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Code Issues Releases Activity

Strengthens the session's function

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This commit is contained in:
astaxie
2013-09-26 18:07:00 +08:00
parent 59a67720b4
commit 02c2e16253
5 changed files with 397 additions and 135 deletions
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142
session/session.go
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@ -1,8 +1,12 @@
package session
import (
"crypto/hmac"
"crypto/md5"
"crypto/rand"
"crypto/sha1"
"encoding/base64"
"encoding/hex"
"fmt"
"io"
"net/http"
@ -16,11 +20,13 @@ type SessionStore interface {
Delete(key interface{}) error //delete session value
SessionID() string //back current sessionID
SessionRelease() // release the resource
Flush() error //delete all data
}
type Provider interface {
SessionInit(maxlifetime int64, savePath string) error
SessionRead(sid string) (SessionStore, error)
SessionRegenerate(oldsid, sid string) (SessionStore, error)
SessionDestroy(sid string) error
SessionGC()
}
@ -44,40 +50,91 @@ type Manager struct {
cookieName string //private cookiename
provider Provider
maxlifetime int64
hashfunc string //support md5 & sha1
hashkey string
options []interface{}
}
//options
//1. is https default false
//2. hashfunc default sha1
//3. hashkey default beegosessionkey
//4. maxage default is none
func NewManager(provideName, cookieName string, maxlifetime int64, savePath string, options ...interface{}) (*Manager, error) {
provider, ok := provides[provideName]
if !ok {
return nil, fmt.Errorf("session: unknown provide %q (forgotten import?)", provideName)
}
provider.SessionInit(maxlifetime, savePath)
return &Manager{provider: provider, cookieName: cookieName, maxlifetime: maxlifetime, options: options}, nil
hashfunc := "sha1"
if len(options) > 1 {
hashfunc = options[1].(string)
}
hashkey := "beegosessionkey"
if len(options) > 2 {
hashkey = options[2].(string)
}
return &Manager{
provider: provider,
cookieName: cookieName,
maxlifetime: maxlifetime,
hashfunc: hashfunc,
hashkey: hashkey,
options: options,
}, nil
}
//get Session
func (manager *Manager) SessionStart(w http.ResponseWriter, r *http.Request) (session SessionStore) {
cookie, err := r.Cookie(manager.cookieName)
maxage := -1
if len(manager.options) > 3 {
switch manager.options[3].(type) {
case int:
if manager.options[3].(int) > 0 {
maxage = manager.options[3].(int)
} else if manager.options[3].(int) < 0 {
maxage = 0
}
case int64:
if manager.options[3].(int64) > 0 {
maxage = int(manager.options[3].(int64))
} else if manager.options[3].(int64) < 0 {
maxage = 0
}
case int32:
if manager.options[3].(int32) > 0 {
maxage = int(manager.options[3].(int32))
} else if manager.options[3].(int32) < 0 {
maxage = 0
}
}
}
if err != nil || cookie.Value == "" {
sid := manager.sessionId()
sid := manager.sessionId(r)
session, _ = manager.provider.SessionRead(sid)
secure := false
if len(manager.options) > 0 {
secure = manager.options[0].(bool)
}
cookie := http.Cookie{Name: manager.cookieName,
cookie = &http.Cookie{Name: manager.cookieName,
Value: url.QueryEscape(sid),
Path: "/",
HttpOnly: true,
Secure: secure}
if maxage >= 0 {
cookie.MaxAge = maxage
}
//cookie.Expires = time.Now().Add(time.Duration(manager.maxlifetime) * time.Second)
http.SetCookie(w, &cookie)
r.AddCookie(&cookie)
http.SetCookie(w, cookie)
r.AddCookie(cookie)
} else {
//cookie.Expires = time.Now().Add(time.Duration(manager.maxlifetime) * time.Second)
cookie.HttpOnly = true
cookie.Path = "/"
if maxage >= 0 {
cookie.MaxAge = maxage
}
http.SetCookie(w, cookie)
sid, _ := url.QueryUnescape(cookie.Value)
session, _ = manager.provider.SessionRead(sid)
@ -103,10 +160,81 @@ func (manager *Manager) GC() {
time.AfterFunc(time.Duration(manager.maxlifetime)*time.Second, func() { manager.GC() })
}
func (manager *Manager) sessionId() string {
func (manager *Manager) SessionRegenerateId(w http.ResponseWriter, r *http.Request) (session SessionStore) {
sid := manager.sessionId(r)
cookie, err := r.Cookie(manager.cookieName)
if err != nil && cookie.Value == "" {
//delete old cookie
session, _ = manager.provider.SessionRead(sid)
secure := false
if len(manager.options) > 0 {
secure = manager.options[0].(bool)
}
cookie = &http.Cookie{Name: manager.cookieName,
Value: url.QueryEscape(sid),
Path: "/",
HttpOnly: true,
Secure: secure,
}
} else {
oldsid, _ := url.QueryUnescape(cookie.Value)
session, _ = manager.provider.SessionRegenerate(oldsid, sid)
cookie.Value = url.QueryEscape(sid)
cookie.HttpOnly = true
cookie.Path = "/"
}
maxage := -1
if len(manager.options) > 3 {
switch manager.options[3].(type) {
case int:
if manager.options[3].(int) > 0 {
maxage = manager.options[3].(int)
} else if manager.options[3].(int) < 0 {
maxage = 0
}
case int64:
if manager.options[3].(int64) > 0 {
maxage = int(manager.options[3].(int64))
} else if manager.options[3].(int64) < 0 {
maxage = 0
}
case int32:
if manager.options[3].(int32) > 0 {
maxage = int(manager.options[3].(int32))
} else if manager.options[3].(int32) < 0 {
maxage = 0
}
}
}
if maxage >= 0 {
cookie.MaxAge = maxage
}
http.SetCookie(w, cookie)
r.AddCookie(cookie)
return
}
//remote_addr cruunixnano randdata
func (manager *Manager) sessionId(r *http.Request) (sid string) {
b := make([]byte, 24)
if _, err := io.ReadFull(rand.Reader, b); err != nil {
return ""
}
return base64.URLEncoding.EncodeToString(b)
bs := base64.URLEncoding.EncodeToString(b)
sig := fmt.Sprintf("%s%d%s", r.RemoteAddr, time.Now().UnixNano(), bs)
if manager.hashfunc == "md5" {
h := md5.New()
h.Write([]byte(bs))
sid = fmt.Sprintf("%s", hex.EncodeToString(h.Sum(nil)))
} else if manager.hashfunc == "sha1" {
h := hmac.New(sha1.New, []byte(manager.hashkey))
fmt.Fprintf(h, "%s", sig)
sid = fmt.Sprintf("%s", hex.EncodeToString(h.Sum(nil)))
} else {
h := hmac.New(sha1.New, []byte(manager.hashkey))
fmt.Fprintf(h, "%s", sig)
sid = fmt.Sprintf("%s", hex.EncodeToString(h.Sum(nil)))
}
return
}