有什么asp图片验证的组件

dhq314 2008-03-31 08:16:31
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Anlige 2008-03-31

<%
Option Explicit
Response.buffer=true
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
Response.Expires = -1
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
Response.ContentType = "Image/bmp"
Randomize
Dim i, ii, iii
Const cOdds = 6 ' 杂点出现的机率
Const cAmount = 10 ' 文字数量
Const cCode = "0123456789abcd"
' 颜色的数据(字符,背景)
Dim vColorData(1)
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(255) ' 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
Response.BinaryWrite vColorData(0)
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
End If
Next
Next
Next
End Sub
%>

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yanniu008 2008-03-31

<%
'生成安全码的函数
function make_randomize(max_len,w_n) 'max_len 生成长度,w_n:0 可能包含字母,1:只为数字
randomize
for intcounter=1 to max_len
whatnext=int((1-0+1)*rnd+w_n)
if whatnext=0 then
upper=122
lower=97
else
upper=57
lower=48
end if
strnewpass=strnewpass & chr(int((upper-lower+1)*rnd)+lower)
next
make_randomize=strnewpass
end function
'safecode=make_randomize(4,0)
'response.Write(safecode)
%>
<%random_num=make_randomize(4,0) '生成4位数字的安全码
session("random_num")=random_num '为什么调用session,没有session的安全码是完全没有意义的。呵呵
Set Jpeg = Server.createObject("Persits.Jpeg") '调用组件
Jpeg.Open Server.MapPath("1.jpg") '打开准备的图片
Jpeg.Canvas.Font.Color = &H006699
Jpeg.Canvas.Font.Family = "Arial Black"
Jpeg.Canvas.Font.Bold = false
Jpeg.Canvas.PrintText 0, -2, random_num
jpeg.save Server.MapPath("random_index.jpg") '保存
%>
 <img src="random_index.jpg" border="0" align="absmiddle">
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yanniu008 2008-03-31
persits.jpeg
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dhq314 2008-03-31
嗯,就是验证码,有这种组件不
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小逗狗 2008-03-31
什么图片验证的,是验证码还是什么,LZ说清楚一点啦
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