71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
package server
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import (
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"errors"
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"math/rand"
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"time"
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"github.com/go-redis/redis"
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)
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func (r *RedisRouter) CreateInvitation(invitation []byte, timeout int, password string, serverTimeout int, urlLen int) (string, time.Time) {
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id := r.createShortUrl(urlLen)
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if timeout > serverTimeout {
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timeout = serverTimeout
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}
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r.Client.Set("mwiv:"+id, invitation, time.Duration(timeout*1000000))
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if len(password) > 0 {
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r.Client.Set("mwpw:"+id, password, time.Duration(timeout*1000000))
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}
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return id, time.Now().Add(time.Duration(timeout * 1000000)).UTC()
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}
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func (r *RedisRouter) GetInvitation(id string, password string) ([]byte, error) {
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passRequired := false
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expectedpass, err := r.Client.Get("mwpw:" + id).Result()
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if err != nil {
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passRequired = false
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} else {
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passRequired = true
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}
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if passRequired && password != expectedpass {
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return nil, errors.New("invitation get : auth failed, wrong password")
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}
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mwiv, err := r.Client.Get("mwiv:" + id).Result()
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if err != nil {
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return nil, err
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}
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return []byte(mwiv), nil
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}
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func (r *RedisRouter) AnswerInvitation(id string, timeout int, invitation []byte, serverTimeout int) time.Time {
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if timeout > serverTimeout {
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timeout = serverTimeout
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}
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r.Client.Set("mwan:"+id, invitation, time.Duration(timeout*1000000))
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return time.Now().Add(time.Duration(timeout * 1000000)).UTC()
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}
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func (r *RedisRouter) GetInvitationAnswer(id string) ([]byte, error) {
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mwan, err := r.Client.Get("mwiv:" + id).Result()
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if err != nil {
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return nil, err
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}
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return []byte(mwan), nil
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}
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func (r *RedisRouter) createShortUrl(length int) string {
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url := ""
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alphabet := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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// for not in redis
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for {
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for i := 1; i <= length; i++ {
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url += string(alphabet[rand.Intn(61)])
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}
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if r.Client.Get("mwiv:"+url).Err() == redis.Nil {
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break
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}
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}
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return url
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}
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