/// <summary>
/// 尝试当作http头解析，生成请求对象
/// 如果不是http头则返回false
/// </summary>
/// <param name="context">上下文</param>
/// <param name="request">请求对象</param>
/// <param name="headerLength">请求头长度</param>
/// <param name="contentLength">请求内容长度</param>
/// <returns></returns>
private static bool TryGetRequest(IContenxt context, out HttpRequest request, out int headerLength, out int contentLength)
{
request = null;
headerLength = 0;
contentLength = 0;
var reader = context.StreamReader;
// HTTP Method
reader.Position = 0;
var methodLength = reader.IndexOf(Space);
if (methodLength < 0 || methodLength > MedthodMaxLength)
{
return(false);
}
var methodName = reader.ReadString(Encoding.ASCII, methodLength);
if (MethodNames.Contains(methodName) == false)
{
return(false);
}
var httpMethod = (HttpMethod)Enum.Parse(typeof(HttpMethod), methodName, true);
// HTTP Path
reader.Position += 1;
var pathLength = reader.IndexOf(Space);
if (pathLength < 0)
{
return(false);
}
var path = reader.ReadString(Encoding.ASCII, pathLength);
// HTTP Version
reader.Position += 1;
if (reader.StartWith(HttpVersion11) == false)
{
return(false);
}
reader.Position += HttpVersion11.Length;
if (reader.StartWith(CRLF) == false)
{
return(false);
}
// HTTP Second line
reader.Position += CRLF.Length;
var endIndex = reader.IndexOf(DoubleCRLF);
if (endIndex < 0)
{
return(false);
}
var httpHeader = new HttpHeader();
headerLength = reader.Position + endIndex + DoubleCRLF.Length;
while (reader.Position < headerLength - CRLF.Length)
{
var keyLength = reader.IndexOf(KvSpliter);
if (keyLength <= 0)
{
break;
}
var key = reader.ReadString(Encoding.ASCII, keyLength);
reader.Position += KvSpliter.Length;
var valueLength = reader.IndexOf(CRLF);
if (valueLength < 0)
{
break;
}
var value = reader.ReadString(Encoding.ASCII, valueLength);
if (reader.StartWith(CRLF) == false)
{
break;
}
reader.Position += CRLF.Length;
httpHeader.Add(key, value);
}
if (httpMethod != HttpMethod.GET)
{
contentLength = httpHeader.TryGet <int>("Content-Length");
if (reader.Length - headerLength < contentLength)
{
return(true);// 数据未完整
}
}
request = new HttpRequest
{
LocalEndPoint = context.Session.LocalEndPoint,
RemoteEndPoint = context.Session.RemoteEndPoint,
HttpMethod = httpMethod,
Headers = httpHeader
};
var scheme = context.Session.IsSecurity ? "https" : "http";
var host = httpHeader["Host"];
if (string.IsNullOrEmpty(host) == true)
{
host = context.Session.LocalEndPoint.ToString();
}
request.Url = new Uri(string.Format("{0}://{1}{2}", scheme, host, path));
request.Path = request.Url.AbsolutePath;
request.Query = HttpNameValueCollection.Parse(request.Url.Query.TrimStart('?'));
return(true);
}
/// <summary>
/// 解析回复头信息
/// </summary>
/// <param name="streamReader">数据读取器</param>
/// <returns></returns>
public static HttpResponseParseResult Parse(ISessionStreamReader streamReader)
{
var result = new HttpResponseParseResult();
streamReader.Position = 0;
if (streamReader.StartWith(HttpVersion11) == false)
{
return(result);
}
var endIndex = streamReader.IndexOf(DoubleCRLF);
if (endIndex < 0)
{
return(result);
}
streamReader.Position += HttpVersion11.Length + 1;
var statusLength = streamReader.IndexOf(Space);
if (statusLength < 0)
{
return(result);
}
var status = streamReader.ReadString(Encoding.ASCII, statusLength);
streamReader.Position += 1;
var descriptionLenth = streamReader.IndexOf(CRLF);
if (descriptionLenth < 0)
{
return(result);
}
var description = streamReader.ReadString(Encoding.ASCII, descriptionLenth);
streamReader.Position += CRLF.Length;
var httpHeader = new HttpHeader();
var headerLength = endIndex + DoubleCRLF.Length;
while (streamReader.Position < headerLength)
{
var keyLength = streamReader.IndexOf(KvSpliter);
if (keyLength <= 0)
{
break;
}
var key = streamReader.ReadString(Encoding.ASCII, keyLength);
streamReader.Position += KvSpliter.Length;
var valueLength = streamReader.IndexOf(CRLF);
if (valueLength < 0)
{
break;
}
var value = streamReader.ReadString(Encoding.ASCII, valueLength);
if (streamReader.StartWith(CRLF) == false)
{
break;
}
streamReader.Position += CRLF.Length;
httpHeader.Add(key, value);
}
result.Description = description;
result.Status = int.Parse(status);
result.IsHttp = true;
result.Header = httpHeader;
return(result);
}
/// <summary>
/// 解析连接请求信息
/// 如果数据未完整则返回null
/// </summary>
/// <param name="buffer">接收到的原始数量</param>
/// <param name="localEndpoint">服务器的本地终结点</param>
/// <param name="remoteEndpoint">远程端的IP和端口</param>
/// <exception cref="HttpException"></exception>
/// <returns></returns>
public static HttpRequest Parse(ReceiveBuffer buffer, IPEndPoint localEndpoint, IPEndPoint remoteEndpoint)
{
buffer.Position = 0;
var doubleCrlf = Encoding.ASCII.GetBytes("\r\n\r\n");
var headerIndex = buffer.IndexOf(doubleCrlf);
if (headerIndex < 0)
{
return(null); // 数据未完整
}
var headerLength = headerIndex + doubleCrlf.Length;
var headerString = buffer.ReadString(headerLength, Encoding.ASCII);
const string pattern = @"^(?<method>[^\s]+)\s(?<path>[^\s]+)\sHTTP\/1\.1\r\n" +
@"((?<field_name>[^:\r\n]+):\s(?<field_value>[^\r\n]*)\r\n)+" +
@"\r\n";
var match = Regex.Match(headerString, pattern, RegexOptions.IgnoreCase);
if (match.Success == false)
{
throw new HttpException(400, "请求中有语法问题，或不能满足请求");
}
var httpMethod = GetHttpMethod(match.Groups["method"].Value);
var httpHeader = new HttpHeader(match.Groups["field_name"].Captures, match.Groups["field_value"].Captures);
var contentLength = httpHeader.TryGet <int>("Content-Length");
if (httpMethod == HttpMethod.POST && buffer.Length - headerLength < contentLength)
{
return(null); // 数据未完整
}
var request = new HttpRequest
{
LocalEndPoint = localEndpoint,
RemoteEndPoint = remoteEndpoint,
HttpMethod = httpMethod,
Headers = httpHeader
};
request.Url = new Uri("http://localhost:" + localEndpoint.Port + match.Groups["path"].Value);
request.Path = request.Url.AbsolutePath;
request.Query = new HttpNameValueCollection(HttpUtility.UrlDecode(request.Url.Query.TrimStart('?')));
if (httpMethod == HttpMethod.GET)
{
request.InputStrem = new byte[0];
request.Form = new HttpNameValueCollection();
request.Files = new HttpFile[0];
}
else
{
request.InputStrem = buffer.ReadArray(contentLength);
buffer.Position = headerLength;
HttpRequest.GeneratePostFormAndFiles(request, buffer);
}
buffer.Clear(headerLength + contentLength);
return(request);
}
/// <summary>
/// 解析连接请求信息
/// 如果数据未完整则返回null
/// </summary>
/// <param name="context">上下文</param>
/// <param name="request">http请求</param>
/// <exception cref="HttpException"></exception>
/// <returns></returns>
public static bool Parse(IContenxt context, out HttpRequest request)
{
var headerLength = 0;
request = null;
if (Protocol.IsHttp(context.Buffer, out headerLength) == false)
{
return(false);
}
if (headerLength <= 0)
{
return(true);
}
context.Buffer.Position = 0;
var headerString = context.Buffer.ReadString(headerLength, Encoding.ASCII);
const string pattern = @"^(?<method>[^\s]+)\s(?<path>[^\s]+)\sHTTP\/1\.1\r\n" +
@"((?<field_name>[^:\r\n]+):\s(?<field_value>[^\r\n]*)\r\n)+" +
@"\r\n";
var match = Regex.Match(headerString, pattern, RegexOptions.IgnoreCase);
if (match.Success == false)
{
return(false);
}
var httpMethod = GetHttpMethod(match.Groups["method"].Value);
var httpHeader = HttpHeader.Parse(match.Groups["field_name"].Captures, match.Groups["field_value"].Captures);
var contentLength = httpHeader.TryGet <int>("Content-Length");
if (httpMethod == HttpMethod.POST && context.Buffer.Length - headerLength < contentLength)
{
return(true); // 数据未完整
}
request = new HttpRequest
{
LocalEndPoint = context.Session.LocalEndPoint,
RemoteEndPoint = context.Session.RemoteEndPoint,
HttpMethod = httpMethod,
Headers = httpHeader
};
var scheme = context.Session.IsSecurity ? "https" : "http";
var url = string.Format("{0}://localhost:{1}{2}", scheme, context.Session.LocalEndPoint.Port, match.Groups["path"].Value);
request.Url = new Uri(url);
request.Path = request.Url.AbsolutePath;
request.Query = HttpNameValueCollection.Parse(request.Url.Query.TrimStart('?'), false);
if (httpMethod == HttpMethod.GET)
{
request.Body = new byte[0];
request.Form = new HttpNameValueCollection();
request.Files = new HttpFile[0];
}
else
{
request.Body = context.Buffer.ReadArray(contentLength);
context.Buffer.Position = headerLength;
HttpRequest.GeneratePostFormAndFiles(request, context.Buffer);
}
context.Buffer.Clear(headerLength + contentLength);
return(true);
}
/// <summary>
/// 解析连接请求信息
/// </summary>
/// <param name="context">上下文</param>
/// <exception cref="HttpException"></exception>
/// <returns></returns>
public static HttpParseResult Parse(IContenxt context)
{
var headerLength = 0;
var result = new HttpParseResult();
context.StreamReader.Position = 0;
result.IsHttp = HttpRequestParser.IsHttp(context.StreamReader, out headerLength);
if (result.IsHttp == false || headerLength <= 0)
{
return(result);
}
var headerString = context.StreamReader.ReadString(Encoding.ASCII, headerLength);
const string pattern = @"^(?<method>[^\s]+)\s(?<path>[^\s]+)\sHTTP\/1\.1\r\n" +
@"((?<field_name>[^:\r\n]+):\s(?<field_value>[^\r\n]*)\r\n)+" +
@"\r\n";
var match = Regex.Match(headerString, pattern, RegexOptions.IgnoreCase);
result.IsHttp = match.Success;
if (result.IsHttp == false)
{
return(result);
}
var httpMethod = HttpRequestParser.CastHttpMethod(match.Groups["method"].Value);
var httpHeader = HttpHeader.Parse(match.Groups["field_name"].Captures, match.Groups["field_value"].Captures);
var contentLength = httpHeader.TryGet <int>("Content-Length");
if (httpMethod == HttpMethod.POST && context.StreamReader.Length - headerLength < contentLength)
{
return(result);// 数据未完整
}
var request = new HttpRequest
{
LocalEndPoint = context.Session.LocalEndPoint,
RemoteEndPoint = context.Session.RemoteEndPoint,
HttpMethod = httpMethod,
Headers = httpHeader
};
var scheme = context.Session.IsSecurity ? "https" : "http";
var host = httpHeader["Host"];
if (string.IsNullOrEmpty(host) == true)
{
host = context.Session.LocalEndPoint.ToString();
}
var url = string.Format("{0}://{1}{2}", scheme, host, match.Groups["path"].Value);
request.Url = new Uri(url);
request.Path = request.Url.AbsolutePath;
request.Query = HttpNameValueCollection.Parse(request.Url.Query.TrimStart('?'));
switch (httpMethod)
{
case HttpMethod.GET:
request.Body = new byte[0];
request.Form = new HttpNameValueCollection();
request.Files = new HttpFile[0];
break;
default:
request.Body = context.StreamReader.ReadArray(contentLength);
context.StreamReader.Position = headerLength;
HttpRequestParser.GeneratePostFormAndFiles(request, context.StreamReader);
break;
}
result.Request = request;
result.PackageLength = headerLength + contentLength;
return(result);
}