/*
* Copyright 2013 Cloud4SOA, www.cloud4soa.eu
*
* 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 cloudbees;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import javax.net.ssl.HttpsURLConnection;
/**
*
* @author Ledakis Giannis (SingularLogic)
*/
public class ApiClient
{
protected String format = "xml";
private String serverApiUrl = "https://api.cloudbees.com/api";
private String api_key;
private String secret;
private String version = "1.0";
private String sigVersion = "1";
public ApiClient(String serverApiUrl, String apikey, String secret,
String format, String version)
{
if (serverApiUrl != null) {
this.serverApiUrl = serverApiUrl;
}
if (apikey != null) {
this.api_key = apikey;
}
if (secret != null) {
this.secret = secret;
}
if (format != null) {
this.format = format;
}
if (version != null) {
this.version = version;
}
}
public String getRequestURL(String method,
Map<String, String> methodParams) throws Exception
{
return getRequestURL(method, methodParams, true);
}
public String getRequestURL(String method,
Map<String, String> methodParams, boolean asActionParam) throws Exception
{
HashMap<String, String> urlParams = getDefaultParameters();
StringBuilder requestURL = getApiUrl(asActionParam ? null : method);
requestURL.append("?");
for (Map.Entry<String, String> entry : methodParams.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
urlParams.put(key, value);
}
if (asActionParam)
urlParams.put("action", method);
String signature = calculateSignature(urlParams);
Iterator<Map.Entry<String, String>> it =
urlParams.entrySet().iterator();
for (int i = 0; it.hasNext(); i++) {
Map.Entry<String, String> entry = it.next();
String key = entry.getKey();
String value = entry.getValue();
if (i > 0)
requestURL.append("&");
requestURL.append(URLEncoder.encode(key, "UTF-8"));
requestURL.append("=");
if(value != null){
requestURL.append(URLEncoder.encode(value, "UTF-8"));
}
}
requestURL.append("&");
requestURL.append("sig");
requestURL.append("=");
requestURL.append(signature);
return requestURL.toString();
}
private String calculateSignature(Map<String, String> entries) throws Exception
{
StringBuilder sigData = new StringBuilder();
ArrayList<Map.Entry<String, String>> sortedParams =
new ArrayList<Map.Entry<String, String>>(entries.entrySet());
Collections.sort(sortedParams,
new Comparator<Map.Entry<String, String>>()
{
public int compare(Entry<String, String> e1,
Entry<String, String> e2)
{
return e1.getKey().compareTo(e2.getKey());
}
});
for (Map.Entry<String, String> entry : sortedParams) {
String key = entry.getKey();
String value = entry.getValue();
sigData.append(key);
if(value != null)
sigData.append(value);
}
// append the signature
String signature = getSignature(sigData.toString(), secret);
return signature;
}
protected StringBuilder getApiUrl(String method)
{
StringBuilder requestURL = new StringBuilder();
requestURL.append(serverApiUrl);
if (method != null) {
requestURL.append("/");
requestURL.append(method);
}
return requestURL;
}
private HashMap<String, String> getDefaultParameters()
{
HashMap<String, String> urlParams = new HashMap<String, String>();
urlParams.put("format", format);
urlParams.put("v", version);
urlParams.put("api_key", api_key);
urlParams.put("timestamp",
new Long(System.currentTimeMillis() / 1000).toString());
urlParams.put("sig_version", sigVersion);
return urlParams;
}
public static String getSignature(String data, String secret) throws Exception
{
String s = data + secret;
String sig = md5(s);
return sig;
}
public static String md5(String message)
{
try {
MessageDigest md5 = MessageDigest.getInstance("MD5");
byte[] md5Bytes = md5.digest(message.getBytes("CP1252"));
StringBuffer hex = new StringBuffer();
for (int i = 0; i < md5Bytes.length; ++i) {
hex.append(Integer.toHexString((md5Bytes[i] & 0xFF) | 0x100)
.substring(1, 3));
}
return hex.toString();
} catch (NoSuchAlgorithmException e) {
} catch (UnsupportedEncodingException e) {
}
return null;
}
public String executeRequest(String url, String postBody) throws Exception
{
StringBuffer response = new StringBuffer();
URL myurl = new URL(url);
HttpURLConnection con;
if (myurl.getProtocol().equals("https")) {
con = (HttpsURLConnection)myurl.openConnection();
} else {
con = (HttpURLConnection)myurl.openConnection();
}
if (postBody != null) {
con.setDoOutput(true);
OutputStream out = con.getOutputStream();
out.write(postBody.getBytes("utf-8"));
out.close();
}
InputStream ins = null;
try {
ins = con.getInputStream();
addStreamToBuffer(response, ins);
} catch (IOException e) {
if (ins == null && con.getResponseCode() != 200) {
ins = con.getErrorStream();
addStreamToBuffer(response, ins);
}
} finally {
if (ins != null)
ins.close();
}
return response.toString();
}
private void addStreamToBuffer(StringBuffer response, InputStream ins) throws IOException
{
InputStreamReader isr = new InputStreamReader(ins);
char[] chars = new char[1024];
int numRead = isr.read(chars, 0, chars.length);
while (numRead != -1) {
response.append(new String(chars, 0, numRead));
numRead = isr.read(chars, 0, chars.length);
}
}
}