(Xojo Plugin) DynamoDB - PutItem

Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new item already exists in the specified table, the new item completely replaces the existing item.

For more information, see https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_PutItem.html

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

Dim rest As New Chilkat.Rest
Dim success As Boolean

// 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.PutItem" \
//   -d '{
//     "TableName": "Thread",
//     "Item": {
//         "LastPostDateTime": {
//             "S": "201303190422"
//         },
//         "Tags": {
//             "SS": ["Update","Multiple Items","HelpMe"]
//         },
//         "ForumName": {
//             "S": "Amazon DynamoDB"
//         },
//         "Message": {
//             "S": "I want to update multiple items in a single call. What is the best way to do that?"
//         },
//         "Subject": {
//             "S": "How do I update multiple items?"
//         },
//         "LastPostedBy": {
//             "S": "fred@example.com"
//         }
//     },
//     "ConditionExpression": "ForumName <> :f and Subject <> :s",
//     "ExpressionAttributeValues": {
//         ":f": {"S": "Amazon DynamoDB"},
//         ":s": {"S": "How do I update multiple items?"}
//     }
// }'

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

Dim authAws As New Chilkat.AuthAws
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
success = rest.SetAuthAws(authAws)

// URL: https://dynamodb.us-west-2.amazonaws.com/
Dim bTls As Boolean
bTls = True
Dim port As Int32
port = 443
Dim bAutoReconnect As Boolean
bAutoReconnect = True
success = rest.Connect("dynamodb.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)
If (success <> True) Then
    System.DebugLog("ConnectFailReason: " + Str(rest.ConnectFailReason))
    System.DebugLog(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",
//   "Item": {
//     "LastPostDateTime": {
//       "S": "201303190422"
//     },
//     "Tags": {
//       "SS": [
//         "Update",
//         "Multiple Items",
//         "HelpMe"
//       ]
//     },
//     "ForumName": {
//       "S": "Amazon DynamoDB"
//     },
//     "Message": {
//       "S": "I want to update multiple items in a single call. What is the best way to do that?"
//     },
//     "Subject": {
//       "S": "How do I update multiple items?"
//     },
//     "LastPostedBy": {
//       "S": "fred@example.com"
//     }
//   },
//   "ConditionExpression": "ForumName <> :f and Subject <> :s",
//   "ExpressionAttributeValues": {
//     ":f": {
//       "S": "Amazon DynamoDB"
//     },
//     ":s": {
//       "S": "How do I update multiple items?"
//     }
//   }
// }

Dim json As New Chilkat.JsonObject
success = json.UpdateString("TableName","Thread")
success = json.UpdateString("Item.LastPostDateTime.S","201303190422")
success = json.UpdateString("Item.Tags.SS[0]","Update")
success = json.UpdateString("Item.Tags.SS[1]","Multiple Items")
success = json.UpdateString("Item.Tags.SS[2]","HelpMe")
success = json.UpdateString("Item.ForumName.S","Amazon DynamoDB")
success = json.UpdateString("Item.Message.S","I want to update multiple items in a single call. What is the best way to do that?")
success = json.UpdateString("Item.Subject.S","How do I update multiple items?")
success = json.UpdateString("Item.LastPostedBy.S","fred@example.com")
success = json.UpdateString("ConditionExpression","ForumName <> :f and Subject <> :s")
success = json.UpdateString("ExpressionAttributeValues.:f.S","Amazon DynamoDB")
success = json.UpdateString("ExpressionAttributeValues.:s.S","How do I update multiple items?")

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

Dim sbRequestBody As New Chilkat.StringBuilder
success = json.EmitSb(sbRequestBody)
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

Dim respStatusCode As Int32
respStatusCode = rest.ResponseStatusCode
System.DebugLog("response status code = " + Str(respStatusCode))
If (respStatusCode >= 400) Then
    System.DebugLog("Response Status Code = " + Str(respStatusCode))
    System.DebugLog("Response Header:")
    System.DebugLog(rest.ResponseHeader)
    System.DebugLog("Response Body:")
    System.DebugLog(sbResponseBody.GetAsString())
    Return
End If

Dim jsonResponse As New Chilkat.JsonObject
success = jsonResponse.LoadSb(sbResponseBody)

jsonResponse.EmitCompact = False
System.DebugLog(jsonResponse.Emit())