go.charczuk.com@v0.0.0-20240327042549-bc490516bd1a/projects/blogctl/pkg/engine/etag.go (about)

     1  /*
     2  
     3  Copyright (c) 2023 - Present. Will Charczuk. All rights reserved.
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file at the root of the repository.
     5  
     6  */
     7  
     8  package engine
     9  
    10  import (
    11  	"crypto/md5"
    12  	"encoding/hex"
    13  )
    14  
    15  // ETag creates an etag for a given blob.
    16  func ETag(contents []byte) (string, error) {
    17  	hash := md5.New()
    18  	_, err := hash.Write(contents)
    19  	if err != nil {
    20  		return "", err
    21  	}
    22  	return hex.EncodeToString(hash.Sum(nil)), nil
    23  }