117 lines
2.8 KiB
Go
117 lines
2.8 KiB
Go
package zk
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"math/rand"
|
|
"strconv"
|
|
"strings"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// AuthACL produces an ACL list containing a single ACL which uses the
|
|
// provided permissions, with the scheme "auth", and ID "", which is used
|
|
// by ZooKeeper to represent any authenticated user.
|
|
func AuthACL(perms int32) []ACL {
|
|
return []ACL{{perms, "auth", ""}}
|
|
}
|
|
|
|
// WorldACL produces an ACL list containing a single ACL which uses the
|
|
// provided permissions, with the scheme "world", and ID "anyone", which
|
|
// is used by ZooKeeper to represent any user at all.
|
|
func WorldACL(perms int32) []ACL {
|
|
return []ACL{{perms, "world", "anyone"}}
|
|
}
|
|
|
|
func DigestACL(perms int32, user, password string) []ACL {
|
|
userPass := []byte(fmt.Sprintf("%s:%s", user, password))
|
|
h := sha1.New()
|
|
if n, err := h.Write(userPass); err != nil || n != len(userPass) {
|
|
panic("SHA1 failed")
|
|
}
|
|
digest := base64.StdEncoding.EncodeToString(h.Sum(nil))
|
|
return []ACL{{perms, "digest", fmt.Sprintf("%s:%s", user, digest)}}
|
|
}
|
|
|
|
// FormatServers takes a slice of addresses, and makes sure they are in a format
|
|
// that resembles <addr>:<port>. If the server has no port provided, the
|
|
// DefaultPort constant is added to the end.
|
|
func FormatServers(servers []string) []string {
|
|
for i := range servers {
|
|
if !strings.Contains(servers[i], ":") {
|
|
servers[i] = servers[i] + ":" + strconv.Itoa(DefaultPort)
|
|
}
|
|
}
|
|
return servers
|
|
}
|
|
|
|
// stringShuffle performs a Fisher-Yates shuffle on a slice of strings
|
|
func stringShuffle(s []string) {
|
|
for i := len(s) - 1; i > 0; i-- {
|
|
j := rand.Intn(i + 1)
|
|
s[i], s[j] = s[j], s[i]
|
|
}
|
|
}
|
|
|
|
// validatePath will make sure a path is valid before sending the request
|
|
func validatePath(path string, isSequential bool) error {
|
|
if path == "" {
|
|
return ErrInvalidPath
|
|
}
|
|
|
|
if path[0] != '/' {
|
|
return ErrInvalidPath
|
|
}
|
|
|
|
n := len(path)
|
|
if n == 1 {
|
|
// path is just the root
|
|
return nil
|
|
}
|
|
|
|
if !isSequential && path[n-1] == '/' {
|
|
return ErrInvalidPath
|
|
}
|
|
|
|
// Start at rune 1 since we already know that the first character is
|
|
// a '/'.
|
|
for i, w := 1, 0; i < n; i += w {
|
|
r, width := utf8.DecodeRuneInString(path[i:])
|
|
switch {
|
|
case r == '\u0000':
|
|
return ErrInvalidPath
|
|
case r == '/':
|
|
last, _ := utf8.DecodeLastRuneInString(path[:i])
|
|
if last == '/' {
|
|
return ErrInvalidPath
|
|
}
|
|
case r == '.':
|
|
last, lastWidth := utf8.DecodeLastRuneInString(path[:i])
|
|
|
|
// Check for double dot
|
|
if last == '.' {
|
|
last, _ = utf8.DecodeLastRuneInString(path[:i-lastWidth])
|
|
}
|
|
|
|
if last == '/' {
|
|
if i+1 == n {
|
|
return ErrInvalidPath
|
|
}
|
|
|
|
next, _ := utf8.DecodeRuneInString(path[i+w:])
|
|
if next == '/' {
|
|
return ErrInvalidPath
|
|
}
|
|
}
|
|
case r >= '\u0000' && r <= '\u001f',
|
|
r >= '\u007f' && r <= '\u009f',
|
|
r >= '\uf000' && r <= '\uf8ff',
|
|
r >= '\ufff0' && r < '\uffff':
|
|
return ErrInvalidPath
|
|
}
|
|
w = width
|
|
}
|
|
return nil
|
|
}
|