使用jscript实现二进制读写脚本代码_javascript技巧

因此，这里是一个很好的方式访问的二进制文件从JScript的。如果您要访问的这个对象从VBScript中，然后把它放在一个SWF文件。此对象已经被用于在愤怒将文件上载到Web服务，并已被证明是好的和快速的文件，在0-10 MB的地区。/** This is a fairly well optimized object which alows
访问的二进制文件从JScript的在Windows
*作业系统。
*该文件的末尾是小的一套测试，以显示它如何
*用。您将需要adodb 2.5或更高版本。
*这将是使上最2000年机器和所有XP或更高
*机器。
*
*版权：博士亚历山大j特纳-保留所有权利。
*请随时与使用此代码在任何您喜欢的方式
*只要您一个参考的地方，在评论
*我写的。
function BinaryFile(name)
{
var adTypeBinary = 1
var adTypeText = 2
var adSaveCreateOverWrite = 2
// The trick - this is the 'old fassioned' not translation page
// It lest javascript use strings to act like raw octets
var codePage='437';

this.path=name;

var forward = new Array();
var backward = new Array();

// Note - for better performance I should preconvert these hex
// definitions to decimal - at some point :-) - AJT
forward['80'] = '00C7';
forward['81'] = '00FC';
forward['82'] = '00E9';
forward['83'] = '00E2';
forward['84'] = '00E4';
forward['85'] = '00E0';
forward['86'] = '00E5';
forward['87'] = '00E7';
forward['88'] = '00EA';
forward['89'] = '00EB';
forward['8A'] = '00E8';
forward['8B'] = '00EF';
forward['8C'] = '00EE';
forward['8D'] = '00EC';
forward['8E'] = '00C4';
forward['8F'] = '00C5';
forward['90'] = '00C9';
forward['91'] = '00E6';
forward['92'] = '00C6';
forward['93'] = '00F4';
forward['94'] = '00F6';
forward['95'] = '00F2';
forward['96'] = '00FB';
forward['97'] = '00F9';
forward['98'] = '00FF';
forward['99'] = '00D6';
forward['9A'] = '00DC';
forward['9B'] = '00A2';
forward['9C'] = '00A3';
forward['9D'] = '00A5';
forward['9E'] = '20A7';
forward['9F'] = '0192';
forward['A0'] = '00E1';
forward['A1'] = '00ED';
forward['A2'] = '00F3';
forward['A3'] = '00FA';
forward['A4'] = '00F1';
forward['A5'] = '00D1';
forward['A6'] = '00AA';
forward['A7'] = '00BA';
forward['A8'] = '00BF';
forward['A9'] = '2310';
forward['AA'] = '00AC';
forward['AB'] = '00BD';
forward['AC'] = '00BC';
forward['AD'] = '00A1';
forward['AE'] = '00AB';
forward['AF'] = '00BB';
forward['B0'] = '2591';
forward['B1'] = '2592';
forward['B2'] = '2593';
forward['B3'] = '2502';
forward['B4'] = '2524';
forward['B5'] = '2561';
forward['B6'] = '2562';
forward['B7'] = '2556';
forward['B8'] = '2555';
forward['B9'] = '2563';
forward['BA'] = '2551';
forward['BB'] = '2557';
forward['BC'] = '255D';
forward['BD'] = '255C';
forward['BE'] = '255B';
forward['BF'] = '2510';
forward['C0'] = '2514';
forward['C1'] = '2534';
forward['C2'] = '252C';
forward['C3'] = '251C';
forward['C4'] = '2500';
forward['C5'] = '253C';
forward['C6'] = '255E';
forward['C7'] = '255F';
forward['C8'] = '255A';
forward['C9'] = '2554';
forward['CA'] = '2569';
forward['CB'] = '2566';
forward['CC'] = '2560';
forward['CD'] = '2550';
forward['CE'] = '256C';
forward['CF'] = '2567';
forward['D0'] = '2568';
forward['D1'] = '2564';
forward['D2'] = '2565';
forward['D3'] = '2559';
forward['D4'] = '2558';
forward['D5'] = '2552';
forward['D6'] = '2553';
forward['D7'] = '256B';
forward['D8'] = '256A';
forward['D9'] = '2518';
forward['DA'] = '250C';
forward['DB'] = '2588';
forward['DC'] = '2584';
forward['DD'] = '258C';
forward['DE'] = '2590';
forward['DF'] = '2580';
forward['E0'] = '03B1';
forward['E1'] = '00DF';
forward['E2'] = '0393';
forward['E3'] = '03C0';
forward['E4'] = '03A3';
forward['E5'] = '03C3';
forward['E6'] = '00B5';
forward['E7'] = '03C4';
forward['E8'] = '03A6';
forward['E9'] = '0398';
forward['EA'] = '03A9';
forward['EB'] = '03B4';
forward['EC'] = '221E';
forward['ED'] = '03C6';
forward['EE'] = '03B5';
forward['EF'] = '2229';
forward['F0'] = '2261';
forward['F1'] = '00B1';
forward['F2'] = '2265';
forward['F3'] = '2264';
forward['F4'] = '2320';
forward['F5'] = '2321';
forward['F6'] = '00F7';
forward['F7'] = '2248';
forward['F8'] = '00B0';
forward['F9'] = '2219';
forward['FA'] = '00B7';
forward['FB'] = '221A';
forward['FC'] = '207F';
forward['FD'] = '00B2';
forward['FE'] = '25A0';
forward['FF'] = '00A0';
backward['C7'] = '80';
backward['FC'] = '81';
backward['E9'] = '82';
backward['E2'] = '83';
backward['E4'] = '84';
backward['E0'] = '85';
backward['E5'] = '86';
backward['E7'] = '87';
backward['EA'] = '88';
backward['EB'] = '89';
backward['E8'] = '8A';
backward['EF'] = '8B';
backward['EE'] = '8C';
backward['EC'] = '8D';
backward['C4'] = '8E';
backward['C5'] = '8F';
backward['C9'] = '90';
backward['E6'] = '91';
backward['C6'] = '92';
backward['F4'] = '93';
backward['F6'] = '94';
backward['F2'] = '95';
backward['FB'] = '96';
backward['F9'] = '97';
backward['FF'] = '98';
backward['D6'] = '99';
backward['DC'] = '9A';
backward['A2'] = '9B';
backward['A3'] = '9C';
backward['A5'] = '9D';
backward['20A7'] = '9E';
backward['192'] = '9F';
backward['E1'] = 'A0';
backward['ED'] = 'A1';
backward['F3'] = 'A2';
backward['FA'] = 'A3';
backward['F1'] = 'A4';
backward['D1'] = 'A5';
backward['AA'] = 'A6';
backward['BA'] = 'A7';
backward['BF'] = 'A8';
backward['2310'] = 'A9';
backward['AC'] = 'AA';
backward['BD'] = 'AB';
backward['BC'] = 'AC';
backward['A1'] = 'AD';
backward['AB'] = 'AE';
backward['BB'] = 'AF';
backward['2591'] = 'B0';
backward['2592'] = 'B1';
backward['2593'] = 'B2';
backward['2502'] = 'B3';
backward['2524'] = 'B4';
backward['2561'] = 'B5';
backward['2562'] = 'B6';
backward['2556'] = 'B7';
backward['2555'] = 'B8';
backward['2563'] = 'B9';
backward['2551'] = 'BA';
backward['2557'] = 'BB';
backward['255D'] = 'BC';
backward['255C'] = 'BD';
backward['255B'] = 'BE';
backward['2510'] = 'BF';
backward['2514'] = 'C0';
backward['2534'] = 'C1';
backward['252C'] = 'C2';
backward['251C'] = 'C3';
backward['2500'] = 'C4';
backward['253C'] = 'C5';
backward['255E'] = 'C6';
backward['255F'] = 'C7';
backward['255A'] = 'C8';
backward['2554'] = 'C9';
backward['2569'] = 'CA';
backward['2566'] = 'CB';
backward['2560'] = 'CC';
backward['2550'] = 'CD';
backward['256C'] = 'CE';
backward['2567'] = 'CF';
backward['2568'] = 'D0';
backward['2564'] = 'D1';
backward['2565'] = 'D2';
backward['2559'] = 'D3';
backward['2558'] = 'D4';
backward['2552'] = 'D5';
backward['2553'] = 'D6';
backward['256B'] = 'D7';
backward['256A'] = 'D8';
backward['2518'] = 'D9';
backward['250C'] = 'DA';
backward['2588'] = 'DB';
backward['2584'] = 'DC';
backward['258C'] = 'DD';
backward['2590'] = 'DE';
backward['2580'] = 'DF';
backward['3B1'] = 'E0';
backward['DF'] = 'E1';
backward['393'] = 'E2';
backward['3C0'] = 'E3';
backward['3A3'] = 'E4';
backward['3C3'] = 'E5';
backward['B5'] = 'E6';
backward['3C4'] = 'E7';
backward['3A6'] = 'E8';
backward['398'] = 'E9';
backward['3A9'] = 'EA';
backward['3B4'] = 'EB';
backward['221E'] = 'EC';
backward['3C6'] = 'ED';
backward['3B5'] = 'EE';
backward['2229'] = 'EF';
backward['2261'] = 'F0';
backward['B1'] = 'F1';
backward['2265'] = 'F2';
backward['2264'] = 'F3';
backward['2320'] = 'F4';
backward['2321'] = 'F5';
backward['F7'] = 'F6';
backward['2248'] = 'F7';
backward['B0'] = 'F8';
backward['2219'] = 'F9';
backward['B7'] = 'FA';
backward['221A'] = 'FB';
backward['207F'] = 'FC';
backward['B2'] = 'FD';
backward['25A0'] = 'FE';
backward['A0'] = 'FF';

var hD="0123456789ABCDEF";
this.d2h = function(d)
{
var h = hD.substr(d&15,1);
while(d>15) {d>>=4;h=hD.substr(d&15,1)+h;}
return h;
}

this.h2d = function(h)
{
return parseInt(h,16);
}

this.WriteAll = function(what)
{
//Create Stream object
var BinaryStream = WScript.CreateObject("ADODB.Stream");
//Specify stream type - we cheat and get string but 'like' binary
BinaryStream.Type = adTypeText;
BinaryStream.CharSet = '437';
//Open the stream
BinaryStream.Open();
// Write to the stream
BinaryStream.WriteText(this.Forward437(what));
// Write the string to the disk
BinaryStream.SaveToFile(this.path, adSaveCreateOverWrite);

// Clearn up
BinaryStream.Close();
}

this.ReadAll = function()
{
//Create Stream object - needs ADO 2.5 or heigher
var BinaryStream = WScript.CreateObject("ADODB.Stream")
//Specify stream type - we cheat and get string but 'like' binary
BinaryStream.Type = adTypeText;
BinaryStream.CharSet = codePage;
//Open the stream
BinaryStream.Open();
//Load the file data from disk To stream object
BinaryStream.LoadFromFile(this.path);
//Open the stream And get binary 'string' from the object
var what = BinaryStream.ReadText;
// Clean up
BinaryStream.Close();
return this.Backward437(what);
}

/* Convert a octet number to a code page 437 char code */
this.Forward437 = function(inString)
{
var encArray = new Array();
var tmp='';
var i=0;
var c=0;
var l=inString.length;
var cc;
var h;
for(;i {
c++;
if(c==128)
{
encArray.push(tmp);
tmp='';
c=0;
}
cc=inString.charCodeAt(i);
if(cc {
tmp+=String.fromCharCode(cc);
}
else
{
h=this.d2h(cc);
h=forward[''+h];
tmp+=String.fromCharCode(this.h2d(h));
}
}
if(tmp!='')
{
encArray.push(tmp);
}

// this loop progressive concatonates the
// array elements entil there is only one
var ar2=new Array();
for(;encArray.length>1;)
{
var l=encArray.length;
for(var c=0;c {
if(c+1==l)
{
ar2.push(encArray[c]);
}
else
{
ar2.push(''+encArray[c]+encArray[c+1]);
}
}
encArray=ar2;
ar2=new Array();
}
return encArray[0];
}
/* Convert a code page 437 char code to a octet number*/
this.Backward437 = function(inString)
{
var encArray = new Array();
var tmp='';
var i=0;
var c=0;
var l=inString.length;
var cc;
var h;
for(;i {
c++;
if(c==128)
{
encArray.push(tmp);
tmp='';
c=0;
}
cc=inString.charCodeAt(i);
if(cc {
tmp+=String.fromCharCode(cc);
}
else
{
h=this.d2h(cc);
h=backward[''+h];
tmp+=String.fromCharCode(this.h2d(h));
}
}
if(tmp!='')
{
encArray.push(tmp);
}

// this loop progressive concatonates the
// array elements entil there is only one
var ar2=new Array();
for(;encArray.length>1;)
{
var l=encArray.length;
for(var c=0;c {
if(c+1==l)
{
ar2.push(encArray[c]);
}
else
{
ar2.push(''+encArray[c]+encArray[c+1]);
}
}
encArray=ar2;
ar2=new Array();
}
return encArray[0];
}

}

// 使用方法：
/*
var bf0=new BinaryFile();
var crFolder = 'C:/Temp/cr'
var bf1=new BinaryFile(crFolder+"/PCDV0026.JPG");
var bf2=new BinaryFile(crFolder+"/PCDV0026_.JPG");
bf2.WriteAll(bf1.ReadAll());
*/