chris@1: /*
chris@1: * SONEWS News Server
chris@1: * see AUTHORS for the list of contributors
chris@1: *
chris@1: * This program is free software: you can redistribute it and/or modify
chris@1: * it under the terms of the GNU General Public License as published by
chris@1: * the Free Software Foundation, either version 3 of the License, or
chris@1: * (at your option) any later version.
chris@1: *
chris@1: * This program is distributed in the hope that it will be useful,
chris@1: * but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@1: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
chris@1: * GNU General Public License for more details.
chris@1: *
chris@1: * You should have received a copy of the GNU General Public License
chris@1: * along with this program. If not, see .
chris@1: */
chris@1: package org.sonews.daemon.command;
chris@1:
chris@1: import java.io.IOException;
chris@1: import java.io.ByteArrayInputStream;
chris@3: import java.io.ByteArrayOutputStream;
chris@1: import java.sql.SQLException;
chris@3: import java.util.Arrays;
cli@50: import java.util.logging.Level;
chris@1: import javax.mail.MessagingException;
chris@1: import javax.mail.internet.AddressException;
chris@1: import javax.mail.internet.InternetHeaders;
chris@3: import org.sonews.config.Config;
chris@1: import org.sonews.util.Log;
chris@1: import org.sonews.mlgw.Dispatcher;
chris@3: import org.sonews.storage.Article;
chris@3: import org.sonews.storage.Group;
chris@1: import org.sonews.daemon.NNTPConnection;
chris@3: import org.sonews.storage.Headers;
chris@3: import org.sonews.storage.StorageBackendException;
chris@3: import org.sonews.storage.StorageManager;
chris@1: import org.sonews.feed.FeedManager;
chris@1: import org.sonews.util.Stats;
chris@1:
chris@1: /**
chris@1: * Implementation of the POST command. This command requires multiple lines
chris@1: * from the client, so the handling of asynchronous reading is a little tricky
chris@1: * to handle.
chris@1: * @author Christian Lins
chris@1: * @since sonews/0.5.0
chris@1: */
cli@42: public class PostCommand implements Command {
chris@3:
cli@37: private final Article article = new Article();
cli@37: private int lineCount = 0;
cli@37: private long bodySize = 0;
cli@37: private InternetHeaders headers = null;
cli@37: private long maxBodySize =
cli@42: Config.inst().get(Config.ARTICLE_MAXSIZE, 128) * 1024L; // Size in bytes
cli@37: private PostState state = PostState.WaitForLineOne;
cli@37: private final ByteArrayOutputStream bufBody = new ByteArrayOutputStream();
cli@37: private final StringBuilder strHead = new StringBuilder();
chris@1:
cli@37: @Override
cli@42: public String[] getSupportedCommandStrings() {
cli@42: return new String[]{"POST"};
cli@37: }
chris@1:
cli@37: @Override
cli@42: public boolean hasFinished() {
cli@37: return this.state == PostState.Finished;
cli@37: }
cli@20:
cli@37: @Override
cli@42: public String impliedCapability() {
cli@37: return null;
cli@37: }
chris@3:
cli@37: @Override
cli@42: public boolean isStateful() {
cli@37: return true;
cli@37: }
chris@1:
cli@37: /**
cli@37: * Process the given line String. line.trim() was called by NNTPConnection.
cli@37: * @param line
cli@37: * @throws java.io.IOException
cli@37: * @throws java.sql.SQLException
cli@37: */
cli@37: @Override // TODO: Refactor this method to reduce complexity!
cli@37: public void processLine(NNTPConnection conn, String line, byte[] raw)
cli@42: throws IOException, StorageBackendException {
cli@37: switch (state) {
cli@37: case WaitForLineOne: {
cli@37: if (line.equalsIgnoreCase("POST")) {
cli@37: conn.println("340 send article to be posted. End with .");
cli@37: state = PostState.ReadingHeaders;
cli@37: } else {
cli@37: conn.println("500 invalid command usage");
cli@37: }
cli@37: break;
cli@37: }
cli@37: case ReadingHeaders: {
cli@37: strHead.append(line);
cli@37: strHead.append(NNTPConnection.NEWLINE);
chris@1:
cli@37: if ("".equals(line) || ".".equals(line)) {
cli@37: // we finally met the blank line
cli@37: // separating headers from body
chris@3:
cli@37: try {
cli@37: // Parse the header using the InternetHeader class from JavaMail API
cli@37: headers = new InternetHeaders(
cli@42: new ByteArrayInputStream(strHead.toString().trim().getBytes(conn.getCurrentCharset())));
cli@18:
cli@37: // add the header entries for the article
cli@37: article.setHeaders(headers);
cli@50: } catch (MessagingException ex) {
cli@50: Log.get().log(Level.INFO, ex.getLocalizedMessage(), ex);
cli@37: conn.println("500 posting failed - invalid header");
cli@37: state = PostState.Finished;
cli@37: break;
cli@37: }
chris@1:
cli@37: // Change charset for reading body;
cli@37: // for multipart messages UTF-8 is returned
cli@37: //conn.setCurrentCharset(article.getBodyCharset());
chris@1:
cli@37: state = PostState.ReadingBody;
chris@1:
cli@37: if (".".equals(line)) {
cli@37: // Post an article without body
cli@37: postArticle(conn, article);
cli@37: state = PostState.Finished;
cli@37: }
cli@37: }
cli@37: break;
cli@37: }
cli@37: case ReadingBody: {
cli@37: if (".".equals(line)) {
cli@37: // Set some headers needed for Over command
cli@37: headers.setHeader(Headers.LINES, Integer.toString(lineCount));
cli@37: headers.setHeader(Headers.BYTES, Long.toString(bodySize));
cli@37:
cli@37: byte[] body = bufBody.toByteArray();
cli@37: if (body.length >= 2) {
cli@37: // Remove trailing CRLF
cli@37: body = Arrays.copyOf(body, body.length - 2);
cli@37: }
cli@37: article.setBody(body); // set the article body
cli@37:
cli@37: postArticle(conn, article);
cli@37: state = PostState.Finished;
cli@37: } else {
cli@37: bodySize += line.length() + 1;
cli@37: lineCount++;
cli@37:
cli@37: // Add line to body buffer
cli@37: bufBody.write(raw, 0, raw.length);
cli@37: bufBody.write(NNTPConnection.NEWLINE.getBytes());
cli@37:
cli@37: if (bodySize > maxBodySize) {
cli@37: conn.println("500 article is too long");
cli@37: state = PostState.Finished;
cli@37: break;
cli@37: }
cli@37: }
cli@37: break;
cli@37: }
cli@37: default: {
cli@37: // Should never happen
cli@37: Log.get().severe("PostCommand::processLine(): already finished...");
cli@37: }
cli@37: }
cli@37: }
cli@37:
cli@37: /**
cli@37: * Article is a control message and needs special handling.
cli@37: * @param article
cli@37: */
cli@37: private void controlMessage(NNTPConnection conn, Article article)
cli@42: throws IOException {
cli@37: String[] ctrl = article.getHeader(Headers.CONTROL)[0].split(" ");
cli@37: if (ctrl.length == 2) // "cancel "
cli@37: {
cli@37: try {
cli@37: StorageManager.current().delete(ctrl[1]);
cli@37:
cli@37: // Move cancel message to "control" group
cli@37: article.setHeader(Headers.NEWSGROUPS, "control");
cli@37: StorageManager.current().addArticle(article);
cli@37: conn.println("240 article cancelled");
cli@37: } catch (StorageBackendException ex) {
cli@37: Log.get().severe(ex.toString());
cli@37: conn.println("500 internal server error");
cli@37: }
cli@37: } else {
cli@37: conn.println("441 unknown control header");
cli@37: }
cli@37: }
cli@37:
cli@37: private void supersedeMessage(NNTPConnection conn, Article article)
cli@42: throws IOException {
cli@37: try {
cli@37: String oldMsg = article.getHeader(Headers.SUPERSEDES)[0];
cli@37: StorageManager.current().delete(oldMsg);
cli@37: StorageManager.current().addArticle(article);
cli@37: conn.println("240 article replaced");
cli@37: } catch (StorageBackendException ex) {
cli@37: Log.get().severe(ex.toString());
cli@37: conn.println("500 internal server error");
cli@37: }
cli@37: }
cli@37:
cli@37: private void postArticle(NNTPConnection conn, Article article)
cli@42: throws IOException {
franta-hg@101: if (conn.isUserAuthenticated()) {
franta-hg@101: article.setAuthenticatedUser(conn.getUsername());
franta-hg@101: }
franta-hg@101:
cli@37: if (article.getHeader(Headers.CONTROL)[0].length() > 0) {
cli@37: controlMessage(conn, article);
cli@37: } else if (article.getHeader(Headers.SUPERSEDES)[0].length() > 0) {
cli@37: supersedeMessage(conn, article);
cli@50: } else { // Post the article regularily
cli@37: // Circle check; note that Path can already contain the hostname here
cli@37: String host = Config.inst().get(Config.HOSTNAME, "localhost");
cli@37: if (article.getHeader(Headers.PATH)[0].indexOf(host + "!", 1) > 0) {
franta-hg@101: Log.get().log(Level.INFO, "{0} skipped for host {1}", new Object[]{article.getMessageID(), host});
cli@37: conn.println("441 I know this article already");
cli@37: return;
cli@37: }
cli@37:
cli@37: // Try to create the article in the database or post it to
cli@37: // appropriate mailing list
cli@37: try {
cli@37: boolean success = false;
cli@37: String[] groupnames = article.getHeader(Headers.NEWSGROUPS)[0].split(",");
cli@37: for (String groupname : groupnames) {
cli@37: Group group = StorageManager.current().getGroup(groupname);
cli@37: if (group != null && !group.isDeleted()) {
cli@37: if (group.isMailingList() && !conn.isLocalConnection()) {
cli@37: // Send to mailing list; the Dispatcher writes
cli@37: // statistics to database
cli@50: success = Dispatcher.toList(article, group.getName());
cli@37: } else {
cli@37: // Store in database
cli@37: if (!StorageManager.current().isArticleExisting(article.getMessageID())) {
cli@37: StorageManager.current().addArticle(article);
cli@37:
cli@37: // Log this posting to statistics
cli@37: Stats.getInstance().mailPosted(
cli@42: article.getHeader(Headers.NEWSGROUPS)[0]);
cli@37: }
cli@37: success = true;
cli@37: }
cli@37: }
cli@37: } // end for
cli@37:
cli@37: if (success) {
cli@37: conn.println("240 article posted ok");
cli@37: FeedManager.queueForPush(article);
cli@37: } else {
cli@50: conn.println("441 newsgroup not found or configuration error");
cli@37: }
cli@37: } catch (AddressException ex) {
cli@37: Log.get().warning(ex.getMessage());
cli@37: conn.println("441 invalid sender address");
cli@37: } catch (MessagingException ex) {
cli@37: // A MessageException is thrown when the sender email address is
cli@37: // invalid or something is wrong with the SMTP server.
cli@37: System.err.println(ex.getLocalizedMessage());
cli@37: conn.println("441 " + ex.getClass().getCanonicalName() + ": " + ex.getLocalizedMessage());
cli@37: } catch (StorageBackendException ex) {
cli@37: ex.printStackTrace();
cli@37: conn.println("500 internal server error");
cli@37: }
cli@37: }
cli@37: }
chris@1: }