/// <summary> /// 生成Post得到的表单和文件 /// </summary> /// <param name="request"></param> /// <param name="stream"></param> private static void GeneratePostFormAndFiles(HttpRequest request, INsStream stream) { var boundary = default(string); if (request.IsApplicationFormRequest() == true) { HttpRequest.GenerateApplicationForm(request); } else if (request.IsMultipartFormRequest(out boundary) == true) { if (request.Body.Length >= boundary.Length) { HttpRequest.GenerateMultipartFormAndFiles(request, stream, boundary); } } if (request.Form == null) { request.Form = new HttpNameValueCollection(); } if (request.Files == null) { request.Files = new HttpFile[0]; } }
/// <summary> /// 获取当前的http方法长度 /// </summary> /// <param name="stream">收到的数据</param> /// <returns></returns> private static int GetMthodLength(INsStream stream) { var maxLength = Math.Min(stream.Length, Protocol.MedthodMaxLength + 1); for (var i = 0; i < maxLength; i++) { if (stream[i] == Protocol.Space) { return(i - 1); } } return(maxLength); }
/// <summary> /// 当接收到远程端的数据时,将触发此方法 /// </summary> /// <param name="stream">接收到的历史数据</param> protected sealed override void OnReceive(INsStream stream) { while (true) { var packet = default(FastPacket); if (FastPacket.Parse(stream, out packet) == false) { stream.Clear(); } if (packet == null) { break; } // 新线程处理业务内容 Task.Factory.StartNew(() => this.OnReceivePacket(packet)); } }
/// <summary> /// 生成表单和文件 /// </summary> /// <param name="request"></param> /// <param name="stream"></param> /// <param name="boundary">边界</param> private static void GenerateMultipartFormAndFiles(HttpRequest request, INsStream stream, string boundary) { var boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary); var maxPosition = stream.Length - Encoding.ASCII.GetBytes("--\r\n").Length; var files = new List <HttpFile>(); var form = new HttpNameValueCollection(); stream.Position = stream.Position + boundaryBytes.Length; while (stream.Position < maxPosition) { var headLength = stream.IndexOf(Protocol.DoubleCrlf) + Protocol.DoubleCrlf.Length; if (headLength < Protocol.DoubleCrlf.Length) { break; } var head = stream.ReadString(headLength, Encoding.UTF8); var bodyLength = stream.IndexOf(boundaryBytes); if (bodyLength < 0) { break; } var mHead = new MultipartHead(head); if (mHead.IsFile == true) { var bytes = stream.ReadArray(bodyLength); var file = new HttpFile(mHead, bytes); files.Add(file); } else { var byes = stream.ReadArray(bodyLength); var value = HttpUtility.UrlDecode(byes, Encoding.UTF8); form.Add(mHead.Name, value); } stream.Position = stream.Position + boundaryBytes.Length; } request.Form = form; request.Files = files.ToArray(); }
/// <summary> /// 是否为http协议 /// </summary> /// <param name="stream">收到的数据</param> /// <param name="headerLength">头数据长度,包括双换行</param> /// <returns></returns> public static bool IsHttp(INsStream stream, out int headerLength) { var methodLength = Protocol.GetMthodLength(stream); var methodName = stream.ReadString(methodLength, Encoding.ASCII); if (Protocol.MethodNames.Any(m => m.StartsWith(methodName, StringComparison.OrdinalIgnoreCase)) == false) { headerLength = 0; return(false); } stream.Position = 0; var headerIndex = stream.IndexOf(Protocol.DoubleCrlf); if (headerIndex < 0) { headerLength = 0; return(true); } headerLength = headerIndex + Protocol.DoubleCrlf.Length; return(true); }
/// <summary> /// 当接收到远程端的数据时,将触发此方法 /// </summary> /// <param name="stream">接收到的历史数据</param> /// <returns></returns> protected abstract void OnReceive(INsStream stream);
/// <summary> /// 解析一个数据包 /// 不足一个封包时返回null /// </summary> /// <param name="stream">接收到的历史数据</param> /// <param name="packet">数据包</param> /// <returns></returns> public static bool Parse(INsStream stream, out FastPacket packet) { if (stream.Length < 1 || stream[0] != FastPacket.Mark) { packet = null; return(false); } if (stream.Length < 5) { packet = null; return(true); } stream.Position = 1; const int packetMinSize = 16; var totalBytes = stream.ReadInt32(); if (totalBytes < packetMinSize) { packet = null; return(false); } // 数据包未接收完整 if (stream.Length < totalBytes) { packet = null; return(true); } // api名称数据长度 var apiNameLength = stream.ReadByte(); if (totalBytes < apiNameLength + packetMinSize) { packet = null; return(false); } // api名称数据 var apiNameBytes = stream.ReadArray(apiNameLength); // 标识符 var id = stream.ReadInt64(); // 是否为客户端封包 var isFromClient = stream.ReadBoolean(); // 是否异常 var isException = stream.ReadBoolean(); // 实体数据 var body = stream.ReadArray(totalBytes - stream.Position); // 清空本条数据 stream.Clear(totalBytes); var apiName = Encoding.UTF8.GetString(apiNameBytes); packet = new FastPacket(apiName, id, isFromClient) { TotalBytes = totalBytes, ApiNameLength = apiNameLength, IsException = isException, Body = body }; return(true); }
/// <summary> /// 解析请求的数据 /// 返回请求数据包 /// </summary> /// <param name="stream">所有收到的数据</param> /// <exception cref="NotSupportedException"></exception> /// <returns></returns> public unsafe static FrameRequest Parse(INsStream stream) { if (stream.Length < 2) { return(null); } ByteBits byte0 = stream[0]; var fin = byte0[0]; var frameCode = (FrameCodes)(byte)byte0.Take(4, 4); if (fin == false || frameCode == FrameCodes.Continuation) { return(null); } var rsv = byte0.Take(1, 3); ByteBits byte1 = stream[1]; var mask = byte1[0]; if (mask == false || Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0) { throw new NotSupportedException(); } var contentSize = 0; var contentLength = (int)byte1.Take(1, 7); stream.Position = 2; if (contentLength == 127) { contentSize = 8; contentLength = (int)stream.ReadUInt64(); } else if (contentLength == 126) { contentSize = 2; contentLength = (int)stream.ReadUInt16(); } var packetLength = 6 + contentSize + contentLength; if (stream.Length < packetLength) { return(null); } var maskingKey = stream.ReadArray(4); var content = stream.ReadArray(contentLength); stream.Clear(packetLength); if (contentLength > 0) { fixed(byte *pcontent = &content[0], pmask = &maskingKey[0]) { for (var i = 0; i < contentLength; i++) { *(pcontent + i) = (byte)(*(pcontent + i) ^ *(pmask + i % 4)); } } } return(new FrameRequest { Fin = fin, Rsv = rsv, Mask = mask, Frame = frameCode, ContentLength = contentLength, MaskingKey = maskingKey, Content = content }); }