mirror of https://github.com/moparisthebest/k-9
104 lines
3.7 KiB
Java
104 lines
3.7 KiB
Java
package com.fsck.k9.mail.internet;
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import com.fsck.k9.mail.Address;
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import com.fsck.k9.mail.Message;
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import com.fsck.k9.mail.MessagingException;
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import com.fsck.k9.mail.Part;
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class JisSupport {
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public static final String SHIFT_JIS = "shift_jis";
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public static String getJisVariantFromMessage(Message message) throws MessagingException {
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if (message == null)
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return null;
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// If a receiver is known to use a JIS variant, the sender transfers the message after converting the
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// charset as a convention.
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String variant = getJisVariantFromReceivedHeaders(message);
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if (variant != null)
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return variant;
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// If a receiver is not known to use any JIS variants, the sender transfers the message without converting
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// the charset.
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variant = getJisVariantFromFromHeaders(message);
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if (variant != null)
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return variant;
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return getJisVariantFromMailerHeaders(message);
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}
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public static boolean isShiftJis(String charset) {
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return charset.length() > 17 && charset.startsWith("x-")
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&& charset.endsWith("-shift_jis-2007");
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}
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public static String getJisVariantFromAddress(String address) {
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if (address == null)
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return null;
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if (isInDomain(address, "docomo.ne.jp") || isInDomain(address, "dwmail.jp") ||
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isInDomain(address, "pdx.ne.jp") || isInDomain(address, "willcom.com") ||
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isInDomain(address, "emnet.ne.jp") || isInDomain(address, "emobile.ne.jp"))
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return "docomo";
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else if (isInDomain(address, "softbank.ne.jp") || isInDomain(address, "vodafone.ne.jp") ||
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isInDomain(address, "disney.ne.jp") || isInDomain(address, "vertuclub.ne.jp"))
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return "softbank";
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else if (isInDomain(address, "ezweb.ne.jp") || isInDomain(address, "ido.ne.jp"))
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return "kddi";
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return null;
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}
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private static String getJisVariantFromMailerHeaders(Message message) throws MessagingException {
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String mailerHeaders[] = message.getHeader("X-Mailer");
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if (mailerHeaders == null || mailerHeaders.length == 0)
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return null;
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if (mailerHeaders[0].startsWith("iPhone Mail ") || mailerHeaders[0].startsWith("iPad Mail "))
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return "iphone";
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return null;
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}
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private static String getJisVariantFromReceivedHeaders(Part message) throws MessagingException {
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String receivedHeaders[] = message.getHeader("Received");
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if (receivedHeaders == null)
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return null;
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for (String receivedHeader : receivedHeaders) {
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String address = getAddressFromReceivedHeader(receivedHeader);
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if (address == null)
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continue;
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String variant = getJisVariantFromAddress(address);
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if (variant != null)
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return variant;
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}
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return null;
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}
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private static String getAddressFromReceivedHeader(String receivedHeader) {
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// Not implemented yet! Extract an address from the FOR clause of the given Received header.
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return null;
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}
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private static String getJisVariantFromFromHeaders(Message message) throws MessagingException {
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Address addresses[] = message.getFrom();
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if (addresses == null || addresses.length == 0)
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return null;
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return getJisVariantFromAddress(addresses[0].getAddress());
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}
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private static boolean isInDomain(String address, String domain) {
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int index = address.length() - domain.length() - 1;
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if (index < 0)
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return false;
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char c = address.charAt(index);
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if (c != '@' && c != '.')
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return false;
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return address.endsWith(domain);
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}
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}
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