/// <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(IContext context, IByteStream stream, bool isSSL, out HttpRequest request, out int headerLength, out int contentLength)
{
request = null;
headerLength = 0;
contentLength = 0;
IByteStream reader = stream;
ChannelBase channel = context.Channel;
if (channel == null)
{
return(false);
}
// HTTP Method
reader.SetReaderIndex(0);
int methodLength = reader.BytesBefore(Space);
if (methodLength < 0 || methodLength > MedthodMaxLength)
{
return(false);
}
string methodName = reader.ReadString(Encoding.ASCII, methodLength);
if (MethodNames.Contains(methodName) == false)
{
return(false);
}
HttpMethod httpMethod = (HttpMethod)Enum.Parse(typeof(HttpMethod), methodName, true);
// HTTP Path
reader.ReadSkip(1);
int pathLength = reader.BytesBefore(Space);
if (pathLength < 0)
{
return(false);
}
string path = reader.ReadString(Encoding.ASCII, pathLength);
// HTTP Version
reader.ReadSkip(1);
if (reader.StartWith(HttpVersion11) == false)
{
return(false);
}
reader.ReadSkip(HttpVersion11.Length);
if (reader.StartWith(CRLF) == false)
{
return(false);
}
// HTTP Second line
reader.ReadSkip(CRLF.Length);
int endIndex = reader.BytesBefore(DoubleCRLF);
if (endIndex < 0)
{
return(false);
}
HttpNameValueCollection httpHeader = new HttpNameValueCollection();
headerLength = reader.ReaderIndex + endIndex + DoubleCRLF.Length;
while (reader.ReaderIndex < headerLength - CRLF.Length)
{
int keyLength = reader.BytesBefore(KvSpliter);
if (keyLength <= 0)
{
break;
}
string key = reader.ReadString(Encoding.ASCII, keyLength);
reader.ReadSkip(KvSpliter.Length);
int valueLength = reader.BytesBefore(CRLF);
if (valueLength < 0)
{
break;
}
string value = reader.ReadString(Encoding.ASCII, valueLength);
if (reader.StartWith(CRLF) == false)
{
break;
}
reader.ReadSkip(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 = (IPEndPoint)channel.LocalEndPoint,
RemoteEndPoint = (IPEndPoint)channel.RemoteEndPoint,
HttpMethod = httpMethod,
Headers = httpHeader
};
//获取请求cookie
string reqcookies = httpHeader.TryGet <string>("Cookie");
if (reqcookies != null)
{
GenerateCookies(request, reqcookies);
}
string scheme = isSSL ? "https" : "http";
string host = httpHeader["Host"];
if (string.IsNullOrEmpty(host) == true)
{
host = channel.LocalEndPoint.ToString();
}
request.Host = host;
string referer = httpHeader.TryGet <string>("Referer");
if (!string.IsNullOrEmpty(referer))
{
try
{
request.RefererUrl = new Uri(referer);
}
catch { }
}
request.UserAgent = httpHeader.TryGet <string>("User-Agent", "");
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);
}
public bool StartWith(byte[] bs)
{
return(_stream.StartWith(bs));
}