56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
package lastfm
|
|
|
|
import (
|
|
"crypto/md5"
|
|
"encoding/hex"
|
|
"encoding/xml"
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
baseURL = "http://ws.audioscrobbler.com/2.0/"
|
|
client = &http.Client{
|
|
Timeout: 10 * time.Second,
|
|
}
|
|
)
|
|
|
|
func getParamSignature(params url.Values, secret string) string {
|
|
toHash := ""
|
|
for k, v := range params {
|
|
toHash += k
|
|
toHash += v[0]
|
|
}
|
|
toHash += secret
|
|
hash := md5.Sum([]byte(toHash))
|
|
return hex.EncodeToString(hash[:])
|
|
}
|
|
|
|
func GetSession(apiKey, secret, token string) (error, string) {
|
|
params := url.Values{}
|
|
// the first 3 parameters here must be in alphabetical order
|
|
params.Add("api_key", apiKey)
|
|
params.Add("method", "auth.getSession")
|
|
params.Add("token", token)
|
|
params.Add("api_sig", getParamSignature(params, secret))
|
|
req, _ := http.NewRequest("GET", baseURL, nil)
|
|
req.URL.RawQuery = params.Encode()
|
|
resp, err := client.Do(req)
|
|
if err != nil {
|
|
return fmt.Errorf("error when making request to last.fm: %v", err), ""
|
|
}
|
|
defer resp.Body.Close()
|
|
decoder := xml.NewDecoder(resp.Body)
|
|
var lastfm LastFM
|
|
err = decoder.Decode(&lastfm)
|
|
if err != nil {
|
|
return fmt.Errorf("error when decoding last.fm response: %v", err), ""
|
|
}
|
|
if lastfm.Error != nil {
|
|
return fmt.Errorf("error when parsing last.fm response: %v", lastfm.Error.Value), ""
|
|
}
|
|
return nil, lastfm.Session.Key
|
|
}
|