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defunkt/binary.html

Forked from ozmm/binary.html
Created October 18, 2012 15:47
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  1. defunkt revised this gist Dec 11, 2012. 1 changed file with 1 addition and 0 deletions.
    1 change: 1 addition & 0 deletions binary.html
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    Original file line number Diff line number Diff line change
    @@ -1,4 +1,5 @@
    <!-- http://emilsblog.lerch.org/2009/07/javascript-hacks-using-xhr-to-load.html -->

    <html5>
    <head>
    <script language="vbscript">
  2. defunkt revised this gist Oct 18, 2012. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion binary.html
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    <!-- http://emilsblog.lerch.org/2009/07/javascript-hacks-using-xhr-to-load.html -->
    <html>
    <html5>
    <head>
    <script language="vbscript">
    Function BinaryArrayToAscCSV( aBytes )
  3. @jschementi jschementi revised this gist Mar 3, 2010. 1 changed file with 3 additions and 2 deletions.
    5 changes: 3 additions & 2 deletions binary.html
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    <!-- http://emilsblog.lerch.org/2009/07/javascript-hacks-using-xhr-to-load.html -->
    <html>
    <head>
    <script language="vbscript">
    @@ -149,8 +150,8 @@
    </head>
    <body>
    <script type="text/javascript">
    alert(LoadBinaryResource("http://localhost/pycon2010/unittest/Lib.zip"))
    alert(LoadBinaryResourceAsBase64("http://localhost/pycon2010/unittest/Lib.zip"))
    alert(LoadBinaryResource("foo.zip"))
    alert(LoadBinaryResourceAsBase64("foo.zip"))
    </script>
    </body>
    </html>
  4. @jschementi jschementi created this gist Mar 3, 2010.
    156 changes: 156 additions & 0 deletions binary.html
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    <html>
    <head>
    <script language="vbscript">
    Function BinaryArrayToAscCSV( aBytes )
    Dim j, sOutput
    sOutput = "BinaryArrayToAscCSV"
    For j = 1 to LenB(aBytes)
    sOutput= sOutput & AscB( MidB(aBytes,j,1) )
    sOutput= sOutput & ","
    Next
    BinaryArrayToAscCSV = sOutput
    End Function
    </script>

    <script type="text/javascript">
    Base64 = {
    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    encodeBinaryArrayAsString : function(input) {
    var ascArr;
    var output = "";
    var bytebuffer;
    var encodedCharIndexes = new Array(4);

    var inx = 0;
    ascArr = input.substring("BinaryArrayToAscCSV".length, input.length - 1).split(',');
    while(inx < ascArr.length) {
    // Fill byte buffer array
    bytebuffer = new Array(3);
    for(jnx = 0; jnx < bytebuffer.length; jnx++) {
    if(inx < ascArr.length) {
    bytebuffer[jnx] = parseInt(ascArr[inx++]);
    } else {
    bytebuffer[jnx] = 0;
    }
    }

    // Get each encoded character, 6 bits at a time
    // index 1: first 6 bits
    encodedCharIndexes[0] = bytebuffer[0] >> 2;
    // index 2: second 6 bits (2 least significant bits from input byte 1 + 4 most significant bits from byte 2)
    encodedCharIndexes[1] = ((bytebuffer[0] & 0x3) << 4) | (bytebuffer[1] >> 4);
    // index 3: third 6 bits (4 least significant bits from input byte 2 + 2 most significant bits from byte 3)
    encodedCharIndexes[2] = ((bytebuffer[1] & 0x0f) << 2) | (bytebuffer[2] >> 6);
    // index 3: forth 6 bits (6 least significant bits from input byte 3)
    encodedCharIndexes[3] = bytebuffer[2] & 0x3f;

    // Determine whether padding happened, and adjust accordingly
    paddingBytes = inx - (ascArr.length - 1);
    switch(paddingBytes) {
    case 2:
    // Set last 2 characters to padding char
    encodedCharIndexes[3] = 64;
    encodedCharIndexes[2] = 64;
    break;
    case 1:
    // Set last character to padding char
    encodedCharIndexes[3] = 64;
    break;
    default:
    break; // No padding - proceed
    }
    // Now we will grab each appropriate character out of our keystring
    // based on our index array and append it to the output string
    for(jnx = 0; jnx < encodedCharIndexes.length; jnx++) {
    output += this._keyStr.charAt(encodedCharIndexes[jnx]);
    }
    }
    return output;
    },

    encodeBinary : function(input){
    var output = "";
    var bytebuffer;
    var encodedCharIndexes = new Array(4);
    var inx = 0;
    var paddingBytes = 0;

    while(inx < input.length){
    // Fill byte buffer array
    bytebuffer = new Array(3);
    for(jnx = 0; jnx < bytebuffer.length; jnx++) {
    if(inx < input.length) {
    bytebuffer[jnx] = input.charCodeAt(inx++) & 0xff; // throw away high-order byte, as documented at: https://developer.mozilla.org/En/Using_XMLHttpRequest#Handling_binary_data
    } else {
    bytebuffer[jnx] = 0;
    }
    }

    // Get each encoded character, 6 bits at a time
    // index 1: first 6 bits
    encodedCharIndexes[0] = bytebuffer[0] >> 2;
    // index 2: second 6 bits (2 least significant bits from input byte 1 + 4 most significant bits from byte 2)
    encodedCharIndexes[1] = ((bytebuffer[0] & 0x3) << 4) | (bytebuffer[1] >> 4);
    // index 3: third 6 bits (4 least significant bits from input byte 2 + 2 most significant bits from byte 3)
    encodedCharIndexes[2] = ((bytebuffer[1] & 0x0f) << 2) | (bytebuffer[2] >> 6);
    // index 3: forth 6 bits (6 least significant bits from input byte 3)
    encodedCharIndexes[3] = bytebuffer[2] & 0x3f;

    // Determine whether padding happened, and adjust accordingly
    paddingBytes = inx - (input.length - 1);
    switch(paddingBytes){
    case 2:
    // Set last 2 characters to padding char
    encodedCharIndexes[3] = 64;
    encodedCharIndexes[2] = 64;
    break;
    case 1:
    // Set last character to padding char
    encodedCharIndexes[3] = 64;
    break;
    default:
    break; // No padding - proceed
    }
    // Now we will grab each appropriate character out of our keystring
    // based on our index array and append it to the output string
    for(jnx = 0; jnx < encodedCharIndexes.length; jnx++) {
    output += this._keyStr.charAt(encodedCharIndexes[jnx]);
    }
    }
    return output;
    }
    };
    </script>

    <script type="text/javascript">
    LoadBinaryResource = function(url) {
    var req = new XMLHttpRequest();
    req.open('GET', url, false);
    if (req.overrideMimeType) {
    req.overrideMimeType('text/plain; charset=x-user-defined');
    }
    req.send(null);
    if (req.status != 200) return '';
    if (typeof(req.responseBody) !== 'undefined') return BinaryArrayToAscCSV(req.responseBody);
    return req.responseText;
    }

    LoadBinaryResourceAsBase64 = function(url) {
    var data = LoadBinaryResource(url);
    if (data.indexOf("BinaryArrayToAscCSV") !== -1) {
    return Base64.encodeBinaryArrayAsString(data);
    } else {
    return Base64.encodeBinary(data);
    }
    }
    </script>
    </head>
    <body>
    <script type="text/javascript">
    alert(LoadBinaryResource("http://localhost/pycon2010/unittest/Lib.zip"))
    alert(LoadBinaryResourceAsBase64("http://localhost/pycon2010/unittest/Lib.zip"))
    </script>
    </body>
    </html>