/// <summary>
/// Gets the decoded text content using the provided charset to override
/// the charset specified in the Content-Type parameters.
/// </summary>
/// <remarks>
/// Uses the provided charset encoding to convert the raw text content
/// into a unicode string, overriding any charset specified in the
/// Content-Type header.
/// </remarks>
/// <returns>The decoded text.</returns>
/// <param name="charset">The charset encoding to use.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="charset"/> is <c>null</c>.
/// </exception>
public string GetText(Encoding charset)
{
if (charset == null)
{
throw new ArgumentNullException("charset");
}
using (var memory = new MemoryStream()) {
using (var filtered = new FilteredStream(memory)) {
filtered.Add(new CharsetFilter(charset, Encoding.UTF8));
ContentObject.DecodeTo(filtered);
filtered.Flush();
#if PORTABLE
var buffer = memory.ToArray();
int length = buffer.Length;
#else
var buffer = memory.GetBuffer();
int length = (int)memory.Length;
#endif
return(Encoding.UTF8.GetString(buffer, 0, length));
}
}
}
/// <summary>
/// Writes the <see cref="MimeKit.MimePart"/> to the specified output stream.
/// </summary>
/// <param name="options">The formatting options.</param>
/// <param name="stream">The output stream.</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <exception cref="System.ArgumentNullException">
/// <para><paramref name="options"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="stream"/> is <c>null</c>.</para>
/// </exception>
/// <exception cref="System.OperationCanceledException">
/// The operation was canceled via the cancellation token.
/// </exception>
/// <exception cref="System.IO.IOException">
/// An I/O error occurred.
/// </exception>
public override void WriteTo(FormatOptions options, Stream stream, CancellationToken cancellationToken)
{
base.WriteTo(options, stream, cancellationToken);
if (ContentObject == null)
{
return;
}
if (ContentObject.Encoding != encoding)
{
if (encoding == ContentEncoding.UUEncode)
{
cancellationToken.ThrowIfCancellationRequested();
var begin = string.Format("begin 0644 {0}", FileName ?? "unknown");
var buffer = Encoding.UTF8.GetBytes(begin);
stream.Write(buffer, 0, buffer.Length);
stream.Write(options.NewLineBytes, 0, options.NewLineBytes.Length);
}
// transcode the content into the desired Content-Transfer-Encoding
using (var filtered = new FilteredStream(stream)) {
filtered.Add(EncoderFilter.Create(encoding));
if (encoding != ContentEncoding.Binary)
{
filtered.Add(options.CreateNewLineFilter());
}
ContentObject.DecodeTo(filtered, cancellationToken);
filtered.Flush();
}
if (encoding == ContentEncoding.UUEncode)
{
cancellationToken.ThrowIfCancellationRequested();
var buffer = Encoding.ASCII.GetBytes("end");
stream.Write(buffer, 0, buffer.Length);
stream.Write(options.NewLineBytes, 0, options.NewLineBytes.Length);
}
}
else if (encoding != ContentEncoding.Binary)
{
using (var filtered = new FilteredStream(stream)) {
filtered.Add(options.CreateNewLineFilter());
ContentObject.WriteTo(filtered, cancellationToken);
filtered.Flush();
}
}
else
{
ContentObject.WriteTo(stream, cancellationToken);
}
}
/// <summary>
/// Gets the decoded text content using the provided charset to override
/// the charset specified in the Content-Type parameters.
/// </summary>
/// <returns>The decoded text.</returns>
/// <param name="charset">The charset encoding to use.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="charset"/> is <c>null</c>.
/// </exception>
public string GetText(Encoding charset)
{
if (charset == null)
{
throw new ArgumentNullException("charset");
}
using (var memory = new MemoryStream()) {
using (var filtered = new FilteredStream(memory)) {
filtered.Add(new CharsetFilter(charset, Encoding.UTF8));
ContentObject.DecodeTo(filtered);
filtered.Flush();
return(Encoding.UTF8.GetString(memory.GetBuffer(), 0, (int)memory.Length));
}
}
}
/// <summary>
/// Gets the decoded text content using the provided charset encoding to
/// override the charset specified in the Content-Type parameters.
/// </summary>
/// <remarks>
/// Uses the provided charset encoding to convert the raw text content
/// into a unicode string, overriding any charset specified in the
/// Content-Type header.
/// </remarks>
/// <returns>The decoded text.</returns>
/// <param name="encoding">The charset encoding to use.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="encoding"/> is <c>null</c>.
/// </exception>
public string GetText(Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
using (var memory = new MemoryStream()) {
ContentObject.DecodeTo(memory);
#if PORTABLE
var buffer = memory.ToArray();
#else
var buffer = memory.GetBuffer();
#endif
return(encoding.GetString(buffer, 0, (int)memory.Length));
}
}
/// <summary>
/// Calculates the most efficient content encoding given the specified constraint.
/// </summary>
/// <remarks>
/// If no <see cref="ContentObject"/> is set, <see cref="ContentEncoding.SevenBit"/> will be returned.
/// </remarks>
/// <returns>The most efficient content encoding.</returns>
/// <param name="constraint">The encoding constraint.</param>
/// <param name="maxLineLength">The maximum allowable length for a line (not counting the CRLF). Must be between <c>72</c> and <c>998</c> (inclusive).</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <exception cref="System.ArgumentOutOfRangeException">
/// <para><paramref name="maxLineLength"/> is not between <c>72</c> and <c>998</c> (inclusive).</para>
/// <para>-or-</para>
/// <para><paramref name="constraint"/> is not a valid value.</para>
/// </exception>
/// <exception cref="System.OperationCanceledException">
/// The operation was canceled via the cancellation token.
/// </exception>
/// <exception cref="System.IO.IOException">
/// An I/O error occurred.
/// </exception>
public ContentEncoding GetBestEncoding(EncodingConstraint constraint, int maxLineLength, CancellationToken cancellationToken = default(CancellationToken))
{
if (ContentObject == null)
{
return(ContentEncoding.SevenBit);
}
using (var measure = new MeasuringStream()) {
using (var filtered = new FilteredStream(measure)) {
var filter = new BestEncodingFilter();
filtered.Add(filter);
ContentObject.DecodeTo(filtered, cancellationToken);
filtered.Flush();
return(filter.GetBestEncoding(constraint, maxLineLength));
}
}
}
/// <summary>
/// Gets the decoded text content using the provided charset encoding to
/// override the charset specified in the Content-Type parameters.
/// </summary>
/// <remarks>
/// Uses the provided charset encoding to convert the raw text content
/// into a unicode string, overriding any charset specified in the
/// Content-Type header.
/// </remarks>
/// <returns>The decoded text.</returns>
/// <param name="encoding">The charset encoding to use.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="encoding"/> is <c>null</c>.
/// </exception>
public string GetText(Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
if (ContentObject == null)
{
return(string.Empty);
}
using (var memory = new MemoryStream()) {
ContentObject.DecodeTo(memory);
#if !PORTABLE && !NETSTANDARD
var buffer = memory.GetBuffer();
#else
var buffer = memory.ToArray();
#endif
return(encoding.GetString(buffer, 0, (int)memory.Length));
}
}
