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|
package main
import (
"database/sql/driver"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"net/http"
"strings"
"time"
)
type Api interface {
AuthGetToken(*http.Request) (ApiResponse, error)
AuthGetSession(*http.Request) (ApiResponse, error)
AuthGetMobileSession(*http.Request) (ApiResponse, error)
TrackScrobble(*http.Request) (ApiResponse, error)
}
type ApiResponse interface {
}
type SuspendScrobbles Scrobbles
func (s Scrobbles) MarshalJSON() ([]byte, error) {
return json.Marshal(&struct {
Tag SuspendScrobbles `json:"scrobbles"`
}{Tag: SuspendScrobbles(s)})
}
type Name struct {
XMLName xml.Name
}
type Token struct {
XMLName xml.Name `xml:"token" json:"-"`
Val string `xml:",innerxml" json:"token"`
Created time.Time `xml:"-" json:"-"`
UserId int `xml:"-" json:"-"`
}
type LFMResponse struct {
XMLName xml.Name `xml:"lfm" json:"-"`
Status string `xml:"status,attr" json:"-"`
Response ApiResponse
}
type Attrs struct {
Accepted int `xml:"accepted,attr" json:"accepted"`
Ignored int `xml:"ignored,attr" json:"ignored"`
}
type Scrobbles struct {
XMLName xml.Name `xml:"scrobbles" json:"-"`
Scrobbles []Scrobble `xml:"scrobble" json:"scrobble"`
Attrs `json:"@attr"`
}
type Correctable struct {
Name string `xml:",chardata" json:"#text"`
Corrected int `xml:"corrected,attr" json:"corrected"`
}
func (field Correctable) Value() (driver.Value, error) {
return field.Name, nil
}
func NewCorrectable(name string) Correctable {
return Correctable{
Name: name,
}
}
func (field Correctable) String() string {
return field.Name
}
func (n Name) getName() string {
return n.XMLName.Local
}
func (store *SqlStore) AuthGetToken(r *http.Request) (ApiResponse, error) {
if token, err := store.NewToken(); err != nil {
return nil, err
} else {
return Token{Val: token}, nil
}
}
func (store *SqlStore) AuthGetMobileSession(r *http.Request) (ApiResponse, error) {
return nil, nil
}
func (store *SqlStore) VerifySig(r *http.Request) error {
key := r.FormValue("api_key")
token := r.FormValue("token")
sig := r.FormValue("api_sig")
method := r.FormValue("method")
if c, err := store.GetClient(key); err != nil {
return errors.New("Invalid API key")
} else {
to_hash := fmt.Sprintf("api_key%smethod%stoken%s%s",
key, method, token, c.Secret)
if md5hex(to_hash) == sig {
return nil
} else {
return errors.New("Invalid method signature supplied")
}
}
}
func (store *SqlStore) AuthGetSession(r *http.Request) (ApiResponse, error) {
if err := store.VerifySig(r); err == nil {
if token, err := store.GetToken(r.FormValue("token")); err != nil {
// FIXME: error 4
return nil, errors.New("Invalid authentication token supplied")
} else {
if time.Since(token.Created) > 5*time.Minute {
// FIXME: error 15
return nil, errors.New("This token has expired")
} else {
if token.UserId != 0 {
user := &User{Id: token.UserId}
if err := store.GetUser(user); err != nil {
return nil, err
} else {
session := &Session{
User: user.Name,
Key: randomToken(16),
Client: r.FormValue("api_key"),
UserId: user.Id,
Protocol: "2.0",
}
store.PutSession(session)
return session, nil
}
} else {
//FIXME: error 14
return nil, errors.New("This token has not been authorized")
}
}
}
} else {
return nil, err
}
}
func (store *SqlStore) TrackScrobble(r *http.Request) (ApiResponse, error) {
if session, err := store.GetSession(r.FormValue("sk")); err != nil {
fmt.Printf("%v\n", err)
return nil, err
} else {
scrobbles, ignored := parseScrobbles(r.Form, session)
store.PutScrobbles(scrobbles)
return Scrobbles{Scrobbles: scrobbles,
Attrs: Attrs{len(scrobbles), ignored}}, nil
}
}
func (app *App) ApiHandler(w http.ResponseWriter, r *http.Request) {
method := r.FormValue("method")
var response ApiResponse
var err error
switch strings.ToLower(method) {
case "auth.gettoken":
response, err = app.AuthGetToken(r)
if err != nil {
fmt.Printf("%v\n", err)
}
case "auth.getsession":
response, err = app.AuthGetSession(r)
case "auth.getmobilesession":
response, err = app.AuthGetMobileSession(r)
case "track.scrobble":
response, err = app.TrackScrobble(r)
if err != nil {
fmt.Printf("%v\n", err)
}
}
var text []byte
switch r.FormValue("format") {
case "json":
text, _ = json.Marshal(response)
default:
xmlresponse := LFMResponse{Status: "ok",
Response: response}
text, _ = xml.Marshal(xmlresponse)
fmt.Fprint(w, xml.Header)
}
fmt.Printf("%s\n", text)
w.Write(text)
}
|
