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Repo info
    Hippie Techie

    Hello fellow devs,

    Am facing a problem with the delimiter parameter of the request object for listing objects in the s3 bucket.

    it returns NOT IN results instead of in.

    Anyone faced this problem before can lead me to another possible direction to solve this?

    Hippie Techie
    Jan Chvojka

    Hi all, I have one question and I can't find answer for it (SO, google, numerous tries my own code). How can I instantiate AmazonCognitoIdentityProviderClient?
    I'm using .net core 2 and the code is really simple:

    var credentials = new EnvironmentVariablesAWSCredentials();
    CognitoProvider = new AmazonCognitoIdentityProviderClient(credentials, RegionEndpoint.EUCentral1);

    But AmazonCognitoIdentityProviderClient throws exception
    System.IO.FileNotFoundException: 'Could not find file 'C:\Users\USER\.aws\credentials'.'
    I know what it means, but why is it throwing that exception? I want to use environment credentials and they are all right (EnvironmentVariablesAWSCredentials doesnt complain and Environment.GetEnvironmentVariable on AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY returns correct values).
    I can provide the file on my local environment but I can't do that on production. How am I suppose to pass credentials to cognito client? Am I missing something?

    Can new AmazonS3Client(); use configurations from appsettings.json ?
    I have in my appsettings.json: "AWS": { "Region": ..., "AccessKeyId": ..., "SecretAccessKey":... }, but I cannot create a s3 client
    nvm...this is not a feature
    Hi All, I'm trying to work with Glacier to files from a vault with thousands of files.. not ideal, but that's the job..
    I'm using the ArchiveTransferManager with DownloadAsync
    and as you can imagine 4+ hours per file is too slow.
    Is there a way to initiate the DownloadAsync method using the Expedited Tier?
    Omer Katz
    Hi guys
    I'm trying to list all the tables of a dynamodb instance using the sdk but I'm getting 'AmazonDynamoDBClient.ListTables()' is inaccessible due to its protection level
    This directly contradicts the documentation
    I'm using dot net core 2.1
    On AWS lambda
    Norm Johanson
    @thedrow For .NET Core you need to use the async version of the API because that is all the underlying HttpClient for .NET Core supports.
    @jaeckyl Can you open a GitHub issue for the expedited tier so we can add the feature request to our backlog. The ArchiveTransferManager high level abstraction hasn't been updated for that Glacier feature
    Hi guys, i am trying to do a QueryAsync in DynamoDb with a bool filter. I am getting no result back from the sdk. Are there some problem with filters on bool values?
    For other values it works
           opConfig.QueryFilter =
                new List<ScanCondition>
                    new ScanCondition("Status", ScanOperator.Equal, 10),
                    new ScanCondition("Status", ScanOperator.Equal, 4),
                    new ScanCondition("PlanType", ScanOperator.Equal, "SML"),
                    //new ScanCondition("NormalRoadConditions", ScanOperator.Equal, true)
    The last one gives 0 result count even thou there should be results
            List<string> partionKeys = new List<string>() { "52049E96-14FA-4960-B3CE-F7400C4AC6CD", "01F3DF08-4D0F-4E92-BBE3-8E46BA77E73B", "52117BC1-7256-4C36-868E-465DB2178286" };
            if (!string.IsNullOrEmpty(TableName))
                AWSConfigsDynamoDB.Context.TypeMappings[typeof(Plan)] = new Amazon.Util.TypeMapping(typeof(Plan), TableName);
            var start = DateTime.Now;
            int totalCount = 0;
            var config = new DynamoDBContextConfig { Conversion = DynamoDBEntryConversion.V2 };
            var client = new AmazonDynamoDBClient(new StoredProfileAWSCredentials("sandbox"), RegionEndpoint.EUWest1);
            DbContext = new DynamoDBContext(client, config);
            var opConfig = new DynamoDBOperationConfig { IndexName = "OrganizationId-Created-index" };
            opConfig.QueryFilter =
                new List<ScanCondition>
                    new ScanCondition("Status", ScanOperator.Equal, 10),
                    new ScanCondition("Status", ScanOperator.Equal, 4),
                    new ScanCondition("PlanType", ScanOperator.Equal, "SML"),
                    //new ScanCondition("NormalRoadConditions", ScanOperator.Equal, true)
            foreach (var partionKey in partionKeys)
                var result = Program.DbContext.QueryAsync<Plan>(partionKey.ToLower(), opConfig);
                while (!result.IsDone)
                    var plans = result.GetNextSetAsync().Result;
                    totalCount += plans.Count;
    Here is the whole code
    I should maybe also say it works fine with the "raw stringy concat" model
    well this place was dead. i guess i will try my luck on github
    Victor Frank
    Has anyone used DI for aws lambda functions? I was wondering if there was a recommended way. currently i am just using the built in dotnetcore DI
    public async Task<string> FunctionHandler(S3Event evnt, ILambdaContext context)
                var serviceCollection = new ServiceCollection();
                // service provider 
                var serviceProvider = serviceCollection.BuildServiceProvider();
                // entry to run app 
                var service = serviceProvider.GetService<ApplicationService>();
                return await service.LocalFunctionHandler(evnt, context);
            public void ConfigureServices(IServiceCollection services)
                services.AddSingleton<IAmazonS3>(s3 => new AmazonS3Client(Amazon.RegionEndpoint.USEast1));
                services.AddSingleton<IAmazonBatch>(batch => new AmazonBatchClient(Amazon.RegionEndpoint.USEast1));
    Hi there, I just post on Github regarding Unity support. With Unity supporting a newer version of Mono (finally), I was wondering if it would be possible/easy to get the aws-sdk-net running in Unity. I had a look, and it looks like the biggest blocker is the use of System.Configuration which is not supported, but should otherwise be fine, right? :)
    Anyway, I am trying to decide a backend, and I love AWS's offerings but the Unity SDK being so outdated is a real bummer. Google/Google Cloud has recently partnered with Unity to provide a complete multiplayer solution for unity. I think AWS can easily rival them.
    Hi, is it possible to build an app to manage s3 for uploading file using username and password instead of access id and key?
    @Gkanda80 not sure you can do it using IAM accounts. What are you trying to do? Perhaps you can tie usernames and passwords to keys within your app?
    Is anyone else having problems uploading pdf docs to s3? It seems that when the key ends with .pdf PutObject doesn’t return ie it hangs. If I change the extension to .txt or -pdf it works perfectly. I’m guessing the api is doing something extra when it detects the application/pdf ContentType.
    Hey, I have created a user pool on Cognito and am able to authenticate the user using the _signInManager.PasswordSignInAsync() in a .netcore app that has both razor pages and API. Now i want to access the ID token so that i can pass it for any subsequent calls to the API from the client. once i have signed in how to i access the ID token?
    M J Khan
    @gopinathrimc I am trying the same thing
    var token = await HttpContext.GetTokenAsync("access_token").ConfigureAwait(false);
    var token1 = await HttpContext.GetTokenAsync("id_token").ConfigureAwait(false);
    var accesToken = Request.Headers["Authorization"];
    var refreshToken = await HttpContext.GetTokenAsync("refresh_token").ConfigureAwait(false);
    return null
    @jobairkhan dont know if the approach am taking is correct, but what i ended up doing is after _signInManager.PasswordSignInAsync() , i made a separate call using SrpAuth to get to the token.
            AuthFlowResponse authResponse = await user.StartWithSrpAuthAsync(new InitiateSrpAuthRequest { Password = inPassword });
            string idToken = authResponse.AuthenticationResult.IdToken;
    Shawn Black
    @sstevenkang What is the process for approving pull requests?
    Royi Namir
    Hi. I'm currently sending a message to an SQS queue with success.
    However I've noticed that when I GET/read a message , it says "List of messages" ?
    In other words , how come I send a single message but it shows me a List of messages when I want to get a message .....?
    Mike Mahon
    anyone have an example of using AWSSDK.AWSHealth in c#?
    Alexey Ashurok
    Hi, is any maintainers here? Issue #1196 was closed, but the problem still exists.
    We reword it to match root case better but have no response from @klaytaybai =(
    Can someone reopen it?
    There is not possible to make PutObjectRequest with key ending with whitespaces.
    Hi @aotd1, both PutObject and GetObject allow keys with whitespaces--as they should. Using a VersionId with whitespace at the end is not supported by the SDK because it is not supported by the S3 service. If we were to reopen this, it would probably be very low priority for some time unless the service started supporting VersionIds with whitespace at the end.
    Alexey Ashurok

    @klaytaybai VersionId with whitespace is only our problem, I understand it.
    The common problem is that this code crashes too:

    var client = new AmazonS3Client(bucketRegion);
    var request = new PutObjectRequest
                        Key = "test ",
                        BucketName = "bucket",
                        ContentBody = "test"
    using (var response = await client.PutObjectAsync(request))

    with SignatureDoesNotMatch.

    It's because signing request don't use TrimEnd(), but CanonicalizedResource use.
    So we send http://blablabla/?key=test, but sign
    @aotd1, let's move this conversation back to the issue. Could you please provide a link to a repro solution so I can see if there are other configurations that may be involved? I have been able to get this request to work consistently using the same style of parameters (i.e. space at end of key).
    is there any sample out there for sharing DB Connection between lambda execution?
    John Harcourt

    I'm receiving S3 errors when running a project in Visual Studio 2019, but which works just fine in VS 2017. The error happens when instantiating an AmazonS3Client :

    AmazonS3Client s3Client = new AmazonS3Client(RegionEndpoint.USEast1);

    and getting the error:
    System.ArgumentException HResult=0x80070057 Message=An item with the same key has already been added. Key: System.Collections.Generic.Dictionary2[System.String,System.Collections.Generic.Dictionary2[System.String,System.Object]] Source=System.Private.CoreLib StackTrace: at System.ThrowHelper.ThrowAddingDuplicateWithKeyArgumentException[T](T key)

    Matt Perry
    Anyone know where there are any samples for .net core to pretty much any of the services? Struggling to find examples, especially to Amazon Connect.
    Michael Jan
    @dillorscroft same here, I tried looking for examples for .net core and pretty much gave up, the support is very poor for .net core in regards to aws. I ended up using Xamarin with Azure instead.
    @dillorscroft, what are you hoping to do with Amazon Connect? If we can get more customer feedback about which services and features need more documentation and samples, we can try to make those a higher priority.
    Does anybody know how to solve uploading files with Chinese characters name?When I upload them ,I will get a exception SignatureDoesNotMatch.