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client: permute endpoints manually (for Go 1.9>)

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To keep backward compatibility, use old algorithm of
rand.Rand.Perm.

Reference: caae0917bf (diff-d4a72c5ba8515eae95a093e0aec62635).

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyu-Ho Lee 2017-09-22 10:14:31 +09:00
parent 527429f30a
commit fbc7acde95
1 changed files with 9 additions and 2 deletions
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11
client/client.go
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@ -670,8 +670,15 @@ func (r *redirectedHTTPAction) HTTPRequest(ep url.URL) *http.Request {
}
func shuffleEndpoints(r *rand.Rand, eps []url.URL) []url.URL {
p := r.Perm(len(eps))
neps := make([]url.URL, len(eps))
// copied from Go 1.9<= rand.Rand.Perm
n := len(eps)
p := make([]int, n)
for i := 0; i < n; i++ {
j := r.Intn(i + 1)
p[i] = p[j]
p[j] = i
}
neps := make([]url.URL, n)
for i, k := range p {
neps[i] = eps[k]
}