为什么我会得到"Unhandled exception: Not a string or buffer Type"？

Question

错误源自下面这一行，因为我正确地遵循了示例(https://www.npmjs.org/package/aws-sign)，所以它没有意义。如有任何提示，不胜感激。

var signer = new AwsSign({
        accessKeyId: 'AKIAIO7EXAMPLE',
        secretAccessKey: 'bPxRfiCYEXAMPLEKEY',
});

误差

 Caught unhandled exception:  Not a string or buffer TypeError: Not a string or buffer
    at exports.createHmac (crypto.js:138:21)
    at hmacSha1 (/rhel5pdi/workplace/jamiey/jamiey-awsProject/src/awsProject/node_modules/aws-sign/index.js:62:17)
    at sign (/rhel5pdi/workplace/jamiey/jamiey-awsProject/src/awsProject/node_modules/aws-sign/index.js:77:10)
    at new authorization (/rhel5pdi/workplace/jamiey/jamiey-awsProject/src/awsProject/node_modules/aws-sign/index.js:47:39)

Answer 1

此错误与字符串缓冲区无关。这是由于没有正确安装模块造成的。再次检查以确保模块已安装。