Zig

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. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const http = try chilkat.Http.init();
    defer http.deinit();

    http.setAwsAccessKey("AWS_ACCESS_KEY");
    http.setAwsSecretKey("AWS_SECRET_KEY");
    http.setAwsRegion("us-west-2");
    http.setAwsEndpoint("s3-us-west-2.amazonaws.com");

    const bucket_name = "chilkat.logs";
    const object_name = "/AWSLogs/957491831129/CloudTrail/us-west-1/2016/11/12/957491831129_CloudTrail_us-west-1_20161112T1335Z_umXfD4RxHE5nDGuI.json.gz";
    const local_file_path = "qa_output/cloudTrailLog.json.gz";

    http.s3DownloadFile(bucket_name, object_name, local_file_path) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const status_code = http.getLastStatus();
    if (status_code != 200) {
        std.debug.print("Failed to download, response status code = {d}\n", .{status_code});
        return;
    }

    const json_path = "qa_output/cloudTrailLog.json";
    const gzip = try chilkat.Gzip.init();
    defer gzip.deinit();
    gzip.uncompressFile(local_file_path, json_path) catch {
        std.debug.print("{s}\n", .{try gzip.getLastErrorText(alloc)});
        return;
    };

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.loadFile(json_path) catch {};
    json.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // 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"
    //     }
    //   ]
    // }
}