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用XMLDOM和ADODB.Stream实现base64编码解码实现代码

2010-11-28 00:00 751 查看 
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<title> 用 XMLDOM 和 ADODB.Stream 实现base64编码解码 </title> 
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#textarea1,#textarea3,#textarea5 { background-color: #EEEEEE; } 
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<h3>用 XMLDOM 和 ADODB.Stream 实现base64编码解码</h3> 
<h5>By: CuiXiPing(无心)</h5> 

<h4>1.对文件的base64编码</h4> 

<input type=file name="file1" id="file1" size="50"> 
<input type="button" value="base64编码" onclick="if(!file1.value){alert('请选择文件')}else{textarea1.value=Base64EncodeFile(file1.value)}"> 
<br> 
<textarea id="textarea1" rows="6" cols="80" readOnly></textarea> 

<h4>2.对文本的base64编码</h4> 

<input type="button" value="base64编码" onclick="textarea3.value=Base64EncodeText(textarea2.value)"> 
<br> 
<textarea id="textarea2" rows="4" cols="40">坚决抵制日货</textarea> 
<textarea id="textarea3" rows="4" cols="40" readOnly></textarea> 

<h4>3.对文本的base64解码</h4> 

<input type="button" value="base64解码" onclick="textarea5.value=Base64DecodeText(textarea4.value)"> 
<br> 
<textarea id="textarea4" rows="4" cols="40">vOG+9rXW1sbI1bv1</textarea> 
<textarea id="textarea5" rows="4" cols="40" readOnly></textarea> 

<script language="javaScript"> 
<!-- 
function Base64EncodeFile(fileSpec){ 
var xml_dom = new ActiveXObject("MSXML2.DOMDocument"); 
var ado_stream = new ActiveXObject("ADODB.Stream"); 
var tmpNode = xml_dom.createElement("tmpNode"); 
tmpNode.dataType = "bin.base64"; 

ado_stream.Type = 1; // 1=adTypeBinary 
if(ado_stream.state==0){ // 0=adStateClosed 1=adStateOpen 
ado_stream.Open(); 
} 
ado_stream.LoadFromFile(fileSpec); 
tmpNode.nodeTypedValue = ado_stream.Read(-1); // -1=adReadAll 
ado_stream.Close(); 

return tmpNode.text; 
} 
function Base64EncodeText(TextStr){ 
var xml_dom = new ActiveXObject("MSXML2.DOMDocument"); 
var ado_stream = new ActiveXObject("ADODB.Stream"); 
var tmpNode = xml_dom.createElement("tmpNode"); 
tmpNode.dataType = "bin.base64"; 

ado_stream.Charset = "gb2312"; 
ado_stream.Type = 2; // 1=adTypeBinary 2=adTypeText 
if(ado_stream.state==0){ // 0=adStateClosed 1=adStateOpen 
ado_stream.Open(); 
} 
ado_stream.WriteText(TextStr); 
ado_stream.Position = 0; 
ado_stream.Type = 1; // 1=adTypeBinary 2=adTypeText 
tmpNode.nodeTypedValue = ado_stream.Read(-1); // -1=adReadAll 
ado_stream.Close(); 

return tmpNode.text; 
} 
function Base64DecodeText(Base64Str){ 
var xml_dom = new ActiveXObject("MSXML2.DOMDocument"); 
var ado_stream = new ActiveXObject("ADODB.Stream"); 
var tmpNode = xml_dom.createElement("tmpNode"); 
tmpNode.dataType = "bin.base64"; 
tmpNode.text = Base64Str; 

ado_stream.Charset = "gb2312"; 
ado_stream.Type = 1; // 1=adTypeBinary 2=adTypeText 
ado_stream.Open(); 
ado_stream.Write(tmpNode.nodeTypedValue); 
ado_stream.Position = 0; 
ado_stream.Type = 2; // 1=adTypeBinary 2=adTypeText 
var str = ado_stream.ReadText(-1); // -1=adReadAll 
ado_stream.Close(); 

return str; 
} 
//--> 
</script> 
</body> 
</html>
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