using System; using System.Collections.Generic; using System.Text; using HigLabo.Net.Mail; namespace HigLabo.Net.Internal { /// <summary> /// Represent context of request and response process and provide data about context. /// </summary> internal class Pop3DataReceiveContext : DataReceiveContext { private Boolean _IsMultiLine = false; internal Pop3DataReceiveContext(Encoding encoding, Boolean isMultiLine) : base(encoding) { _IsMultiLine = isMultiLine; } internal Pop3DataReceiveContext(Encoding encoding, Boolean isMultiLine, Action<String> callbackFunction) : base(encoding) { _IsMultiLine = isMultiLine; this.EndGetResponse = callbackFunction; } /// <summary> /// Read buffer data to Data property and initialize buffer. /// If response has next data,return true. /// </summary> /// <param name="size"></param> /// <returns>If response has next data,return true</returns> public override Boolean ReadBuffer(Int32 size) { Byte[] bb = this.Buffer; Byte[] lastBytes = null; for (int i = 0; i < size; i++) { this.Stream.WriteByte(bb[i]); bb[i] = 0; } if (this._IsMultiLine == false) { if (size < bb.Length) { return false; } if (this.Stream.Length > 1) { lastBytes = this.GetLastByte(2); //\r\n if (lastBytes[0] == AsciiCharCode.CarriageReturn.GetNumber() && lastBytes[1] == AsciiCharCode.LineFeed.GetNumber()) { return false; } } } else { if (this.Stream.Length > 4) { lastBytes = this.GetLastByte(5); //\r\n.\r\n if (lastBytes[0] == AsciiCharCode.CarriageReturn.GetNumber() && lastBytes[1] == AsciiCharCode.LineFeed.GetNumber() && lastBytes[2] == AsciiCharCode.Period.GetNumber() && lastBytes[3] == AsciiCharCode.CarriageReturn.GetNumber() && lastBytes[4] == AsciiCharCode.LineFeed.GetNumber()) { return false; } } } return true; } } }
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