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Use XMLDOM and ADODB. Stream to implement base64 encoding and decoding.

Source: Internet
Author: User
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Copy codeThe Code is as follows:
<! Doctype html public "-// W3C // dtd html 4.0 Transitional // EN">
<Html>
<Head>
<Title> base64 encoding and decoding using XMLDOM and ADODB. Stream </title>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
<Style type = "text/css" title = "">
# Textarea1, # textarea3, # textarea5 {background-color: # EEEEEE ;}
</Style>
</Head>

<Body>

<H3> base64 encoding and decoding using XMLDOM and ADODB. Stream <H5> By: CuiXiPing (unintentional)
<H4> 1. base64 encoding of the file
<Input type = file name = "file1" id = "file1" size = "50">
<Input type = "button" value = "base64 encoding" onclick = "if (! File1.value) {alert ('select A file')} else {textarea1.value = Base64EncodeFile (file1.value)} ">
<Br>
<Textarea id = "textarea1" rows = "6" cols = "80" readOnly> </textarea>

<H4> 2. base64 encoding of text
<Input type = "button" value = "base64 encoding" onclick = "textarea3.value = Base64EncodeText (textarea2.value)">
<Br>
<Textarea id = "textarea2" rows = "4" cols = "40"> resolutely resist Japanese goods </textarea>
<Textarea id = "textarea3" rows = "4" cols = "40" readOnly> </textarea>

<H4> 3. base64 Decoding of text
<Input type = "button" value = "base64 decoding" 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>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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