protected String rootUrl = "http://localhost:8080/client/api";

protected String sessionKey = null;

protected String cookieToSent = null;

/**

protected String sendRequest(String command, HashMap<String, String> params) {

try {

// Construct query string

StringBuilder sBuilder = new StringBuilder();

sBuilder.append("command=");

sBuilder.append(command);

if (params != null && params.size() > 0) {

Iterator<String> keys = params.keySet().iterator();

while (keys.hasNext()) {

String key = keys.next();

sBuilder.append("&");

sBuilder.append(key);

sBuilder.append("=");

sBuilder.append(URLEncoder.encode(params.get(key), "UTF-8"));

}

}

// Construct request url

String reqUrl = rootUrl + "?" + sBuilder.toString();

// Send Http GET request

URL url = new URL(reqUrl);

HttpURLConnection conn = (HttpURLConnection)url.openConnection();

conn.setRequestMethod("GET");

if (!command.equals("login") && cookieToSent != null) {

// add the cookie to a request

conn.setRequestProperty("Cookie", cookieToSent);

}

conn.connect();

if (command.equals("login")) {

// if it is login call, store cookie

String headerName = null;

for (int i = 1; (headerName = conn.getHeaderFieldKey(i)) != null; i++) {

if (headerName.equals("Set-Cookie")) {

String cookie = conn.getHeaderField(i);

cookie = cookie.substring(0, cookie.indexOf(";"));

String cookieName = cookie.substring(0, cookie.indexOf("="));

String cookieValue = cookie.substring(cookie.indexOf("=") + 1, cookie.length());

cookieToSent = cookieName + "=" + cookieValue;

}

}

}

// Get the response

StringBuilder response = new StringBuilder();

BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));

String line;

try {

while ((line = rd.readLine()) != null) {

response.append(line);

}

} catch (EOFException ex) {

// ignore this exception

System.out.println("EOF exception due to java bug");

}

rd.close();

return response.toString();

} catch (Exception e) {

throw new CloudRuntimeException("Problem with sending api request", e);

}

}

protected String createMD5String(String password) {

MessageDigest md5;

try {

md5 = MessageDigest.getInstance("MD5");

} catch (NoSuchAlgorithmException e) {

throw new CloudRuntimeException("Error", e);

}

md5.reset();

BigInteger pwInt = new BigInteger(1, md5.digest(password.getBytes()));

// make sure our MD5 hash value is 32 digits long...

StringBuffer sb = new StringBuffer();

String pwStr = pwInt.toString(16);

int padding = 32 - pwStr.length();

for (int i = 0; i < padding; i++) {

sb.append('0');

}

sb.append(pwStr);

return sb.toString();

}

protected Object fromSerializedString(String result, Class<?> repCls) {

try {

if (result != null && !result.isEmpty()) {

// get real content

int start;

int end;

if (repCls == LoginResponse.class || repCls == SuccessResponse.class) {

start = result.indexOf('{', result.indexOf('{') + 1); // find

// the

// second

// {

end = result.lastIndexOf('}', result.lastIndexOf('}') - 1); // find

// the

// second

// }

// backwards

} else {

// get real content

start = result.indexOf('{', result.indexOf('{', result.indexOf('{') + 1) + 1); // find

// the

// third

// {

end = result.lastIndexOf('}', result.lastIndexOf('}', result.lastIndexOf('}') - 1) - 1); // find

// the

// third

// }

// backwards

}

if (start < 0 || end < 0) {

throw new CloudRuntimeException("Response format is wrong: " + result);

}

String content = result.substring(start, end + 1);

Gson gson = ApiGsonHelper.getBuilder().create();

return gson.fromJson(content, repCls);

}

return null;

} catch (RuntimeException e) {

throw new CloudRuntimeException("Caught runtime exception when doing GSON deserialization on: " + result, e);

}

}

/**

protected void login(String username, String password) {

// send login request

HashMap<String, String> params = new HashMap<String, String>();

params.put("response", "json");

params.put("username", username);

params.put("password", password);

String result = this.sendRequest("login", params);

LoginResponse loginResp = (LoginResponse)fromSerializedString(result, LoginResponse.class);

sessionKey = loginResp.getSessionkey();

}