字段中格式错误的 Unicode 代码序列

Question

我正在尝试使用 POST 表单将浏览器上传到我的 s3 存储桶。我正在使用eddturtle/direct-upload生成策略和签名。这是我的代码：

$upload = new Signature(
            self::S3_KEY,
            self::S3_SECRET,
            self::S3_BUCKET,
            self::S3_REGION
        );

并使用方法生成html $upload->getFormInputsAsHtml()。生成这样的html

<form action="//s3.amazonaws.com/bucket" method="POST" enctype="multipart/form-data" class="upload-form">
    <input type="hidden" name="Content-Type" value="">
    <input type="hidden" name="acl" value="public-read">
    <input type="hidden" name="success_action_status" value="201">
    <input type="hidden" name="policy" value="eyJleHBpcmF0aW9uIjoiMjAxNy0wMi0xNVQxMzowNDozOFoiLCJjb25kaXRpb25zIjpbeyJidWNrZXQiOiJ0YWdmaSJ9LHsiYWNsIjoicHJpdmF0ZSJ9LFsic3RhcnRzLXdpdGgiLCIka2V5IiwiIl0sWyJzdGFydHMtd2l0aCIsIiRDb250ZW50LVR5cGUiLCIiXSxbImNvbnRlbnQtbGVuZ3RoLXJhbmdlIiwwLDUyNDI4ODAwMF0seyJzdWNjNzX2FjdGlvbl9zdGF0dXMiOiIyMDEifSx7IngtYW16LWNyZWRlbnRpYWwiOiJBS0lBSkhGS0hKMklLNjZTVFA0QVwvMjAxNzAyMTVcL3VzLWVhc3QtMVwvczNcL2F3czRfcmVxdWVzdCJ9LHsieC1hbXotYWxnb3JpdGhtIjoiQVdTNC1ITUFDLVNIQTI1NiJ9LHsieC1hbXotZGF0ZSI6IjIwMTcwMjE1VDA3MDQzOFoifV19">
    <input type="hidden" name="X-amz-credential" value="AKIAJHFKHJ2IK66STP4A/20170215/us-east-1/s3/aws4_request">
    <input type="hidden" name="X-amz-algorithm" value="AWS4-HMAC-SHA256">
    <input type="hidden" name="X-amz-date" value="20170215T070438Z">
    <input type="hidden" name="X-amz-signature" value="e9d30613e4fcab8fec3fe75c4ce2969bb6497d83af7cca7f9ea6a1c0738844c5">
    <input type="hidden" name="key" value="${filename}">
</form>

但提交表单后，我从 s3 收到此错误

<Error>
    <Code>InvalidArgument</Code>
    <Message>Malformed Unicode code sequence in the field.</Message>
    <ArgumentName>formField</ArgumentName>
    <RequestId>46E52494FC98ED76</RequestId>
    <HostId>
        Qk/g94sJSfVicIxPb3oFN0nO1EVCvxy8YzBQjRKyKpATZZmX1VjlDK+zWfvidhZl5vuemZyuKg0=
    </HostId>
</Error>

示例请求负载

------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“图像”；filename="shop-small.png" 内容类型：image/png

------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“内容类型”

------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“acl”

私人 ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“成功_操作_状态”

201 ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容配置：表单数据；名称=“政策”

eyJleHBpcmF0aW9uIjoiMjAxNy0wMi0xNVQxOToxMzo1NVoiLCJjb25kaXRpb25zIjpbeyJidWNrZXQiOiJ0YWdmaSJ9LHsiYWNsIjoicHJpdmF0ZSJ9LFsic3RhcnRzLXdpdGgiLCIka2V5IiwiIl0 swyjzdGFydHMtd2l0aCIsIiRDb250ZW50LVR5cGUILCIiXSxbImNvbnRlbnQtbGVuZ3RoLXJhbmdliiwwLDUyNDI4ODAwMF0seyJzdWNjZXNzX2FjdGlvbl9zdGF0dXMiOiIyMDEifSx7IngtYW16L WNyZWRlbnRpYWwiOiJBS0lBSkhGS0hKMklLNjZTVFA0QVwvMjAxNzAyMTVcL3VzLWVhc3QtMVwvczNcL2F3czRfcmVxdWVzdCJ9LHsieC1hbXotYWxnb3JpdGhtIjoiQVdTNC1ITUFDLVNIQTI1NiJ 9LHsieC1hbXotZGF0ZSI6IjIwMTcwMjE1VDEzMTM1NVoifV19 ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“X-amz-凭据”

AKIAJHFKHJ2IK66STP4A/20170215/us-east-1/s3/aws4_request ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“X-amz-算法”

AWS4-HMAC-SHA256 ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“X-amz-日期”

20170215T131355Z ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“X-amz-签名”

1c28fb88fc0b1317df11b7f566fe39eaac9b8cba012b8fef80448e93767f2677 ------WebKitFormBoundaryVGEGWkAW5d70u2rp 内容处置：表单数据；名称=“键”

测试文件------WebKitFormBoundaryVGEGWkAW5d70u2rp--

我不知道问题是什么以及如何解决。我经历过的每个例子都使用类似的过程。提前致谢。

Answer 1

我终于把它修好了。虽然我仍然不知道是什么导致了这个问题。我不是用来$upload->getFormInputsAsHtml(); 获取表单内容，而是用来$s3Policy = $upload->getFormInputs();获取策略并单独分配给预先编写的 html。

<form :action="aws_url" method="POST" enctype="multipart/form-data">

    <input type="hidden" name="Content-Type" :value="s3Policy.content_type" />
    <input type="hidden" name="acl" :value="s3Policy.acl" />
    <input type="hidden" name="success_action_status" :value="s3Policy.success_action_status" />
    <input type="hidden" name="policy" :value="s3Policy.policy" />
    <input type="hidden" name="X-amz-credential" :value="s3Policy.credential" />
    <input type="hidden" name="X-amz-algorithm" :value="s3Policy.algorithm" />
    <input type="hidden" name="X-amz-date" :value="s3Policy.date" />
    <input type="hidden" name="X-amz-signature" :value="s3Policy.signature" />
    <input type="hidden" name="key" :value="s3Policy.key" />
    <input type="file" name="file">
    <input type="submit" value="Upload">

</form>

可能这是由vuejs我的前端引起的，但 html 在开发控制台中看起来很好。