/// <summary>
/// Computes the MD5 checksum of the content.
/// </summary>
/// <remarks>
/// Computes the MD5 checksum of the MIME content in its canonical
/// format and then base64-encodes the result.
/// </remarks>
/// <returns>The md5sum of the content.</returns>
/// <exception cref="System.InvalidOperationException">
/// The <see cref="ContentObject"/> is <c>null</c>.
/// </exception>
public string ComputeContentMd5()
{
if (ContentObject == null)
{
throw new InvalidOperationException("Cannot compute Md5 checksum without a ContentObject.");
}
using (var stream = ContentObject.Open()) {
byte[] checksum;
using (var filtered = new FilteredStream(stream)) {
if (ContentType.IsMimeType("text", "*"))
{
filtered.Add(new Unix2DosFilter());
}
using (var md5 = MD5.Create())
checksum = md5.ComputeHash(filtered);
}
var base64 = new Base64Encoder(true);
var digest = new byte[base64.EstimateOutputLength(checksum.Length)];
int n = base64.Flush(checksum, 0, checksum.Length, digest);
return(Encoding.ASCII.GetString(digest, 0, n));
}
}
public override void WriteValue(byte[] value)
{
base.WriteValue(value);
if (value != null)
{
_writer.Write(_quoteChar);
Base64Encoder.Encode(value, 0, value.Length);
Base64Encoder.Flush();
_writer.Write(_quoteChar);
}
}
static string GenerateBoundary()
{
var base64 = new Base64Encoder(true);
var rand = new Random();
var digest = new byte[16];
var b64buf = new byte[24];
int length;
rand.NextBytes(digest);
length = base64.Flush(digest, 0, 16, b64buf);
return("=-" + Encoding.ASCII.GetString(b64buf, 0, length));
}
static string GenerateBoundary()
{
var base64 = new Base64Encoder(true);
var digest = new byte[16];
var buf = new byte[24];
int length;
MimeUtils.GetRandomBytes(digest);
length = base64.Flush(digest, 0, digest.Length, buf);
return("=-" + Encoding.ASCII.GetString(buf, 0, length));
}
/// <summary>
/// Writes a <see cref="Byte"/>[] value.
/// </summary>
/// <param name="value">The <see cref="Byte"/>[] value to write.</param>
public override void WriteValue(byte[] value)
{
if (value == null)
{
WriteNull();
}
else
{
InternalWriteValue(JsonToken.Bytes);
_writer.Write(_quoteChar);
Base64Encoder.Encode(value, 0, value.Length);
Base64Encoder.Flush();
_writer.Write(_quoteChar);
}
}
static string GenerateBoundary()
{
var base64 = new Base64Encoder(true);
var digest = new byte[16];
var b64buf = new byte[24];
int length;
using (var rand = new RNGCryptoServiceProvider()) {
rand.GetBytes(digest);
}
length = base64.Flush(digest, 0, 16, b64buf);
return("=-" + Encoding.ASCII.GetString(b64buf, 0, length));
}
static string GenerateBoundary()
{
var base64 = new Base64Encoder(true);
var digest = new byte[16];
int length;
MimeUtils.GetRandomBytes(digest);
var buf = ArrayPool <byte> .Shared.Rent(24);
try {
length = base64.Flush(digest, 0, digest.Length, buf);
return("=-" + Encoding.ASCII.GetString(buf, 0, length));
} finally {
ArrayPool <byte> .Shared.Return(buf);
}
}
