golang cookie与session

概述main // main project main.gopackage mainimport ( "fmt" "html/template" "log" "net/http" "strings" "session" _"memory" "time")func sayHelloName(w http.ResponseWriter, r *http.Request) {

main

// main project main.gopackage mainimport (	"fmt"	"HTML/template"	"log"	"net/http"	"strings"	"session"	_"memory"	"time")func sayHelloname(w http.ResponseWriter,r *http.Request) {	r.ParseForm()	fmt.Println(r.Form)	fmt.Println(r.URL.Path)	fmt.Println(r.URL.Scheme)	fmt.Println(r.Form["url_long"])	for k,v := range r.Form {		fmt.Println("key: ",k)		fmt.Println("value:",strings.Join(v,""))	}	fmt.Fprintln(w,"hello nihao")}func login(w http.ResponseWriter,r *http.Request) {	r.ParseForm()	fmt.Println("method: ",r.Method)	if r.Method == "GET" {		t,err := template.Parsefiles("src/HTML/login.gtpl")		if err != nil {			fmt.Println(err)			return		}		t.Execute(w,nil)	} else {		fmt.Println("username: ",r.Form["username"])		fmt.Println("password: ",r.Form["password"])	}}func login2(w http.ResponseWriter,r *http.Request) {	sess := globalSessions.SessionStart(w,r)	r.ParseForm()	if r.Method == "GET" {		t,_ := template.Parsefiles("src/HTML/login.gtpl")		//w.header().Set("Content-Type","text/HTML")		t.Execute(w,sess.Get("username"))	} else {		sess.Set("username",r.Form["username"])		http.Redirect(w,r,"/",302)	}}func count(w http.ResponseWriter,r)	createtime := sess.Get("createtime")	if createtime == nil {		sess.Set("createtime",time.Now().Unix())	} else if (createtime.(int64) + 360) < (time.Now().Unix()) {		globalSessions.SessionDestroy(w,r)		sess = globalSessions.SessionStart(w,r)	}	ct := sess.Get("countnum")	if ct == nil {		sess.Set("countnum",1)	} else {		sess.Set("countnum",(ct.(int) + 1))	}	t,_ := template.Parsefiles("count.gtpl")	w.header().Set("Content-Type","text/HTML")	t.Execute(w,sess.Get("countnum"))}func main() {	//http.HandleFunc("/",sayHelloname);	http.HandleFunc("/login",login)	http.HandleFunc("/login2",login2)	err := http.ListenAndServe(":9090",nil)	if err != nil {		log.Fatalf("Listen and server",err)	}}var globalSessions *session.Managerfunc init() {	globalSessions,_ = session.NewSessionManager("memory","goSessionID",3600)	go globalSessions.GC()	fmt.Println("fd")}

session

package sessionimport (	"crypto/rand"	"enCoding/base64"	"fmt"	"io"	"net/http"	"net/url"	"sync"	"time")type Manager struct {	cookiename  string	lock        sync.Mutex	provIDer    ProvIDer	maxlifeTime int64}type ProvIDer interface {	SessionInit(sID string) (Session,error)	SessionRead(sID string) (Session,error)	SessionDestroy(sID string) error	SessionGC(maxlifeTime int64)}type Session interface {	Set(key,value interface{}) error	Get(key interface{}) interface{}	Delete(ket interface{}) error	SessionID() string}func NewSessionManager(provIDename,cookiename string,maxlifeTime int64) (*Manager,error) {	provIDe,ok := provIDes[provIDename]	if !ok {		return nil,fmt.Errorf("session: unkNown provIDe %q (forgotten import?",provIDename)	}	return &Manager{cookiename: cookiename,provIDer: provIDe,maxlifeTime: maxlifeTime},nil}func Register(name string,provIDe ProvIDer) {	if provIDe == nil {		panic("session: Register provIDe is nil")	}	if _,dup := provIDes[name]; dup {		panic("session: Register called twice for provIDe " + name)	}	provIDes[name] = provIDe}var provIDes = make(map[string]ProvIDer)func (manager *Manager) sessionID() string {	b := make([]byte,32)	if _,err := io.ReadFull(rand.Reader,b); err != nil {		return ""	}	return base64.URLEnCoding.EncodetoString(b)}func (manager *Manager) SessionStart(w http.ResponseWriter,r *http.Request) (session Session) {	manager.lock.Lock()	defer manager.lock.Unlock()	cookie,err := r.cookie(manager.cookiename)	if err != nil || cookie.Value == "" {		sID := manager.sessionID()		session,_ = manager.provIDer.SessionInit(sID)		cookie := http.cookie{name: manager.cookiename,Value: url.queryEscape(sID),Path: "/",httpOnly: true,MaxAge: int(manager.maxlifeTime)}		http.setcookie(w,&cookie)	} else {		sID,_ := url.queryUnescape(cookie.Value)		session,_ = manager.provIDer.SessionRead(sID)	}	return session}func (manager *Manager) SessionDestroy(w http.ResponseWriter,r *http.Request){	cookie,err := r.cookie(manager.cookiename)	if err != nil || cookie.Value == "" {		return	} else {		manager.lock.Lock()		defer manager.lock.Unlock()		manager.provIDer.SessionDestroy(cookie.Value)		expiration := time.Now()		cookie := http.cookie{name: manager.cookiename,Expires: expiration,MaxAge: -1}		http.setcookie(w,&cookie)	}}func (manager *Manager) GC() {	manager.lock.Lock()	defer manager.lock.Unlock()	manager.provIDer.SessionGC(manager.maxlifeTime)	time.AfterFunc(time.Duration(manager.maxlifeTime),func(){ manager.GC() })}

memory

package memoryimport (	"container/List"	"time"	"sync"	"fmt"	"session")type SessionStore struct {	sID string //session ID 唯一标示	timeAccessed time.Time //最后访问时间	value map[interface{}]interface{} //session 里面存储的值}func (st *SessionStore) Set(key,value interface{}) error {	st.value[key] = value	pder.SessionUpdate(st.sID)	return nil}func (st *SessionStore) Get(key interface{}) interface{} {	pder.SessionUpdate(st.sID)	if v,ok := st.value[key]; ok {		return v	} else {		return nil	}	return nil}func (st *SessionStore) Delete(key interface{}) error {	delete(st.value,key)	pder.SessionUpdate(st.sID)	return nil}func (st *SessionStore) SessionID() string {	return st.sID}type ProvIDer struct {	lock sync.Mutex //用来锁	sessions map[string]*List.Element //用来存储在内存	List *List.List //用来做 gc}func (provIDer *ProvIDer) SessionInit(sID string) (session.Session,error) {	provIDer.lock.Lock()	defer provIDer.lock.Unlock()	v := make(map[interface{}]interface{},0)	newsess := &SessionStore{sID: sID,timeAccessed: time.Now(),value: v}	element := provIDer.List.PushBack(newsess)	provIDer.sessions[sID] = element	return newsess,nil}func (provIDer *ProvIDer) SessionRead(sID string) (session.Session,error) {	if element,ok := provIDer.sessions[sID]; ok {		return element.Value.(*SessionStore),nil	} else {		sess,err := provIDer.SessionInit(sID)		return sess,err	}	return nil,nil}func (provIDer *ProvIDer) SessionDestroy(sID string) error {	if element,ok := provIDer.sessions[sID]; ok {		delete(provIDer.sessions,sID)		provIDer.List.Remove(element)		return nil	}	return nil}func (provIDer *ProvIDer) SessionGC(maxlifeTime int64) {	provIDer.lock.Lock()	defer provIDer.lock.Unlock()	for {		element := provIDer.List.Back()		if element == nil {			break		}		if (element.Value.(*SessionStore).timeAccessed.Unix() + maxlifeTime) <		time.Now().Unix() {			provIDer.List.Remove(element)			delete(provIDer.sessions,element.Value.(*SessionStore).sID)		} else {			break		}	}}func (provIDer *ProvIDer) SessionUpdate(sID string) error {	provIDer.lock.Lock()	defer provIDer.lock.Unlock()	if element,ok := provIDer.sessions[sID]; ok {		element.Value.(*SessionStore).timeAccessed = time.Now()		provIDer.List.MovetoFront(element)		return nil	}	return nil}var pder = &ProvIDer{List: List.New()}func init() {	pder.sessions = make(map[string]*List.Element,0)	session.Register("memory",pder)	fmt.Println("wzz")}

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