/// <summary> /// 解析一个数据包 /// 不足一个封包时返回null /// </summary> /// <param name="streamReader">数据读取器</param> /// <param name="packet">数据包</param> /// <returns></returns> public static bool Parse(ISessionStreamReader streamReader, out FastPacket packet) { packet = null; const int packetMinSize = 16; if (streamReader.Length < packetMinSize || streamReader[0] != FastPacket.Mark) { return(false); } streamReader.Position = 1; var totalBytes = streamReader.ReadInt32(); if (totalBytes < packetMinSize) { return(false); } // 数据包未接收完整 if (streamReader.Length < totalBytes) { return(true); } // api名称数据长度 var apiNameLength = streamReader.ReadByte(); if (totalBytes < apiNameLength + packetMinSize) { return(false); } // api名称数据 var apiNameBytes = streamReader.ReadArray(apiNameLength); // 标识符 var id = streamReader.ReadInt64(); // 是否为客户端封包 var isFromClient = streamReader.ReadBoolean(); // 是否异常 var isException = streamReader.ReadBoolean(); // 实体数据 var body = streamReader.ReadArray(totalBytes - streamReader.Position); // 清空本条数据 streamReader.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> /// 生成表单和文件 /// </summary> /// <param name="request">请求</param> /// <param name="streamReader">数据读取器</param> /// <param name="boundary">边界</param> private static void GenerateMultipartFormAndFiles(HttpRequest request, ISessionStreamReader streamReader, string boundary) { var boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary); var maxPosition = streamReader.Length - Encoding.ASCII.GetBytes("--\r\n").Length; var files = new List <HttpFile>(); var form = new HttpNameValueCollection(); streamReader.Position = streamReader.Position + boundaryBytes.Length; while (streamReader.Position < maxPosition) { var headLength = streamReader.IndexOf(DoubleCRLF) + DoubleCRLF.Length; if (headLength < DoubleCRLF.Length) { break; } var head = streamReader.ReadString(Encoding.UTF8, headLength); var bodyLength = streamReader.IndexOf(boundaryBytes); if (bodyLength < 0) { break; } var mHead = new MultipartHead(head); if (mHead.TryGetFileName(out string fileName) == true) { var bytes = streamReader.ReadArray(bodyLength); var file = new HttpFile(mHead.Name, fileName, bytes); files.Add(file); }
/// <summary> /// 生成表单和文件 /// </summary> /// <param name="request">请求</param> /// <param name="streamReader">数据读取器</param> /// <param name="boundary">边界</param> private static void GenerateMultipartFormAndFiles(HttpRequest request, ISessionStreamReader streamReader, string boundary) { var boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary); var maxPosition = streamReader.Length - Encoding.ASCII.GetBytes("--\r\n").Length; var files = new List <HttpFile>(); var form = new HttpNameValueCollection(); streamReader.Position = streamReader.Position + boundaryBytes.Length; while (streamReader.Position < maxPosition) { var headLength = streamReader.IndexOf(DoubleCRLF) + DoubleCRLF.Length; if (headLength < DoubleCRLF.Length) { break; } var head = streamReader.ReadString(Encoding.UTF8, headLength); var bodyLength = streamReader.IndexOf(boundaryBytes); if (bodyLength < 0) { break; } string fileName = null; var partItem = new MultipartItem(head); if (partItem.TryGetFileName(out fileName) == true) { var bytes = streamReader.ReadArray(bodyLength); var file = new HttpFile(partItem.Name, fileName, bytes); files.Add(file); } else { var byes = streamReader.ReadArray(bodyLength); var value = HttpUtility.UrlDecode(byes, Encoding.UTF8); form.Add(partItem.Name, value); } streamReader.Position = streamReader.Position + boundaryBytes.Length; } request.Form = form; request.Files = files.ToArray(); }
/// <summary> /// 解析一个数据包 /// 不足一个封包时packet返回null /// 中间件不符合则返回false /// </summary> /// <param name="session">会话</param> /// <param name="packet">数据包</param> /// <returns></returns> public virtual bool Parse(ISessionStreamReader streamReader, ISession session, out string packet) { packet = null; try { int required = 28; int remain = session.RemainDataLength;//剩余长度 while (remain >= required) { // 实体数据 packet = Encoding.UTF8.GetString(streamReader.ReadArray(required)); // 清空本条数据 streamReader.Clear(required); return(true); } return(true); } catch (Exception) { return(false); } }
/// <summary> /// 解析请求的数据 /// 返回请求数据包 /// </summary> /// <param name="streamReader">数据读取器</param> /// <param name="requiredMask">是否要求必须Mask</param> /// <exception cref="NotSupportedException"></exception> /// <returns></returns> public unsafe static FrameRequest Parse(ISessionStreamReader streamReader, bool requiredMask = true) { if (streamReader.Length < 2) { return(null); } ByteBits byte0 = streamReader[0]; var fin = byte0[0]; var rsv = byte0.Take(1, 3); var frameCode = (FrameCodes)(byte)byte0.Take(4, 4); ByteBits byte1 = streamReader[1]; var mask = byte1[0]; if (requiredMask && mask == false) { throw new NotSupportedException("mask is required"); } if (Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0) { throw new NotSupportedException(); } var contentSize = 0; var contentLength = (int)byte1.Take(1, 7); streamReader.Position = 2; if (contentLength == 127) { contentSize = 8; contentLength = (int)streamReader.ReadUInt64(); } else if (contentLength == 126) { contentSize = 2; contentLength = (int)streamReader.ReadUInt16(); } var maskSize = mask ? 4 : 0; var packetLength = 2 + maskSize + contentSize + contentLength; if (streamReader.Length < packetLength) { return(null); } var maskingKey = mask ? streamReader.ReadArray(4) : null; var content = streamReader.ReadArray(contentLength); streamReader.Clear(packetLength); if (mask && 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 }); }