我目前正在使用dropzone.js将图像上传到带有预签名网址的S3。一切正常,但我无法设置正在上传的文件的内容类型。默认情况下,它们都是使用binary/octet-stream
上传的,我无法直接在浏览器中查看它们。
我的S3预约政策如下:
const policy = s3PolicyV4.generate({
key: key,
bucket: process.env.S3_BUCKET,
contentType: 'multipart/form-data',
region: process.env.REGION,
accessKey: process.env.ACCESS_KEY_ID,
secretKey: process.env.SECRET_ACCESS_KEY,
});
我尝试在此处更改contentType
密钥,但没有运气,我也尝试在进行一些研究后添加此密钥。
conditions: [
["starts-with", "$Content-Type", ""]
]
这是前端代码,我将预先签名的URL的值添加到dropzone.js选项。
$.ajax({
type: "POST",
contentType: "application/json",
dataType: "json",
url: api_endpoint,
cache: false,
success: function(data) {
s3_filename_key = data.key;
$this.options.params = {
key: data.key,
acl: data.acl,
success_action_status: data.success_action_status,
"X-Amz-Credential": data['X-Amz-Credential'],
"X-Amz-Algorithm": data['X-Amz-Algorithm'],
"X-Amz-Date": data['X-Amz-Date'],
"Policy": data.Policy,
"X-Amz-Signature": data['X-Amz-Signature']
}
done();
},
error: function(data) {}
});
当我将Content-Type
添加到dropzone选项时,我会收到此结果 - Invalid according to Policy: Extra input fields: content-type
这是我的桶的CORS配置。
<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
<AllowedOrigin>*</AllowedOrigin>
<AllowedMethod>HEAD</AllowedMethod>
<AllowedMethod>PUT</AllowedMethod>
<AllowedMethod>POST</AllowedMethod>
<AllowedMethod>GET</AllowedMethod>
<ExposeHeader>ETag</ExposeHeader>
<ExposeHeader>Content-length</ExposeHeader>
<AllowedHeader>*</AllowedHeader>
<AllowedHeader>Content-*</AllowedHeader>
</CORSRule>
</CORSConfiguration>
答案 0 :(得分:0)
尝试添加正确的contentType,而是定义了enctype。 E.g:
const policy = s3PolicyV4.generate({
key: key,
bucket: process.env.S3_BUCKET,
contentType: 'application/json',
region: process.env.REGION,
accessKey: process.env.ACCESS_KEY_ID,
secretKey: process.env.SECRET_ACCESS_KEY,
});
Multypart / form-data是表单的enctype属性。