QByteArray QxtMailAttachment::mimeData()
{
bool isMultipart = false;
QTextCodec* latin1 = QTextCodec::codecForName("latin1");
if (qxt_d->attachments.count()) {
if (!qxt_d->contentType.startsWith("multipart/", Qt::CaseInsensitive))
setExtraHeader(QStringLiteral("Content-Type"), QStringLiteral("multipart/mixed"));
}
QByteArray rv = "Content-Type: " + qxt_d->contentType.toLatin1() + "\r\n";
if (qxt_d->contentType.startsWith("multipart/", Qt::CaseInsensitive)) {
isMultipart = true;
}
else {
rv += "Content-Transfer-Encoding: base64\r\n";
}
foreach(const QString& r, qxt_d->extraHeaders.keys())
{
rv += qxt_fold_mime_header(r, extraHeader(r), latin1);
}
rv += "\r\n";
const QByteArray& d = rawData();
int chars = isMultipart? 73 : 57; // multipart preamble supposed to be 7bit latin1
for (int pos = 0; pos < d.length(); pos += chars)
{
if (isMultipart) {
rv += d.mid(pos, chars) + "\r\n";
} else {
rv += d.mid(pos, chars).toBase64() + "\r\n";
}
}
if (isMultipart) {
QMutableMapIterator<QString, QxtMailAttachment> it(qxt_d->attachments);
while (it.hasNext()) {
rv += "--" + qxt_d->boundary + "\r\n";
rv += it.next().value().mimeData();
}
rv += "--" + qxt_d->boundary + "--\r\n";
}
return rv;
}
QByteArray QxtMailMessage::rfc2822() const
{
// Use quoted-printable if requested
bool useQuotedPrintable = (extraHeader(QStringLiteral("Content-Transfer-Encoding")).toLower() == QLatin1String("quoted-printable"));
// Use base64 if requested
bool useBase64 = (extraHeader(QStringLiteral("Content-Transfer-Encoding")).toLower() == QLatin1String("base64"));
// Check to see if plain text is ASCII-clean; assume it isn't if QP or base64 was requested
QTextCodec* latin1 = QTextCodec::codecForName("latin1");
bool bodyIsAscii = latin1->canEncode(body()) && !useQuotedPrintable && !useBase64;
QHash<QString, QxtMailAttachment> attach = attachments();
QByteArray rv;
if (!sender().isEmpty() && !hasExtraHeader(QStringLiteral("From")))
{
rv += qxt_fold_mime_header(QStringLiteral("From"), sender(), latin1);
}
if (!qxt_d->rcptTo.isEmpty())
{
rv += qxt_fold_mime_header(QStringLiteral("To"), qxt_d->rcptTo.join(QStringLiteral(", ")), latin1);
}
if (!qxt_d->rcptCc.isEmpty())
{
rv += qxt_fold_mime_header(QStringLiteral("Cc"), qxt_d->rcptCc.join(QStringLiteral(", ")), latin1);
}
if (!subject().isEmpty())
{
rv += qxt_fold_mime_header(QStringLiteral("Subject"), subject(), latin1);
}
if (!bodyIsAscii)
{
if (!hasExtraHeader(QStringLiteral("MIME-Version")) && !attach.count())
rv += "MIME-Version: 1.0\r\n";
// If no transfer encoding has been requested, guess.
// Heuristic: If >20% of the first 100 characters aren't
// 7-bit clean, use base64, otherwise use Q-P.
if(!bodyIsAscii && !useQuotedPrintable && !useBase64)
{
QString b = body();
int nonAscii = 0;
int ct = b.length();
for (int i = 0; i < ct && i < 100; i++)
{
if (QXT_MUST_QP(b[i])) nonAscii++;
}
useQuotedPrintable = !(nonAscii > 20);
useBase64 = !useQuotedPrintable;
}
}
if (attach.count())
{
if (qxt_d->boundary.isEmpty())
qxt_d->boundary = QUuid::createUuid().toString().toLatin1().replace("{", "").replace("}", "");
if (!hasExtraHeader(QStringLiteral("MIME-Version")))
rv += "MIME-Version: 1.0\r\n";
if (!hasExtraHeader(QStringLiteral("Content-Type")))
rv += "Content-Type: multipart/mixed; boundary=" + qxt_d->boundary + "\r\n";
}
else if (!bodyIsAscii && !hasExtraHeader(QStringLiteral("Content-Transfer-Encoding")))
{
if (!useQuotedPrintable)
{
// base64
rv += "Content-Transfer-Encoding: base64\r\n";
}
else
{
// quoted-printable
rv += "Content-Transfer-Encoding: quoted-printable\r\n";
}
}
for(const QString& r: qxt_d->extraHeaders.keys())
{
if ((r.toLower() == QLatin1String("content-type") || r.toLower() == QLatin1String("content-transfer-encoding")) && attach.count())
{
// Since we're in multipart mode, we'll be outputting this later
continue;
}
rv += qxt_fold_mime_header(r, extraHeader(r), latin1);
}
rv += "\r\n";
if (attach.count())
{
// we're going to have attachments, so output the lead-in for the message body
rv += "This is a message with multiple parts in MIME format.\r\n";
rv += "--" + qxt_d->boundary + "\r\nContent-Type: ";
if (hasExtraHeader(QStringLiteral("Content-Type")))
rv += extraHeader(QStringLiteral("Content-Type")).toLatin1() + "\r\n";
else
rv += "text/plain; charset=UTF-8\r\n";
if (hasExtraHeader(QStringLiteral("Content-Transfer-Encoding")))
{
rv += "Content-Transfer-Encoding: " + extraHeader(QStringLiteral("Content-Transfer-Encoding")).toLatin1() + "\r\n";
}
else if (!bodyIsAscii)
{
if (!useQuotedPrintable)
{
// base64
rv += "Content-Transfer-Encoding: base64\r\n";
}
else
{
// quoted-printable
rv += "Content-Transfer-Encoding: quoted-printable\r\n";
}
}
rv += "\r\n";
}
if (bodyIsAscii)
{
QByteArray b = latin1->fromUnicode(body());
int len = b.length();
QByteArray line = "";
QByteArray word = "";
for (int i = 0; i < len; i++)
{
if (b[i] == '\n' || b[i] == '\r')
{
if (line.isEmpty())
{
line = word;
word = "";
}
else if (line.length() + word.length() + 1 <= 78)
{
line = line + ' ' + word;
word = "";
}
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
if ((b[i+1] == '\n' || b[i+1] == '\r') && b[i] != b[i+1])
{
// If we're looking at a CRLF pair, skip the second half
i++;
}
line = word;
}
else if (b[i] == ' ')
{
if (line.length() + word.length() + 1 > 78)
{
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
line = word;
}
else if (line.isEmpty())
{
line = word;
}
else
{
line = line + ' ' + word;
}
word = "";
}
else
{
word += b[i];
}
}
if (line.length() + word.length() + 1 > 78)
{
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
line = word;
}
else if (!word.isEmpty())
{
line += ' ' + word;
}
if(!line.isEmpty()) {
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
}
}
else if (useQuotedPrintable)
{
QByteArray b = body().toUtf8();
int ct = b.length();
QByteArray line;
for (int i = 0; i < ct; i++)
{
if(b[i] == '\n' || b[i] == '\r')
{
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
line = "";
if ((b[i+1] == '\n' || b[i+1] == '\r') && b[i] != b[i+1])
{
// If we're looking at a CRLF pair, skip the second half
i++;
}
}
else if (line.length() > 74)
{
rv += line + "=\r\n";
line = "";
}
if (QXT_MUST_QP(b[i]))
{
line += "=" + b.mid(i, 1).toHex().toUpper();
}
else
{
line += b[i];
}
}
if(!line.isEmpty()) {
if(line[0] == '.')
rv += ".";
rv += line + "\r\n";
}
}
else /* base64 */
{
QByteArray b = body().toUtf8().toBase64();
int ct = b.length();
for (int i = 0; i < ct; i += 78)
{
rv += b.mid(i, 78) + "\r\n";
}
}
if (attach.count())
{
for(const QString& filename: attach.keys())
{
rv += "--" + qxt_d->boundary + "\r\n";
rv += qxt_fold_mime_header(QStringLiteral("Content-Disposition"), QDir(filename).dirName(), latin1, "attachment; filename=");
rv += attach[filename].mimeData();
}
rv += "--" + qxt_d->boundary + "--\r\n";
}
return rv;
}