c# - AWSSDK S3 for ASP.NET Core -

i have tried upload file amazon s3 using awssdk .net core, got exception below:

the write operation failed, see inner exception.

the connection server terminated abnormally

no matter connect singapore (global) or beijing (cn-north-1), still has problem.

can give me suggestions solve problem?

this version , codes, please!

.net core / 1.1.1
awssdk.s3 / 3.3.5.10

startup.cs

// add framework services. services.addmvc(); services.adddefaultawsoptions(configuration.getawsoptions()); services.addawsservice<iamazons3>(); 

appsettings.json

"aws_access_key_id": "xxxxxxxxxx", "aws_secret_access_key": "xxxxxxxxxxxxxxxxxxxxxxxx", "aws": {   "region": "cn-north-1",   "serviceurl": "https://s3.cn-north-1.amazonaws.com.cn" } 

controller

private readonly iamazons3 _amazons3client;  public userscontroller(        iamazons3 amazons3client) {      _amazons3client = amazons3client; }   [httppost] [route("users/picture/upload")] public async task<iactionresult> uploaduserphoto(string userid) {     amazon.s3.model.putobjectresponse response = await         _amazons3client.putobjectasync(        new amazon.s3.model.putobjectrequest()        {            bucketname = "mybucket",            key = filename,            inputstream = uploadfiles[0].openreadstream(),            cannedacl = s3cannedacl.publicread        }); }