func ExampleGet() {
c, _ := redis.Dial("tcp", ":6379")
defer c.Close()
hc := hdis.Conn{c}
key := "object:1234567"
hc.Set(key, "The value")
value, _ := redis.String(hc.Get(key))
fmt.Printf("%v\n", value)
// Delete the hash if it exists
if exists, _ := redis.Bool(hc.Do("HEXISTS", key)); exists {
_, err := hc.Do("HDEL", key)
if err != nil {
fmt.Println(err)
}
}
// Execute invalid hash command
_, err := hc.Do("GET", "sample-key")
if err == hdis.NotAHashCommandError {
fmt.Println("Invalid hash command")
} else {
fmt.Println(err)
}
// Output:
// The value
// Invalid hash command
}
func (user *User) Profile(attribute string) string {
conn := RedisPool.Get()
defer conn.Close()
hc := hdis.Conn{conn}
attr, _ := redis.String(hc.Get("u:" + user.Id + ":" + strings.ToLower(attribute)))
return attr
}
func (user *User) PreLogin(c *Context) error {
if user.Id != "" {
conn := RedisPool.Get()
defer conn.Close()
hc := hdis.Conn{conn}
previousPicture, _ = redis.String(hc.Get("u:" + user.Id + ":picture"))
}
return nil
}
func Fetch(pId string) (*Project, error) {
c := redisPool.Get()
defer c.Close()
var project Project
hc := hdis.Conn{c}
p, err := redis.Bytes(hc.Get("p:" + pId))
if err != nil {
return nil, err
}
buffer := bytes.NewBuffer(p)
dec := gob.NewDecoder(buffer)
dec.Decode(&project)
return &project, nil
}
func newContext(w http.ResponseWriter, r *http.Request) (*Context, error) {
context := &Context{Response: w, Request: r}
// Create a session and store it in cookie so that we can recognize the user when he/she gets back
// TODO: read session/cookie name from config
var err error
context.Session, err = sessionStore.Get(r, "gapp")
if err != nil {
log.Printf("error in getting session store: %q", err)
}
// Changed maximum age of the session to one month
context.Session.Options = &sessions.Options{
Path: "/",
MaxAge: 86400 * 30,
}
// Generate new userid if there isn't any
userid, ok := context.Session.Values["userid"].(string)
if !ok {
// It's an anonymous user
userid = utils.GenId(16)
context.Session.Values["userid"] = userid
} else {
// Let's fetch user's profile
conn := RedisPool.Get()
defer conn.Close()
hc := hdis.Conn{conn}
key := "u:" + userid + ":gob"
if ok, _ := redis.Bool(hc.Do("HEXISTS", key)); ok {
u, err := redis.Bytes(hc.Get(key))
if err == nil {
var user *User
buffer := bytes.NewBuffer(u)
dec := gob.NewDecoder(buffer)
err = dec.Decode(&user)
if err == nil {
context.User = user
} else {
log.Printf("error in decoding user's (%s) profile: %q", userid, err)
}
} else {
log.Printf("error in fetching user's (%s) profile from redis: %q", userid, err)
}
}
}
if context.User == nil {
context.User = &User{Id: userid, Name: "Anonymous"}
}
// Saving session everytime it gets access helps to push expiry date further
err = context.Session.Save(r, w)
return context, err
}
