ajax XMLHTTP Post Form时的表单乱码综合解决
时间:2021-03-29 09:43:42|栏目:ASP代码|点击: 次
Part I Post中文内容
先看看E文的表单是怎么提交的:
<SCRIPT language="JavaScript">
strA = "submit1=Submit&text1=scsdfsd";
var oReq = new ActiveXObject("MSXML2.XMLHTTP");
oReq.open("POST","http://ServerName/VDir/TstResult.asp",false);
oReq.setRequestHeader("Content-Length",strA.length);
oReq.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");
oReq.send(strA);
</SCRIPT>
如果把strA = "submit1=Submit&text1=scsdfsd";换成:strA = "submit1=Submit&text1=中文";
你会发现提交上去的东东根本不对,ASP中Request.Form("Text1")根本取不到值。俺用Request.BinaryRead把一个HTML Form中的Post内容写出来看了看,才发现问题――Form提交时也要编码的,编码后的中文是类似于%??%??的转义字符,比如“中文”就被编码为:%D6%D0%CE%C4。呵呵,也怪俺笨,人家CONTENT-TYPE里明明写的清清楚楚――application/x-www-form-urlencoded,urlencoded嘛当然就是这个样子了。既然这样,那我们也知道该怎么办了――自己做转换,代码见下:
Function URLEncoding(vstrIn)
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
strA = URLEncoding("submit1=Submit&text1=中文")
oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
</ScRIPT>
(在这里俺把前面的JavaScript的代码改成了VBScript,不是吃饱了撑的没事干,原因见后)
Part II.正确显示得到的中文内容
OK,如果你在Server端把Form的内容写到数据库/文件的话,你在那里看到的中文毫无问题,但是,假如你想看看Server的Response――问题来了:如果Response的结果不是XML,XMLHTTP.responseXML里当然是不会有东东的,那就用responseText好了,在代码的最后加一句:alert(oReq.responseText) 。看看俺们辛勤劳动的结果。
但是但是.....怎么所有的中文全变成了方格? (我打不出来,有兴趣自己去试,也不用Post,Get一个含有中文的网页就可以发现了。)
原因很简单:XMLHTTP得到Response时假定Response是UTF8编码的,如果Response是XML,那还可以通过encoding来指定编码,但HTML就不行了。(见鬼的GB2312,再次打倒!)所以它把含GB2312编码的HTML当成UTF8格式,不出错才有鬼!
不过好在还有补救的办法:XMLHTTP的responseBody 属性里包含的可是未解码的Resonse――"a raw undecoded bytes as received directly from the server" :),唯一的问题是,responseBody返回的是一个unsigned bytes数组,我们怎么去访问它,怎么把它转换成BSTR?
这就是为什么我在上面把代码改成VBScript的原因――VBScript Can do it,but JavaScript Cannot!
代码见下:
<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
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 bytes2BSTR(vIn)
strReturn = ""
For i = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,i,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode)
Else
NextCharCode = AscB(MidB(vIn,i+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
i = i + 1
End If
Next
bytes2BSTR = strReturn
End Function
strA = URLEncoding("submit1=Submit&text1=中文")
oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
alert bytes2BSTR(oReq.responseBody)
</SSRIPT>
先看看E文的表单是怎么提交的:
复制代码 代码如下:
<SCRIPT language="JavaScript">
strA = "submit1=Submit&text1=scsdfsd";
var oReq = new ActiveXObject("MSXML2.XMLHTTP");
oReq.open("POST","http://ServerName/VDir/TstResult.asp",false);
oReq.setRequestHeader("Content-Length",strA.length);
oReq.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");
oReq.send(strA);
</SCRIPT>
如果把strA = "submit1=Submit&text1=scsdfsd";换成:strA = "submit1=Submit&text1=中文";
你会发现提交上去的东东根本不对,ASP中Request.Form("Text1")根本取不到值。俺用Request.BinaryRead把一个HTML Form中的Post内容写出来看了看,才发现问题――Form提交时也要编码的,编码后的中文是类似于%??%??的转义字符,比如“中文”就被编码为:%D6%D0%CE%C4。呵呵,也怪俺笨,人家CONTENT-TYPE里明明写的清清楚楚――application/x-www-form-urlencoded,urlencoded嘛当然就是这个样子了。既然这样,那我们也知道该怎么办了――自己做转换,代码见下:
复制代码 代码如下:
Function URLEncoding(vstrIn)
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
strA = URLEncoding("submit1=Submit&text1=中文")
oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
</ScRIPT>
(在这里俺把前面的JavaScript的代码改成了VBScript,不是吃饱了撑的没事干,原因见后)
Part II.正确显示得到的中文内容
OK,如果你在Server端把Form的内容写到数据库/文件的话,你在那里看到的中文毫无问题,但是,假如你想看看Server的Response――问题来了:如果Response的结果不是XML,XMLHTTP.responseXML里当然是不会有东东的,那就用responseText好了,在代码的最后加一句:alert(oReq.responseText) 。看看俺们辛勤劳动的结果。
但是但是.....怎么所有的中文全变成了方格? (我打不出来,有兴趣自己去试,也不用Post,Get一个含有中文的网页就可以发现了。)
原因很简单:XMLHTTP得到Response时假定Response是UTF8编码的,如果Response是XML,那还可以通过encoding来指定编码,但HTML就不行了。(见鬼的GB2312,再次打倒!)所以它把含GB2312编码的HTML当成UTF8格式,不出错才有鬼!
不过好在还有补救的办法:XMLHTTP的responseBody 属性里包含的可是未解码的Resonse――"a raw undecoded bytes as received directly from the server" :),唯一的问题是,responseBody返回的是一个unsigned bytes数组,我们怎么去访问它,怎么把它转换成BSTR?
这就是为什么我在上面把代码改成VBScript的原因――VBScript Can do it,but JavaScript Cannot!
代码见下:
复制代码 代码如下:
<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
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 bytes2BSTR(vIn)
strReturn = ""
For i = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,i,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode)
Else
NextCharCode = AscB(MidB(vIn,i+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
i = i + 1
End If
Next
bytes2BSTR = strReturn
End Function
strA = URLEncoding("submit1=Submit&text1=中文")
oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
alert bytes2BSTR(oReq.responseBody)
</SSRIPT>
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本文标题:ajax XMLHTTP Post Form时的表单乱码综合解决
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