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D:\Temp\找图片图标\验证码\Code_3.asp 编码GB2312 <%
'************************************************************
'作者：云端
'版权：源代码公开，各种用途均可免费使用。
'创建：2013-11-16
'联系：QQ313801120 交流群35915100 邮箱313801120@qq.com
'* Powered By 云端
'************************************************************
Option Explicit
Response. Buffer = True
Response. Expires = -1
Response. ExpiresAbsolute = Now() - 1
Response. AddHeader "cache-control", "no-cache"
Response. AddHeader "Pragma", "no-cache"
Response. ContentType = "Image/BMP"
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
Randomize
Dim I, II, III
Const cOdds = 3 '杂点出现的机率
Const cAmount = 10 '文字数量
Const cCode = "0123456789"
'颜色的数据(字符，背景)
Dim vColorData(1)
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(211) '蓝0，绿0，红0（黑色）
vColorData(1) = ChrB(255) & ChrB(255) & ChrB(255) '蓝250，绿236，红211（浅蓝色）
'随机产生字符
Dim vCode(4), vCodes
For I = 0 To 3
vCode(I) = Int(Rnd * cAmount)
vCodes = vCodes & Mid(cCode, vCode(I) + 1, 1)
Next
Session(pSN) = vCodes '记录入Session
'字符的数据
Dim vNumberData(9)
vNumberData(0) = "1110000111110111101111011110111101001011110100101111010010111101001011110111101111011110111110000111"
vNumberData(1) = "1111011111110001111111110111111111011111111101111111110111111111011111111101111111110111111100000111"
vNumberData(2) = "1110000111110111101111011110111111111011111111011111111011111111011111111011111111011110111100000011"
vNumberData(3) = "1110000111110111101111011110111111110111111100111111111101111111111011110111101111011110111110000111"
vNumberData(4) = "1111101111111110111111110011111110101111110110111111011011111100000011111110111111111011111111000011"
vNumberData(5) = "1100000011110111111111011111111101000111110011101111111110111111111011110111101111011110111110000111"
vNumberData(6) = "1111000111111011101111011111111101111111110100011111001110111101111011110111101111011110111110000111"
vNumberData(7) = "1100000011110111011111011101111111101111111110111111110111111111011111111101111111110111111111011111"
vNumberData(8) = "1110000111110111101111011110111101111011111000011111101101111101111011110111101111011110111110000111"
vNumberData(9) = "1110001111110111011111011110111101111011110111001111100010111111111011111111101111011101111110001111"
'输出图像文件头
Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(230) & ChrB(4) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(0) & ChrB(0) & ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & _
ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(10) & ChrB(0) & _
ChrB(0) & ChrB(0) & ChrB(1) & ChrB(0)
'输出图像信息头
Response.BinaryWrite ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(176) & ChrB(4) & _
ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & _
ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(0) & ChrB(0)
For I = 9 To 0 Step - 1 '历经所有行
For II = 0 To 3 '历经所有字
For III = 1 To 10 '历经所有像素
'逐行、逐字、逐像素地输出图像数据
If Rnd * 99 + 1 < cOdds Then '随机生成杂点
If Mid(vNumberData(vCode(II)), I * 10 + III, 1) Then
Response.BinaryWrite vColorData(0)
Else
Response.BinaryWrite vColorData(1)
End If
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(II)), I * 10 + III, 1))
End If
Next
Next
Next
End Sub
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