How to set response cache-control header

[chrisgms]

I'm migrating from Minio and am trying to configure the Cache-Control header on the response for assets in a public bucket. Attempting to pass the value to rustfs sets the "x-amz-meta-cache-control" header with the correct value, but the browser does not handle this.

Is there a way to configure the response to use the regular Cache-Control header or is it necessary to proxy the request with Nginx or Cloudflare to set it?

[GatewayJ]

Please use this method:

Bucket: &bucket,

Key: &key,

Body: body,

Metadata: map[string]*string{

"cache-control": aws.String("max-age=3600"),

},

}

Instead of

"x-amz-meta-cache-control": "max-age=3600"

…RustFS will store it as custom object metadata. By S3 conventions, custom metadata is prefixed with x-amz-meta-. So the header actually returned to the browser is:
x-amz-meta-cache-control: max-age=3600
Browsers do not respect x-amz-meta-* headers for caching. They only look at the standard Cache-Control HTTP header.

[chrisgms]

I attempted this (as well as using the top level CacheControl property) e.g.:

import { PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
import fs from "fs";

const rustfs_client = new S3Client({
  region: "us-east-1",
  credentials: {
    accessKeyId: "rustfsadmin",
    secretAccessKey: "rustfsadmin",
  },
  endpoint: "http://localhost:9000",
  forcePathStyle: true,
});

const body = fs.readFileSync("./test.png");

await rustfs_client.send(
  new PutObjectCommand({
    Bucket: "images",
    Key: "test.png",
    Body: body,
    ContentType: "image/png",
    Metadata: {
      "cache-control": "max-age=86400, public",
    },
  })
);

await rustfs_client.send(
  new PutObjectCommand({
    Bucket: "images",
    Key: "test2.png",
    Body: body,
    ContentType: "image/png",
    CacheControl: "max-age=86400, public",
  })
);

However, as you mention, they get converted into the x-amz-meta-* version. Is there a workaround to get the non x-amz-meta-* version of the header or configure response headers for the entire bucket / instance? If not I can put requests behind a proxy.

[GatewayJ]

You might need to be more careful. The code below looks fine, or you could provide some of your code logs.

       s3Client, err := createS3ClientOn(ctx, cfg)
	if err != nil {
		t.Fatalf("创建 S3 客户端失败: %v", err)
	}
	testKey := "meta"
	putInput := &s3.PutObjectInput{
		Bucket:       aws.String(cfg.BucketName),
		Key:          aws.String(testKey),
		Body:         strings.NewReader("test content"),
		CacheControl: aws.String("no-cache"),
	}
	putResp, err := s3Client.PutObject(ctx, putInput)
	if err != nil {
		t.Fatalf("上传对象失败: %v", err)
	}
	t.Logf("✓ 上传对象成功, VersionId: %s", *putResp.VersionId)
	hr, err := s3Client.HeadObject(ctx, &s3.HeadObjectInput{
		Bucket: aws.String(cfg.BucketName),
		Key:    aws.String(testKey),
	})
	fmt.Println(hr)
	t.Logf("✓ TC-015 通过: 删除对象版本测试完成")