@aws-sdk/s3-request-presigner v3.565.0
@aws-sdk/s3-request-presigner
This package provides a presigner based on signature V4 that will attempt to generate signed url for S3.
Get Presigned URL with Client and Command
You can generated presigned url from S3 client and command. Here's the example:
JavaScript Example:
const { getSignedUrl } = require("@aws-sdk/s3-request-presigner");
const { S3Client, GetObjectCommand } = require("@aws-sdk/client-s3");
const client = new S3Client(clientParams);
const command = new GetObjectCommand(getObjectParams);
const url = await getSignedUrl(client, command, { expiresIn: 3600 });
ES6 Example
import { getSignedUrl } from "@aws-sdk/s3-request-presigner";
import { S3Client, GetObjectCommand } from "@aws-sdk/client-s3";
const client = new S3Client(clientParams);
const command = new GetObjectCommand(getObjectParams);
const url = await getSignedUrl(client, command, { expiresIn: 3600 });
You can get signed URL for other S3 operations too, like PutObjectCommand
.
expiresIn
config from the examples above is optional. If not set, it's default
at 900
.
If your request contains server-side encryption(SSE*
) configurations, because
of S3 limitation, you need to send corresponding headers along with the
presigned url. For more information, please go to S3 SSE reference
If you already have a request, you can pre-sign the request following the section bellow.
Get Presigned URL from an Existing Request
JavaScript Example:
const { S3RequestPresigner } = require("@aws-sdk/s3-request-presigner");
const { Sha256 } = require("@aws-crypto/sha256-browser");
const { Hash } = require("@smithy/hash-node");
const signer = new S3RequestPresigner({
region: regionProvider,
credentials: credentialsProvider,
sha256: Hash.bind(null, "sha256"), // In Node.js
//sha256: Sha256 // In browsers
});
const presigned = await signer.presign(request);
ES6 Example:
import { S3RequestPresigner } from "@aws-sdk/s3-request-presigner";
import { Sha256 } from "@aws-crypto/sha256-browser";
import { Hash } from "@aws-sdk/hash-node";
const signer = new S3RequestPresigner({
region: regionProvider,
credentials: credentialsProvider,
sha256: Hash.bind(null, "sha256"), // In Node.js
//sha256: Sha256 // In browsers
});
const presigned = await signer.presign(request);
To avoid redundant construction parameters when instantiating the s3 presigner, you can simply spread the configuration of an existing s3 client and supply it to the presigner's constructor.
//s3 is instantiated from S3Client from @aws-sdk/client-s3-* packages
const signer = new S3RequestPresigner({
...s3.config,
});
If your request contains server-side encryption(x-amz-server-side-encryption*
)
headers, because of S3 limitation, you need to send these headers along
with the presigned url. That is to say, the url only from calling formatUrl()
to presigned
is not sufficient to make a request. You need to send the
server-side encryption headers along with the url. These headers remain in the
presigned.headers
For more information, please go to S3 SSE reference
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