Any library compatible with S3 should work, for .NET that would be either <https://aws.amazon.com/sd

Any library compatible with S3 should work, for .NET that would be either https://aws.amazon.com/sdk-for-net/ or https://min.io/docs/minio/linux/developers/dotnet/minio-dotnet.html
For the former, there is an example here https://developers.cloudflare.com/r2/examples/aws/aws-sdk-net/

EErisa Any library compatible with S3 should work, for .NET that would be either <https...

Miko1907•7/12/23, 11:21 AM

I created a simple ASP.NET Core Web API project. I'm trying to upload files to cloudflare r2 using AWSSDK but I'm getting an error.

using Amazon.S3;
using Amazon.S3.Model;

private readonly IAmazonS3 _s3Client;

public CloudflareR2Controller(IConfiguration configuration)
{
string accessKeyId = "aaa";
string secretAccessKey = "bbb";
string serviceUrl = "https://ccc.r2.cloudflarestorage.com";
AWSCredentials credentials = new BasicAWSCredentials(accessKeyId, secretAccessKey);
AmazonS3Config config = new AmazonS3Config
{
ServiceURL = serviceUrl

};
_s3Client = new AmazonS3Client(credentials, config);
}

[HttpPut("objects/{bucketName}")]
public async Task<IActionResult> UploadObject(string bucketName, [FromBody] string filePath)
{
try
{
PutObjectRequest request = new PutObjectRequest
{
FilePath = @filePath,
BucketName = bucketName,
};

PutObjectResponse response = await _s3Client.PutObjectAsync(request);

Console.WriteLine("ETag: {0}", response.ETag);
return Ok(response);
}
catch (Exception ex)
{
return StatusCode(500, "Error: " + ex.Message);
}
}
1st problem in this code:

"STREAMING-AWS4-HMAC-SHA256-PAYLOAD not implemented"

To fix this issue I am editing the following code:
PutObjectRequest request = new PutObjectRequest
{
FilePath = @filePath,
bucketName = bucketName,
DisablePayloadSigning=true, //new code
};
This time I get another error:

{Please use "STREAMING-AWS4-HMAC-SHA256-PAYLOAD"}

I couldn't solve the problem. Anyone have an idea or an alternative solution?

George Boot•7/12/23, 2:21 PM

Does Cloudflare have plans to support cache range requests for large files to R2? Cloudfront+S3 supports it as well

GGeorge Boot Does Cloudflare have plans to support cache range requests for large files to R2...

Unsmart•7/12/23, 5:15 PM

Probably not? The way cache works is they store the entire file in cache and then return ranges from that so if your file is larger than what can be cached it wont work.

Unsmart•7/12/23, 5:18 PM

I do think there is a bug specifically in the R2 -> Cache behavior where if a file is too big for cache and you request a range it will ignore that and return the entire file where it should return the range and not cache (which I think it what the normal Origin -> Cache behavior is atm). But no clue whats going on around that

Unsmart•7/12/23, 5:21 PM

So a normal origin will also ignore the range request if the file is too big for cache? Not what I have heard from others in here who talk about this issue

SShreejoy Dash Hi, I just had a quick query. Anyway to have custom S3 URL for Cloudflare R2 Bu...

Unsmart•7/12/23, 6:08 PM

Not possible

Unsmart•7/12/23, 6:08 PM

You can use public urls with a custom domain but not presigned s3 urls.
https://developers.cloudflare.com/r2/buckets/public-buckets/

Unsmart•7/12/23, 6:22 PM

Afaik theres no plans to and I doubt it would happen. Why would you want it?

George Boot•7/12/23, 7:07 PM

Cloudfront caches just the range you request. So they don’t only cache full files, but also sub-files. Seems to me Cloudflare could (should?) support that as well

George Boot•7/12/23, 7:08 PM

So cache files aren’t only identified by their url, but also additionally with an optional range

SShreejoy Dash I am trying to give out expirable download links through my website. Till now I ...

Sam•7/12/23, 7:09 PM

Why don’t you want to share the R2 api domain?

Caleb•7/12/23, 11:00 PM

Does anyone know how to use r2 with the cloudflare cdn

Caleb•7/12/23, 11:00 PM

I have a simple website where uses upload files to an r2, and can get files from an r2

Caleb•7/12/23, 11:01 PM

It works but I want to use the cloudflare cdn with it and I can’t find anything in the docs that explains how

Caleb•7/12/23, 11:02 PM

Caleb•7/12/23, 11:02 PM

It’s weird that there isn’t much documentation since it’s one of the key features advertised

Caleb•7/12/23, 11:05 PM

Can you explain a little more, I haven’t set up the custom domain yet, still developing with the dev domain they give you

Caleb•7/12/23, 11:06 PM

Like when you set up the custom domain there’s an option for cdn integration?

Unsmart•7/12/23, 11:06 PM

https://developers.cloudflare.com/r2/buckets/public-buckets/#custom-domains

Public buckets · Cloudflare R2 docs

Public Bucket is a feature that allows users to expose the contents of their R2 buckets directly to the Internet. By default, buckets are never …

Unsmart•7/12/23, 11:06 PM

Custom domains have to use the CDN its not an option

Caleb•7/12/23, 11:07 PM

Oh I see

Caleb•7/12/23, 11:07 PM

Thank you!

Caleb•7/12/23, 11:09 PM

Also this may be a stupid question but say an r2 item is cached and 1000 users request the item, does that count as 1000 r2 read operations or just 1 for the initial retrieval from the r2 bucket

mayakovsky1917•7/12/23, 11:10 PM

just curious, I’m trying to authenticate r2 in a GitHub actions runner. But cloudflare keeps rejecting the ticket

Is this syntax correct or not?

run: |
curl -X PUT "https://api.cloudflare.com/client/v4/accounts/$ACCOUNT/r2/buckets/$BUCKET/objects/output.mp4" \
-H "Authorization: Bearer SECRET" \
-H "Content-Type: video/mp4" \

CCaleb Also this may be a stupid question but say an r2 item is cached and 1000 users r...

Unsmart•7/12/23, 11:12 PM

Cache hits do not go to the R2 service so would not incur further reads. Cache is per data center though so not every requests will be guarantee to have it cached if they hit a different data center. Assuming 1000 requests all hit the same datacenter in a short period of time where the file is still cached it would only be 1 R2 read.

Caleb•7/12/23, 11:13 PM

Cool, thanks

Mmayakovsky1917 just curious, I’m trying to authenticate r2 in a GitHub actions runner. But clou...

Unsmart•7/12/23, 11:14 PM

I dont even think thats an api that exists, you would want to use the S3 API with an S3 API token

mayakovsky1917•7/12/23, 11:14 PM

I asked bing ai

mayakovsky1917•7/12/23, 11:14 PM

I suppose that’s why lol

sexnine•7/13/23, 12:38 AM

Hey there, is there a way to enforce a max file size using S3 presigned URLs? I'm looking to upload files from a browser and using presigned URLs seems like the best way to go about this but don't want my users to be uploading massive files.

kian•7/13/23, 12:39 AM

Not currently - you can sign the content-lengthcontent-length header but that's only an exact length so you'd have to get the length the user plans to upload and then send them a URL for that length.

Kkian Not currently - you can sign the `content-length` header but that's only an exac...

sexnine•7/13/23, 12:40 AM

Thanks, I'll look into that :)

dax•7/13/23, 8:35 AM

how are people tackling post processing use cases with r2 when you can't listen to events?

dax•7/13/23, 8:36 AM

I'm thinking of an delayed action that triggers when the expected file should be uploaded

dax•7/13/23, 8:36 AM

but it'll be too slow

dax•7/13/23, 8:36 AM

hoping to not have my server as the middleman handling the file upload since there's a lot of nuances to that :/

Jake•7/13/23, 8:45 AM

Maybe a weird question, I assume there's no way to bind worker to R2 bucket in another account?

Jake•7/13/23, 9:06 AM

guess I'm moving some domains around, ty!

vassbence•7/13/23, 11:46 AM

No info on global replication for R2 yet, right?

vassbence•7/13/23, 11:46 AM

So they are single region, either EU or US based on where they are created

vassbence•7/13/23, 11:47 AM

Do R2 support the atomic read-after-write consistency of S3?

Any library compatible with S3 should work, for .NET that would be either <https://aws.amazon.com/sd

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