc, _ := urlshortener.New(client)
urlstr := argv[0]
// short -> long
if strings.HasPrefix(urlstr, "http://goo.gl/") || strings.HasPrefix(urlstr, "https://goo.gl/") {
url, err := svc.Url.Get(urlstr).Do()
if err != nil {
log.Fatalf("URL Get: %v", err)
}
fmt.Printf("Lookup of %s: %s\n", urlstr, url.LongUrl)
return
}
// long -> short
url, err := svc.Url.Insert(&urlshortener.Url{
Kind: "urlshortener#url", // Not really needed
LongUrl: urlstr,
}).Do()
if err != nil {
log.Fatalf("URL Insert: %v", err)
}
fmt.Printf("Shortened %s => %s\n", urlstr, url.Id)
}
// shortenURL returns a short URL which redirects to the provided url,
// using Google's urlshortener API.
func shortenURL(ctx context.Context, url string) (string, error) {
transport := &oauth2.Transport{
Source: google.AppEngineTokenSource(ctx, urlshortener.UrlshortenerScope),
Base: &urlfetch.Transport{Context: ctx},
}
client := &http.Client{Transport: transport}
svc, err := urlshortener.New(client)
if err != nil {
return "", err
}
resp, err := svc.Url.Insert(&urlshortener.Url{LongUrl: url}).Do()
if err != nil {
return "", err
}
return resp.Id, nil
}
func (this *Link) Shorten() (string, error) {
client := &http.Client{
Transport: &transport.APIKey{Key: os.Getenv("GOOGLE_API_KEY")},
}
svc, err := urlshortener.New(client)
if err != nil {
log.Fatalf("Unable to create UrlShortener service: %v", err)
}
url, err := svc.Url.Insert(&urlshortener.Url{
Kind: "urlshortener#url",
LongUrl: "http://iwillvote.us/?code=" + this.Hash,
}).Do()
if err != nil {
log.Fatalf("URL Insert: %v", err)
}
return url.Id, nil
}