/* * Copyright 2016 The Netty Project * * The Netty Project licenses this file to you 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 io.netty.handler.codec.smtp; import io.netty.util.AsciiString; import io.netty.util.internal.ObjectUtil; import io.netty.util.internal.UnstableApi; import java.util.ArrayList; import java.util.List; /** * Provides utility methods to create {@link SmtpRequest}s. */ @UnstableApi public final class SmtpRequests { private static final SmtpRequest DATA = new DefaultSmtpRequest(SmtpCommand.DATA); private static final SmtpRequest NOOP = new DefaultSmtpRequest(SmtpCommand.NOOP); private static final SmtpRequest RSET = new DefaultSmtpRequest(SmtpCommand.RSET); private static final SmtpRequest HELP_NO_ARG = new DefaultSmtpRequest(SmtpCommand.HELP); private static final SmtpRequest QUIT = new DefaultSmtpRequest(SmtpCommand.QUIT); private static final AsciiString FROM_NULL_SENDER = new AsciiString("FROM:<>"); /** * Creates a {@code HELO} request. */ public static SmtpRequest helo(CharSequence hostname) { return new DefaultSmtpRequest(SmtpCommand.HELO, hostname); } /** * Creates a {@code EHLO} request. */ public static SmtpRequest ehlo(CharSequence hostname) { return new DefaultSmtpRequest(SmtpCommand.EHLO, hostname); } /** * Creates a {@code NOOP} request. */ public static SmtpRequest noop() { return NOOP; } /** * Creates a {@code DATA} request. */ public static SmtpRequest data() { return DATA; } /** * Creates a {@code RSET} request. */ public static SmtpRequest rset() { return RSET; } /** * Creates a {@code HELP} request. */ public static SmtpRequest help(String cmd) { return cmd == null ? HELP_NO_ARG : new DefaultSmtpRequest(SmtpCommand.HELP, cmd); } /** * Creates a {@code QUIT} request. */ public static SmtpRequest quit() { return QUIT; } /** * Creates a {@code MAIL} request. */ public static SmtpRequest mail(CharSequence sender, CharSequence... mailParameters) { if (mailParameters == null || mailParameters.length == 0) { return new DefaultSmtpRequest(SmtpCommand.MAIL, sender != null ? "FROM:<" + sender + '>' : FROM_NULL_SENDER); } else { List<CharSequence> params = new ArrayList<CharSequence>(mailParameters.length + 1); params.add(sender != null? "FROM:<" + sender + '>' : FROM_NULL_SENDER); for (CharSequence param : mailParameters) { params.add(param); } return new DefaultSmtpRequest(SmtpCommand.MAIL, params); } } /** * Creates a {@code RCPT} request. */ public static SmtpRequest rcpt(CharSequence recipient, CharSequence... rcptParameters) { ObjectUtil.checkNotNull(recipient, "recipient"); if (rcptParameters == null || rcptParameters.length == 0) { return new DefaultSmtpRequest(SmtpCommand.RCPT, "TO:<" + recipient + '>'); } else { List<CharSequence> params = new ArrayList<CharSequence>(rcptParameters.length + 1); params.add("TO:<" + recipient + '>'); for (CharSequence param : rcptParameters) { params.add(param); } return new DefaultSmtpRequest(SmtpCommand.RCPT, params); } } /** * Creates a {@code EXPN} request. */ public static SmtpRequest expn(CharSequence mailingList) { return new DefaultSmtpRequest(SmtpCommand.EXPN, ObjectUtil.checkNotNull(mailingList, "mailingList")); } /** * Creates a {@code VRFY} request. */ public static SmtpRequest vrfy(CharSequence user) { return new DefaultSmtpRequest(SmtpCommand.VRFY, ObjectUtil.checkNotNull(user, "user")); } private SmtpRequests() { } }