不知道为什么现在各大搜索引擎编码居然不一样.当然不是gb2312就是utf-8了.编码问题是比较头疼的问题…头疼的不要命…
 
我们获得关键词,一般是通过来访页面的url进行分析的.比如
 
http://www.google.com/search?hl=zh-CN&q=%E5%AD%A4%E7%8B%AC&lr=
 
各位肯定知道这个是通过urlencode编码的.
 
我们得到其中的信息,需要进行2步.第一步是进行urldecode,在我们普通参数活得的时候,这个是由asp自己来进行的,但是现在我们不得不进行手工解码.
 
网上函数很多,但都是针对于gb2312页面解gb2312.utf-8的.对于这个,我们可以很轻松的先进行解码,然后根据搜索引擎判断它的编码,如果是utf-8就再转换为gb2312.
 
但是由于我的网站是utf-8页面的.而utf-8页面我找到的只有解utf-8字符的urldecode编码的.在这里停顿了很久,最后我只能用最糟糕的方法,把拆分出来的关键词用xmlhttp提交到一个gb2312的asp页面,然后活得乱码(gb2312)后再进行gb2312 to utf-8的转换.
 
下面主要实现代码.
 
Public Function GetSearchKeyword(RefererUrl) '搜索关键词
 if RefererUrl="" or len(RefererUrl)<1 then exit function
    
  on error resume next
  
  Dim re
  Set re = New RegExp
  re.IgnoreCase = True
  re.Global = True
  Dim a,b,j
  '模糊查找关键词，此方法速度较快，范围也较大
  re.Pattern = "(word=([^&]*)|q=([^&]*)|p=([^&]*)|query=([^&]*)|name=([^&]*)|_searchkey=([^&]*)|baidu.*?w=([^&]*))"
  Set a = re.Execute(RefererUrl)
  If a.Count>0 then
   Set b = a(a.Count-1).SubMatches
   For j=1 to b.Count
    If Len(b(j))>0 then
     if instr(1,RefererUrl,"google",1) then
       GetSearchKeyword=Trim(U8Decode(b(j)))
      elseif instr(1,refererurl,"yahoo",1) then
       GetSearchKeyword=Trim(U8Decode(b(j)))
      elseif instr(1,refererurl,"yisou",1) then
       GetSearchKeyword=Trim(getkey(b(j)))
      elseif instr(1,refererurl,"3721",1) then
       GetSearchKeyword=Trim(getkey(b(j)))
      else
       GetSearchKeyword=Trim(getkey(b(j)))
     end if
     Exit Function
    end if
   Next
  End If
  if err then
  err.clear
  GetSearchKeyword = RefererUrl
  else
  GetSearchKeyword = ""  
  end if  
 End Function
 
 
 Function URLEncoding(vstrIn)
  dim strReturn,i,thischr
    strReturn = ""
    For i = 1 To Len(vstrIn)
        ThisChr = Mid(vStrIn,i,1)
        If Abs(Asc(ThisChr)) < &HFF Then
            strReturn = strReturn & ThisChr
        Else
            innerCode = Asc(ThisChr)
            If innerCode < 0 Then
                innerCode = innerCode + &H10000
            End If
            Hight8 = (innerCode  And &HFF00) &HFF
            Low8 = innerCode And &HFF
            strReturn = strReturn & "%" & Hex(Hight8) &  "%" & Hex(Low8)
        End If
    Next
    URLEncoding = strReturn
End Function
function getkey(key)
dim oReq
set oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://"&WebUrl&"/system/ShowGb2312XML.asp?a="&key,false
oReq.send
getkey=UTF2GB(oReq.responseText)
end function
function chinese2unicode(Str)
  dim i
  dim Str_one
  dim Str_unicode
  for i=1 to len(Str)
    Str_one=Mid(Str,i,1)
    Str_unicode=Str_unicode&chr(38)
    Str_unicode=Str_unicode&chr(35)
    Str_unicode=Str_unicode&chr(120)
    Str_unicode=Str_unicode& Hex(ascw(Str_one))
    Str_unicode=Str_unicode&chr(59)
  next
  Response.Write Str_unicode
end function    
 
function UTF2GB(UTFStr)
Dim dig,GBSTR
    for Dig=1 to len(UTFStr)
        if mid(UTFStr,Dig,1)="%" then
            if len(UTFStr) >= Dig+8 then
                GBStr=GBStr & ConvChinese(mid(UTFStr,Dig,9))
                Dig=Dig+8
            else
                GBStr=GBStr & mid(UTFStr,Dig,1)
            end if
        else
            GBStr=GBStr & mid(UTFStr,Dig,1)
        end if
    next
    UTF2GB=GBStr
end function
 
 
function ConvChinese(x)
dim a,i,j,DigS,Unicode
    A=split(mid(x,2),"%")
    i=0
    j=0
   
    for i=0 to ubound(A)
        A(i)=c16to2(A(i))
    next
       
    for i=0 to ubound(A)-1
        DigS=instr(A(i),"0")
        Unicode=""
        for j=1 to DigS-1
            if j=1 then
                A(i)=right(A(i),len(A(i))-DigS)
                Unicode=Unicode & A(i)
            else
                i=i+1
                A(i)=right(A(i),len(A(i))-2)
                Unicode=Unicode & A(i)
            end if
        next
       
        if len(c2to16(Unicode))=4 then
            ConvChinese=ConvChinese & chrw(int("&H" & c2to16(Unicode)))
        else
            ConvChinese=ConvChinese & chr(int("&H" & c2to16(Unicode)))
        end if
    next
end function
 
function U8Decode(enStr)
  &%