我一直在尝试用普通javascript生成用于上传对象的预签名url，但我经常遇到SignatureDon'tMatch错误。 如果有人能帮我，那将是很大的帮助。
const myBucket = "my-bucket-name";
const accessKey = "myaccesskey";
const secretAccessKey = "mysecretkey";
const regionName = "us-east-1";
const myKey = "codeTest.jpg";
const serviceName = "s3upload";
const signedUrlExpireSeconds = 60 * 5; // In 5 minutes
const ep = new AWS.Endpoint("s3.wasabisys.com");
const s3 = new AWS.S3({
accessKeyId: accessKey,
secretAccessKey: secretAccessKey,
bucket: myBucket,
signatureVersion: "v4",
region: regionName,
endpoint: ep
});
const signedUrl = s3.getSignedUrl("putObject", {
Bucket: myBucket,
Key: myKey,
ACL: "public-read",
Expires: signedUrlExpireSeconds,
});
您不需要区域，因为AWS3是全球可用的。 还要仔细检查以下内容:
var AWS = require('aws-sdk');
const myBucket = "my-bucket-name";
const accessKey = "myaccesskey";
const secretAccessKey = "mysecretkey";
const myKey = "codeTest.jpg";
const signedUrlExpireSeconds = 60 * 5; // In 5 minutes
AWS.config.update({
accessKeyId: accessKey,
secretAccessKey: secretAccessKey
});
var s3 = new AWS.S3({
endpoint: new AWS.Endpoint('https://s3.wasabisys.com'),
s3ForcePathStyle: true //prevent an SSL certificate error
});
var params = {
Bucket: myBucket, Key: myKey, Expires: signedUrlExpireSeconds
};
//Download URL
var url = s3.getSignedUrl('getObject', params);
console.log('The URL is', url); // expires in 60 seconds
};
//Upload URL
s3.getSignedUrl('putObject', params, function (err, url) {
console.log(err, url);
});
函数创建指向putObject到S3的预签名url。 这来自NodeJS/Express服务器。
函数createPresignedPost
const S3 = require('aws-sdk/clients/s3');
const s3 = new S3(); //or new S3(config.aws.access), if you want to pass credentials
module.exports.createPresignedPost = async function(remoteFile, expireSeconds = 180) {
const params = {
Bucket: S3_BUCKET_NAME,
Fields: {
key: remoteFile //This is S3 file name, where it will get uploaded
},
Expires: expireSeconds,
Conditions: [
{'acl': 'private'},
["content-length-range", 0, 20971520], //20 MB
["starts-with", "$Content-Type", "image/"] //only images
]
};
return new Promise((resolve, reject) => {
s3.createPresignedPost(params, (err, data) => {
if(err) {
return reject(err);
}
resolve(data);
});
})
}
如果将此函数用作
const signed = await createPresignedPost("uploaded/file");
const body = {
upload_url: signed.url,
upload_fields: Object.assign({acl: 'private'}, signed.fields)
};
return res.status(ht.C.OK).send({success: true, data: body});
和@客户端，
ApiService.imagePost(item._id).then(response => {
signed = response.data.data;
const formData = new FormData();
if (files.length > 0) {
for(const field in signed.upload_fields) {
formData.append(field, signed.upload_fields[field]);
}
formData.append("Content-Type",files[0].type);
formData.append("file",files[0]);
return ApiService.file.upload(signed.upload_url, formData);
}
}
