| /** |
| * |
| * Copyright 2003-2005 The Apache Software Foundation |
| * |
| * 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 org.apache.geronimo.javamail.store.pop3; |
| |
| import java.io.BufferedReader; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import javax.mail.MessagingException; |
| import javax.mail.Session; |
| |
| import org.apache.geronimo.javamail.store.pop3.response.POP3ResponseFactory; |
| |
| ; |
| |
| /** |
| * Builds a basic response out of the input stream received by the connection. |
| * Performs only two basic functions |
| * <ul> |
| * <li>Extrats the status code</li> |
| * <li>If multi-line response then extract the data as an input stream</li> |
| * </ul> |
| * |
| * @version $Rev$ $Date$ |
| */ |
| |
| public final class POP3ResponseBuilder implements POP3Constants { |
| |
| public static POP3Response buildResponse(Session session, BufferedReader reader, boolean isMultiLineResponse) |
| throws MessagingException { |
| |
| int status = ERR; |
| InputStream data = null; |
| |
| String line; |
| try { |
| line = reader.readLine(); |
| } catch (IOException e) { |
| throw new MessagingException("Error in receving response"); |
| } |
| if (line == null || line.trim().equals("")) { |
| if (session.getDebug()) { |
| session.getDebugOut().println("Empty Response"); |
| } |
| throw new MessagingException("Empty Response"); |
| } |
| if (session.getDebug()) { |
| session.getDebugOut().println("Response From Server " + line); |
| } |
| |
| if (line.startsWith("+OK")) { |
| status = OK; |
| line = removeStatusField(line); |
| if (isMultiLineResponse) { |
| data = getMultiLineResponse(session, reader); |
| } |
| } else if (line.startsWith("-ERR")) { |
| status = ERR; |
| line = removeStatusField(line); |
| } else { |
| throw new MessagingException("Unexpected response: " + line); |
| } |
| |
| return POP3ResponseFactory.getDefaultResponse(status, line, data); |
| } |
| |
| private static String removeStatusField(String line) { |
| return line.substring(line.indexOf(SPACE) + 1); |
| } |
| |
| /** |
| * This could be a multiline response |
| */ |
| private static InputStream getMultiLineResponse(Session session, BufferedReader reader) throws MessagingException { |
| |
| int byteRead = -1; |
| int lastByteRead = LF; |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| try { |
| while ((byteRead = reader.read()) >= 0) { |
| // We are checking for the end of a multiline response |
| // the format is .CRLF |
| |
| // checking for the DOT and CR |
| if (lastByteRead == DOT && byteRead == CR) { |
| byteRead = reader.read(); |
| // now checking for the LF of the second CRLF |
| if (byteRead == LF) { |
| // end of response |
| break; |
| } |
| } |
| |
| out.write(byteRead); |
| lastByteRead = byteRead; |
| } |
| |
| if (session.getDebug()) { |
| session.getDebugOut().println("\n============================ Response Content==================\n"); |
| session.getDebugOut().write(out.toByteArray()); |
| session.getDebugOut().println("\n==============================================================\n"); |
| } |
| |
| } catch (IOException e) { |
| throw new MessagingException("Error processing a multi-line response", e); |
| } |
| |
| return new ByteArrayInputStream(out.toByteArray()); |
| } |
| |
| } |