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het_rpc_session.go
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/
het_rpc_session.go
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package main
import (
"fmt"
"math/rand"
"sync"
)
var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
func RandStringRunes(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letterRunes[rand.Intn(len(letterRunes))]
}
return string(b)
}
type Session struct {
Login string
Useragent string
}
type SessionID struct {
ID string
}
const sessKeyLen = 10
type SessionManager struct {
mu sync.RWMutex
sessions map[SessionID]*Session
}
// factory
func NewSessManager() *SessionManager {
return &SessionManager{
mu: sync.RWMutex{},
sessions: map[SessionID]*Session{},
}
}
// implementation
// N.B. signature changes, net/rpc need this
func (sm *SessionManager) Create(in *Session, out *SessionID) error {
fmt.Println("call Create", in)
id := &SessionID{RandStringRunes(sessKeyLen)}
sm.mu.Lock()
sm.sessions[*id] = in
sm.mu.Unlock()
*out = *id
return nil
}
func (sm *SessionManager) Check(in *SessionID, out *Session) error {
fmt.Println("call Check", in)
sm.mu.RLock()
defer sm.mu.RUnlock()
if sess, ok := sm.sessions[*in]; ok {
*out = *sess
}
return nil
}
func (sm *SessionManager) Delete(in *SessionID, out *int) error {
fmt.Println("call Delete", in)
sm.mu.Lock()
defer sm.mu.Unlock()
delete(sm.sessions, *in)
*out = 1
return nil
}