service/lgtm.go
package service
import (
"encoding/xml"
"fmt"
"net/http"
"net/url"
"strings"
)
type (
LGTM struct{}
// <html><body>You are being <a href="https://lgtm.lol/i/244?random">redirected</a>.</body></html>%
LGTMResponseHTML struct {
Anchor struct {
Href string `xml:"href,attr"`
} `xml:"body>a"`
}
// [](https://lgtm.lol/i/244)
)
func (lgtm LGTM) Random() (string, string, error) {
client := &http.Client{
CheckRedirect: func(req *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
},
}
res, err := client.Get("https://lgtm.lol/random")
if err != nil {
return "", "", fmt.Errorf("http error: %v", err)
}
defer res.Body.Close()
payload := LGTMResponseHTML{}
if err := xml.NewDecoder(res.Body).Decode(&payload); err != nil {
return "", "", fmt.Errorf("failed to decode response: %v", err.Error())
}
u, err := url.Parse(payload.Anchor.Href)
if err != nil {
return "", "", fmt.Errorf("invalid URL format given: %v", err.Error())
}
id := strings.Split(u.Path, "/")[2]
imgurl := fmt.Sprintf("%s://%s/p/%s", u.Scheme, u.Host, id)
mrkdwn := fmt.Sprintf("[](%[1]s://%[2]s/i/%[3]s)", u.Scheme, u.Host, id)
return imgurl, mrkdwn, nil
}