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tools.go
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tools.go
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package oauth
import (
"bytes"
"encoding/base64"
"fmt"
"math/rand"
"net/url"
"sort"
"strings"
"time"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
func randString() string {
b := make([]byte, 32)
rand.Read(b)
return base64.StdEncoding.EncodeToString(b)
}
func randString2(len int) string {
bytes := make([]byte, len)
for i := 0; i < len; i++ {
b := rand.Intn(26) + 65
bytes[i] = byte(b)
}
return string(bytes)
}
func escape(s string) string {
t := make([]byte, 0, 3*len(s))
for i := 0; i < len(s); i++ {
c := s[i]
if isEscapable(c) {
t = append(t, '%')
t = append(t, "0123456789ABCDEF"[c>>4])
t = append(t, "0123456789ABCDEF"[c&15])
} else {
t = append(t, s[i])
}
}
return string(t)
}
func isEscapable(b byte) bool {
return !('A' <= b && b <= 'Z' || 'a' <= b && b <= 'z' || '0' <= b && b <= '9' || b == '-' || b == '.' || b == '_' || b == '~')
}
func canonicalizeURL(u *url.URL) string {
var buf bytes.Buffer
buf.WriteString(u.Scheme)
buf.WriteString("://")
buf.WriteString(u.Host)
buf.WriteString(u.Path)
return buf.String()
}
func sortValue(params url.Values, format string) string {
keys := make([]string, 0, len(params))
for k := range params {
keys = append(keys, k)
}
sort.Strings(keys)
paramsList := make([]string, 0, len(params))
for _, key := range keys {
// `%s="%s"` or "%s=%s"
paramsList = append(paramsList, fmt.Sprintf(format, escape(key), escape(params.Get(key))))
}
return strings.Join(paramsList, "&")
}