/// <summary>
/// Sets item decoded value. Value will be encoded as needed and stored to item.Value property.
/// </summary>
/// <param name="value"></param>
public void SetDecodedValue(string value)
{
/* RFC 2426 vCrad 5. Differences From vCard v2.1
* The QUOTED-PRINTABLE inline encoding has been eliminated.
* Only the "B" encoding of [RFC 2047] is an allowed value for
* the ENCODING parameter.
*
* The CRLF character sequence in a text type value is specified
* with the backslash character sequence "\n" or "\N".
*
* Any COMMA or SEMICOLON in a text type value must be backslash escaped.
*/
// Remove encoding and charset parameters
string newParmString = "";
string[] parameters = m_Parameters.ToLower().Split(';');
foreach (string parameter in parameters)
{
string[] name_value = parameter.Split('=');
if (name_value[0] == "encoding" || name_value[0] == "charset")
{
}
else if (parameter.Length > 0)
{
newParmString += parameter + ";";
}
}
if (m_pCard.Version.StartsWith("3"))
{
// Add encoding parameter
if (!Net_Utils.IsAscii(value))
{
newParmString += "CHARSET=utf-8";
}
this.ParametersString = newParmString;
this.Value = vCard_Utils.Encode(m_pCard.Version, m_pCard.Charset, value);
}
else
{
if (NeedEncode(value))
{
// Add encoding parameter
newParmString += "ENCODING=QUOTED-PRINTABLE;CHARSET=" + m_pCard.Charset.WebName;
this.ParametersString = newParmString;
this.Value = vCard_Utils.Encode(m_pCard.Version, m_pCard.Charset, value);
}
else
{
this.ParametersString = newParmString;
this.Value = value;
}
}
}
/// <summary>
/// Sets item decoded value. Value will be encoded as needed and stored to item.Value property.
/// Also property item.ParametersString is updated to reflect right encoding(always base64, required by rfc) and charset (utf-8).
/// </summary>
/// <param name="value"></param>
public void SetDecodedValue(string value)
{
/* RFC 2426 vCrad 5. Differences From vCard v2.1
* The QUOTED-PRINTABLE inline encoding has been eliminated.
* Only the "B" encoding of [RFC 2047] is an allowed value for
* the ENCODING parameter.
*
* The CRLF character sequence in a text type value is specified
* with the backslash character sequence "\n" or "\N".
*
* Any COMMA or SEMICOLON in a text type value must be backslash escaped.
*/
// FIX ME: this must be done with structured fields
//value = value.Replace("\r\n","\n").Replace("\n","\\n");
//value = TextUtils.EscapeString(value,new char[]{',',';'});
bool needEncode = false;
if (!Net_Utils.IsAscii(value))
{
needEncode = true;
}
if (needEncode)
{
// Remove encoding and charset parameters
string newParmString = "";
string[] parameters = m_Parameters.ToLower().Split(';');
foreach (string parameter in parameters)
{
string[] name_value = parameter.Split('=');
if (name_value[0] == "encoding" || name_value[0] == "charset")
{
}
else if (parameter.Length > 0)
{
newParmString += parameter + ";";
}
}
// Add encoding parameter
newParmString += "ENCODING=b;CHARSET=utf-8";
this.ParametersString = newParmString;
this.Value = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(value));
}
else
{
this.Value = value;
}
}
/// <summary>
/// CHecks if specified value must be encoded.
/// </summary>
/// <param name="value">String value.</param>
/// <returns>Returns true if value must be encoded, otherwise false.</returns>
private bool NeedEncode(string value)
{
// We have 8-bit chars.
if (!Net_Utils.IsAscii(value))
{
return(true);
}
// Allow only printable chars and whitespaces.
foreach (char c in value)
{
if (char.IsControl(c))
{
return(true);
}
}
return(false);
}
/// <summary>
/// CHecks if specified value must be encoded.
/// </summary>
/// <param name="value">String value.</param>
/// <returns>Returns true if value must be encoded, otherwise false.</returns>
private bool NeedEncode(string value)
{
// We have 8-bit chars.
if (!Net_Utils.IsAscii(value))
{
return(true);
}
// Allow only prontable chars and whitespaces.
foreach (char c in value)
{
if (!(char.IsLetterOrDigit(c) || char.IsWhiteSpace(c)))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Returns header field parameters as string.
/// </summary>
/// <param name="charset">Charset to use to encode 8-bit characters. Value null means parameters not encoded.</param>
/// <returns>Returns header field parameters as string.</returns>
public string ToString(Encoding charset)
{
/* RFC 2231.
* If parameter conatins 8-bit byte, we need to encode parameter value
* If parameter value length bigger than MIME maximum allowed line length,
* we need split value.
*/
if (charset == null)
{
charset = Encoding.Default;
}
StringBuilder retVal = new StringBuilder();
foreach (MIME_h_Parameter parameter in this.ToArray())
{
if (string.IsNullOrEmpty(parameter.Value))
{
retVal.Append(";\r\n\t" + parameter.Name);
}
// We don't need to encode or split value.
else if ((charset == null || Net_Utils.IsAscii(parameter.Value)) && parameter.Value.Length < 76)
{
retVal.Append(";\r\n\t" + parameter.Name + "=" + TextUtils.QuoteString(parameter.Value));
}
// Use RFC 2047 to encode parameter.
else if (m_EncodeRfc2047)
{
retVal.Append(";\r\n\t" + parameter.Name + "=" + TextUtils.QuoteString(MIME_Encoding_EncodedWord.EncodeS(MIME_EncodedWordEncoding.B, Encoding.UTF8, false, parameter.Value)));
}
// We need to RFC 2231 encode/split value.
else
{
byte[] byteValue = charset.GetBytes(parameter.Value);
List <string> values = new List <string>();
// Do encoding/splitting.
int offset = 0;
char[] valueBuff = new char[50];
foreach (byte b in byteValue)
{
// We need split value as RFC 2231 says.
if (offset >= (50 - 3))
{
values.Add(new string(valueBuff, 0, offset));
offset = 0;
}
// Normal char, we don't need to encode.
if (MIME_Reader.IsAttributeChar((char)b))
{
valueBuff[offset++] = (char)b;
}
// We need to encode byte as %X2.
else
{
valueBuff[offset++] = '%';
valueBuff[offset++] = (b >> 4).ToString("X")[0];
valueBuff[offset++] = (b & 0xF).ToString("X")[0];
}
}
// Add pending buffer value.
if (offset > 0)
{
values.Add(new string(valueBuff, 0, offset));
}
for (int i = 0; i < values.Count; i++)
{
// Only fist value entry has charset and language info.
if (charset != null && i == 0)
{
retVal.Append(";\r\n\t" + parameter.Name + "*" + i.ToString() + "*=" + charset.WebName + "''" + values[i]);
}
else
{
retVal.Append(";\r\n\t" + parameter.Name + "*" + i.ToString() + "*=" + values[i]);
}
}
}
}
return(retVal.ToString());
}
