How do I set Content-Type when uploading to S3 with AWS CLI?

Question

I'm trying to set up S3 static website hosting, but it appears to return 403 on any of my objects that don't have the Content-Type metadata field set in the AWS console. I cannot figure out how to do this with the AWS CLI tool.

Using the --metadata option appears to work:

$ aws s3api put-object --bucket <bucket> --key foo.html --body foo.html --metadata Content-Type=text/html
{
    "ETag": "\"fd5ff7743e5ed1e1c304eb1c34e8e39f\""
}
$ aws s3api head-object --bucket <bucket> --key foo.html
{
    "AcceptRanges": "bytes",
    "ContentType": "binary/octet-stream",
    "LastModified": "Wed, 15 Apr 2015 06:39:48 GMT",
    "ContentLength": 189,
    "ETag": "\"fd5ff7743e5ed1e1c304eb1c34e8e39f\"",
    "Metadata": {
        "content-type": "text/html"
    }
}

But the Content-Type field on the object isn't visible in the "Metadata" section of the AWS console, and I get a 403 when trying to access the file in a browser.

Using the --content-type option also doesn't work:

$ aws s3api put-object --bucket <bucket> --key foo.html --body foo.html --content-type text/html
{
    "ETag": "\"fd5ff7743e5ed1e1c304eb1c34e8e39f\""
}
$ aws s3api head-object --bucket <bucket> --key foo.html
{
    "AcceptRanges": "bytes",
    "ContentType": "text/html",
    "LastModified": "Wed, 15 Apr 2015 06:46:49 GMT",
    "ContentLength": 189,
    "ETag": "\"fd5ff7743e5ed1e1c304eb1c34e8e39f\"",
    "Metadata": {}
}

While it appears to set some sort of special ContentType property, there still isn't a Content-Type metadata field in the AWS console, nor can I access the file in a browser.

I've also tried similar commands (aws s3 cp, aws s3 sync), with no luck. I have the bucket policy set to publicly-readable.

Answer 1

Your second example with --content-type is the way to set content type for an object. The JSON response displayed is mapping the Content-Type header in the HTTP response to the ContentType key, but it corresponds to the actual Content-Type header of the object. I confirmed that the content type value does show up in the metadata section in the console when using --content-type.

$ aws s3api put-object --bucket bucket --key foo.json --body foo.json --content-type application/json --acl public-read

$ aws s3api head-object --bucket jamesls-test-sync --key foo.json
{
    "AcceptRanges": "bytes",
    "ContentType": "application/json",
    "LastModified": "Wed, 15 Apr 2015 17:18:58 GMT",
    "ContentLength": 0,
    "ETag": "\"d41d8cd98f00b204e9800998ecf8427e\"",
    "Metadata": {}
}

Also using curl, we can see the content type header is set:

$ curl -I https://bucket.s3.amazonaws.com/foo.json
HTTP/1.1 200 OK
x-amz-id-2: ZlSg1aDUBu7z+9gWUg24uRn2TioI0hk2AGBBZ1iVbpUkv8RTrHWovzbHxL/y21Qe
x-amz-request-id: 8568C73EB95EE5A6
Date: Wed, 15 Apr 2015 17:20:42 GMT
Last-Modified: Wed, 15 Apr 2015 17:18:58 GMT
ETag: "d41d8cd98f00b204e9800998ecf8427e"
Accept-Ranges: bytes
Content-Type: application/json
Content-Length: 0
Server: AmazonS3