[28388] | 1 |
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| 2 | /*
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| 3 | * Binary Ajax 0.1.10
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| 4 | * Copyright (c) 2008 Jacob Seidelin, [email protected], http://blog.nihilogic.dk/
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| 5 | * Licensed under the MPL License [http://www.nihilogic.dk/licenses/mpl-license.txt]
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| 6 | */
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| 7 |
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| 8 |
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| 9 | var BinaryFile = function(strData, iDataOffset, iDataLength) {
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| 10 | var data = strData;
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| 11 | var dataOffset = iDataOffset || 0;
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| 12 | var dataLength = 0;
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| 13 |
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| 14 | this.getRawData = function() {
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| 15 | return data;
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| 16 | }
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| 17 |
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| 18 | if (typeof strData === "string") {
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| 19 | dataLength = iDataLength || data.length;
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| 20 |
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| 21 | this.getByteAt = function(iOffset) {
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| 22 | return data.charCodeAt(iOffset + dataOffset) & 0xFF;
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| 23 | }
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| 24 |
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| 25 | this.getBytesAt = function(iOffset, iLength) {
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| 26 | var aBytes = [];
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| 27 |
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| 28 | for (var i = 0; i < iLength; i++) {
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| 29 | aBytes[i] = data.charCodeAt((iOffset + i) + dataOffset) & 0xFF
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| 30 | };
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| 31 |
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| 32 | return aBytes;
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| 33 | }
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| 34 | } else if (typeof strData === "unknown") {
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| 35 | dataLength = iDataLength || IEBinary_getLength(data);
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| 36 |
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| 37 | this.getByteAt = function(iOffset) {
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| 38 | return IEBinary_getByteAt(data, iOffset + dataOffset);
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| 39 | }
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| 40 |
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| 41 | this.getBytesAt = function(iOffset, iLength) {
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| 42 | return new VBArray(IEBinary_getBytesAt(data, iOffset + dataOffset, iLength)).toArray();
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| 43 | }
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| 44 | }
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| 45 |
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| 46 | this.getLength = function() {
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| 47 | return dataLength;
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| 48 | }
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| 49 |
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| 50 | this.getSByteAt = function(iOffset) {
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| 51 | var iByte = this.getByteAt(iOffset);
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| 52 | if (iByte > 127)
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| 53 | return iByte - 256;
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| 54 | else
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| 55 | return iByte;
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| 56 | }
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| 57 |
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| 58 | this.getShortAt = function(iOffset, bBigEndian) {
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| 59 | var iShort = bBigEndian ?
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| 60 | (this.getByteAt(iOffset) << 8) + this.getByteAt(iOffset + 1)
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| 61 | : (this.getByteAt(iOffset + 1) << 8) + this.getByteAt(iOffset)
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| 62 | if (iShort < 0) iShort += 65536;
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| 63 | return iShort;
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| 64 | }
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| 65 | this.getSShortAt = function(iOffset, bBigEndian) {
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| 66 | var iUShort = this.getShortAt(iOffset, bBigEndian);
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| 67 | if (iUShort > 32767)
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| 68 | return iUShort - 65536;
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| 69 | else
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| 70 | return iUShort;
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| 71 | }
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| 72 | this.getLongAt = function(iOffset, bBigEndian) {
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| 73 | var iByte1 = this.getByteAt(iOffset),
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| 74 | iByte2 = this.getByteAt(iOffset + 1),
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| 75 | iByte3 = this.getByteAt(iOffset + 2),
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| 76 | iByte4 = this.getByteAt(iOffset + 3);
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| 77 |
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| 78 | var iLong = bBigEndian ?
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| 79 | (((((iByte1 << 8) + iByte2) << 8) + iByte3) << 8) + iByte4
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| 80 | : (((((iByte4 << 8) + iByte3) << 8) + iByte2) << 8) + iByte1;
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| 81 | if (iLong < 0) iLong += 4294967296;
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| 82 | return iLong;
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| 83 | }
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| 84 | this.getSLongAt = function(iOffset, bBigEndian) {
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| 85 | var iULong = this.getLongAt(iOffset, bBigEndian);
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| 86 | if (iULong > 2147483647)
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| 87 | return iULong - 4294967296;
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| 88 | else
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| 89 | return iULong;
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| 90 | }
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| 91 |
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| 92 | this.getStringAt = function(iOffset, iLength) {
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| 93 | var aStr = [];
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| 94 |
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| 95 | var aBytes = this.getBytesAt(iOffset, iLength);
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| 96 | for (var j=0; j < iLength; j++) {
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| 97 | aStr[j] = String.fromCharCode(aBytes[j]);
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| 98 | }
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| 99 | return aStr.join("");
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| 100 | }
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| 101 |
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| 102 | this.getCharAt = function(iOffset) {
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| 103 | return String.fromCharCode(this.getByteAt(iOffset));
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| 104 | }
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| 105 | this.toBase64 = function() {
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| 106 | return window.btoa(data);
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| 107 | }
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| 108 | this.fromBase64 = function(strBase64) {
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| 109 | data = window.atob(strBase64);
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| 110 | }
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| 111 | }
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| 112 |
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| 113 |
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| 114 | var BinaryAjax = (function() {
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| 115 |
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| 116 | function createRequest() {
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| 117 | var oHTTP = null;
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| 118 | if (window.ActiveXObject) {
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| 119 | oHTTP = new ActiveXObject("Microsoft.XMLHTTP");
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| 120 | } else if (window.XMLHttpRequest) {
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| 121 | oHTTP = new XMLHttpRequest();
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| 122 | }
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| 123 | return oHTTP;
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| 124 | }
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| 125 |
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| 126 | function getHead(strURL, fncCallback, fncError) {
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| 127 | var oHTTP = createRequest();
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| 128 | if (oHTTP) {
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| 129 | if (fncCallback) {
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| 130 | if (typeof(oHTTP.onload) != "undefined") {
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| 131 | oHTTP.onload = function() {
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| 132 | if (oHTTP.status === "200") {
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| 133 | fncCallback(this);
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| 134 | } else {
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| 135 | if (fncError) fncError();
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| 136 | }
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| 137 | oHTTP = null;
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| 138 | };
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| 139 | } else {
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| 140 | oHTTP.onreadchange = function() {
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| 141 | if (oHTTP.readyState === 4) {
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| 142 | if (oHTTP.status === "200") {
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| 143 | fncCallback(this);
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| 144 | } else {
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| 145 | if (fncError) fncError();
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| 146 | }
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| 147 | oHTTP = null;
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| 148 | }
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| 149 | };
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| 150 | }
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| 151 | }
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| 152 | oHTTP.open("HEAD", strURL, true);
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| 153 | oHTTP.send(null);
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| 154 | } else {
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| 155 | if (fncError) fncError();
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| 156 | }
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| 157 | }
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| 158 |
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| 159 | function sendRequest(strURL, fncCallback, fncError, aRange, bAcceptRanges, iFileSize) {
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| 160 | var oHTTP = createRequest();
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| 161 | if (oHTTP) {
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| 162 |
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| 163 | var iDataOffset = 0;
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| 164 | if (aRange && !bAcceptRanges) {
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| 165 | iDataOffset = aRange[0];
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| 166 | }
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| 167 | var iDataLen = 0;
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| 168 | if (aRange) {
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| 169 | iDataLen = aRange[1]-aRange[0]+1;
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| 170 | }
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| 171 |
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| 172 | if (fncCallback) {
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| 173 | if (typeof(oHTTP.onload) != "undefined") {
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| 174 | oHTTP.onload = function() {
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| 175 | if (oHTTP.status === "200" || oHTTP.status === "206" || oHTTP.status === "0") {
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| 176 | oHTTP.binaryResponse = new BinaryFile(oHTTP.responseText, iDataOffset, iDataLen);
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| 177 | oHTTP.fileSize = iFileSize || oHTTP.getResponseHeader("Content-Length");
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| 178 | fncCallback(oHTTP);
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| 179 | } else {
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| 180 | if (fncError) fncError();
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| 181 | }
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| 182 | oHTTP = null;
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| 183 | };
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| 184 | } else {
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| 185 | oHTTP.onreadchange = function() {
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| 186 | if (oHTTP.readyState === 4) {
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| 187 | if (oHTTP.status === "200" || oHTTP.status === "206" || oHTTP.status === "0") {
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| 188 | // IE6 craps if we try to extend the XHR object
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| 189 | var oRes = {
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| 190 | status : oHTTP.status,
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| 191 | // IE needs responseBody, Chrome/Safari needs responseText
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| 192 | binaryResponse : new BinaryFile(
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| 193 | typeof oHTTP.responseBody === "unknown" ? oHTTP.responseBody : oHTTP.responseText, iDataOffset, iDataLen
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| 194 | ),
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| 195 | fileSize : iFileSize || oHTTP.getResponseHeader("Content-Length")
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| 196 | };
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| 197 | fncCallback(oRes);
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| 198 | } else {
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| 199 | if (fncError) fncError();
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| 200 | }
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| 201 | oHTTP = null;
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| 202 | }
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| 203 | };
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| 204 | }
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| 205 | }
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| 206 | oHTTP.open("GET", strURL, true);
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| 207 |
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| 208 | if (oHTTP.overrideMimeType) oHTTP.overrideMimeType('text/plain; charset=x-user-defined');
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| 209 |
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| 210 | if (aRange && bAcceptRanges) {
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| 211 | oHTTP.setRequestHeader("Range", "bytes=" + aRange[0] + "-" + aRange[1]);
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| 212 | }
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| 213 |
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| 214 | oHTTP.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 1970 00:00:00 GMT");
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| 215 |
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| 216 | oHTTP.send(null);
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| 217 | } else {
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| 218 | if (fncError) fncError();
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| 219 | }
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| 220 | }
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| 221 |
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| 222 | return function(strURL, fncCallback, fncError, aRange) {
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| 223 |
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| 224 | if (aRange) {
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| 225 | getHead(
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| 226 | strURL,
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| 227 | function(oHTTP) {
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| 228 | var iLength = parseInt(oHTTP.getResponseHeader("Content-Length"),10);
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| 229 | var strAcceptRanges = oHTTP.getResponseHeader("Accept-Ranges");
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| 230 |
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| 231 | var iStart, iEnd;
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| 232 | iStart = aRange[0];
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| 233 | if (aRange[0] < 0)
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| 234 | iStart += iLength;
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| 235 | iEnd = iStart + aRange[1] - 1;
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| 236 |
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| 237 | sendRequest(strURL, fncCallback, fncError, [iStart, iEnd], (strAcceptRanges === "bytes"), iLength);
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| 238 | }
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| 239 | );
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| 240 |
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| 241 | } else {
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| 242 | sendRequest(strURL, fncCallback, fncError);
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| 243 | }
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| 244 | }
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| 245 |
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| 246 | }());
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| 247 |
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| 248 | /*
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| 249 | document.write(
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| 250 | "<script type='text/vbscript'>\r\n"
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| 251 | + "Function IEBinary_getByteAt(strBinary, iOffset)\r\n"
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| 252 | + " IEBinary_getByteAt = AscB(MidB(strBinary,iOffset+1,1))\r\n"
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| 253 | + "End Function\r\n"
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| 254 | + "Function IEBinary_getLength(strBinary)\r\n"
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| 255 | + " IEBinary_getLength = LenB(strBinary)\r\n"
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| 256 | + "End Function\r\n"
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| 257 | + "</script>\r\n"
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| 258 | );
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| 259 | */
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| 260 |
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| 261 | document.write(
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| 262 | "<script type='text/vbscript'>\r\n"
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| 263 | + "Function IEBinary_getByteAt(strBinary, iOffset)\r\n"
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| 264 | + " IEBinary_getByteAt = AscB(MidB(strBinary, iOffset + 1, 1))\r\n"
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| 265 | + "End Function\r\n"
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| 266 | + "Function IEBinary_getBytesAt(strBinary, iOffset, iLength)\r\n"
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| 267 | + " Dim aBytes()\r\n"
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| 268 | + " ReDim aBytes(iLength - 1)\r\n"
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| 269 | + " For i = 0 To iLength - 1\r\n"
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| 270 | + " aBytes(i) = IEBinary_getByteAt(strBinary, iOffset + i)\r\n"
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| 271 | + " Next\r\n"
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| 272 | + " IEBinary_getBytesAt = aBytes\r\n"
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| 273 | + "End Function\r\n"
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| 274 | + "Function IEBinary_getLength(strBinary)\r\n"
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| 275 | + " IEBinary_getLength = LenB(strBinary)\r\n"
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| 276 | + "End Function\r\n"
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| 277 | + "</script>\r\n"
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| 278 | );
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