// Logger wraps a handler with basic HTTP logging
func Logger(
globalContext *context.GlobalContext,
) func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
localContext := context.Get(r)
localContext.Logger = logger.New()
t0 := time.Now()
localContext.Logger.WriteString("====\n")
localContext.Logger.Printf(
"[%s] %s %s",
r.Method,
r.RemoteAddr,
r.URL.String(),
)
next.ServeHTTP(w, r)
localContext.Logger.Printf("FINISHED IN %v", time.Now().Sub(t0))
loggerMutex.Lock()
_, err := localContext.Logger.WriteTo(globalContext.LogOut)
loggerMutex.Unlock()
if err != nil {
panic(err)
}
})
}
}
// Refresh fetches new auth tokens for an existing session that has
// expired.
func Refresh(globalContext *context.GlobalContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
localContext := context.Get(r)
tokens, err := spotify.RefreshAuthTokens(
localContext.AuthTokens,
globalContext.Spotify.ClientID,
globalContext.Spotify.ClientSecret,
)
if err != nil {
panic(err)
}
data := map[string]interface{}{
"expires_in": tokens.ExpiresIn,
}
jsonToken, err := json.Marshal(tokens)
if err != nil {
panic(err)
}
token, err := crypto.Encrypt(string(jsonToken))
if err != nil {
panic(err)
}
data["token"] = token
w.Header().Set("Content-type", "application/json")
err = json.NewEncoder(w).Encode(data)
if err != nil {
panic(err)
}
}
}
// TokenParser looks for a "token" GET parameter, decrypts and parses
// it, and kills the request if anything fails along the way.
func TokenParser(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
localContext := context.Get(r)
token := r.URL.Query().Get("token")
decryptedToken, err := crypto.Decrypt(token)
if err != nil {
panic(err)
}
err = json.Unmarshal([]byte(decryptedToken), &localContext.AuthTokens)
if err != nil {
panic(err)
}
if localContext.AuthTokens.AccessToken == "" {
panic(errors.New("Missing access token"))
}
if localContext.AuthTokens.RefreshToken == "" {
panic(errors.New("Missing refresh token"))
}
next.ServeHTTP(w, r)
})
}
// Submit fires off a goroutine to actually mix the selected playlists
// into the destination list with the specified options.
func Submit(globalContext *context.GlobalContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
localContext := context.Get(r)
userID, err := spotify.GetUserID(localContext.AuthTokens)
if err != nil {
panic(err)
}
data := submissionData{}
err = json.NewDecoder(r.Body).Decode(&data)
if err != nil {
panic(err)
}
go mixPlaylists(globalContext, localContext, userID, data)
}
}
// Playlists fetches and returns a list of the user's playlists as
// JSON.
func Playlists(w http.ResponseWriter, r *http.Request) {
localContext := context.Get(r)
userID, err := spotify.GetUserID(localContext.AuthTokens)
if err != nil {
panic(err)
}
playlists, err := spotify.GetPlaylists(localContext.AuthTokens, userID)
if err != nil {
panic(err)
}
result := map[string]interface{}{
"userID": userID,
"playlists": playlists,
}
w.Header().Set("Content-type", "application/json")
err = json.NewEncoder(w).Encode(result)
if err != nil {
panic(err)
}
}