// We populate Message using the ImapList parsed by BODYSTRUCTURE returned from server.
private static void parseBodyStructure(ImapList bs, Part part, String id)
throws MessagingException {
if (bs.getElementOrNone(0).isList()) {
/*
* This is a multipart/*
*/
MimeMultipart mp = new MimeMultipart();
for (int i = 0, count = bs.size(); i < count; i++) {
ImapElement e = bs.getElementOrNone(i);
if (e.isList()) {
/*
* For each part in the message we're going to add a new BodyPart and parse
* into it.
*/
MimeBodyPart bp = new MimeBodyPart();
if (id.equals(ImapConstants.TEXT)) {
parseBodyStructure(bs.getListOrEmpty(i), bp, Integer.toString(i + 1));
} else {
parseBodyStructure(bs.getListOrEmpty(i), bp, id + "." + (i + 1));
}
mp.addBodyPart(bp);
} else {
if (e.isString()) {
mp.setSubType(bs.getStringOrEmpty(i).getString().toLowerCase());
}
break; // Ignore the rest of the list.
}
}
part.setBody(mp);
} else {
/*
* This is a body. We need to add as much information as we can find out about
* it to the Part.
*/
/*
body type
body subtype
body parameter parenthesized list
body id
body description
body encoding
body size
*/
final ImapString type = bs.getStringOrEmpty(0);
final ImapString subType = bs.getStringOrEmpty(1);
final String mimeType = (type.getString() + "/" + subType.getString()).toLowerCase();
final ImapList bodyParams = bs.getListOrEmpty(2);
final ImapString cid = bs.getStringOrEmpty(3);
final ImapString encoding = bs.getStringOrEmpty(5);
final int size = bs.getStringOrEmpty(6).getNumberOrZero();
if (MimeUtility.mimeTypeMatches(mimeType, MimeUtility.MIME_TYPE_RFC822)) {
// A body type of type MESSAGE and subtype RFC822
// contains, immediately after the basic fields, the
// envelope structure, body structure, and size in
// text lines of the encapsulated message.
// [MESSAGE, RFC822, [NAME, filename.eml], NIL, NIL, 7BIT, 5974, NIL,
// [INLINE, [FILENAME*0, Fwd: Xxx..., FILENAME*1, filename.eml]], NIL]
/*
* This will be caught by fetch and handled appropriately.
*/
// throw new MessagingException("BODYSTRUCTURE " +
// MimeUtility.MIME_TYPE_RFC822
// + " not yet supported.");
Logging.w("BODYSTRUCTURE " + MimeUtility.MIME_TYPE_RFC822 + " not yet supported.");
return;
}
/*
* Set the content type with as much information as we know right now.
*/
final StringBuilder contentType = new StringBuilder(mimeType);
/*
* If there are body params we might be able to get some more information out
* of them.
*/
for (int i = 1, count = bodyParams.size(); i < count; i += 2) {
// TODO We need to convert " into %22, but
// because MimeUtility.getHeaderParameter doesn't recognize it,
// we can't fix it for now.
contentType.append(
String.format(
";\n %s=\"%s\"",
bodyParams.getStringOrEmpty(i - 1).getString(),
bodyParams.getStringOrEmpty(i).getString()));
}
part.setHeader(MimeHeader.HEADER_CONTENT_TYPE, contentType.toString());
// Extension items
final ImapList bodyDisposition;
if (type.is(ImapConstants.TEXT) && bs.getElementOrNone(9).isList()) {
// If media-type is TEXT, 9th element might be: [body-fld-lines] := number
// So, if it's not a list, use 10th element.
// (Couldn't find evidence in the RFC if it's ALWAYS 10th element.)
bodyDisposition = bs.getListOrEmpty(9);
} else {
bodyDisposition = bs.getListOrEmpty(8);
}
final StringBuilder contentDisposition = new StringBuilder();
if (bodyDisposition.size() > 0) {
final String bodyDisposition0Str =
bodyDisposition.getStringOrEmpty(0).getString().toLowerCase();
if (!TextUtils.isEmpty(bodyDisposition0Str)) {
contentDisposition.append(bodyDisposition0Str);
}
final ImapList bodyDispositionParams = bodyDisposition.getListOrEmpty(1);
if (!bodyDispositionParams.isEmpty()) {
/*
* If there is body disposition information we can pull some more
* information about the attachment out.
*/
for (int i = 1, count = bodyDispositionParams.size(); i < count; i += 2) {
// TODO We need to convert " into %22. See above.
contentDisposition.append(
String.format(
";\n %s=\"%s\"",
bodyDispositionParams.getStringOrEmpty(i - 1).getString().toLowerCase(),
bodyDispositionParams.getStringOrEmpty(i).getString()));
}
}
}
if ((size > 0)
&& (MimeUtility.getHeaderParameter(contentDisposition.toString(), "size") == null)) {
// If the encoding is base64 and no Content-Disposition size fetched, then recounting the
// actual size: the encoded size multiplied by a fixed ratio
if (ENC_BASE64.equals(encoding.getString())) {
contentDisposition.append(String.format(";\n size=%d", (int) (size * BASE64_RATIO)));
} else {
contentDisposition.append(String.format(";\n size=%d", size));
}
}
if (contentDisposition.length() > 0) {
/*
* Set the content disposition containing at least the size. Attachment
* handling code will use this down the road.
*/
part.setHeader(MimeHeader.HEADER_CONTENT_DISPOSITION, contentDisposition.toString());
}
/*
* Set the Content-Transfer-Encoding header. Attachment code will use this
* to parse the body.
*/
if (!encoding.isEmpty()) {
part.setHeader(MimeHeader.HEADER_CONTENT_TRANSFER_ENCODING, encoding.getString());
}
/*
* Set the Content-ID header.
*/
if (!cid.isEmpty()) {
part.setHeader(MimeHeader.HEADER_CONTENT_ID, cid.getString());
}
if (size > 0) {
if (part instanceof ImapMessage) {
((ImapMessage) part).setSize(size);
} else if (part instanceof MimeBodyPart) {
((MimeBodyPart) part).setSize(size);
} else {
throw new MessagingException("Unknown part type " + part.toString());
}
}
part.setHeader(MimeHeader.HEADER_ANDROID_ATTACHMENT_STORE_DATA, id);
}
}
