Chilkat Online Tools

ListChangedBlocks Node.js Example

Amazon Elastic Block Store

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node17-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node17-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node17-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node17-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node17-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node17-macosx');
}

function chilkatExample() {

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

    var rest = new chilkat.Rest();
    var success;

    var authAws = new chilkat.AuthAws();
    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 = "ebs";
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.SetAuthAws(authAws);

    // URL: https://ebs.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = rest.Connect("ebs.us-west-2.amazonaws.com",443,true,true);
    if (success !== true) {
        console.log("ConnectFailReason: " + rest.ConnectFailReason);
        console.log(rest.LastErrorText);
        return;
    }

    rest.AddHeader("Content-Type","application/x-amz-json-1.1");
    rest.AddHeader("X-Amz-Target","ListChangedBlocks");

    var sbResponseBody = new chilkat.StringBuilder();
    success = rest.FullRequestNoBodySb("GET","/snapshots/{secondSnapshotId}/changedblocks",sbResponseBody);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    var respStatusCode = rest.ResponseStatusCode;
    console.log("response status code = " + respStatusCode);
    if (respStatusCode !== 200) {
        console.log("Response Header:");
        console.log(rest.ResponseHeader);
        console.log("Response Body:");
        console.log(sbResponseBody.GetAsString());
        return;
    }

    var jResp = new chilkat.JsonObject();
    jResp.LoadSb(sbResponseBody);

    // The following code parses the JSON response.
    // A sample JSON response is shown below the sample code.

    // Use this online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    var BlockIndex;
    var FirstBlockToken;
    var SecondBlockToken;

    var BlockSize = jResp.IntOf("BlockSize");
    var ExpiryTime = jResp.IntOf("ExpiryTime");
    var NextToken = jResp.StringOf("NextToken");
    var VolumeSize = jResp.IntOf("VolumeSize");
    var i = 0;
    var count_i = jResp.SizeOfArray("ChangedBlocks");
    while (i < count_i) {
        jResp.I = i;
        BlockIndex = jResp.IntOf("ChangedBlocks[i].BlockIndex");
        FirstBlockToken = jResp.StringOf("ChangedBlocks[i].FirstBlockToken");
        SecondBlockToken = jResp.StringOf("ChangedBlocks[i].SecondBlockToken");
        i = i+1;
    }

    // A sample JSON response body parsed by the above code:

    // {
    //   "BlockSize": number,
    //   "ChangedBlocks": [
    //     {
    //       "BlockIndex": number,
    //       "FirstBlockToken": "string",
    //       "SecondBlockToken": "string"
    //     }
    //   ],
    //   "ExpiryTime": number,
    //   "NextToken": "string",
    //   "VolumeSize": number
    // }

}

chilkatExample();