如何使用预签名的URL访问s3存储桶中的图像 [英] How access image in s3 bucket using pre-signed url
问题描述
我想使用预签名的URL访问存储在s3存储桶中的图像.该图像需要访问具有预签名的URL的用户.请帮助我解决此问题.
I want access an image stored in s3 bucket using pre-signed url.This image needs to access who has the pre-signed url.Please help me to solve this issue.
我不知道它获得了什么签名.如果它获得了我的签名,那么它对其他用户的工作方式.请帮助我
I have no idea what signature is it getting.If it's getting my signature, then how it's works for other users.Please help me
当我这样做时,它将显示此错误
When I doing this.It will show this error
<Error>
<Code>SignatureDoesNotMatch</Code>
</Message>
<AWSAccessKeyId>XX</AWSAccessKeyId>
<StringToSign>GET 1900675866 /bucketname/161305.jpg</StringToSign>
<SignatureProvided>xxxx</SignatureProvided>
<StringToSignBytes>
47 45 54 0a 0a 0a 31 39 30 30 36 37 35 38 36 36 0a 2f 6b 6c 70 2d 6d 65 64 69 61 2f 31 36 31 33 30 35 2e 6a 70 67
</StringToSignBytes>
<RequestId>xxxxx</RequestId>
<HostId>
xxxx
</HostId>
</Error>
这是我尝试生成presigned-url的代码
Here is the code I tried to generate presigned-url
exports.handler = async function (event, context) {
console.log('strarting to generate pre-signed image url');
let s3BucketName = process.env.S3_BUCKET_NAME;
const request = JSON.parse(event.body);
const objectKey = request.key;
const studentId = request.studentId;
console.log(' generate pre-signed image url for:' + objectKey);
console.log('Started getting pre signed url for:' + objectKey);
let params = {
Bucket: s3BucketName,
Key: objectKey,
Expires: 60 * 60 * 24 * 365 * 10,
ContentType: 'image/jpg'
};
return await s3.getSignedUrlPromise('putObject', params).then(async url => {
console.log('Successfully generated pre signed image url', url);
const payload = {
message: 'success',
imageUrl: url
};
const response = {
statusCode: 201,
headers: responseHeaders,
body: JSON.stringify(payload),
};
return response;
}).catch(error => {
console.error(`Failed to generate presigned url: ${error}`);
return {
statusCode: error.statusCode || 501,
headers: responseHeaders,
body: JSON.stringify({
message: `Failed to generate presigned url. Request Id: ${context.awsRequestId}`
})
};
});
}
在aws方面,我阻止了所有公共访问. 这是存储桶政策
In aws side, I blocked all public access. Here is the bucket policy
{
"Version": "2008-10-17",
"Statement": [
{
"Sid": "AllowPublicRead",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::media/*"
}
]
}
推荐答案
您正在尝试为PutObject生成一个预签名的url.尝试使用"GetObject"
You are trying to generate a presigned url for PutObject. Try "GetObject" instead
这篇关于如何使用预签名的URL访问s3存储桶中的图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!