Node.js

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. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var http = new chilkat.Http();

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

    var bucketName = "chilkat.logs";
    var objectName = "/AWSLogs/957491831129/CloudTrail/us-west-1/2016/11/12/957491831129_CloudTrail_us-west-1_20161112T1335Z_umXfD4RxHE5nDGuI.json.gz";
    var localFilePath = "qa_output/cloudTrailLog.json.gz";

    success = http.S3_DownloadFile(bucketName,objectName,localFilePath);
    if (success !== true) {
        console.log(http.LastErrorText);
        return;
    }

    var statusCode = http.LastStatus;
    if (statusCode !== 200) {
        console.log("Failed to download, response status code = " + statusCode);
        return;
    }

    var jsonPath = "qa_output/cloudTrailLog.json";
    var gzip = new chilkat.Gzip();
    success = gzip.UncompressFile(localFilePath,jsonPath);
    if (success == false) {
        console.log(gzip.LastErrorText);
        return;
    }

    var json = new chilkat.JsonObject();
    json.LoadFile(jsonPath);
    json.EmitCompact = false;
    console.log(json.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"
    //      }
    //    ]
    //  }

}

chilkatExample();