Java tutorial
/* Copyright (C) 2012 Haowen Ning This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ package org.liberty.android.fantastischmemo.downloader.google; import java.io.IOException; import java.io.OutputStreamWriter; import java.net.URL; import java.util.ArrayList; import java.util.List; import javax.net.ssl.HttpsURLConnection; import org.apache.commons.io.IOUtils; import org.xmlpull.v1.XmlPullParserException; import com.google.common.xml.XmlEscapers; public class FolderFactory { private FolderFactory() { throw new AssertionError("Don't call constructor"); } public static List<Folder> getFolderWithTitle(String title, String authToken) throws XmlPullParserException, IOException { List<Folder> resFolders = new ArrayList<Folder>(); List<Folder> allFolders = getFolders(authToken); for (Folder f : allFolders) { if (f.getTitle().equals(title)) { resFolders.add(f); } } return resFolders; } public static List<Folder> getFolders(String authToken) throws XmlPullParserException, IOException { URL url = new URL("https://docs.google.com/feeds/default/private/full/-/folder?access_token=" + authToken); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.addRequestProperty("GData-Version", "3.0"); conn.addRequestProperty("If-Match", "*"); if (conn.getResponseCode() / 100 >= 3) { String s = new String(IOUtils.toByteArray(conn.getErrorStream())); throw new IOException(s); } List<Folder> folderList = EntryFactory.getEntries(Folder.class, conn.getInputStream()); return folderList; } public static Folder createOrReturnFolder(String title, String authToken) throws XmlPullParserException, IOException { List<Folder> existingFolders = getFolderWithTitle(title, authToken); if (existingFolders.size() > 0) { return existingFolders.get(0); } return createFolder(title, authToken); } public static Folder createFolder(String title, String authToken) throws XmlPullParserException, IOException { URL url = new URL("https://docs.google.com/feeds/default/private/full?access_token=" + authToken); String payload = "<?xml version='1.0' encoding='UTF-8'?>" + "<entry xmlns='http://www.w3.org/2005/Atom'>" + "<category scheme='http://schemas.google.com/g/2005#kind'" + " term='http://schemas.google.com/docs/2007#folder'/>" + "<title>" + XmlEscapers.xmlAttributeEscaper().escape(title) + "</title>" + "</entry>"; HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); //conn.addRequestProperty("Authorization", "GoogleLogin auth=" + authToken); conn.addRequestProperty("GData-Version", "3.0"); conn.addRequestProperty("Content-Type", "application/atom+xml"); conn.setRequestProperty("Content-Length", Integer.toString(payload.getBytes("UTF-8").length)); OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream()); out.write(payload); out.close(); if (conn.getResponseCode() / 100 >= 3) { String s = new String(IOUtils.toByteArray(conn.getErrorStream())); throw new RuntimeException(s); } List<Folder> folderList = EntryFactory.getEntries(Folder.class, conn.getInputStream()); return folderList.get(0); } public static void addDocumentToFolder(Document document, Folder folder, String authToken) throws XmlPullParserException, IOException { URL url = new URL("https://docs.google.com/feeds/default/private/full/" + folder.getId() + "/contents?access_token=" + authToken); String payload = "<?xml version='1.0' encoding='UTF-8'?>" + "<entry xmlns='http://www.w3.org/2005/Atom'>" + "<id>" + XmlEscapers.xmlAttributeEscaper() .escape("https://docs.google.com/feeds/default/private/full/" + document.getId()) + "</id>" + "</entry>"; HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); //conn.addRequestProperty("Authorization", "GoogleLogin auth=" + authToken); conn.addRequestProperty("GData-Version", "3.0"); conn.addRequestProperty("Content-Type", "application/atom+xml"); conn.setRequestProperty("Content-Length", Integer.toString(payload.getBytes("UTF-8").length)); OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream()); out.write(payload); out.close(); if (conn.getResponseCode() / 100 >= 3) { String s = new String(IOUtils.toByteArray(conn.getErrorStream())); throw new RuntimeException(s); } } }