// Connect to remote instance of Redis using a URL.
func ExampleDialURL() {
c, err := redis.DialURL(os.Getenv("REDIS_URL"))
if err != nil {
// handle connection error
}
defer c.Close()
}
func newRedisPool(serverURL, db string) *redis.Pool {
return &redis.Pool{
MaxIdle: 3,
IdleTimeout: 120 * time.Second,
Dial: func() (redis.Conn, error) {
c, err := redis.DialURL(serverURL)
if err != nil {
return nil, err
}
if _, err := c.Do("SELECT", db); err != nil {
c.Close()
return nil, err
}
return c, err
},
TestOnBorrow: func(c redis.Conn, t time.Time) error {
diff := time.Now().Sub(t)
// if the client has not been used for 60 seconds ping it before handing it out
if diff.Seconds() >= 60 {
_, err := c.Do("PING")
return err
}
return nil
},
Wait: true,
}
}
func TestDialURL(t *testing.T) {
for _, d := range dialErrors {
_, err := redis.DialURL(d.rawurl)
if err == nil || !strings.Contains(err.Error(), d.expectedError) {
t.Errorf("DialURL did not return expected error (expected %v to contain %s)", err, d.expectedError)
}
}
checkPort := func(network, address string) (net.Conn, error) {
if address != "localhost:6379" {
t.Errorf("DialURL did not set port to 6379 by default (got %v)", address)
}
return net.Dial(network, address)
}
c, err := redis.DialURL("redis://localhost", redis.DialNetDial(checkPort))
if err != nil {
t.Error("dial error:", err)
}
c.Close()
checkHost := func(network, address string) (net.Conn, error) {
if address != "localhost:6379" {
t.Errorf("DialURL did not set host to localhost by default (got %v)", address)
}
return net.Dial(network, address)
}
c, err = redis.DialURL("redis://:6379", redis.DialNetDial(checkHost))
if err != nil {
t.Error("dial error:", err)
}
c.Close()
// Check that the database is set correctly
c1, err := redis.DialURL("redis://:6379/8")
defer c1.Close()
if err != nil {
t.Error("Dial error:", err)
}
dbSize, _ := redis.Int(c1.Do("DBSIZE"))
if dbSize > 0 {
t.Fatal("DB 8 has existing keys; aborting test to avoid overwriting data")
}
c1.Do("SET", "var", "val")
c2, err := redis.Dial("tcp", ":6379")
defer c2.Close()
if err != nil {
t.Error("dial error:", err)
}
_, err = c2.Do("SELECT", "8")
if err != nil {
t.Error(err)
}
got, err := redis.String(c2.Do("GET", "var"))
if err != nil {
t.Error(err)
}
if got != "val" {
t.Error("DialURL did not correctly set the db.")
}
_, err = c2.Do("DEL", "var")
}