小编NJo*_*nes的帖子

我在 API 网关后面有一个 Lambda Nodejs 函数，它成功返回预签名 URL：

const AWS = require('aws-sdk');
const S3 = new AWS.S3({
  apiVersion: '2006-03-01',
  signatureVersion: 'v4'
});

function getSignedUrl(id, type) {
  const key = `uploads/${id}.${type}`;
  return S3.getSignedUrl('putObject', {
    Bucket: 'example-bucket-name',
    Key: key,
    Expires: 300
  });
}

预签名 URL 可能如下所示：

https://example-bucket-name.s3.eu-central-1.amazonaws.com/uploads/489eb7115d0c479eaf9c3b6a01eb1893.png?Content-Type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential= ASIARTVN4TPKUACY5POZ%2F20200616%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20200616T104031Z&X-Amz-Expires=300&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEEMaDGV1LWNlbnRyYWwt MSJHMEUCIQCDd%2B5hFjcBd%2FA6TEV7Se6L%2B6V8VtgCrMg0%2FbOkoGKy1wIgL20u20i%2B80rnBf49MfU1T3MQK2RQdoyQF6SwGQiYgeMq7gEIvP%2F%2F%2F% 2F%2F%2F%2F%2F%2F%2FARABGgwxMTA5NjAwOTAwNjkiDIcy2z8%2FpQIhMOOaZirCAUFhV6uGF%2Ff44lDl%2BaFxIt9D302gcuPaxlrgZWlRMHb%2FEdrKFJsWP%2FG7%2B6ovilKh9WmcBX1 fzuVa%2BHQ6rv6OaCueMENDOBEj%2FvJ1hrI%2FwMDF1RLVlqq7pTDp6h6hmUxPfbqXu1k8sjcFotVzXZTzR0dX6kmWl41uEvaglXjrGG3ApvviH%2BSFLdUdvK9PBgrgSlamGIhxdJN75xxBzQMEL fdpPJ6QanhLEwIa%2FuMliHPliXC2fasMzFEheA3Xmik43McnMJ3DovcFOuABdae1G7uUXOSaQzGZ7IjPLLZnMFfow4SzosQHlMUurlqQATPbieC9W3McsMVwggwzZX6BcN9OJb%2B0Ag3x9pS5eLnLsEio%2FyAP ZJfXzoGBH5AdZ6TAZtC5cgKy0TEebH%2F3bF4%2FiamoTQ6YcZ4f48NefoNFHcRPXl3VF%2FdINmuTSG1cNlh2svT9jAUfOgaeK7tnFAW79L38Nv7xnnFMYFpyxoUx8XVkffCXmq15dyG7rLIR0FHkJ 7p4C8eEqbQzOj%2Fsj1ELFFAWPtq38ZgFnWF%2BYf6W4UrkHD9AGdUucD1qvAA% 3D&X-Amz-签名=e11f346296a979e586b8f81a9db2ef2ce58c9f7a13a4f3c31f9a0bb9997b8b81&X-Amz-SignedHeaders=主机

然而，当在浏览器中测试所述 URL 时，我得到一个 SignatureDoesNotMatch。我认为这似乎很公平，因为我只想稍后将其与应用程序中的 PUT 一起使用。

然而，使用curl或postman我得到403 Forbidden：

curl -v -X PUT -T 489eb7115d0c479eaf9c3b6a01eb1893.png "https://example-bucket-name.s3.eu-central-1.amazonaws.com/uploads/489eb7115d0c479eaf9c3b6a01eb1893.png?Content-Type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIARTVN4TPKUACY5POZ%2F20200616%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20200616T104031Z&X-Amz-Expires=300&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEEMaDGV1LWNlbnRyYWwtMSJHMEUCIQCDd%2B5hFjcBd%2FA6TEV7Se6L%2B6V8VtgCrMg0%2FbOkoGKy1wIgL20u20i%2B80rnBf49MfU1T3MQK2RQdoyQF6SwGQiYgeMq7gEIvP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARABGgwxMTA5NjAwOTAwNjkiDIcy2z8%2FpQIhMOOaZirCAUFhV6uGF%2Ff44lDl%2BaFxIt9D302gcuPaxlrgZWlRMHb%2FEdrKFJsWP%2FG7%2B6ovilKh9WmcBX1fzuVa%2BHQ6rv6OaCueMEnDOBEj%2FvJ1hrI%2FwMDF1RLVlqq7pTDp6h6hmUxPfbqXu1k8sjcFotVzXZTzR0dX6kmWl41uEvaglXjrGG3ApvviH%2BSFLdUdvK9PBgrgSlamGIhxdJN75xxBzQMELfdpPJ6QanhLEwIa%2FuMliHPliXC2fasMzFEheA3Xmik43McnMJ3DovcFOuABdae1G7uUXOSaQzGZ7IjPLLZnMFfow4SzosQHlMUurlqQATPbieC9W3McsMVwggwzZX6BcN9OJb%2B0Ag3x9pS5eLnLsEio%2FyAPZJfXzoGBH5AdZ6TAZtC5cgKy0TEebH%2F3bF4%2FiamoTQ6YcZ4f48NefoNFHcRPXl3VF%2FdINmuTSG1cNlh2svT9jAUfOgaeK7tnFAW79L38Nv7xnnFMYFpyxoUx8XVkffCXmq15dyG7rLIR0FHkJ7p4C8eEqbQzOj%2Fsj1ELFFAWPtq38ZgFnWF%2BYf6W4UrkHD9AGdUucD1qvAA%3D&X-Amz-Signature=e11f346296a979e586b8f81a9db2ef2ce58c9f7a13a4f3c31f9a0bb9997b8b81&X-Amz-SignedHeaders=host"

Lambda 函数具有以下权限：

s3:ListBucket          Allow: arn:aws:s3:::example-bucket-name
s3:GetBucketLocation   Allow: arn:aws:s3:::example-bucket-name
s3:PutObject           Allow: arn:aws:s3:::example-bucket-name/uploads/*

S3 Bucket …