七牛的fetch一直返回401 Unauthorized，请帮忙看看access_token写错了吗？

Question

代码如下，请帮忙看看哪里错了吗？

def qiniu_access_token(path)
    signing_str = path + "\n"
    sign = HMAC::SHA1.digest(signing_str, Figaro.env.qiniu_secret_key)
    encoded_sign = Qiniu::Utils.urlsafe_base64_encode(sign)
    "#{Figaro.env.qiniu_access_key}:#{encoded_sign}"
  end

def qiniu_fetch(from, bucket, key)
    to = "#{bucket}:#{key}"
    encode_from = Qiniu::Utils.urlsafe_base64_encode(from)
    encode_to = Qiniu::Utils.urlsafe_base64_encode(to)
    path = "http://iovip.qbox.me/fetch/#{encode_from}/to/#{encode_to}"

    uri = URI(path)
    req = Net::HTTP::Post.new(uri)
    req['Authorization'] = "QBox #{qiniu_access_token(path)}"
    res = Net::HTTP.start(uri.host, uri.port) do |http|
      http.request(req)
    end

    case res
    when Net::HTTPSuccess
      puts 'upload ok'
    else
      puts res
    end
  end

冒昧地请 @高唱大江东去 帮忙看看

---

问题解决了，更新后的代码如下

def qiniu_fetch(from, bucket, key)
    encode_from = Qiniu::Utils.urlsafe_base64_encode(from)
    encode_to = Qiniu::Utils.encode_entry_uri(bucket, key)

    path = "http://iovip.qbox.me/fetch/#{encode_from}/to/#{encode_to}"
    access_token = Qiniu::Auth.generate_acctoken(path)

    uri = URI(path)
    req = Net::HTTP::Post.new(uri)
    req['Authorization'] = "QBox #{access_token}"
    res = Net::HTTP.start(uri.host, uri.port) do |http|
      http.request(req)
    end

    case res
    when Net::HTTPSuccess
      puts 'upload ok'
    else
      puts res
    end
  end

PS: 通过微信js-sdk上传的图片可以通过调用七牛的fetch接口直接保存到七牛云存储，这点很方便。

微信的下载文件媒体接口：http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=AccessTok...，把from设成这个url就可以了

Answer 1

很可能是path部分的处理造成的签名失败，可以看一下七牛ruby生成accesstoken的方法：

https://github.com/qiniu/ruby-sdk/blob/master/lib/qiniu/auth.rb#L209