(.NET Core C#) S3 Upload String using AWS Signature Version 2

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2.

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// Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
// of a string variable to an object in a bucket.

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Rest rest = new Chilkat.Rest();

// Connect to the Amazon AWS REST server.
bool bTls = true;
int port = 443;
bool bAutoReconnect = true;
// The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
bool success = rest.Connect("chilkat100.s3.amazonaws.com",port,bTls,bAutoReconnect);

// ----------------------------------------------------------------------------
// Important: For buckets created in regions outside us-east-1,
// there are three important changes that need to be made.
// See Working with S3 Buckets in Non-us-east-1 Regions for the details.
// ----------------------------------------------------------------------------

// Provide AWS credentials for the REST call.
Chilkat.AuthAws authAws = new Chilkat.AuthAws();
authAws.AccessKey = "AWS_ACCESS_KEY";
authAws.SecretKey = "AWS_SECRET_KEY";
authAws.ServiceName = "s3";

// For AWS Signature Version 2, the following two properties need to be set:
authAws.SignatureVersion = 2;
// See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
// The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
// the URI path passed to the FullRequestString method below.
authAws.CanonicalizedResourceV2 = "/chilkat100/hamlet_play.xml";

success = rest.SetAuthAws(authAws);

// Load a text file into memory.
Chilkat.FileAccess fac = new Chilkat.FileAccess();
string fileContents = fac.ReadEntireTextFile("qa_data/xml/hamlet.xml","utf-8");
if (fac.LastMethodSuccess != true) {
    Debug.WriteLine(fac.LastErrorText);
    return;
}

// To send the file in gzip or deflate compressed format, set the Content-Encoding request
// header to "gzip" or "deflate".  (this is optional)
success = rest.AddHeader("Content-Encoding","gzip");

// Indicate the Content-Type of our upload.  (This is optional)
success = rest.AddHeader("Content-Type","text/xml");

// We can add an "Expect: 100-continue" header so that if the request is rejected
// by the server immediately after receiving the request header, it can respond
// and the client (Chilkat) can avoid sending the file data.
// (this is optional)
success = rest.AddHeader("Expect","100-continue");

// Upload the file to Amazon S3.
string responseBodyStr = rest.FullRequestString("PUT","/hamlet_play.xml",fileContents);
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// Did we get a 200 response indicating success?
int statusCode = rest.ResponseStatusCode;
if (statusCode != 200) {
    Debug.WriteLine("Error response: " + responseBodyStr);
    Debug.WriteLine("Status code: " + Convert.ToString(statusCode) + ", Status text: " + rest.ResponseStatusText);
    return;
}

Debug.WriteLine("File successfully uploaded.");