(Lianja) 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 Lianja Extension Download Chilkat Lianja Extension

loRest = createobject("CkRest")

// 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

loAuthAws = createobject("CkAuthAws")
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.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.)
loAuthAws.Region = "us-west-2"
loAuthAws.ServiceName = "dynamodb"
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
loRest.SetAuthAws(loAuthAws)

// URL: https://dynamodb.us-west-2.amazonaws.com/
llBTls = .T.
lnPort = 443
llBAutoReconnect = .T.
llSuccess = loRest.Connect("dynamodb.us-west-2.amazonaws.com",lnPort,llBTls,llBAutoReconnect)
if (llSuccess <> .T.) then
    ? "ConnectFailReason: " + str(loRest.ConnectFailReason)
    ? loRest.LastErrorText
    release loRest
    release loAuthAws
    return
endif

// 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?"
//     }
//   }
// }

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

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

loSbRequestBody = createobject("CkStringBuilder")
loJson.EmitSb(loSbRequestBody)
loSbResponseBody = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestSb("POST","/",loSbRequestBody,loSbResponseBody)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    release loAuthAws
    release loJson
    release loSbRequestBody
    release loSbResponseBody
    return
endif

lnRespStatusCode = loRest.ResponseStatusCode
? "response status code = " + str(lnRespStatusCode)
if (lnRespStatusCode >= 400) then
    ? "Response Status Code = " + str(lnRespStatusCode)
    ? "Response Header:"
    ? loRest.ResponseHeader
    ? "Response Body:"
    ? loSbResponseBody.GetAsString()
    release loRest
    release loAuthAws
    release loJson
    release loSbRequestBody
    release loSbResponseBody
    return
endif

loJsonResponse = createobject("CkJsonObject")
loJsonResponse.LoadSb(loSbResponseBody)

loJsonResponse.EmitCompact = .F.
? loJsonResponse.Emit()


release loRest
release loAuthAws
release loJson
release loSbRequestBody
release loSbResponseBody
release loJsonResponse