scode.asp

来自「ZD-BS是一个基于asp+access的个人blog系统 程序特点: 1.」· ASP 代码 · 共 168 行

<%@language="JScript" codepage="65001"%>

<%
Response.Expires=0;
Response.AddHeader("Pragma","no-cache");
Response.AddHeader("cache-ctrol","no-cache");
Response.ContentType="Image/GIF";
Session.Value("zd_SCode")=String(NumCode(4));
%>

<script language="VBScript" runat="server">

Class Com_GifCode_Class
	Public Noisy, Count, Width, Height, Angle, Offset, Border
	Private Graph(), Margin(3)

	Private Sub Class_Initialize()
		Randomize 
		Noisy = 7
		Count = 5
		Width = 60
		Height = 20
		Angle = 3
		Offset = 10
		Border = 2
	End Sub 
	Public Function Create(str)
		Dim i
		Dim vIndex
		ReDim Graph(Width-1, Height-1)
		For i = 0 To Count - 1
			vIndex=CInt(Mid(str,i+1,1)-1)
			SetDraw vIndex, i
		Next
	End Function

	Sub SetDot(pX, pY)
		If pX * (Width-pX-1) >= 0 And pY * (Height-pY-1) >= 0 Then
			Graph(pX, pY) = 1
		End If
	End Sub

	Public Sub SetDraw(pIndex, pNumber)
		If pIndex=-1 Then pIndex=9
		Dim DotData(9)
		DotData(0) = Array(30, 15, 50, 1, 50, 100)
		DotData(1) = Array(1 ,34 ,30 ,1 ,71, 1, 100, 34, 1, 100, 93, 100, 100, 86)
		DotData(2) = Array(1, 1, 100, 1, 42, 42, 100, 70, 50, 100, 1, 70)
		DotData(3) = Array(100, 73, 6, 73, 75, 6, 75, 100)
		DotData(4) = Array(100, 1, 1, 1, 1, 50, 50, 35, 100, 55, 100, 80, 50, 100, 1, 95)
		DotData(5) = Array(100, 20, 70, 1, 20, 1, 1, 30, 1, 80, 30, 100, 70, 100, 100, 80, 100, 60, 70, 50, 30, 50, 1, 60)
		DotData(6) = Array(6, 26, 6, 6, 100, 6, 53, 100)
		DotData(7) = Array(100, 30, 100, 20, 70, 1, 30, 1, 1, 20, 1, 30, 100, 70, 100, 80, 70, 100, 30, 100, 1, 80, 1, 70, 100, 30)
		DotData(8) = Array(1, 80, 30, 100, 80, 100, 100, 70, 100, 20, 70, 1, 30, 1, 1, 20, 1, 40, 30, 50, 70, 50, 100, 40)
		DotData(9) = Array(100, 20, 70, 1, 20, 1, 1, 30, 1, 80, 30, 100, 70, 100, 100, 80, 100, 60, 90, 20, 80,3)
		 

		Dim vExtent : vExtent = Width / Count
		Margin(0) = Border + vExtent * (Rnd * Offset) / 100 + Margin(1)
		Margin(1) = vExtent * (pNumber + 1) - Border - vExtent * (Rnd * Offset) / 100
		Margin(2) = Border + Height * (Rnd * Offset) / 100
		Margin(3) = Height - Border - Height * (Rnd * Offset) / 100
		
		Dim vStartX, vEndX, vStartY, vEndY
		Dim vWidth, vHeight, vDX, vDY, vDeltaT
		Dim vAngle, vLength
		
		vWidth =Int(Margin(1) - Margin(0))
		vHeight =Int(Margin(3) - Margin(2))
		vStartX = Int((DotData(pIndex)(0)-1) * vWidth / 100)
		vStartY = Int((DotData(pIndex)(1)-1) * vHeight / 100)
		
		Dim i, j
		For i = 1 To UBound(DotData(pIndex), 1)/2
			If DotData(pIndex)(2*i-2) <> 0 And DotData(pIndex)(2*i) <> 0 Then
				vEndX = (DotData(pIndex)(2*i)-1) * vWidth / 100
				vEndY = (DotData(pIndex)(2*i+1)-1) * vHeight / 100
				vDX = vEndX - vStartX
				vDY = vEndY - vStartY
				If vDX = 0 Then
					vAngle = Sgn(vDY) * 3.14/2
				Else
					vAngle = Atn(vDY / vDX)
				End If
				If Sin(vAngle) = 0 Then
					vLength = vDX
				Else
					vLength = vDY / Sin(vAngle)
				End If
				vAngle = vAngle + (Rnd - 0.5) * 2 * Angle * 3.14 * 2 / 100
				vDX = Int(Cos(vAngle) * vLength)
				vDY = Int(Sin(vAngle) * vLength)
				If Abs(vDX) > Abs(vDY) Then vDeltaT = Abs(vDX) Else vDeltaT = Abs(vDY)
				For j = 1 To vDeltaT
					SetDot Margin(0) + vStartX + j * vDX / vDeltaT, Margin(2) + vStartY + j * vDY / vDeltaT
				Next
				vStartX = vStartX + vDX
				vStartY = vStartY + vDY
			End If
		Next
	End Sub

	Public Sub Output()
		Response.BinaryWrite ChrB(Asc("G")) & ChrB(Asc("I")) & ChrB(Asc("F"))
		Response.BinaryWrite ChrB(Asc("8")) & ChrB(Asc("9")) & ChrB(Asc("a"))
		Response.BinaryWrite ChrB(Width Mod 256) & ChrB((Width \ 256) Mod 256)
		Response.BinaryWrite ChrB(Height Mod 256) & ChrB((Height \ 256) Mod 256)
		Response.BinaryWrite ChrB(128) & ChrB(0) & ChrB(0)
		Response.BinaryWrite ChrB(250) & ChrB(250) & ChrB(250)
		Response.BinaryWrite ChrB(0) & ChrB(0) & ChrB(0)
		Response.BinaryWrite ChrB(Asc(","))
		Response.BinaryWrite ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0)
		Response.BinaryWrite ChrB(Width Mod 256) & ChrB((Width \ 256) Mod 256)
		Response.BinaryWrite ChrB(Height Mod 256) & ChrB((Height \ 256) Mod 256)
		Response.BinaryWrite ChrB(0) & ChrB(7) & ChrB(255)

		Dim x, y, i : i = 0
		For y = 0 To Height - 1
			For x = 0 To Width - 1
				If Rnd < Noisy / 100 Then
					Response.BinaryWrite ChrB(1-Graph(x, y))
				ElseIf x * (x-Width) = 0 Or y * (y-Height) = 0 Then
					Response.BinaryWrite ChrB(Graph(x, y))
				ElseIf Graph(x-1, y) = 1 Or Graph(x, y) Or Graph(x, y-1) = 1 Then
					Response.BinaryWrite ChrB(1)
				Else
					Response.BinaryWrite ChrB(0)
				End If

				If (y * Width + x + 1) Mod 126 = 0 Then
					Response.BinaryWrite ChrB(128)
					i = i + 1
				End If
				If (y * Width + x + i + 1) Mod 255 = 0 Then
					If (Width*Height - y * Width - x - 1) > 255 Then
						Response.BinaryWrite ChrB(255)
					Else
						Response.BinaryWrite ChrB(Width * Height Mod 255)
					End If
				End If
			Next
		Next
		Response.BinaryWrite ChrB(128) & ChrB(0) & ChrB(129) & ChrB(0) & ChrB(59)
	End Sub
End Class

Function NumCode(Text_Len)
	Randomize Timer
	Dim s,Int_Temp()
	If Text_Len<1 Or Text_Len>8 Then
		Text_Len = 4
	End If
	ReDim Int_Temp(Text_Len - 1)
	s = ""
	For I = 0 To Text_Len - 1
	   Int_Temp(I) = Int(Rnd * 10)
	   s = s + Mid("0123456789",Int_Temp(I)+1,1)
	Next
	Dim mCode
	Set mCode = New Com_GifCode_Class
	mCode.Count = Text_Len
	mCode.Create(s)
	mCode.Output()
	Set mCode = Nothing
	NumCode = s
End Function

</script>