binaryajax.js 0.2HEADmaster

found at https://raw.githubusercontent.com/jseidelin/binaryajax/master/binaryajax.js

1 files changed, 132 insertions, 172 deletions

diff --git a/binaryajax.js b/binaryajax.js
index f7b5b48..5323034 100644
--- a/binaryajax.js
+++ b/binaryajax.js
@@ -1,112 +1,96 @@
 
 /*
- * Binary Ajax 0.1.10
+ * Binary Ajax 0.2
  * Copyright (c) 2008 Jacob Seidelin, cupboy@gmail.com, http://blog.nihilogic.dk/
  * Licensed under the MPL License [http://www.nihilogic.dk/licenses/mpl-license.txt]
  */
 
 
-var BinaryFile = function(strData, iDataOffset, iDataLength) {
-	var data = strData;
-	var dataOffset = iDataOffset || 0;
+var BinaryFile = function(data, dataOffset, dataLength) {
+	var dataOffset = dataOffset || 0;
 	var dataLength = 0;
 
 	this.getRawData = function() {
 		return data;
 	}
 
-	if (typeof strData == "string") {
-		dataLength = iDataLength || data.length;
+	if (typeof data == "string") {
+		dataLength = dataLength || data.length;
 
-		this.getByteAt = function(iOffset) {
-			return data.charCodeAt(iOffset + dataOffset) & 0xFF;
+		this.getByteAt = function(offset) {
+			return data.charCodeAt(offset + dataOffset) & 0xFF;
 		}
+	} else if (typeof data == "unknown") {
+		dataLength = dataLength || IEBinary_getLength(data);
 
-		this.getBytesAt = function(iOffset, iLength) {
-			var aBytes = [];
-
-			for (var i = 0; i < iLength; i++) {
-				aBytes[i] = data.charCodeAt((iOffset + i) + dataOffset) & 0xFF
-			};
-
-			return aBytes;
-		}
-	} else if (typeof strData == "unknown") {
-		dataLength = iDataLength || IEBinary_getLength(data);
-
-		this.getByteAt = function(iOffset) {
-			return IEBinary_getByteAt(data, iOffset + dataOffset);
+		this.getByteAt = function(offset) {
+			return IEBinary_getByteAt(data, offset + dataOffset);
 		}
+	} else {
 
-		this.getBytesAt = function(iOffset, iLength) {
-			return new VBArray(IEBinary_getBytesAt(data, iOffset + dataOffset, iLength)).toArray();
-		}
 	}
 
 	this.getLength = function() {
 		return dataLength;
 	}
 
-	this.getSByteAt = function(iOffset) {
-		var iByte = this.getByteAt(iOffset);
-		if (iByte > 127)
-			return iByte - 256;
+	this.getSByteAt = function(offset) {
+		var byte = this.getByteAt(offset);
+		if (byte > 127)
+			return byte - 256;
 		else
-			return iByte;
+			return byte;
 	}
 
-	this.getShortAt = function(iOffset, bBigEndian) {
-		var iShort = bBigEndian ?
-			(this.getByteAt(iOffset) << 8) + this.getByteAt(iOffset + 1)
-			: (this.getByteAt(iOffset + 1) << 8) + this.getByteAt(iOffset)
-		if (iShort < 0) iShort += 65536;
-		return iShort;
+	this.getShortAt = function(offset, bigEndian) {
+		var short = bigEndian ?
+			(this.getByteAt(offset) << 8) + this.getByteAt(offset + 1)
+			: (this.getByteAt(offset + 1) << 8) + this.getByteAt(offset)
+		if (short < 0) short += 65536;
+		return short;
 	}
-	this.getSShortAt = function(iOffset, bBigEndian) {
-		var iUShort = this.getShortAt(iOffset, bBigEndian);
-		if (iUShort > 32767)
-			return iUShort - 65536;
+	this.getSShortAt = function(offset, bigEndian) {
+		var ushort = this.getShortAt(offset, bigEndian);
+		if (ushort > 32767)
+			return ushort - 65536;
 		else
-			return iUShort;
-	}
-	this.getLongAt = function(iOffset, bBigEndian) {
-		var iByte1 = this.getByteAt(iOffset),
-			iByte2 = this.getByteAt(iOffset + 1),
-			iByte3 = this.getByteAt(iOffset + 2),
-			iByte4 = this.getByteAt(iOffset + 3);
-
-		var iLong = bBigEndian ?
-			(((((iByte1 << 8) + iByte2) << 8) + iByte3) << 8) + iByte4
-			: (((((iByte4 << 8) + iByte3) << 8) + iByte2) << 8) + iByte1;
-		if (iLong < 0) iLong += 4294967296;
-		return iLong;
-	}
-	this.getSLongAt = function(iOffset, bBigEndian) {
-		var iULong = this.getLongAt(iOffset, bBigEndian);
-		if (iULong > 2147483647)
-			return iULong - 4294967296;
+			return ushort;
+	}
+	this.getLongAt = function(offset, bigEndian) {
+		var byte1 = this.getByteAt(offset),
+			byte2 = this.getByteAt(offset + 1),
+			byte3 = this.getByteAt(offset + 2),
+			byte4 = this.getByteAt(offset + 3);
+
+		var long = bigEndian ?
+			(((((byte1 << 8) + byte2) << 8) + byte3) << 8) + byte4
+			: (((((byte4 << 8) + byte3) << 8) + byte2) << 8) + byte1;
+		if (long < 0) long += 4294967296;
+		return long;
+	}
+	this.getSLongAt = function(offset, bigEndian) {
+		var ulong = this.getLongAt(offset, bigEndian);
+		if (ulong > 2147483647)
+			return ulong - 4294967296;
 		else
-			return iULong;
+			return ulong;
 	}
-
-	this.getStringAt = function(iOffset, iLength) {
-		var aStr = [];
-
-		var aBytes = this.getBytesAt(iOffset, iLength);
-		for (var j=0; j < iLength; j++) {
-			aStr[j] = String.fromCharCode(aBytes[j]);
+	this.getStringAt = function(offset, length) {
+		var chars = [];
+		for (var i=offset,j=0;i<offset+length;i++,j++) {
+			chars[j] = String.fromCharCode(this.getByteAt(i));
 		}
-		return aStr.join("");
+		return chars.join("");
 	}
 
-	this.getCharAt = function(iOffset) {
-		return String.fromCharCode(this.getByteAt(iOffset));
+	this.getCharAt = function(offset) {
+		return String.fromCharCode(this.getByteAt(offset));
 	}
 	this.toBase64 = function() {
 		return window.btoa(data);
 	}
-	this.fromBase64 = function(strBase64) {
-		data = window.atob(strBase64);
+	this.fromBase64 = function(str) {
+		data = window.atob(str);
 	}
 }
 
@@ -114,162 +98,138 @@ var BinaryFile = function(strData, iDataOffset, iDataLength) {
 var BinaryAjax = (function() {
 
 	function createRequest() {
-		var oHTTP = null;
-		if (window.ActiveXObject) {
-			oHTTP = new ActiveXObject("Microsoft.XMLHTTP");
-		} else if (window.XMLHttpRequest) {
-			oHTTP = new XMLHttpRequest();
+		var http = null;
+		if (window.XMLHttpRequest) {
+			http = new XMLHttpRequest();
+		} else if (window.ActiveXObject) {
+			http = new ActiveXObject("Microsoft.XMLHTTP");
 		}
-		return oHTTP;
+		return http;
 	}
 
-	function getHead(strURL, fncCallback, fncError) {
-		var oHTTP = createRequest();
-		if (oHTTP) {
-			if (fncCallback) {
-				if (typeof(oHTTP.onload) != "undefined") {
-					oHTTP.onload = function() {
-						if (oHTTP.status == "200") {
-							fncCallback(this);
+	function getHead(url, callback, error) {
+		var http = createRequest();
+		if (http) {
+			if (callback) {
+				if (typeof(http.onload) != "undefined") {
+					http.onload = function() {
+						if (http.status == "200") {
+							callback(this);
 						} else {
-							if (fncError) fncError();
+							if (error) error();
 						}
-						oHTTP = null;
+						http = null;
 					};
 				} else {
-					oHTTP.onreadystatechange = function() {
-						if (oHTTP.readyState == 4) {
-							if (oHTTP.status == "200") {
-								fncCallback(this);
+					http.onreadystatechange = function() {
+						if (http.readyState == 4) {
+							if (http.status == "200") {
+								callback(this);
 							} else {
-								if (fncError) fncError();
+								if (error) error();
 							}
-							oHTTP = null;
+							http = null;
 						}
 					};
 				}
 			}
-			oHTTP.open("HEAD", strURL, true);
-			oHTTP.send(null);
+			http.open("HEAD", url, true);
+			http.send(null);
 		} else {
-			if (fncError) fncError();
+			if (error) error();
 		}
 	}
 
-	function sendRequest(strURL, fncCallback, fncError, aRange, bAcceptRanges, iFileSize) {
-		var oHTTP = createRequest();
-		if (oHTTP) {
+	function sendRequest(url, callback, error, range, acceptRanges, fileSize) {
+		var http = createRequest();
+		if (http) {
 
-			var iDataOffset = 0;
-			if (aRange && !bAcceptRanges) {
-				iDataOffset = aRange[0];
+			var dataOffset = 0;
+			if (range && !acceptRanges) {
+				dataOffset = range[0];
 			}
-			var iDataLen = 0;
-			if (aRange) {
-				iDataLen = aRange[1]-aRange[0]+1;
+			var dataLen = 0;
+			if (range) {
+				dataLen = range[1]-range[0]+1;
 			}
 
-			if (fncCallback) {
-				if (typeof(oHTTP.onload) != "undefined") {
-					oHTTP.onload = function() {
-						if (oHTTP.status == "200" || oHTTP.status == "206" || oHTTP.status == "0") {
-							oHTTP.binaryResponse = new BinaryFile(oHTTP.responseText, iDataOffset, iDataLen);
-							oHTTP.fileSize = iFileSize || oHTTP.getResponseHeader("Content-Length");
-							fncCallback(oHTTP);
+			if (callback) {
+				if (typeof(http.onload) != "undefined") {
+					http.onload = function() {
+						if (http.status == "200" || http.status == "206" || http.status == "0") {
+							http.binaryResponse = new BinaryFile(http.responseText, dataOffset, dataLen);
+							http.fileSize = fileSize || http.getResponseHeader("Content-Length");
+							callback(http);
 						} else {
-							if (fncError) fncError();
+							if (error) error();
 						}
-						oHTTP = null;
+						http = null;
 					};
 				} else {
-					oHTTP.onreadystatechange = function() {
-						if (oHTTP.readyState == 4) {
-							if (oHTTP.status == "200" || oHTTP.status == "206" || oHTTP.status == "0") {
+					http.onreadystatechange = function() {
+						if (http.readyState == 4) {
+							if (http.status == "200" || http.status == "206" || http.status == "0") {
 								// IE6 craps if we try to extend the XHR object
-								var oRes = {
-									status : oHTTP.status,
+								var res = {
+									status : http.status,
 									// IE needs responseBody, Chrome/Safari needs responseText
-									binaryResponse : new BinaryFile(
-										typeof oHTTP.responseBody == "unknown" ? oHTTP.responseBody : oHTTP.responseText, iDataOffset, iDataLen
-									),
-									fileSize : iFileSize || oHTTP.getResponseHeader("Content-Length")
+									binaryResponse : new BinaryFile(http.responseBody || http.responseText, dataOffset, dataLen),
+									fileSize : fileSize || http.getResponseHeader("Content-Length")
 								};
-								fncCallback(oRes);
+								callback(res);
 							} else {
-								if (fncError) fncError();
+								if (error) error();
 							}
-							oHTTP = null;
+							http = null;
 						}
 					};
 				}
 			}
-			oHTTP.open("GET", strURL, true);
+			http.open("GET", url, true);
 
-			if (oHTTP.overrideMimeType) oHTTP.overrideMimeType('text/plain; charset=x-user-defined');
+			if (http.overrideMimeType) http.overrideMimeType('text/plain; charset=x-user-defined');
 
-			if (aRange && bAcceptRanges) {
-				oHTTP.setRequestHeader("Range", "bytes=" + aRange[0] + "-" + aRange[1]);
+			if (range && acceptRanges) {
+				http.setRequestHeader("Range", "bytes=" + range[0] + "-" + range[1]);
 			}
 
-			oHTTP.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 1970 00:00:00 GMT");
+			http.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 1970 00:00:00 GMT");
 
-			oHTTP.send(null);
+			http.send(null);
 		} else {
-			if (fncError) fncError();
+			if (error) error();
 		}
 	}
 
-	return function(strURL, fncCallback, fncError, aRange) {
-
-		if (aRange) {
+	return function(url, callback, error, range) {
+		if (range) {
 			getHead(
-				strURL,
-				function(oHTTP) {
-					var iLength = parseInt(oHTTP.getResponseHeader("Content-Length"),10);
-					var strAcceptRanges = oHTTP.getResponseHeader("Accept-Ranges");
-
-					var iStart, iEnd;
-					iStart = aRange[0];
-					if (aRange[0] < 0)
-						iStart += iLength;
-					iEnd = iStart + aRange[1] - 1;
-
-					sendRequest(strURL, fncCallback, fncError, [iStart, iEnd], (strAcceptRanges == "bytes"), iLength);
+				url,
+				function(http) {
+					var length = parseInt(http.getResponseHeader("Content-Length"),10);
+					var acceptRanges = http.getResponseHeader("Accept-Ranges");
+
+					var start, end;
+					start = range[0];
+					if (range[0] < 0)
+						start += length;
+					end = start + range[1] - 1;
+
+					sendRequest(url, callback, error, [start, end], (acceptRanges == "bytes"), length);
 				}
 			);
-
 		} else {
-			sendRequest(strURL, fncCallback, fncError);
+			sendRequest(url, callback, error);
 		}
 	}
 
 }());
 
-/*
-document.write(
-	"<script type='text/vbscript'>\r\n"
-	+ "Function IEBinary_getByteAt(strBinary, iOffset)\r\n"
-	+ "	IEBinary_getByteAt = AscB(MidB(strBinary,iOffset+1,1))\r\n"
-	+ "End Function\r\n"
-	+ "Function IEBinary_getLength(strBinary)\r\n"
-	+ "	IEBinary_getLength = LenB(strBinary)\r\n"
-	+ "End Function\r\n"
-	+ "</script>\r\n"
-);
-*/
 
 document.write(
 	"<script type='text/vbscript'>\r\n"
-	+ "Function IEBinary_getByteAt(strBinary, iOffset)\r\n"
-	+ "	IEBinary_getByteAt = AscB(MidB(strBinary, iOffset + 1, 1))\r\n"
-	+ "End Function\r\n"
-	+ "Function IEBinary_getBytesAt(strBinary, iOffset, iLength)\r\n"
-	+ "  Dim aBytes()\r\n"
-	+ "  ReDim aBytes(iLength - 1)\r\n"
-	+ "  For i = 0 To iLength - 1\r\n"
-	+ "   aBytes(i) = IEBinary_getByteAt(strBinary, iOffset + i)\r\n"
-	+ "  Next\r\n"
-	+ "  IEBinary_getBytesAt = aBytes\r\n"
+	+ "Function IEBinary_getByteAt(strBinary, offset)\r\n"
+	+ "	IEBinary_getByteAt = AscB(MidB(strBinary,offset+1,1))\r\n"
 	+ "End Function\r\n"
 	+ "Function IEBinary_getLength(strBinary)\r\n"
 	+ "	IEBinary_getLength = LenB(strBinary)\r\n"