Question

我试图根据这篇文章将文件上传到S3： https://aws.amazon.com/articles/1434

但是，我收到以下错误：＆＃34;我们计算的请求签名与您提供的签名不匹配。检查您的密钥和签名方法。＆＃34;

显然我没有正确计算签名，但我无法理解错误的位置。

我使用C＃后端进行签名计算：

这是我的后端代码：

 string policyStr = @"{""expiration"":""2014-05-01T12:00:00.000Z"",""conditions"":   [{""bucket"":""my-bucket""},[""starts-with"",""$key"",""uploads/${filename}""],{""acl"":""private""},{""success_action_redirect"":""http://localhost/""},[""starts-with"",""$Content-Type"",""text/plain""],[""content-length-range"",0,1048576]]}";

        string secretKey = "secret";
        string bucketName = "my-bucket";
        string filePath = string.Format(@"courseFiles\{0}", model.Name);

        var hash = new HMACSHA1(Encoding.UTF8.GetBytes(secretKey));
        var data = hash.ComputeHash(Encoding.UTF8.GetBytes(policyStr));

        var signature = Convert.ToBase64String(data);

        return new UploadFileResponseViewModel
        {
            AWSAccessKey = "accessKey",
            BucketName = bucketName,
            FilePath = filePath,
            Policy = Convert.ToBase64String(Encoding.UTF8.GetBytes(policyStr)),
            Signature = signature,
            Action = "https://my-bucket.s3.amazonaws.com/"
        };

客户端看起来与我提到的文章中解释的几乎相同。有谁知道我做错了什么？

Answer 1

最后我找到了解决方案。

这是计算签名的正确方法，以防万一有需要。

        string policyStr = @"{""expiration"":""2014-05-01T12:00:00.000Zr"",""conditions"":[{""bucket"":""my-bucket""},[""starts-with"",""$key"",""uploads""],{""acl"":""private""},{""success_action_redirect"":""http://localhost""},[""starts-with"",""$Content-Type"",""text/plain""],[""content-length-range"",0,1048576]]}";

        string secretKey = "secret";
        string bucketName = "my-bucket";
        string filePath = string.Format(@"courseFiles\{0}", model.Name);

        var hash = new HMACSHA1(Encoding.UTF8.GetBytes(secretKey));

        var policy = Convert.ToBase64String(Encoding.UTF8.GetBytes(policyStr));

        var data = hash.ComputeHash(Encoding.UTF8.GetBytes(policy));

        var signature = Convert.ToBase64String(data);

        return new UploadFileResponseViewModel
        {
            AWSAccessKey = "access",
            BucketName = bucketName,
            FilePath = filePath,
            Policy = policy,
            Signature = signature,
            Action = "https://my-bucket.s3.amazonaws.com/"
        };

无法使用javascript将文件上传到S3

1 个答案: