FineUploader – JSON 响应出错 – “响应不包括 base64 编码策略！”

FineUploader - Error with JSON Response - "Response does not include the base64 encoded policy!"

我正在尝试在 asp.NET MVC5 应用程序中使用 FineUploader。当我尝试使用 FineUploader 上传文件时，在我的控制器中，我对策略文档进行 Base64 编码，对 base 64 编码文档进行签名，然后根据文档将结果作为 JSON 对象返回。但是，控制器返回 JSON 后，我在页面上收到以下错误：

"响应不包含 base64 编码策略！"

我的 JSON 负载的格式一定有问题。这里是代码的相对部分：

byte[] byteArrayPolicy = System.Text.Encoding.UTF8.GetBytes(jsonStringFull);

    string base64Policy = Convert.ToBase64String(byteArrayPolicy);



    var signature = kha.ComputeHash(Encoding.UTF8.GetBytes(base64Policy));

    var signatureString = ToHexString(signature, true);



    string payloadString = @"{""policy"":""" + base64Policy + @"""," + @"""signature"":""" + signatureString + @"""}";



    JsonResult jsonRequest = Json(payloadString);



    return jsonRequest;"{ "policy":"eyJleH...=","signature":"da186a017b038382e2cc21dfa4f1fbf806c51adf92984a9b95f1aa845aeb72e4"}""{ "policy":"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","signature":"c592b3bca0dedba10301e06df37760cb527ac0a83112ae9b668dce00f0b23465"}""{...}"{...}

我返回的 JSON 对象的格式有什么问题吗？该政策是我从 FineUploader 收到的政策的精确副本，只是它已经过 Base64 编码。签名是一个十六进制字符串。以下是有效负载的示例：

byte[] byteArrayPolicy = System.Text.Encoding.UTF8.GetBytes(jsonStringFull);

    string base64Policy = Convert.ToBase64String(byteArrayPolicy);



    var signature = kha.ComputeHash(Encoding.UTF8.GetBytes(base64Policy));

    var signatureString = ToHexString(signature, true);



    string payloadString = @"{""policy"":""" + base64Policy + @"""," + @"""signature"":""" + signatureString + @"""}";



    JsonResult jsonRequest = Json(payloadString);



    return jsonRequest;"{ "policy":"eyJleH...=","signature":"da186a017b038382e2cc21dfa4f1fbf806c51adf92984a9b95f1aa845aeb72e4"}""{ "policy":"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","signature":"c592b3bca0dedba10301e06df37760cb527ac0a83112ae9b668dce00f0b23465"}""{...}"{...}

请注意，Base64 策略中的 "..." 是为了简洁。

我收到的错误是响应不包含 Base64 编码策略，但在我看来它确实包含 Base64 编码策略。我的签名可能不正确吗？在我将签名计算为字节数组后，是否不应该将其转换为十六进制字符串？

这是实际的paypload，根据Chrome：

byte[] byteArrayPolicy = System.Text.Encoding.UTF8.GetBytes(jsonStringFull);

    string base64Policy = Convert.ToBase64String(byteArrayPolicy);



    var signature = kha.ComputeHash(Encoding.UTF8.GetBytes(base64Policy));

    var signatureString = ToHexString(signature, true);



    string payloadString = @"{""policy"":""" + base64Policy + @"""," + @"""signature"":""" + signatureString + @"""}";



    JsonResult jsonRequest = Json(payloadString);



    return jsonRequest;"{ "policy":"eyJleH...=","signature":"da186a017b038382e2cc21dfa4f1fbf806c51adf92984a9b95f1aa845aeb72e4"}""{ "policy":"eyJleHBpcmF0aW9uIjoiMjAxNi0wNC0xNFQxNDo0MzozMS4zOTZaIiwiY29uZGl0aW9ucyI6W3siYWNsIjoicHJpdmF0ZSJ9LHsiYnVja2V0IjoiZnVuZHRoZWZ1bmVyYWwifSx7IkNvbnRlbnQtVHlwZSI6ImltYWdlL2pwZWcifSx7InN1Y2Nlc3NfYWN0aW9uX3N0YXR1cyI6IjIwMCJ9LHsieC1hbXotYWxnb3JpdGhtIjoiQVdTNC1ITUFDLVNIQTI1NiJ9LHsia2V5IjoiNGZkOGIzMDMtMmQ3Zi00MWJlLThiYWItYzUyMjBiNmRlMjQ1LmpwZyJ9LHsieC1hbXotY3JlZGVudGlhbCI6IkFLSUFKUkhDU09STExFUkpVMkVBLzIwMTYwNDE0L3VzLWVhc3QtMS9zMy9hd3M0X3JlcXVlc3QifSx7IngtYW16LWRhdGUiOiIyMDE2MDQxNFQxNDM4MzFaIn0seyJ4LWFtei1tZXRhLXFxZmlsZW5hbWUiOiIyMDE2LTAzLTI0LmpwZyJ9XX0=","signature":"c592b3bca0dedba10301e06df37760cb527ac0a83112ae9b668dce00f0b23465"}""{...}"{...}

错误确实出现在您的代码中。正如您在答案中说明的那样，响应有效负载是：

byte[] byteArrayPolicy = System.Text.Encoding.UTF8.GetBytes(jsonStringFull);

    string base64Policy = Convert.ToBase64String(byteArrayPolicy);



    var signature = kha.ComputeHash(Encoding.UTF8.GetBytes(base64Policy));

    var signatureString = ToHexString(signature, true);



    string payloadString = @"{""policy"":""" + base64Policy + @"""," + @"""signature"":""" + signatureString + @"""}";



    JsonResult jsonRequest = Json(payloadString);



    return jsonRequest;"{ "policy":"eyJleH...=","signature":"da186a017b038382e2cc21dfa4f1fbf806c51adf92984a9b95f1aa845aeb72e4"}""{ "policy":"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","signature":"c592b3bca0dedba10301e06df37760cb527ac0a83112ae9b668dce00f0b23465"}""{...}"{...}

但应该是这样的：

byte[] byteArrayPolicy = System.Text.Encoding.UTF8.GetBytes(jsonStringFull);

    string base64Policy = Convert.ToBase64String(byteArrayPolicy);



    var signature = kha.ComputeHash(Encoding.UTF8.GetBytes(base64Policy));

    var signatureString = ToHexString(signature, true);



    string payloadString = @"{""policy"":""" + base64Policy + @"""," + @"""signature"":""" + signatureString + @"""}";



    JsonResult jsonRequest = Json(payloadString);



    return jsonRequest;"{ "policy":"eyJleH...=","signature":"da186a017b038382e2cc21dfa4f1fbf806c51adf92984a9b95f1aa845aeb72e4"}""{ "policy":"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","signature":"c592b3bca0dedba10301e06df37760cb527ac0a83112ae9b668dce00f0b23465"}""{...}"{...}

通过 JSON.parse 运行响应后，结果是单个字符串而不是对象。