/// <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)
{
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);
}