Java tutorial
/* Copyright 2013 Collaborative For Universal Health (C4UH), Logicoy Inc. 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 com.logicoy.pdmp.pmpi.http; import java.nio.charset.Charset; import java.text.MessageFormat; import java.util.logging.Logger; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; /** * * @author Vishnu */ public class PMPIHttpClient extends BasePMPIHttpClient { private static final Logger log = Logger.getLogger(PMPIHttpClient.class.getName()); private boolean loggedIn = false; public PMPIHttpClient(String base_url, String username, String password, String interconnectid) { super(base_url, username, password, interconnectid); } public boolean doLogin(boolean force) { if (force || !this.sessionObj.inSessionTimeoutWindow() || loggedIn) { if (this.userNameAndPassword == null) { throw new RuntimeException( "Attempting to post to authenticate but the userNameAndPassword have not been set! "); } Charset utf8 = Charset.forName("UTF-8"); String strMessageBody = ""; char checkmark = '\u2713'; //check mark in utf8. Not sure if it is needed. But it was present in the web form. strMessageBody += "utf-8=" + checkmark; strMessageBody += "&user_session[login]=" + userNameAndPassword.getUsername(); strMessageBody += "&user_session[password]=" + userNameAndPassword.getPassword(); //strMessageBody += "&commit=Login"; //this causes failure for the system user now.. String URI = base_url + "/user_sessions"; SimpleWebClient swc = new SimpleWebClient(); PMPIHttpClientResponse resp = swc.sendRequest(this.sessionObj, new SimpleWebClientSettings(URI, SimpleWebClientSettings.ActionType.POST, "application/x-www-form-urlencoded", strMessageBody, "application/xml", false, false, false)); log.info(new MessageFormat("Attempting login for Interconnect ID : {0} user {1} ") .format(this.userNameAndPassword.getInterocnnectid(), this.userNameAndPassword.getUsername())); if (resp != null) { if (resp.getHttpStatusCode() == HttpStatus.SC_OK) { //Request ok, attempt to parse xml. //this.ErrorMessage(currentMethod, "302 Found", swc, resp); log.warning("Server returned OK " + resp.getHttpStatusDesc()); loggedIn = false; return loggedIn; } else if (resp.getHttpStatusCode() == HttpStatus.SC_MOVED_TEMPORARILY) { log.info(" Login expect (302 Found) received " + String.valueOf(resp.getHttpStatusCode()) + " " + resp.getHttpStatusCode() + " indicating that we have successfully logged in and the web server is trying to redirect us to the landing page. "); loggedIn = true; return loggedIn; } else { //this.ErrorMessage(currentMethod, "302 Found", swc, resp); log.warning("Server returned " + resp.getHttpStatusCode() + " " + resp.getHttpStatusDesc()); loggedIn = false; return loggedIn; } } else { log.warning("No Response from Web Server"); loggedIn = false; return loggedIn; } } else // Because we are not forcing a login and our session object has been created we are going to assume { // that we don't need to log in and just return success. // If we needed to really log in then our operation would fail and our method would try to login later. return true; } } public PMPIHttpClientResponse retrievePublicKey(String PMPInterconnectId, boolean retrying) { String URI = base_url + "/hub/v1/pmps/" + PMPInterconnectId + "/key"; SimpleWebClient swc = new SimpleWebClient(); PMPIHttpClientResponse resp = swc.sendRequest(this.sessionObj, new SimpleWebClientSettings(URI, SimpleWebClientSettings.ActionType.GET, "application/xml", "", "application/xml", false, true, true)); if (resp != null) { if (resp.getHttpStatusCode() == HttpStatus.SC_OK) { //Request ok, attempt to parse xml. log.info(" retrieve public key returned (200 OK!) indicating success Data Length Returned : " + resp.getServerResponse().length()); resp.setSuccess(true); } else if (resp.getHttpStatusCode() == HttpStatus.SC_UNAUTHORIZED) { if (!retrying && doLogin(true)) { log.warning("Received Unauthorized as response, login and try again. "); resp = retrievePublicKey(PMPInterconnectId, true); } else { log.warning("Server returned " + resp.getHttpStatusCode() + " " + resp.getHttpStatusDesc()); } } else { log.warning("Server returned " + resp.getHttpStatusCode() + " " + resp.getHttpStatusDesc()); } } else { throw new RuntimeException("No Response from web server "); } return resp; } /// <summary> /// This makes a synchronous report request. As in 0-synchronous-report-retrieval /// </summary> /// <param name="strMessageBody"></param> /// <param name="retrying"></param> /// <returns></returns> public PMPIHttpClientResponse reportRequest(String strMessageBody, boolean retrying) { String URI = base_url + "/hub/v1/search/requests"; log.info(" Sending Report Request to Hub at " + URI); SimpleWebClient swc = new SimpleWebClient(); PMPIHttpClientResponse resp = swc.sendRequest(this.sessionObj, new SimpleWebClientSettings(URI, SimpleWebClientSettings.ActionType.POST, "application/xml", strMessageBody, "application/xml", true, true, false)); //Log cookie info to debug... if (resp != null) { if (resp.getHttpStatusCode() == HttpStatus.SC_OK) { //Request ok, attempt to parse xml. log.info( " report_request got (200 OK) indicating that the service is reachable. DataLength Returned: " + resp.getServerResponse().length()); resp.setSuccess(true); } else if (resp.getHttpStatusCode() == HttpStatus.SC_UNAUTHORIZED) { if (!retrying && doLogin(true)) { log.warning("Received Unauthorized as response, Attempting to login and try again. "); resp = reportRequest(strMessageBody, true); } else { log.warning("Server returned : " + resp.getHttpStatusCode() + " " + resp.getHttpStatusDesc()); } } else { log.warning("Server returned : " + resp.getHttpStatusCode() + " " + resp.getHttpStatusDesc()); } } else { log.warning(" No Response from server. Indicating that the service is unreachable. "); } return resp; } public boolean isLoggedIn() { return loggedIn; } }