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package main
import (
"errors"
"fmt"
"log"
"net/http"
"net/url"
"strconv"
"strings"
"time"
)
func (app *App) mainHandler(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
if _, ok := r.Form["hs"]; ok {
protocol := r.FormValue("p")
if protocol != "1.2.1" && protocol != "1.2" {
fmt.Fprintln(w, "FAILED Protocol mismatch")
return
}
timestamp := r.FormValue("t")
ts, err := strconv.ParseInt(timestamp, 10, 0)
if err != nil {
fmt.Fprintln(w, "FAILED Invalid timestamp")
return
}
delta := time.Now().Unix() - ts
if delta > 30 || delta < -30 {
fmt.Fprintln(w, "BADTIME")
return
}
user := r.FormValue("u")
auth := r.FormValue("a")
password, err := app.GetPassword(user)
if (md5hex(password+timestamp) != auth) || err != nil {
fmt.Fprintln(w, "BADAUTH")
return
}
client := r.FormValue("c")
s := NewSession(user, client, protocol)
app.PutSession(s)
fmt.Fprintln(w, "OK")
fmt.Fprintf(w, "%s\n", s.Key)
fmt.Fprintln(w, "http://post.audioscrobbler.com:80/np")
fmt.Fprintln(w, "http://post.audioscrobbler.com:80/scrobble")
} else {
fmt.Fprintf(w, "<html>This is an endpoint, see <a href=\"http://www.last.fm/api/submissions\">here</a></html>")
}
}
func parseValues(values url.Values) map[int]url.Values {
parts := make(map[int]url.Values)
var field string
for key, value := range values {
splitted_key := strings.SplitN(key, "[", 2)
if len(splitted_key) < 2 {
continue
}
field = splitted_key[0]
idx, err := strconv.Atoi(strings.TrimSuffix(splitted_key[1], "]"))
if err != nil {
continue
} else {
if _, ok := parts[idx]; !ok {
parts[idx] = make(url.Values)
}
parts[idx][field] = value
}
}
return parts
}
func parsePart1(values url.Values) (Scrobble, error) {
var scrobble Scrobble
scrobble.TrackName = NewCorrectable(values.Get("t"))
scrobble.Artist = NewCorrectable(values.Get("a"))
if t, err := strconv.Atoi(values.Get("i")); err != nil {
return scrobble, errors.New("Could not parse timestamp")
} else {
scrobble.Time = time.Unix(int64(t), 0)
}
scrobble.Album = NewCorrectable(values.Get("b"))
scrobble.Mbid = values.Get("m")
if tn, err := strconv.Atoi(values.Get("n")); err != nil {
return scrobble, errors.New("Could not parse track number")
} else {
scrobble.TrackNumber = tn
}
if duration, err := strconv.Atoi(values.Get("l")); err != nil {
return scrobble, errors.New("Could not parse duration")
} else {
scrobble.Duration = duration
}
chosen := values.Get("o")
if chosen == "P" || chosen == "" {
scrobble.Chosen = true
}
return scrobble, nil
}
func parsePart2(values url.Values) (Scrobble, error) {
var scrobble Scrobble
scrobble.TrackName = NewCorrectable(values.Get("track"))
scrobble.Artist = NewCorrectable(values.Get("artist"))
if t, err := strconv.Atoi(values.Get("timestamp")); err != nil {
return scrobble, errors.New("Could not parse timestamp")
} else {
scrobble.Time = time.Unix(int64(t), 0)
}
scrobble.Album = NewCorrectable(values.Get("album"))
scrobble.Mbid = values.Get("mbid")
if tn, ok := values["trackNumber"]; ok {
if tn, err := strconv.Atoi(tn[0]); err != nil {
return scrobble, errors.New("Could not parse track number")
} else {
scrobble.TrackNumber = tn
}
}
if duration, err := strconv.Atoi(values.Get("duration")); err != nil {
return scrobble, errors.New("Could not parse duration")
} else {
scrobble.Duration = duration
}
chosen := values.Get("chosenByUser")
if chosen == "1" || chosen == "" {
scrobble.Chosen = true
}
return scrobble, nil
}
func parseScrobbles(values url.Values, session *Session) ([]Scrobble, int) {
scrobbles := make([]Scrobble, 0, 1)
parts := parseValues(values)
var parsePart func(url.Values) (Scrobble, error)
if session.Protocol == "2.0" {
parsePart = parsePart2
} else {
parsePart = parsePart1
}
ignored := 0
for i, c := 0, 0; i < 50 && c < len(parts); i++ {
if part, ok := parts[i]; ok {
c++
if scrobble, err := parsePart(part); err != nil {
fmt.Printf("%v\n", err)
ignored++
} else {
scrobble.Session = session.Key
scrobbles = append(scrobbles, scrobble)
}
}
}
return scrobbles, ignored
}
func (app *App) scrobbleHandler(w http.ResponseWriter, r *http.Request) {
if session, err := app.GetSession(r.FormValue("s")); err != nil {
fmt.Fprintln(w, "BADSESSION")
} else {
scrobbles, _ := parseScrobbles(r.Form, session)
for i, s := range scrobbles {
t := app.TrackInfo(s.TrackName.Name, s.Artist.Name)
s.Mbid = t.Mbid
scrobbles[i] = s
_, err = app.DB.Exec("INSERT INTO songs VALUES ($1, $2) "+
"ON CONFLICT (mbid) DO UPDATE SET mbid=$1, image=$2",
t.Mbid, t.GetImage("medium"))
if err != nil {
log.Println(err)
}
}
fmt.Printf("%v\n", scrobbles)
app.PutScrobbles(scrobbles)
fmt.Fprintln(w, "OK")
}
}
func (app *App) nowPlayingHandler(w http.ResponseWriter, r *http.Request) {
if _, err := app.GetSession(r.FormValue("s")); err != nil {
fmt.Fprintln(w, "BADSESSION")
} else {
fmt.Fprintln(w, "OK")
}
}
|
