Visual Basic 6.0

DynamoDB - PutItem

See more Amazon DynamoDB Examples

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. Visual Basic 6.0

Dim success As Long
success = 0

Dim rest As New ChilkatRest

' 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 ChilkatAuthAws
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 Long
bTls = 1
Dim port As Long
port = 443
Dim bAutoReconnect As Long
bAutoReconnect = 1
success = rest.Connect("dynamodb.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)
If (success <> 1) Then
    Debug.Print "ConnectFailReason: " & rest.ConnectFailReason
    Debug.Print rest.LastErrorText
    Exit Sub
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 ChilkatJsonObject
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 ChilkatStringBuilder
success = json.EmitSb(sbRequestBody)
Dim sbResponseBody As New ChilkatStringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

Dim respStatusCode As Long
respStatusCode = rest.ResponseStatusCode
Debug.Print "response status code = " & respStatusCode
If (respStatusCode >= 400) Then
    Debug.Print "Response Status Code = " & respStatusCode
    Debug.Print "Response Header:"
    Debug.Print rest.ResponseHeader
    Debug.Print "Response Body:"
    Debug.Print sbResponseBody.GetAsString()
    Exit Sub
End If

Dim jsonResponse As New ChilkatJsonObject
success = jsonResponse.LoadSb(sbResponseBody)

jsonResponse.EmitCompact = 0
Debug.Print jsonResponse.Emit()