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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,14 +1,231 @@ | ||
| package redisutil | ||
|
|
||
| import "github.com/redis/go-redis/v9" | ||
| import ( | ||
| "fmt" | ||
| "net" | ||
| "net/url" | ||
| "sort" | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
|
|
||
| func RedisClientFromURL(url string) (redis.UniversalClient, error) { | ||
| if url == "" { | ||
| "github.com/redis/go-redis/v9" | ||
| ) | ||
|
|
||
| // RedisClientFromURL creates a new Redis client based on the provided URL. | ||
| // The URL scheme can be either `redis` or `redis+sentinel`. | ||
| func RedisClientFromURL(redisUrl string) (redis.UniversalClient, error) { | ||
| if redisUrl == "" { | ||
| return nil, nil | ||
| } | ||
| redisOptions, err := redis.ParseURL(url) | ||
| u, err := url.Parse(redisUrl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if u.Scheme == "redis+sentinel" { | ||
| redisOptions, err := parseFailoverRedisUrl(redisUrl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return redis.NewFailoverClient(redisOptions), nil | ||
| } | ||
| redisOptions, err := redis.ParseURL(redisUrl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return redis.NewClient(redisOptions), nil | ||
| } | ||
|
|
||
| // Designed using https://github.com/redis/go-redis/blob/a8590e987945b7ba050569cc3b94b8ece49e99e3/options.go#L283 as reference | ||
| // Example Usage : | ||
| // | ||
| // redis+sentinel://<user>:<password>@<host1>:<port1>,<host2>:<port2>,<host3>:<port3>/<master_name/><db_number>?dial_timeout=3&db=1&read_timeout=6s&max_retries=2 | ||
| func parseFailoverRedisUrl(redisUrl string) (*redis.FailoverOptions, error) { | ||
| u, err := url.Parse(redisUrl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| o := &redis.FailoverOptions{} | ||
| o.SentinelUsername, o.SentinelPassword = getUserPassword(u) | ||
| o.SentinelAddrs = getAddressesWithDefaults(u) | ||
| f := strings.FieldsFunc(u.Path, func(r rune) bool { | ||
| return r == '/' | ||
| }) | ||
| switch len(f) { | ||
| case 0: | ||
| return nil, fmt.Errorf("redis: master name is required") | ||
| case 1: | ||
| o.DB = 0 | ||
| o.MasterName = f[0] | ||
| case 2: | ||
| o.MasterName = f[0] | ||
| var err error | ||
| if o.DB, err = strconv.Atoi(f[1]); err != nil { | ||
| return nil, fmt.Errorf("redis: invalid database number: %q", f[0]) | ||
| } | ||
| default: | ||
| return nil, fmt.Errorf("redis: invalid URL path: %s", u.Path) | ||
| } | ||
|
|
||
| return setupConnParams(u, o) | ||
| } | ||
|
|
||
| func getUserPassword(u *url.URL) (string, string) { | ||
| var user, password string | ||
| if u.User != nil { | ||
| user = u.User.Username() | ||
| if p, ok := u.User.Password(); ok { | ||
| password = p | ||
| } | ||
| } | ||
| return user, password | ||
| } | ||
|
|
||
| func getAddressesWithDefaults(u *url.URL) []string { | ||
| urlHosts := strings.Split(u.Host, ",") | ||
| var addresses []string | ||
| for _, urlHost := range urlHosts { | ||
| host, port, err := net.SplitHostPort(urlHost) | ||
| if err != nil { | ||
| host = u.Host | ||
| } | ||
| if host == "" { | ||
| host = "localhost" | ||
| } | ||
| if port == "" { | ||
| port = "6379" | ||
| } | ||
| addresses = append(addresses, net.JoinHostPort(host, port)) | ||
| } | ||
| return addresses | ||
| } | ||
|
|
||
| type queryOptions struct { | ||
| q url.Values | ||
| err error | ||
| } | ||
|
|
||
| func (o *queryOptions) has(name string) bool { | ||
| return len(o.q[name]) > 0 | ||
| } | ||
|
|
||
| func (o *queryOptions) string(name string) string { | ||
| vs := o.q[name] | ||
| if len(vs) == 0 { | ||
| return "" | ||
| } | ||
| delete(o.q, name) // enable detection of unknown parameters | ||
| return vs[len(vs)-1] | ||
| } | ||
|
|
||
| func (o *queryOptions) int(name string) int { | ||
| s := o.string(name) | ||
| if s == "" { | ||
| return 0 | ||
| } | ||
| i, err := strconv.Atoi(s) | ||
| if err == nil { | ||
| return i | ||
| } | ||
| if o.err == nil { | ||
| o.err = fmt.Errorf("redis: invalid %s number: %w", name, err) | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func (o *queryOptions) duration(name string) time.Duration { | ||
| s := o.string(name) | ||
| if s == "" { | ||
| return 0 | ||
| } | ||
| // try plain number first | ||
| if i, err := strconv.Atoi(s); err == nil { | ||
| if i <= 0 { | ||
| // disable timeouts | ||
| return -1 | ||
| } | ||
| return time.Duration(i) * time.Second | ||
| } | ||
| dur, err := time.ParseDuration(s) | ||
| if err == nil { | ||
| return dur | ||
| } | ||
| if o.err == nil { | ||
| o.err = fmt.Errorf("redis: invalid %s duration: %w", name, err) | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func (o *queryOptions) bool(name string) bool { | ||
| switch s := o.string(name); s { | ||
| case "true", "1": | ||
| return true | ||
| case "false", "0", "": | ||
| return false | ||
| default: | ||
| if o.err == nil { | ||
| o.err = fmt.Errorf("redis: invalid %s boolean: expected true/false/1/0 or an empty string, got %q", name, s) | ||
| } | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| func (o *queryOptions) remaining() []string { | ||
| if len(o.q) == 0 { | ||
| return nil | ||
| } | ||
| keys := make([]string, 0, len(o.q)) | ||
| for k := range o.q { | ||
| keys = append(keys, k) | ||
| } | ||
| sort.Strings(keys) | ||
| return keys | ||
| } | ||
|
|
||
| func setupConnParams(u *url.URL, o *redis.FailoverOptions) (*redis.FailoverOptions, error) { | ||
| q := queryOptions{q: u.Query()} | ||
|
|
||
| // compat: a future major release may use q.int("db") | ||
| if tmp := q.string("db"); tmp != "" { | ||
| db, err := strconv.Atoi(tmp) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("redis: invalid database number: %w", err) | ||
| } | ||
| o.DB = db | ||
| } | ||
|
|
||
| o.Protocol = q.int("protocol") | ||
| o.ClientName = q.string("client_name") | ||
| o.MaxRetries = q.int("max_retries") | ||
| o.MinRetryBackoff = q.duration("min_retry_backoff") | ||
| o.MaxRetryBackoff = q.duration("max_retry_backoff") | ||
| o.DialTimeout = q.duration("dial_timeout") | ||
| o.ReadTimeout = q.duration("read_timeout") | ||
| o.WriteTimeout = q.duration("write_timeout") | ||
| o.PoolFIFO = q.bool("pool_fifo") | ||
| o.PoolSize = q.int("pool_size") | ||
| o.PoolTimeout = q.duration("pool_timeout") | ||
| o.MinIdleConns = q.int("min_idle_conns") | ||
| o.MaxIdleConns = q.int("max_idle_conns") | ||
| o.MaxActiveConns = q.int("max_active_conns") | ||
| if q.has("conn_max_idle_time") { | ||
| o.ConnMaxIdleTime = q.duration("conn_max_idle_time") | ||
| } else { | ||
| o.ConnMaxIdleTime = q.duration("idle_timeout") | ||
| } | ||
| if q.has("conn_max_lifetime") { | ||
| o.ConnMaxLifetime = q.duration("conn_max_lifetime") | ||
| } else { | ||
| o.ConnMaxLifetime = q.duration("max_conn_age") | ||
| } | ||
| if q.err != nil { | ||
| return nil, q.err | ||
| } | ||
|
|
||
| // any parameters left? | ||
| if r := q.remaining(); len(r) > 0 { | ||
| return nil, fmt.Errorf("redis: unexpected option: %s", strings.Join(r, ", ")) | ||
| } | ||
|
|
||
| return o, nil | ||
| } |
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