public static void SingleTestMediaTypeEncoding(string value)
{
MediaType mt = new MediaTypeBuilder(
"x",
"y").SetParameter(
"z",
value).ToMediaType();
string topLevel = mt.TopLevelType;
string sub = mt.SubType;
string mtstring = "MIME-Version: 1.0\r\nContent-Type: " + mt +
"\r\nContent-Transfer-Encoding: base64\r\n\r\n";
Message msg = MessageFromString(mtstring);
Assert.AreEqual(topLevel, msg.ContentType.TopLevelType);
Assert.AreEqual(sub, msg.ContentType.SubType);
Assert.AreEqual(
value,
msg.ContentType.GetParameter("z"),
mt.ToString());
}
private void Generate(IWriter output, int depth) {
var haveMimeVersion = false;
var haveContentEncoding = false;
var haveContentType = false;
var haveContentDisp = false;
var haveMsgId = false;
var haveFrom = false;
var haveDate = false;
var haveHeaders = new bool[11];
byte[] bodyToWrite = this.body;
var builder = new MediaTypeBuilder(this.ContentType);
string contentDisp = (this.ContentDisposition == null) ? null :
this.ContentDisposition.ToString();
var transferEnc = 0;
var isMultipart = false;
string boundary = String.Empty;
if (builder.IsMultipart) {
boundary = GenerateBoundary(depth);
builder.SetParameter("boundary", boundary);
isMultipart = true;
}
if (!isMultipart) {
if (builder.TopLevelType.Equals("message")) {
if (builder.SubType.Equals("delivery-status") ||
builder.SubType.Equals("global-delivery-status")) {
bodyToWrite = DowngradeDeliveryStatus(bodyToWrite);
}
bool msgCanBeUnencoded = CanBeUnencoded(bodyToWrite, depth > 0);
if ((builder.SubType.Equals("rfc822") || builder.SubType.Equals(
"news")) && !msgCanBeUnencoded) {
builder.SetSubType("global");
} else if (builder.SubType.Equals("disposition-notification") &&
!msgCanBeUnencoded) {
builder.SetSubType("global-disposition-notification");
} else if (builder.SubType.Equals("delivery-status") &&
!msgCanBeUnencoded) {
builder.SetSubType("global-delivery-status");
} else if (!msgCanBeUnencoded && !builder.SubType.Equals("global") &&
!builder.SubType.Equals("global-disposition-notification") &&
!builder.SubType.Equals("global-delivery-status") &&
!builder.SubType.Equals("global-headers")) {
#if DEBUG
throw new MessageDataException("Message body can't be encoded: " +
builder.ToString() + ", " + this.ContentType);
#else
{
throw new MessageDataException("Message body can't be encoded");
}
#endif
}
}
}
string topLevel = builder.TopLevelType;
transferEnc = topLevel.Equals("message") ||
topLevel.Equals("multipart") ? (topLevel.Equals("multipart") || (
!builder.SubType.Equals("global") &&
!builder.SubType.Equals("global-headers") &&
!builder.SubType.Equals("global-disposition-notification") &&
!builder.SubType.Equals("global-delivery-status"))) ?
EncodingSevenBit : TransferEncodingToUse(
bodyToWrite,
depth > 0) : TransferEncodingToUse(bodyToWrite, depth > 0);
string encodingString = "7bit";
if (transferEnc == EncodingBase64) {
encodingString = "base64";
} else if (transferEnc == EncodingQuotedPrintable) {
encodingString = "quoted-printable";
}
// Write the header fields
for (int i = 0; i < this.headers.Count; i += 2) {
string name = this.headers[i];
string value = this.headers[i + 1];
if (name.Equals("content-type")) {
if (haveContentType) {
// Already outputted, continue
continue;
}
haveContentType = true;
value = builder.ToString();
}
if (name.Equals("content-disposition")) {
if (haveContentDisp || contentDisp == null) {
// Already outputted, continue
continue;
}
haveContentDisp = true;
value = contentDisp;
} else if (name.Equals("content-transfer-encoding")) {
if (haveContentEncoding) {
// Already outputted, continue
continue;
}
haveContentEncoding = true;
value = encodingString;
} else if (name.Equals("date")) {
if (haveDate) {
continue;
}
haveDate = true;
} else if (name.Equals("from")) {
if (haveFrom) {
// Already outputted, continue
continue;
}
haveFrom = true;
}
if (
depth > 0 && (
name.Length < 8 || !name.Substring(
0,
8).Equals("content-"))) {
// don't generate header fields not starting with "Content-"
// in body parts
continue;
}
if (name.Equals("mime-version")) {
haveMimeVersion = true;
} else if (name.Equals("message-id")) {
if (haveMsgId) {
// Already outputted, continue
continue;
}
haveMsgId = true;
} else {
if (ValueHeaderIndices.ContainsKey(name)) {
int headerIndex = ValueHeaderIndices[name];
if (headerIndex < 9) {
if (haveHeaders[headerIndex]) {
// Already outputted, continue
continue;
}
haveHeaders[headerIndex] = true;
if (!this.IsValidAddressingField(name)) {
value = GenerateAddressList(
ParseAddresses(this.GetMultipleHeaders(name)));
if (value.Length == 0) {
// No addresses, synthesize a field
value = this.SynthesizeField(name);
}
}
}
if (headerIndex == 9 || headerIndex == 10) {
// Resent-From/Resent-Sender, can appear
// more than once
value = GenerateAddressList(ParseAddresses(value));
if (value.Length == 0) {
// No addresses, synthesize a field
value = this.SynthesizeField(name);
}
}
}
}
string rawField = Capitalize(name) + ":" +
(StartsWithWhitespace(value) ? String.Empty : " ") + value;
if (CanOutputRaw(rawField)) {
AppendAscii(output, rawField);
if (rawField.IndexOf(": ", StringComparison.Ordinal) < 0) {
throw new MessageDataException("No colon+space: " + rawField);
}
} else if (HasTextToEscape(value)) {
string downgraded =
HeaderFieldParsers.GetParser(name).DowngradeFieldValue(value);
if (
HasTextToEscapeIgnoreEncodedWords(
downgraded,
0,
downgraded.Length)) {
if (name.Equals("message-id") ||
name.Equals("resent-message-id") || name.Equals(
"in-reply-to") || name.Equals("references") || name.Equals(
"original-recipient") || name.Equals("final-recipient")) {
// Header field still contains invalid characters (such
// as non-ASCII characters in 7-bit messages), convert
// to a downgraded field
name = "downgraded-" + name;
downgraded =
Rfc2047.EncodeString(ParserUtility.TrimSpaceAndTab(value));
} else {
#if DEBUG
throw new
MessageDataException("Header field still has non-Ascii or controls: " +
name + " " + value);
#else
throw new MessageDataException(
"Header field still has non-Ascii or controls");
#endif
}
}
bool haveDquote = downgraded.IndexOf('"') >= 0;
var encoder = new WordWrapEncoder(!haveDquote);
encoder.AddString(Capitalize(name) + ": " + downgraded);
string newValue = encoder.ToString();
AppendAscii(output, newValue);
} else {
bool haveDquote = value.IndexOf('"') >= 0;
var encoder = new WordWrapEncoder(!haveDquote);
encoder.AddString(Capitalize(name) + ": " + value);
string newValue = encoder.ToString();
AppendAscii(output, newValue);
}
AppendAscii(output, "\r\n");
}
if (!haveFrom && depth == 0) {
// Output a synthetic From field if it doesn't
// exist and this isn't a body part
AppendAscii(output, "From: [email protected]\r\n");
}
if (!haveDate && depth == 0) {
AppendAscii(output, "Date: ");
AppendAscii(
output,
GetDateString(DateTimeUtilities.GetCurrentLocalTime()));
AppendAscii(output, "\r\n");
}
if (!haveMsgId && depth == 0) {
AppendAscii(output, "Message-ID:\r\n ");
AppendAscii(output, this.GenerateMessageID());
AppendAscii(output, "\r\n");
}
if (!haveMimeVersion && depth == 0) {
AppendAscii(output, "MIME-Version: 1.0\r\n");
}
if (!haveContentType) {
AppendAscii(output, "Content-Type: " + builder + "\r\n");
}
if (!haveContentEncoding) {
AppendAscii(
output,
"Content-Transfer-Encoding: " + encodingString + "\r\n");
}
ICharacterEncoder bodyEncoder = null;
switch (transferEnc) {
case EncodingBase64:
bodyEncoder = new Base64Encoder(true, builder.IsText, false);
break;
case EncodingQuotedPrintable:
bodyEncoder = new QuotedPrintableEncoder(
builder.IsText ? 2 : 0,
false);
break;
default:
bodyEncoder = new IdentityEncoder();
break;
}
// Write the body
AppendAscii(output, "\r\n");
if (!isMultipart) {
var index = 0;
while (true) {
int c = (index >= bodyToWrite.Length) ? -1 :
((int)bodyToWrite[index++]) & 0xff;
int count = bodyEncoder.Encode(c, output);
if (count == -2) {
throw new MessageDataException("encoding error");
}
if (count == -1) {
break;
}
}
} else {
foreach (Message part in this.Parts) {
AppendAscii(output, "\r\n--" + boundary + "\r\n");
part.Generate(output, depth + 1);
}
AppendAscii(output, "\r\n--" + boundary + "--");
}
}