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package server
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import (
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"encoding/binary"
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log "github.com/sirupsen/logrus"
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"net/http"
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"time"
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"github.com/boltdb/bolt"
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gmux "github.com/gorilla/mux"
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)
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var Uint32 = binary.BigEndian.Uint32
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var Uint64 = binary.BigEndian.Uint64
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var PutUint32 = binary.BigEndian.PutUint32
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var PutUint64 = binary.BigEndian.PutUint64
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func i64ToB(value int64) []byte {
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oct := make([]byte, 8)
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PutUint64(oct, uint64(value))
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return oct
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}
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func i32ToB(value int32) []byte {
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nib := make([]byte, 4)
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PutUint32(nib, uint32(value))
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return nib
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}
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type localManager struct {
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db *bolt.DB
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Router *gmux.Router
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}
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func MakeLocalManager(dbPath string) (*localManager, error) {
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db, err := bolt.Open(dbPath, 0600, nil)
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if err != nil {
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return nil, err
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}
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ret := &localManager{
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db: db,
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}
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ret.Router = ret.registerMux()
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return ret, nil
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}
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func corsMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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next.ServeHTTP(w, r)
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})
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}
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func (manager *localManager) registerMux() *gmux.Router {
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r := gmux.NewRouter()
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r.HandleFunc("/admin/users", manager.listAllUsersHlr).Methods("GET")
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r.HandleFunc("/admin/users/{UID}", manager.getUserInfoHlr).Methods("GET")
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r.HandleFunc("/admin/users/{UID}", manager.writeUserInfoHlr).Methods("POST")
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r.HandleFunc("/admin/users/{UID}", manager.deleteUserHlr).Methods("DELETE")
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r.Methods("OPTIONS").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Methods", "GET,POST,DELETE,OPTIONS")
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})
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r.Use(corsMiddleware)
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return r
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}
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func (manager *localManager) authenticateUser(UID []byte) (int64, int64, error) {
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var upRate, downRate, upCredit, downCredit, expiryTime int64
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err := manager.db.View(func(tx *bolt.Tx) error {
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bucket := tx.Bucket(UID)
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if bucket == nil {
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return ErrUserNotFound
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}
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upRate = int64(Uint64(bucket.Get([]byte("UpRate"))))
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downRate = int64(Uint64(bucket.Get([]byte("DownRate"))))
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upCredit = int64(Uint64(bucket.Get([]byte("UpCredit"))))
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downCredit = int64(Uint64(bucket.Get([]byte("DownCredit"))))
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expiryTime = int64(Uint64(bucket.Get([]byte("ExpiryTime"))))
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return nil
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})
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if err != nil {
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return 0, 0, err
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}
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if upCredit <= 0 {
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return 0, 0, ErrNoUpCredit
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}
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if downCredit <= 0 {
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return 0, 0, ErrNoDownCredit
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}
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if expiryTime < time.Now().Unix() {
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return 0, 0, ErrUserExpired
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}
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return upRate, downRate, nil
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}
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func (manager *localManager) authoriseNewSession(user *ActiveUser) error {
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var sessionsCap int
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var upCredit, downCredit, expiryTime int64
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err := manager.db.View(func(tx *bolt.Tx) error {
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bucket := tx.Bucket(user.arrUID[:])
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if bucket == nil {
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return ErrUserNotFound
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}
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sessionsCap = int(Uint32(bucket.Get([]byte("SessionsCap"))))
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upCredit = int64(Uint64(bucket.Get([]byte("UpCredit"))))
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downCredit = int64(Uint64(bucket.Get([]byte("DownCredit"))))
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expiryTime = int64(Uint64(bucket.Get([]byte("ExpiryTime"))))
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return nil
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})
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if err != nil {
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return err
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}
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if upCredit <= 0 {
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return ErrNoUpCredit
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}
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if downCredit <= 0 {
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return ErrNoDownCredit
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}
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if expiryTime < time.Now().Unix() {
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return ErrUserExpired
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}
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//user.sessionsM.RLock()
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if len(user.sessions) >= sessionsCap {
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//user.sessionsM.RUnlock()
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return ErrSessionsCapReached
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}
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//user.sessionsM.RUnlock()
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return nil
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}
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func (manager *localManager) uploadStatus(uploads []statusUpdate) ([]statusResponse, error) {
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var responses []statusResponse
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err := manager.db.Update(func(tx *bolt.Tx) error {
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for _, status := range uploads {
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var resp statusResponse
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bucket := tx.Bucket(status.UID)
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if bucket == nil {
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resp = statusResponse{
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status.UID,
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TERMINATE,
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"User no longer exists",
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}
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responses = append(responses, resp)
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continue
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}
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oldUp := int64(Uint64(bucket.Get([]byte("UpCredit"))))
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newUp := oldUp - status.upUsage
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if newUp <= 0 {
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resp = statusResponse{
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status.UID,
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TERMINATE,
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"No upload credit left",
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}
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responses = append(responses, resp)
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continue
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}
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err := bucket.Put([]byte("UpCredit"), i64ToB(newUp))
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if err != nil {
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log.Error(err)
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continue
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}
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oldDown := int64(Uint64(bucket.Get([]byte("DownCredit"))))
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newDown := oldDown - status.downUsage
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if newDown <= 0 {
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resp = statusResponse{
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status.UID,
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TERMINATE,
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"No download credit left",
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}
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responses = append(responses, resp)
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continue
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}
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err = bucket.Put([]byte("DownCredit"), i64ToB(newDown))
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if err != nil {
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log.Error(err)
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continue
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}
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expiry := int64(Uint64(bucket.Get([]byte("ExpiryTime"))))
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if time.Now().Unix() > expiry {
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resp = statusResponse{
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status.UID,
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TERMINATE,
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"User has expired",
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}
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responses = append(responses, resp)
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continue
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}
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}
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return nil
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})
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return responses, err
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}
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