Java tutorial
/******************************************************************************* * This file is part of RedReader. * * RedReader 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 3 of the License, or * (at your option) any later version. * * RedReader 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 RedReader. If not, see <http://www.gnu.org/licenses/>. ******************************************************************************/ package org.lol.reddit.account; import android.content.Context; import android.util.Log; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.StatusLine; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.params.ClientPNames; import org.apache.http.client.protocol.ClientContext; import org.apache.http.message.BasicNameValuePair; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.CoreConnectionPNames; import org.apache.http.params.CoreProtocolPNames; import org.apache.http.params.HttpParams; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HTTP; import org.apache.http.protocol.HttpContext; import org.lol.reddit.cache.PersistentCookieStore; import org.lol.reddit.common.Constants; import org.lol.reddit.jsonwrap.JsonBufferedArray; import org.lol.reddit.jsonwrap.JsonBufferedObject; import org.lol.reddit.jsonwrap.JsonValue; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.ArrayList; public class RedditAccount { public static enum LoginResult { SUCCESS, INTERNAL_ERROR, CONNECTION_ERROR, REQUEST_ERROR, JSON_ERROR, WRONG_PASSWORD, UNKNOWN_REDDIT_ERROR, RATELIMIT } public static class LoginResultPair { public final LoginResult result; public final RedditAccount account; public final String extraMessage; public LoginResultPair(final LoginResult result) { this(result, null, null); } public LoginResultPair(final LoginResult result, String extraMessage) { this(result, null, extraMessage); } public LoginResultPair(final LoginResult result, final RedditAccount account, final String extraMessage) { this.result = result; this.account = account; this.extraMessage = extraMessage; } } public final String username, modhash; private final PersistentCookieStore cookies; public final long priority; public RedditAccount(final String username, final String modhash, final PersistentCookieStore cookies, final long priority) { if (username == null) throw new RuntimeException("Null user in RedditAccount"); this.username = username.trim(); this.modhash = modhash; this.cookies = cookies; this.priority = priority; } public boolean isAnonymous() { return username.length() == 0; } public String getCanonicalUsername() { return username.toLowerCase().trim(); } public static LoginResultPair login(final Context context, final String username, final String password, final HttpClient client) { final ArrayList<NameValuePair> fields = new ArrayList<NameValuePair>(3); fields.add(new BasicNameValuePair("user", username)); fields.add(new BasicNameValuePair("passwd", password)); fields.add(new BasicNameValuePair("api_type", "json")); // TODO put somewhere else final HttpParams params = new BasicHttpParams(); params.setParameter(CoreProtocolPNames.USER_AGENT, Constants.ua(context)); params.setParameter(CoreConnectionPNames.SO_TIMEOUT, 20000); // TODO remove hardcoded params, put in network prefs params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 20000); params.setParameter(CoreConnectionPNames.MAX_HEADER_COUNT, 100); params.setParameter(ClientPNames.HANDLE_REDIRECTS, true); params.setParameter(ClientPNames.MAX_REDIRECTS, 5); final HttpPost request = new HttpPost("https://ssl.reddit.com/api/login"); request.setParams(params); try { request.setEntity(new UrlEncodedFormEntity(fields, HTTP.UTF_8)); } catch (UnsupportedEncodingException e) { return new LoginResultPair(LoginResult.INTERNAL_ERROR); } final PersistentCookieStore cookies = new PersistentCookieStore(); final HttpContext localContext = new BasicHttpContext(); localContext.setAttribute(ClientContext.COOKIE_STORE, cookies); final StatusLine status; final HttpEntity entity; try { final HttpResponse response = client.execute(request, localContext); status = response.getStatusLine(); entity = response.getEntity(); } catch (IOException e) { return new LoginResultPair(LoginResult.CONNECTION_ERROR); } if (status.getStatusCode() != 200) { return new LoginResultPair(LoginResult.REQUEST_ERROR); } final JsonValue result; try { result = new JsonValue(entity.getContent()); result.buildInThisThread(); } catch (IOException e) { return new LoginResultPair(LoginResult.CONNECTION_ERROR); } final String modhash; try { // TODO use the more general reddit error finder final JsonBufferedArray errors = result.asObject().getObject("json").getArray("errors"); errors.join(); if (errors.getCurrentItemCount() != 0) { for (final JsonValue v : errors) { for (final JsonValue s : v.asArray()) { // TODO handle unknown messages by concatenating all Reddit's strings if (s.getType() == JsonValue.Type.STRING) { Log.i("RR DEBUG ERROR", s.asString()); // lol, reddit api if (s.asString().equalsIgnoreCase("WRONG_PASSWORD") || s.asString().equalsIgnoreCase("invalid password") || s.asString().equalsIgnoreCase("passwd")) return new LoginResultPair(LoginResult.WRONG_PASSWORD); if (s.asString().contains("too much")) // also "RATELIMIT", but that's not as descriptive return new LoginResultPair(LoginResult.RATELIMIT, s.asString()); } } } return new LoginResultPair(LoginResult.UNKNOWN_REDDIT_ERROR); } final JsonBufferedObject data = result.asObject().getObject("json").getObject("data"); modhash = data.getString("modhash"); } catch (NullPointerException e) { return new LoginResultPair(LoginResult.JSON_ERROR); } catch (InterruptedException e) { return new LoginResultPair(LoginResult.JSON_ERROR); } catch (IOException e) { return new LoginResultPair(LoginResult.JSON_ERROR); } return new LoginResultPair(LoginResult.SUCCESS, new RedditAccount(username, modhash, cookies, 0), null); } public PersistentCookieStore getCookies() { if (cookies == null) return null; return new PersistentCookieStore(cookies); } public byte[] getCookieBytes() { if (cookies == null) return null; return cookies.toByteArray(); } @Override public boolean equals(final Object o) { return o instanceof RedditAccount && username.equals(((RedditAccount) o).username); } }