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IAMExample.java
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/**
* Copyright 2012-2018 The Feign Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package feign.sax.examples;
import org.xml.sax.helpers.DefaultHandler;
import feign.Feign;
import feign.Request;
import feign.RequestLine;
import feign.RequestTemplate;
import feign.Target;
import feign.sax.SAXDecoder;
public class IAMExample {
public static void main(String... args) {
IAM iam = Feign.builder()//
.decoder(SAXDecoder.builder().registerContentHandler(UserIdHandler.class).build())//
.target(new IAMTarget(args[0], args[1]));
System.out.println(iam.userId());
}
interface IAM {
@RequestLine("GET /?Action=GetUser&Version=2010-05-08")
Long userId();
}
static class IAMTarget extends AWSSignatureVersion4 implements Target<IAM> {
private IAMTarget(String accessKey, String secretKey) {
super(accessKey, secretKey);
}
@Override
public Class<IAM> type() {
return IAM.class;
}
@Override
public String name() {
return "iam";
}
@Override
public String url() {
return "https://iam.amazonaws.com";
}
@Override
public Request apply(RequestTemplate in) {
in.insert(0, url());
return super.apply(in);
}
}
static class UserIdHandler extends DefaultHandler
implements SAXDecoder.ContentHandlerWithResult<Long> {
private StringBuilder currentText = new StringBuilder();
private Long userId;
@Override
public Long result() {
return userId;
}
@Override
public void endElement(String uri, String name, String qName) {
if (qName.equals("UserId")) {
this.userId = Long.parseLong(currentText.toString().trim());
}
currentText = new StringBuilder();
}
@Override
public void characters(char ch[], int start, int length) {
currentText.append(ch, start, length);
}
}
}