Xbase++

Download S3 CloudTrail Log and Un-Gzip

See more Amazon S3 Examples

Demonstrates how to download a Amazon CloudTrail log from an S3 bucket. The file in this example is a .json.gz. The file is uncompressed and the JSON parsed. Xbase++

LOCAL nSuccess
LOCAL oHttp
LOCAL cBucketName
LOCAL cObjectName
LOCAL cLocalFilePath
LOCAL nStatusCode
LOCAL cJsonPath
LOCAL oGzip
LOCAL oJson

nSuccess := 0

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

oHttp := CreateObject("Chilkat.Http")

oHttp:AwsAccessKey := "AWS_ACCESS_KEY"
oHttp:AwsSecretKey := "AWS_SECRET_KEY"
oHttp:AwsRegion := "us-west-2"
oHttp:AwsEndpoint := "s3-us-west-2.amazonaws.com"

cBucketName := "chilkat.logs"
cObjectName := "/AWSLogs/957491831129/CloudTrail/us-west-1/2016/11/12/957491831129_CloudTrail_us-west-1_20161112T1335Z_umXfD4RxHE5nDGuI.json.gz"
cLocalFilePath := "qa_output/cloudTrailLog.json.gz"

nSuccess := oHttp:S3_DownloadFile(cBucketName, cObjectName, cLocalFilePath)
IF (nSuccess != 1)
    ? oHttp:LastErrorText
    oHttp:destroy()
    RETURN
ENDIF

nStatusCode := oHttp:LastStatus
IF (nStatusCode != 200)
    ? "Failed to download, response status code = " + Str(nStatusCode)
    oHttp:destroy()
    RETURN
ENDIF

cJsonPath := "qa_output/cloudTrailLog.json"
oGzip := CreateObject("Chilkat.Gzip")
nSuccess := oGzip:UncompressFile(cLocalFilePath, cJsonPath)
IF (nSuccess == 0)
    ? oGzip:LastErrorText
    oHttp:destroy()
    oGzip:destroy()
    RETURN
ENDIF

oJson := CreateObject("Chilkat.JsonObject")
oJson:LoadFile(cJsonPath)
oJson:EmitCompact := 0
? oJson:Emit()

//  Sample JSON is shown below.
//  Go to http://tools.chilkat.io/jsonParse.cshtml 
//  and copy/paste the JSON into the online tool to generate parsing code.

//  {
//    "Records": [
//      {
//        "eventVersion": "1.05",
//        "userIdentity": {
//          "type": "Root",
//          "principalId": "954591834127",
//          "arn": "arn:aws:iam::954591834127:root",
//          "accountId": "954591834127",
//          "accessKeyId": "ASIAJ3DEMXUXI43B6FYQ",
//          "sessionContext": {
//            "attributes": {
//              "mfaAuthenticated": "false",
//              "creationDate": "2016-11-12T13:09:31Z"
//            }
//          }
//        },
//        "eventTime": "2016-11-12T13:34:39Z",
//        "eventSource": "cloudtrail.amazonaws.com",
//        "eventName": "DescribeTrails",
//        "awsRegion": "us-west-1",
//        "sourceIPAddress": "98.228.98.57",
//        "userAgent": "console.amazonaws.com",
//        "requestParameters": {
//          "trailNameList": [
//          ]
//        },
//        "responseElements": null,
//        "requestID": "c2a0376c-a8dc-11e6-89e7-85ac5ce5ee56",
//        "eventID": "eb5afd70-dae1-41f0-82b4-91c3c936d9ba",
//        "eventType": "AwsApiCall",
//        "recipientAccountId": "954591834127"
//      }
//    ]
//  }

oHttp:destroy()
oGzip:destroy()
oJson:destroy()