github.com/fastwego/offiaccount@v1.0.1/util/randstring.go (about)

     1  // Copyright 2020 FastWeGo
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package util
    16  
    17  import (
    18  	"math/rand"
    19  	"time"
    20  )
    21  
    22  const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
    23  
    24  // GetRandStringWithCharset 获取指定字符集 下 指定长度的随机字符串
    25  func GetRandStringWithCharset(length int, charset string) string {
    26  	seededRand := rand.New(rand.NewSource(time.Now().UnixNano()))
    27  
    28  	b := make([]byte, length)
    29  	for i := range b {
    30  		b[i] = charset[seededRand.Intn(len(charset))]
    31  	}
    32  	return string(b)
    33  }
    34  
    35  // GetRandString 获取指定长度的随机字符串
    36  func GetRandString(length int) string {
    37  	return GetRandStringWithCharset(length, charset)
    38  }