Java tutorial
/* * Copyright 2009 Dave Johnson (Blogapps project) * * 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.rometools.propono.atom.client; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpMethodBase; import org.apache.commons.httpclient.NameValuePair; import org.apache.commons.httpclient.methods.PostMethod; import com.rometools.propono.utils.ProponoException; public class GDataAuthStrategy implements AuthStrategy { private final String email; private final String password; private final String service; private String authToken; public GDataAuthStrategy(final String email, final String password, final String service) throws ProponoException { this.email = email; this.password = password; this.service = service; init(); } private void init() throws ProponoException { try { final HttpClient httpClient = new HttpClient(); final PostMethod method = new PostMethod("https://www.google.com/accounts/ClientLogin"); final NameValuePair[] data = { new NameValuePair("Email", email), new NameValuePair("Passwd", password), new NameValuePair("accountType", "GOOGLE"), new NameValuePair("service", service), new NameValuePair("source", "ROME Propono Atompub Client") }; method.setRequestBody(data); httpClient.executeMethod(method); final String responseBody = method.getResponseBodyAsString(); final int authIndex = responseBody.indexOf("Auth="); authToken = "GoogleLogin auth=" + responseBody.trim().substring(authIndex + 5); } catch (final Throwable t) { t.printStackTrace(); throw new ProponoException("ERROR obtaining Google authentication string", t); } } @Override public void addAuthentication(final HttpClient httpClient, final HttpMethodBase method) throws ProponoException { httpClient.getParams().setAuthenticationPreemptive(true); method.setRequestHeader("Authorization", authToken); } }