Dart
Dart
EC2 Check Instance Status
See more Amazon EC2 Examples
Demonstrates how to send a request to check the status of Amazon EC2 instances.Chilkat Dart Downloads
import 'package:chilkat/chilkat.dart';
void main() {
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
final rest = CkRest();
// Connect to the Amazon AWS server.
// such as https://ec2.amazonaws.com/
final bTls = true;
final port = 443;
final bAutoReconnect = true;
rest.connect('ec2.us-west-2.amazonaws.com', port, bTls, bAutoReconnect);
// Provide AWS credentials for the REST call.
final authAws = CkAuthAws();
authAws.accessKey = 'AWS_ACCESS_KEY';
authAws.secretKey = 'AWS_SECRET_KEY';
// the region should match the region part of the domain passed to the REST connect method (above).
authAws.region = 'us-west-2';
authAws.serviceName = 'ec2';
rest.setAuthAws(authAws);
rest.addQueryParam('Action', 'DescribeInstanceStatus');
rest.addQueryParam('Version', '2016-11-15');
rest.addQueryParam('InstanceId.1', 'i-999719995399c9999');
// If you have additional instances to check, then add them with .2, .3, etc.
rest.addQueryParam('InstanceId.2', 'i-999719995399c0000');
rest.addQueryParam('InstanceId.3', 'i-999719995399c0111');
// ...
// Instead of checking specific instances, you can check all instances by
// sending the IncludeAllInstances param
rest.addQueryParam('IncludeAllInstances', 'true');
final String responseXml;
try {
responseXml = rest.fullRequestNoBody('GET', '/');
} on ChilkatException catch (e) {
print(e.lastErrorText);
return;
}
// A successful response will have a status code equal to 200.
if (rest.responseStatusCode != 200) {
print('response status code = ${rest.responseStatusCode}');
print('response status text = ${rest.responseStatusText}');
print('response header: ${rest.responseHeader}');
print('response body: $responseXml');
return;
}
// Examine the successful XML response.
final xml = CkXml();
xml.loadXml(responseXml);
print(xml.getXml());
// Here is a sample response:
// Use this online tool to generate parsing code from sample XML:
// Generate Parsing Code from XML
// <DescribeInstanceStatusResponse xmlns="http://ec2.amazonaws.com/doc/2016-11-15/">
// <requestId>3be1508e-c444-4fef-89cc-0b1223c4f02fEXAMPLE</requestId>
// <instanceStatusSet>
// <item>
// <instanceId>i-1234567890abcdef0</instanceId>
// <availabilityZone>us-east-1d</availabilityZone>
// <instanceState>
// <code>16</code>
// <name>running</name>
// </instanceState>
// <systemStatus>
// <status>impaired</status>
// <details>
// <item>
// <name>reachability</name>
// <status>failed</status>
// <impairedSince>YYYY-MM-DDTHH:MM:SS.000Z</impairedSince>
// </item>
// </details>
// </systemStatus>
// <instanceStatus>
// <status>impaired</status>
// <details>
// <item>
// <name>reachability</name>
// <status>failed</status>
// <impairedSince>YYYY-MM-DDTHH:MM:SS.000Z</impairedSince>
// </item>
// </details>
// </instanceStatus>
// <eventsSet>
// <item>
// <code>instance-retirement</code>
// <description>The instance is running on degraded hardware</description>
// <notBefore>YYYY-MM-DDTHH:MM:SS+0000</notBefore>
// <notAfter>YYYY-MM-DDTHH:MM:SS+0000</notAfter>
// </item>
// </eventsSet>
// </item>
// <item>
// <instanceId>i-0598c7d356eba48d7</instanceId>
// <availabilityZone>us-east-1d</availabilityZone>
// <instanceState>
// <code>16</code>
// <name>running</name>
// </instanceState>
// <systemStatus>
// <status>ok</status>
// <details>
// <item>
// <name>reachability</name>
// <status>passed</status>
// </item>
// </details>
// </systemStatus>
// <instanceStatus>
// <status>ok</status>
// <details>
// <item>
// <name>reachability</name>
// <status>passed</status>
// </item>
// </details>
// </instanceStatus>
// <eventsSet>
// <item>
// <code>instance-reboot</code>
// <description>The instance is scheduled for a reboot</description>
// <notBefore>YYYY-MM-DDTHH:MM:SS+0000</notBefore>
// <notAfter>YYYY-MM-DDTHH:MM:SS+0000</notAfter>
// </item>
// </eventsSet>
// </item>
// <item>
// <instanceId>i-0987654321abcdef0</instanceId>
// <availabilityZone>us-east-1d</availabilityZone>
// <instanceState>
// <code>16</code>
// <name>running</name>
// </instanceState>
// <systemStatus>
// <status>ok</status>
// <details>
// <item>
// <name>reachability</name>
// <status>passed</status>
// </item>
// </details>
// </systemStatus>
// <instanceStatus>
// <status>ok</status>
// <details>
// <item>
// <name>reachability</name>
// <status>passed</status>
// </item>
// </details>
// </instanceStatus>
// </item>
// <item>
// <instanceId>i-0598c7d356eba48d8</instanceId>
// <availabilityZone>us-east-1d</availabilityZone>
// <instanceState>
// <code>16</code>
// <name>running</name>
// </instanceState>
// <systemStatus>
// <status>ok</status>
// <details>
// <item>
// <name>reachability</name>
// <status>passed</status>
// </item>
// </details>
// </systemStatus>
// <instanceStatus>
// <status>insufficient-data</status>
// <details>
// <item>
// <name>reachability</name>
// <status>insufficient-data</status>
// </item>
// </details>
// </instanceStatus>
// </item>
// </instanceStatusSet>
// </DescribeInstanceStatusResponse>
}