github.com/blend/go-sdk@v1.20220411.3/fileutil/etag.go (about)

     1  /*
     2  
     3  Copyright (c) 2022 - Present. Blend Labs, Inc. All rights reserved
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file.
     5  
     6  */
     7  
     8  package fileutil
     9  
    10  import (
    11  	"crypto/md5"
    12  	"encoding/hex"
    13  
    14  	"github.com/blend/go-sdk/ex"
    15  )
    16  
    17  // ETag creates an etag for a given blob.
    18  func ETag(contents []byte) (string, error) {
    19  	hash := md5.New()
    20  	_, err := hash.Write(contents)
    21  	if err != nil {
    22  		return "", ex.New(err)
    23  	}
    24  	return hex.EncodeToString(hash.Sum(nil)), nil
    25  }