留言继续被恶意刷屏，添加公式验证码
本站 (2017-09-27 17:27:28) 浏览:537 评论:1
网站留言加了验证码之后，仍然被恶意留言，不停刷屏，不知道加了“加法数学公式图片验证码”怎么样，继续检验吧
验证码程序
<%@CodePage="65001"%>
<%
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
' 禁止缓存
Response.Expires = -9999
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
'Response.C
Randomize
Dim i, ii, iii
Const cOdds = 4 ' 杂点出现的机率
Const cAmount = 13 ' 文字数量
Const cCode = "0123456789+=?"
' 颜色的数据(字符，背景)
Dim vColorData(1),vColorRandom(10)
'vColorData(0) = ChrB(Int(Rnd*155)+100) & ChrB(Int(Rnd*155)+100) & ChrB(Int(Rnd*155)+100) ' 蓝0，绿0，红0（黑色）
vColorRandom(0)=ChrB(150) & ChrB(0) & ChrB(0)
vColorRandom(1)=ChrB(0) & ChrB(150) & ChrB(0)
vColorRandom(2)=ChrB(0) & ChrB(0) & ChrB(150)
vColorRandom(3)=ChrB(0) & ChrB(50) & ChrB(150)
vColorRandom(4)=ChrB(150) & ChrB(50) & ChrB(0)
vColorRandom(5)=ChrB(150) & ChrB(0) & ChrB(150)
vColorRandom(6)=ChrB(150) & ChrB(100) & ChrB(10)
vColorRandom(7)=ChrB(150) & ChrB(40) & ChrB(120)
vColorRandom(8)=ChrB(150) & ChrB(0) & ChrB(250)
vColorRandom(9)=ChrB(100) & ChrB(100) & ChrB(100)
vColorRandom(10)=ChrB(50) & ChrB(50) & ChrB(50)
vColorData(0) = vColorRandom(0)
vColorData(1) = ChrB(250) & ChrB(250) & ChrB(255) '背景色 蓝250，绿236，红211（浅蓝色）
' 随机产生字符
Dim vCode(6),vCodes,vCodeColors(6)
For i = 0 To 6
vCodeColors(i)=vColorRandom(Int(Rnd * 10))
Next
vCode(0) = Int(Rnd*8)+1
vCode(1) = Int(Rnd*9)
vCode(2) = 10
vCode(3) = Int(Rnd*8)+1
vCode(4) = Int(Rnd*9)
vCode(5) = 11
vCode(6) = 12
Session(pSN) = vCode(0)*10+vCode(1)+vCode(3)*10+vCode(4) '记录入Session
' 字符的数据
Dim vNumberData(12)
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"
vNumberData(10) = "1111111111111101111111110111111111011111100000001111110111111111011111111101111111110111111111111111"
vNumberData(11) = "1111111111111111111111111111111000000001111111111111111111111000000001111111111111111111111111111111"
vNumberData(12) = "1110000111110011001111011110111111111011111111001111111001111111001111111111111111110011111111001111"
' 输出图像文件头
Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(166) & ChrB(8) & 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(72) & 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(112) & ChrB(8) &_
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 6 ' 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
vColorData(0)=vCodeColors(ii)
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
Response.BinaryWrite vColorData(1) & vColorData(1)
Next
End Sub
%>
调用代码
<img src="checkcode3.asp" mce_src="checkcode3.asp" align='absmiddle' border='0'>
提交验证：
if cstr(session("GetCode"))<>cstr(request("txt_check")) then
response.write "<script language='javascript'>"
response.write "alert('验证码不正确,请重新输入！');"
response.write "location.href='javascript:history.go(-1)';"
response.write "</script>"
response.End()
end if
验证码程序
<%@CodePage="65001"%>
<%
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
' 禁止缓存
Response.Expires = -9999
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
'Response.C
Randomize
Dim i, ii, iii
Const cOdds = 4 ' 杂点出现的机率
Const cAmount = 13 ' 文字数量
Const cCode = "0123456789+=?"
' 颜色的数据(字符，背景)
Dim vColorData(1),vColorRandom(10)
'vColorData(0) = ChrB(Int(Rnd*155)+100) & ChrB(Int(Rnd*155)+100) & ChrB(Int(Rnd*155)+100) ' 蓝0，绿0，红0（黑色）
vColorRandom(0)=ChrB(150) & ChrB(0) & ChrB(0)
vColorRandom(1)=ChrB(0) & ChrB(150) & ChrB(0)
vColorRandom(2)=ChrB(0) & ChrB(0) & ChrB(150)
vColorRandom(3)=ChrB(0) & ChrB(50) & ChrB(150)
vColorRandom(4)=ChrB(150) & ChrB(50) & ChrB(0)
vColorRandom(5)=ChrB(150) & ChrB(0) & ChrB(150)
vColorRandom(6)=ChrB(150) & ChrB(100) & ChrB(10)
vColorRandom(7)=ChrB(150) & ChrB(40) & ChrB(120)
vColorRandom(8)=ChrB(150) & ChrB(0) & ChrB(250)
vColorRandom(9)=ChrB(100) & ChrB(100) & ChrB(100)
vColorRandom(10)=ChrB(50) & ChrB(50) & ChrB(50)
vColorData(0) = vColorRandom(0)
vColorData(1) = ChrB(250) & ChrB(250) & ChrB(255) '背景色 蓝250，绿236，红211（浅蓝色）
' 随机产生字符
Dim vCode(6),vCodes,vCodeColors(6)
For i = 0 To 6
vCodeColors(i)=vColorRandom(Int(Rnd * 10))
Next
vCode(0) = Int(Rnd*8)+1
vCode(1) = Int(Rnd*9)
vCode(2) = 10
vCode(3) = Int(Rnd*8)+1
vCode(4) = Int(Rnd*9)
vCode(5) = 11
vCode(6) = 12
Session(pSN) = vCode(0)*10+vCode(1)+vCode(3)*10+vCode(4) '记录入Session
' 字符的数据
Dim vNumberData(12)
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"
vNumberData(10) = "1111111111111101111111110111111111011111100000001111110111111111011111111101111111110111111111111111"
vNumberData(11) = "1111111111111111111111111111111000000001111111111111111111111000000001111111111111111111111111111111"
vNumberData(12) = "1110000111110011001111011110111111111011111111001111111001111111001111111111111111110011111111001111"
' 输出图像文件头
Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(166) & ChrB(8) & 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(72) & 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(112) & ChrB(8) &_
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 6 ' 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
vColorData(0)=vCodeColors(ii)
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
Response.BinaryWrite vColorData(1) & vColorData(1)
Next
End Sub
%>
调用代码
<img src="checkcode3.asp" mce_src="checkcode3.asp" align='absmiddle' border='0'>
提交验证：
if cstr(session("GetCode"))<>cstr(request("txt_check")) then
response.write "<script language='javascript'>"
response.write "alert('验证码不正确,请重新输入！');"
response.write "location.href='javascript:history.go(-1)';"
response.write "</script>"
response.End()
end if
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以下是网友对 留言继续被恶意刷屏，添加公式验证码 的评论：
1. admin (2017-09-28 11:12:37)
再增加一项，判断来路
server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))
'Response.Write(server_v1)
server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))
'Response.Write(server_v2)
if mid(server_v1,8,len(server_v2))<>server_v2 then
Response.Write("<script language=javascript>alert('禁止外部提交数据！');</script>")
response.end
end if
server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))
'Response.Write(server_v1)
server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))
'Response.Write(server_v2)
if mid(server_v1,8,len(server_v2))<>server_v2 then
Response.Write("<script language=javascript>alert('禁止外部提交数据！');</script>")
response.end
end if
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