B4X
DynamoDB - DescribeTable

Returns information about the table, including the current status of the table, when it was created, the primary key schema, and any indexes on the table.
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Dim success As Boolean = False

Dim rest As ChilkatRest
rest.Initialize("rest")

'  Implements the following CURL command:

'  curl -X POST https://dynamodb.us-west-2.amazonaws.com/ \
'    -H "Accept-Encoding: identity" \
'    -H "Content-Type: application/x-amz-json-1.0" \
'    -H "Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>" \
'    -H "X-Amz-Date: <Date>" \
'    -H "X-Amz-Target: DynamoDB_20120810.DescribeTable" \
'    -d '{
'      "TableName":"Thread"
'  }'

'  Use the following online tool to generate REST code from a CURL command
'  Convert a cURL Command to REST Source Code

Dim authAws As ChilkatAuthAws
authAws.Initialize
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"
'  Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2"
authAws.ServiceName = "dynamodb"
'  SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws)

'  URL: https://dynamodb.us-west-2.amazonaws.com/
Dim bTls As Boolean = True
Dim port As Int = 443
Dim bAutoReconnect As Boolean = True
'  Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
success = rest.Connect("dynamodb.us-west-2.amazonaws.com", port, bTls, bAutoReconnect)
If success <> True Then
    Log("ConnectFailReason: " & rest.ConnectFailReason)
    Log(rest.LastErrorText)
    Return
End If


'  Note: The above code does not need to be repeatedly called for each REST request.
'  The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
'  reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
'  made via the Connect method.

'  Use this online tool to generate code from sample JSON:
'  Generate Code to Create JSON

'  The following JSON is sent in the request body.

'  {
'    "TableName": "Thread"
'  }

Dim json As ChilkatJsonObject
json.Initialize
json.UpdateString("TableName", "Thread")

rest.AddHeader("Content-Type", "application/x-amz-json-1.0")
rest.AddHeader("X-Amz-Target", "DynamoDB_20120810.DescribeTable")
rest.AddHeader("Accept-Encoding", "identity")

Dim sbRequestBody As ChilkatStringBuilder
sbRequestBody.Initialize
json.EmitSb(sbRequestBody)
Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
success = rest.FullRequestSb("POST", "/", sbRequestBody, sbResponseBody)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If

Dim respStatusCode As Int = rest.ResponseStatusCode
Log("response status code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Status Code = " & respStatusCode)
    Log("Response Header:")
    Log(rest.ResponseHeader)
    Log("Response Body:")
    Log(sbResponseBody.GetAsString)
    Return
End If


Dim jsonResponse As ChilkatJsonObject
jsonResponse.Initialize
jsonResponse.LoadSb(sbResponseBody)

jsonResponse.EmitCompact = False
Log(jsonResponse.Emit)

'  Sample JSON response:
'  (Sample code for parsing the JSON response is shown below)

'  {
'    "Table": {
'      "TableArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread",
'      "AttributeDefinitions": [
'        {
'          "AttributeName": "ForumName",
'          "AttributeType": "S"
'        },
'        {
'          "AttributeName": "LastPostDateTime",
'          "AttributeType": "S"
'        },
'        {
'          "AttributeName": "Subject",
'          "AttributeType": "S"
'        }
'      ],
'      "CreationDateTime": 1.363729002358E9,
'      "ItemCount": 0,
'      "KeySchema": [
'        {
'          "AttributeName": "ForumName",
'          "KeyType": "HASH"
'        },
'        {
'          "AttributeName": "Subject",
'          "KeyType": "RANGE"
'        }
'      ],
'      "LocalSecondaryIndexes": [
'        {
'          "IndexArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread/index/LastPostIndex",
'          "IndexName": "LastPostIndex",
'          "IndexSizeBytes": 0,
'          "ItemCount": 0,
'          "KeySchema": [
'            {
'              "AttributeName": "ForumName",
'              "KeyType": "HASH"
'            },
'            {
'              "AttributeName": "LastPostDateTime",
'              "KeyType": "RANGE"
'            }
'          ],
'          "Projection": {
'            "ProjectionType": "KEYS_ONLY"
'          }
'        }
'      ],
'      "ProvisionedThroughput": {
'        "NumberOfDecreasesToday": 0,
'        "ReadCapacityUnits": 5,
'        "WriteCapacityUnits": 5
'      },
'      "TableName": "Thread",
'      "TableSizeBytes": 0,
'      "TableStatus": "ACTIVE"
'    }
'  }

'  Sample code for parsing the JSON response...
'  Use the following online tool to generate parsing code from sample JSON:
'  Generate Parsing Code from JSON



Dim AttributeName As String
Dim AttributeType As String
Dim KeyType As String
Dim IndexArn As String
Dim IndexName As String
Dim IndexSizeBytes As Int
Dim ItemCount As Int
Dim ProjectionProjectionType As String
Dim j As Int
Dim count_j As Int

Dim TableTableArn As String = jsonResponse.StringOf("Table.TableArn")
Dim TableCreationDateTime As String = jsonResponse.StringOf("Table.CreationDateTime")
Dim TableItemCount As Int = jsonResponse.IntOf("Table.ItemCount")
Dim TableProvisionedThroughputNumberOfDecreasesToday As Int = jsonResponse.IntOf("Table.ProvisionedThroughput.NumberOfDecreasesToday")
Dim TableProvisionedThroughputReadCapacityUnits As Int = jsonResponse.IntOf("Table.ProvisionedThroughput.ReadCapacityUnits")
Dim TableProvisionedThroughputWriteCapacityUnits As Int = jsonResponse.IntOf("Table.ProvisionedThroughput.WriteCapacityUnits")
Dim TableTableName As String = jsonResponse.StringOf("Table.TableName")
Dim TableTableSizeBytes As Int = jsonResponse.IntOf("Table.TableSizeBytes")
Dim TableTableStatus As String = jsonResponse.StringOf("Table.TableStatus")
Dim i As Int = 0
Dim count_i As Int = jsonResponse.SizeOfArray("Table.AttributeDefinitions")
Do While i < count_i
    jsonResponse.I = i
    AttributeName = jsonResponse.StringOf("Table.AttributeDefinitions[i].AttributeName")
    AttributeType = jsonResponse.StringOf("Table.AttributeDefinitions[i].AttributeType")
    i = i + 1
Loop
i = 0
count_i = jsonResponse.SizeOfArray("Table.KeySchema")
Do While i < count_i
    jsonResponse.I = i
    AttributeName = jsonResponse.StringOf("Table.KeySchema[i].AttributeName")
    KeyType = jsonResponse.StringOf("Table.KeySchema[i].KeyType")
    i = i + 1
Loop
i = 0
count_i = jsonResponse.SizeOfArray("Table.LocalSecondaryIndexes")
Do While i < count_i
    jsonResponse.I = i
    IndexArn = jsonResponse.StringOf("Table.LocalSecondaryIndexes[i].IndexArn")
    IndexName = jsonResponse.StringOf("Table.LocalSecondaryIndexes[i].IndexName")
    IndexSizeBytes = jsonResponse.IntOf("Table.LocalSecondaryIndexes[i].IndexSizeBytes")
    ItemCount = jsonResponse.IntOf("Table.LocalSecondaryIndexes[i].ItemCount")
    ProjectionProjectionType = jsonResponse.StringOf("Table.LocalSecondaryIndexes[i].Projection.ProjectionType")
    j = 0
    count_j = jsonResponse.SizeOfArray("Table.LocalSecondaryIndexes[i].KeySchema")
    Do While j < count_j
        jsonResponse.J = j
        AttributeName = jsonResponse.StringOf("Table.LocalSecondaryIndexes[i].KeySchema[j].AttributeName")
        KeyType = jsonResponse.StringOf("Table.LocalSecondaryIndexes[i].KeySchema[j].KeyType")
        j = j + 1
    Loop
    i = i + 1
Loop