Java tutorial
/* * Copyright 2010 Google 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.prestomation.android.androidfiledrop; import java.io.IOException; import java.net.URI; import java.net.URLEncoder; import java.util.List; import org.apache.http.Header; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.params.HttpClientParams; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpParams; import android.accounts.Account; import android.accounts.AccountManager; import android.accounts.AccountManagerFuture; import android.accounts.AuthenticatorException; import android.accounts.OperationCanceledException; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.util.Log; /** * AppEngine client. Handles auth. */ public class AppEngineClient { private static final String TAG = "AppEngineClient"; static final String BASE_URL = "https://androidfiledrop.appspot.com"; private static final String AUTH_URL = BASE_URL + "/_ah/login"; private static final String AUTH_TOKEN_TYPE = "ah"; private final Context mContext; private final String mAccountName; public AppEngineClient(Context context, String accountName) { this.mContext = context; this.mAccountName = accountName; } public HttpResponse makeRequest(String urlPath, List<NameValuePair> params) throws Exception { HttpResponse res = makeRequestNoRetry(urlPath, params); /* * if (res.getStatusLine().getStatusCode() == 500) { res = * makeRequestNoRetry(urlPath, params, true); } */ return res; } private HttpResponse makeRequestNoRetry(String urlPath, List<NameValuePair> params) throws Exception { // Get auth token for account /* * Account account = new Account(mAccountName, "com.google"); String * authToken = getAuthToken(mContext, account); if (authToken == null) * throw new PendingAuthException(mAccountName); if (newToken) { // * invalidate the cached token AccountManager accountManager = * AccountManager.get(mContext); * accountManager.invalidateAuthToken(account.type, authToken); * authToken = getAuthToken(mContext, account); } * * // Get ACSID cookie DefaultHttpClient client = new * DefaultHttpClient(); String continueURL = BASE_URL; URI uri = new * URI(AUTH_URL + "?continue=" + URLEncoder.encode(continueURL, "UTF-8") * + "&auth=" + authToken); HttpGet method = new HttpGet(uri); final * HttpParams getParams = new BasicHttpParams(); * HttpClientParams.setRedirecting(getParams, false); // continue is not * used method.setParams(getParams); * * HttpResponse res = client.execute(method); Header[] headers = * res.getHeaders("Set-Cookie"); if (res.getStatusLine().getStatusCode() * != 302 || headers.length == 0) { return res; } * * String ascidCookie = null; for (Header header: headers) { if * (header.getValue().indexOf("ACSID=") >=0) { // let's parse it String * value = header.getValue(); String[] pairs = value.split(";"); * ascidCookie = pairs[0]; } } */ String ascidCookie = getASCIDCookie(true); // Make POST request DefaultHttpClient client = new DefaultHttpClient(); URI uri = new URI(BASE_URL + urlPath); HttpPost post = new HttpPost(uri); UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params, "UTF-8"); post.setEntity(entity); post.setHeader("Cookie", ascidCookie); post.setHeader("X-Same-Domain", "1"); // XSRF HttpResponse res = client.execute(post); return res; } public String getASCIDCookie(boolean https) throws Exception { // Get auth token for account Account account = new Account(mAccountName, "com.google"); String authToken = getAuthToken(mContext, account); if (authToken == null) { throw new PendingAuthException(mAccountName); } AccountManager accountManager = AccountManager.get(mContext); accountManager.invalidateAuthToken(account.type, authToken); authToken = getAuthToken(mContext, account); // Get ACSID cookie DefaultHttpClient client = new DefaultHttpClient(); String continueURL = BASE_URL; String sURI = AUTH_URL + "?continue=" + URLEncoder.encode(continueURL, "UTF-8") + "&auth=" + authToken; if (https == false) { sURI = sURI.replace("https", "http"); } URI uri = new URI(sURI); HttpGet method = new HttpGet(uri); final HttpParams getParams = new BasicHttpParams(); HttpClientParams.setRedirecting(getParams, false); // continue is not // used method.setParams(getParams); HttpResponse res = client.execute(method); Header[] headers = res.getHeaders("Set-Cookie"); if (res.getStatusLine().getStatusCode() != 302 || headers.length == 0) { return res.toString(); } String ascidCookie = null; for (Header header : headers) { if (header.getValue().indexOf("ACSID=") >= 0) { // let's parse it String value = header.getValue(); String[] pairs = value.split(";"); ascidCookie = pairs[0]; } } Log.i("AndroidFileDrop", "Received ASCIDCookie: " + ascidCookie); return ascidCookie; } private String getAuthToken(Context context, Account account) { String authToken = null; AccountManager accountManager = AccountManager.get(context); try { AccountManagerFuture<Bundle> future = accountManager.getAuthToken(account, AUTH_TOKEN_TYPE, false, null, null); Bundle bundle = future.getResult(); authToken = bundle.getString(AccountManager.KEY_AUTHTOKEN); // User will be asked for "App Engine" permission. if (authToken == null) { // No auth token - will need to ask permission from user. Intent intent = new Intent(SetupActivity.AUTH_PERMISSION_ACTION); intent.putExtra("AccountManagerBundle", bundle); context.sendBroadcast(intent); } } catch (OperationCanceledException e) { Log.w(TAG, e.getMessage()); } catch (AuthenticatorException e) { Log.w(TAG, e.getMessage()); } catch (IOException e) { Log.w(TAG, e.getMessage()); } return authToken; } public class PendingAuthException extends Exception { private static final long serialVersionUID = 1L; public PendingAuthException(String message) { super(message); } } }