/// <summary> /// Does period handling. /// </summary> /// <param name="strm">Input stream.</param> /// <param name="add_Remove">If true add periods, else removes periods.</param> /// <param name="setStrmPosTo0">If true sets stream position to 0.</param> /// <returns></returns> public static MemoryStream DoPeriodHandling(Stream strm, bool add_Remove, bool setStrmPosTo0) { MemoryStream replyData = new MemoryStream(); byte[] crlf = new byte[] { (byte)'\r', (byte)'\n' }; if (setStrmPosTo0) { strm.Position = 0; } StreamHelper r = new StreamHelper(strm, null); byte[] line = r.ReadLine(); // Loop through all lines while (line != null) { if (line.Length > 0) { if (line[0] == (byte)'.') { /* Add period Rfc 2821 4.5.2 * - Before sending a line of mail text, the SMTP client checks the * first character of the line. If it is a period, one additional * period is inserted at the beginning of the line. */ if (add_Remove) { replyData.WriteByte((byte)'.'); replyData.Write(line, 0, line.Length); } /* Remove period Rfc 2821 4.5.2 * If the first character is a period , the first characteris deleted. */ else { replyData.Write(line, 1, line.Length - 1); } break; } else { replyData.Write(line, 0, line.Length); } } replyData.Write(crlf, 0, crlf.Length); // Read next line line = r.ReadLine(); } replyData.Position = 0; return(replyData); }
/// <summary> /// Scans invalid CR or LF combination in stream. Returns true if contains invalid CR or LF combination. /// </summary> /// <param name="strm">Stream which to check.</param> /// <returns>Returns true if contains invalid CR or LF combination.</returns> public static bool ScanInvalid_CR_or_LF(Stream strm) { StreamHelper lineReader = new StreamHelper(strm, null); byte[] line = lineReader.ReadLine(); while (line != null) { foreach (byte b in line) { // Contains CR or LF. It cannot conatian such sumbols, because CR must be paired with LF // and we currently reading lines with CRLF combination. if (b == 10 || b == 13) { return(true); } } line = lineReader.ReadLine(); } return(false); }
/// <summary> /// Does period handling. /// </summary> /// <param name="strm">Input stream.</param> /// <param name="add_Remove">If true add periods, else removes periods.</param> /// <param name="setStrmPosTo0">If true sets stream position to 0.</param> /// <returns></returns> public static MemoryStream DoPeriodHandling(Stream strm,bool add_Remove,bool setStrmPosTo0) { MemoryStream replyData = new MemoryStream(); byte[] crlf = new byte[]{(byte)'\r',(byte)'\n'}; if(setStrmPosTo0){ strm.Position = 0; } StreamHelper r = new StreamHelper(strm, null); byte[] line = r.ReadLine(); // Loop through all lines while(line != null){ if(line.Length > 0){ if(line[0] == (byte)'.'){ /* Add period Rfc 2821 4.5.2 - Before sending a line of mail text, the SMTP client checks the first character of the line. If it is a period, one additional period is inserted at the beginning of the line. */ if(add_Remove){ replyData.WriteByte((byte)'.'); replyData.Write(line,0,line.Length); } /* Remove period Rfc 2821 4.5.2 If the first character is a period , the first characteris deleted. */ else{ replyData.Write(line,1,line.Length-1); } break; } else{ replyData.Write(line,0,line.Length); } } replyData.Write(crlf,0,crlf.Length); // Read next line line = r.ReadLine(); } replyData.Position = 0; return replyData; }
/// <summary> /// Scans invalid CR or LF combination in stream. Returns true if contains invalid CR or LF combination. /// </summary> /// <param name="strm">Stream which to check.</param> /// <returns>Returns true if contains invalid CR or LF combination.</returns> public static bool ScanInvalid_CR_or_LF(Stream strm) { StreamHelper lineReader = new StreamHelper(strm, null); byte[] line = lineReader.ReadLine(); while(line != null){ foreach(byte b in line){ // Contains CR or LF. It cannot conatian such sumbols, because CR must be paired with LF // and we currently reading lines with CRLF combination. if(b == 10 || b == 13){ return true; } } line = lineReader.ReadLine(); } return false; }