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无组件生成BMP验证码
Call Com_CreatValidCode("ValidCode")

Sub Com_CreatValidCode(pSN)

\\\'Author: Layen
\\\'QQ: 84815733
\\\'E-mail: support@ssaw.net

\\\' 禁止缓存
Response.Expires = -9999
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
Response.ContentType = "Image/BMP"

Randomize

Dim i, ii, iii

Const cOdds = 8 \\\' 杂点出现的机率
Const cAmount = 36 \\\' 文字数量
Const cCode = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"

\\\' 颜色的数据(字符，背景)
Dim vColorData(1)
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(0) \\\' 蓝0，绿0，红0（黑色）
vColorData(1) = ChrB(250) & ChrB(236) & ChrB(211) \\\' 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(35)
vNumberData(0) = "111000011111011110111101111011110100101111010010111101
0010111101001011110111101111011110111110000111"
vNumberData(1) = "111101111111000111111111011111111101111111110111111111
0111111111011111111101111111110111111100000111"
vNumberData(2) = "111000011111011110111101111011111111101111111101111111
1011111111011111111011111111011110111100000011"
vNumberData(3) = "111000011111011110111101111011111111011111110011111111
1101111111111011110111101111011110111110000111"
vNumberData(4) = "111110111111111011111111001111111010111111011011111101
1011111100000011111110111111111011111111000011"
vNumberData(5) = "110000001111011111111101111111110100011111001110111111
1110111111111011110111101111011110111110000111"
vNumberData(6) = "111100011111101110111101111111110111111111010001111100
1110111101111011110111101111011110111110000111"
vNumberData(7) = "110000001111011101111101110111111110111111111011111111
0111111111011111111101111111110111111111011111"
vNumberData(8) = "111000011111011110111101111011110111101111100001111110
1101111101111011110111101111011110111110000111"
vNumberData(9) = "111000111111011101111101111011110111101111011100111110
0010111111111011111111101111011101111110001111"
vNumberData(10) = "11110111111111011111111010111111101011111110101111111
01011111100000111110111011111011101111000100011"
vNumberData(11) = "10000001111101111011110111101111011101111100001111110
11101111101111011110111101111011110111000000111"
vNumberData(12) = "11100000111101111011101111101110111111111011111111101
11111111011111111101111101111011101111110001111"
vNumberData(13) = "10000011111101110111110111101111011110111101111011110
11110111101111011110111101111011101111000001111"
vNumberData(14) = "10000001111101111011110110111111011011111100001111110
11011111101101111110111111111011110111000000111"
vNumberData(15) = "10000001111101111011110110111111011011111100001111110
11011111101101111110111111111011111111000111111"
vNumberData(16) = "11100001111101110111101111011110111111111011111111101
11111111011100011101111011111011101111110001111"
vNumberData(17) = "10001000111101110111110111011111011101111100000111110
11101111101110111110111011111011101111000100011"
vNumberData(18) = "11000001111111011111111101111111110111111111011111111
10111111111011111111101111111110111111100000111"
vNumberData(19) = "11100000111111101111111110111111111011111111101111111
11011111111101111111110111110111011111000011111"
vNumberData(20) = "10001000111101110111110110111111010111111100011111110
10111111101101111110110111111011101111000100011"
vNumberData(21) = "10001111111101111111110111111111011111111101111111110
11111111101111111110111111111011110111000000011"
vNumberData(22) = "10001000111100100111110010011111001001111101010111110
10101111101010111110101011111010101111001010011"
vNumberData(23) = "10001000111100110111110011011111010101111101010111110
10101111101100111110110011111011001111000110111"
vNumberData(24) = "11100011111101110111101111101110111110111011111011101
11110111011111011101111101111011101111110001111"
vNumberData(25) = "10000001111101111011110111101111011110111100000111110
11111111101111111110111111111011111111000111111"
vNumberData(26) = "11100011111101110111101111101110111110111011111011101
11110111011111011101001101111011001111110001011"
vNumberData(27) = "10000011111101110111110111011111011101111100001111110
10111111101101111110110111111011101111000110011"
vNumberData(28) = "11100000111101111011110111101111011111111110011111111
11001111111111011110111101111011110111100000111"
vNumberData(29) = "10000000111011011011111101111111110111111111011111111
10111111111011111111101111111110111111110001111"
vNumberData(30) = "10001000111101110111110111011111011101111101110111110
11101111101110111110111011111011101111110001111"
vNumberData(31) = "10001000111101110111110111011111011101111110101111111
01011111110101111111010111111110111111111011111"
vNumberData(32) = "10010100111101010111110101011111010101111101010111110
01001111110101111111010111111101011111110101111"
vNumberData(33) = "10001000111101110111111010111111101011111111011111111
10111111110101111111010111111011101111000100011"
vNumberData(34) = "10001000111101110111110111011111101011111110101111111
10111111111011111111101111111110111111110001111"
vNumberData(35) = "11000000111101110111111111011111111011111111101111111
10111111111011111111011111111101110111100000011"

\\\' 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
Response.BinaryWrite vColorData(0)
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
End If
Next
Next
Next

End Sub

返回类别: 教程
上一教程: 用ASP连接各种数据库的方式
下一教程: 浅谈ASP编程中的测试打印、有效性检查及错误处理

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