int ReadReqHeaderReqRow(HttpHeader header, char[] pack, int packlen, ref int startpos, ref int identlen)
{
int nextpos;
header.type = 0;
//请求方法
nextpos = GetIdentifier(' ', pack, packlen, ref startpos, ref identlen);
if (identlen == 0)
{
return(0);
}
string key = new string(pack, startpos, identlen);
header.method = ShardRes.GetInstance().GetHttpRequestMethod(key);
if (header.method == HttpRequestMethod.HTTP_METHOD_UNKNOWN)
{
return(0);
}
//URL
startpos = nextpos;
nextpos = GetIdentifier(' ', pack, packlen, ref startpos, ref identlen);
string a = new string(pack, startpos, 1);
int cmp = string.Compare(a, "/");
if (identlen == 0 || cmp != 0)
{
return(0);
}
header.url = new string(pack, startpos, identlen);
//协议版本
startpos = nextpos;
nextpos = GetIdentifier('\r', pack, packlen, ref startpos, ref identlen, true);
if (identlen == 0)
{
return(0);
}
header.ver = new string(pack, startpos, identlen);
//\r\n
startpos = nextpos;
nextpos = MatchIdentifier("\r\n", pack, packlen, ref startpos, ref identlen);
if (identlen == 0)
{
return(0);
}
return(nextpos);
}
string CreateHttpReqHeader(HttpHeader header)
{
//请求头
if (header.type == 0)
{
string method = ShardRes.GetInstance().GetHttpRequestMethodStr(header.method);
string req = method + " " + header.url + " " + header.ver + "\r\n";
req += CreateHttpHeaderOptionStr(header) + "\r\n";
return(req);
}
//响应头
string first = header.ver + " " + header.stateCode + " " + header.stateMsg + "\r\n";
string headOpts = CreateHttpHeaderOptionStr(header);
first += headOpts + "\r\n";
return(first);
}
/// <summary>
/// 定义公有方法提供一个全局访问点,同时你也可以定义公有属性来提供全局访问点
/// </summary>
/// <returns></returns>
public static ShardRes GetInstance()
{
// 当第一个线程运行到这里时，此时会对locker对象 "加锁"，
// 当第二个线程运行该方法时，首先检测到locker对象为"加锁"状态，该线程就会挂起等待第一个线程解锁
// lock语句运行完之后（即线程运行完之后）会对该对象"解锁"
// 双重锁定只需要一句判断就可以了
if (uniqueInstance == null)
{
lock (locker)
{
// 如果类的实例不存在则创建，否则直接返回
if (uniqueInstance == null)
{
uniqueInstance = new ShardRes();
}
}
}
return(uniqueInstance);
}
public override int ReadStreamToHeader(HttpHeader header, ByteStream readStream, bool isNetToHost)
{
readStream.isByteAlign = false;
byte[] bytepack = readStream.ReadBytes(readStream.GetBufSize());
char[] pack = Encoding.ASCII.GetChars(bytepack);
int packlen = readStream.GetBufSize();
int state = 0;
int startpos = 0, identlen = 0, nextpos = 0;
while (true)
{
switch (state)
{
case 0:
{
GetIdentifier(' ', pack, packlen, ref startpos, ref identlen);
if (identlen == 0)
{
goto error;
}
string key = new string(pack, startpos, identlen);
header.method = ShardRes.GetInstance().GetHttpRequestMethod(key);
if (header.method != HttpRequestMethod.HTTP_METHOD_UNKNOWN)
{
startpos = ReadReqHeaderReqRow(header, pack, packlen, ref startpos, ref identlen);
}
else
{
startpos = ReadRespHeaderStateRow(header, pack, packlen, ref startpos, ref identlen);
}
if (startpos == 0)
{
goto error;
}
state = 1;
}
break;
case 1:
{
while (true)
{
//头部字段名
nextpos = GetIdentifier(':', pack, packlen, ref startpos, ref identlen, true);
if (identlen == 0)
{
startpos = nextpos;
nextpos = MatchIdentifier("\r\n", pack, packlen, ref startpos, ref identlen);
if (identlen == 0)
{
goto error;
}
goto end;
}
string field = new string(pack, startpos, identlen);
//头部字段值
startpos = nextpos + 1;
nextpos = GetIdentifier('\r', pack, packlen, ref startpos, ref identlen, true);
if (identlen != 0)
{
string value = new string(pack, startpos, identlen);
header.fieldMap[field] = value;
}
startpos = nextpos;
nextpos = MatchIdentifier("\r\n", pack, packlen, ref startpos, ref identlen);
if (identlen == 0)
{
goto error;
}
startpos = nextpos;
}
}
// break;
}
}
error:
header.isVaild = false;
return(0);
end:
header.isVaild = true;
return(readStream.GetNumberOfCurtBytes());
}
