Merge remote-tracking branch 'Comic/comic_server'
# Conflicts: # cps/helper.py # cps/static/js/archive.js # cps/static/js/io.js # cps/static/js/kthoom.js # cps/static/js/unrar.js # cps/static/js/untar.js # cps/static/js/unzip.js # cps/templates/config_edit.html # cps/templates/detail.html # cps/templates/readcbr.html # cps/templates/stats.html # cps/ub.py # cps/web.py # optional-requirements.txt
This commit is contained in:
OzzieIsaacs
@ -9,7 +9,7 @@
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* ZIP format: http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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* DEFLATE format: http://tools.ietf.org/html/rfc1951
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*/
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/* global bitjs, importScripts, Uint8Array */
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/* global bitjs */
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// This file expects to be invoked as a Worker (see onmessage below).
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importScripts("io.js");
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@ -44,12 +44,12 @@ var zLocalFileHeaderSignature = 0x04034b50;
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var zArchiveExtraDataSignature = 0x08064b50;
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var zCentralFileHeaderSignature = 0x02014b50;
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var zDigitalSignatureSignature = 0x05054b50;
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//var zEndOfCentralDirSignature = 0x06064b50;
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//var zEndOfCentralDirLocatorSignature = 0x07064b50;
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var zEndOfCentralDirSignature = 0x06064b50;
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var zEndOfCentralDirLocatorSignature = 0x07064b50;
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// takes a ByteStream and parses out the local file information
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var ZipLocalFile = function(bstream) {
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if (typeof bstream !== typeof {} || !bstream.readNumber || typeof bstream.readNumber !== typeof function() {} ) {
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if (typeof bstream != typeof {} || !bstream.readNumber || typeof bstream.readNumber != typeof function(){}) {
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return null;
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}
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@ -100,7 +100,7 @@ var ZipLocalFile = function(bstream) {
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// "This descriptor exists only if bit 3 of the general purpose bit flag is set"
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// But how do you figure out how big the file data is if you don't know the compressedSize
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// from the header?!?
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if ((this.generalPurpose & bitjs.BIT[3]) !== 0) {
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if ((this.generalPurpose & bitjs.BIT[3]) != 0) {
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this.crc32 = bstream.readNumber(4);
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this.compressedSize = bstream.readNumber(4);
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this.uncompressedSize = bstream.readNumber(4);
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@ -111,15 +111,17 @@ var ZipLocalFile = function(bstream) {
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ZipLocalFile.prototype.unzip = function() {
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// Zip Version 1.0, no compression (store only)
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if (this.compressionMethod === 0 ) {
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info("ZIP v" + this.version + ", store only: " + this.filename + " (" + this.compressedSize + " bytes)");
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if (this.compressionMethod == 0 ) {
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info("ZIP v"+this.version+", store only: " + this.filename + " (" + this.compressedSize + " bytes)");
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currentBytesUnarchivedInFile = this.compressedSize;
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currentBytesUnarchived += this.compressedSize;
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} else if (this.compressionMethod === 8) {
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// version == 20, compression method == 8 (DEFLATE)
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}
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// version == 20, compression method == 8 (DEFLATE)
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else if (this.compressionMethod == 8) {
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info("ZIP v2.0, DEFLATE: " + this.filename + " (" + this.compressedSize + " bytes)");
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this.fileData = inflate(this.fileData, this.uncompressedSize);
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} else {
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}
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else {
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err("UNSUPPORTED VERSION/FORMAT: ZIP v" + this.version + ", compression method=" + this.compressionMethod + ": " + this.filename + " (" + this.compressedSize + " bytes)");
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this.fileData = null;
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}
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@ -142,10 +144,10 @@ var unzip = function(arrayBuffer) {
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var bstream = new bitjs.io.ByteStream(arrayBuffer);
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// detect local file header signature or return null
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if (bstream.peekNumber(4) === zLocalFileHeaderSignature) {
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if (bstream.peekNumber(4) == zLocalFileHeaderSignature) {
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var localFiles = [];
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// loop until we don't see any more local files
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while (bstream.peekNumber(4) === zLocalFileHeaderSignature) {
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while (bstream.peekNumber(4) == zLocalFileHeaderSignature) {
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var oneLocalFile = new ZipLocalFile(bstream);
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// this should strip out directories/folders
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if (oneLocalFile && oneLocalFile.uncompressedSize > 0 && oneLocalFile.fileData) {
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@ -156,14 +158,14 @@ var unzip = function(arrayBuffer) {
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totalFilesInArchive = localFiles.length;
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// got all local files, now sort them
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localFiles.sort(function(a, b) {
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localFiles.sort(function(a,b) {
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var aname = a.filename.toLowerCase();
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var bname = b.filename.toLowerCase();
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return aname > bname ? 1 : -1;
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});
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// archive extra data record
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if (bstream.peekNumber(4) === zArchiveExtraDataSignature) {
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if (bstream.peekNumber(4) == zArchiveExtraDataSignature) {
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info(" Found an Archive Extra Data Signature");
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// skipping this record for now
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@ -174,11 +176,11 @@ var unzip = function(arrayBuffer) {
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// central directory structure
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// TODO: handle the rest of the structures (Zip64 stuff)
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if (bstream.peekNumber(4) === zCentralFileHeaderSignature) {
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if (bstream.peekNumber(4) == zCentralFileHeaderSignature) {
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info(" Found a Central File Header");
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// read all file headers
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while (bstream.peekNumber(4) === zCentralFileHeaderSignature) {
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while (bstream.peekNumber(4) == zCentralFileHeaderSignature) {
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bstream.readNumber(4); // signature
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bstream.readNumber(2); // version made by
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bstream.readNumber(2); // version needed to extract
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@ -204,7 +206,7 @@ var unzip = function(arrayBuffer) {
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}
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// digital signature
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if (bstream.peekNumber(4) === zDigitalSignatureSignature) {
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if (bstream.peekNumber(4) == zDigitalSignatureSignature) {
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info(" Found a Digital Signature");
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bstream.readNumber(4);
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@ -229,68 +231,66 @@ var unzip = function(arrayBuffer) {
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// actually do the unzipping
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localfile.unzip();
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if (localfile.fileData !== null) {
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if (localfile.fileData != null) {
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postMessage(new bitjs.archive.UnarchiveExtractEvent(localfile));
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postProgress();
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}
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}
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postProgress();
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postMessage(new bitjs.archive.UnarchiveFinishEvent());
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}
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};
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}
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}
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// returns a table of Huffman codes
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// each entry's index is its code and its value is a JavaScript object
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// containing {length: 6, symbol: X}
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function getHuffmanCodes(bitLengths) {
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var len;
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// ensure bitLengths is an array containing at least one element
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if (typeof bitLengths !== typeof [] || bitLengths.length < 1) {
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if (typeof bitLengths != typeof [] || bitLengths.length < 1) {
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err("Error! getHuffmanCodes() called with an invalid array");
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return null;
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}
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// Reference: http://tools.ietf.org/html/rfc1951#page-8
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var numLengths = bitLengths.length,
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blCount = [],
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bl_count = [],
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MAX_BITS = 1;
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// Step 1: count up how many codes of each length we have
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for (var i = 0; i < numLengths; ++i) {
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len = bitLengths[i];
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var length = bitLengths[i];
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// test to ensure each bit length is a positive, non-zero number
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if (typeof len !== typeof 1 || len < 0) {
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err("bitLengths contained an invalid number in getHuffmanCodes(): " + len + " of type " + (typeof len));
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if (typeof length != typeof 1 || length < 0) {
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err("bitLengths contained an invalid number in getHuffmanCodes(): " + length + " of type " + (typeof length));
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return null;
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}
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// increment the appropriate bitlength count
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if (blCount[len] === undefined) blCount[len] = 0;
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if (bl_count[length] == undefined) bl_count[length] = 0;
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// a length of zero means this symbol is not participating in the huffman coding
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if (len > 0) blCount[len]++;
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if (length > 0) bl_count[length]++;
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if (len > MAX_BITS) MAX_BITS = len;
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if (length > MAX_BITS) MAX_BITS = length;
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}
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// Step 2: Find the numerical value of the smallest code for each code length
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var nextCode = [],
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var next_code = [],
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code = 0;
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for (var bits = 1; bits <= MAX_BITS; ++bits) {
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len = bits - 1;
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var length = bits-1;
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// ensure undefined lengths are zero
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if (blCount[len] === undefined) blCount[len] = 0;
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code = (code + blCount[bits - 1]) << 1;
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nextCode[bits] = code;
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if (bl_count[length] == undefined) bl_count[length] = 0;
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code = (code + bl_count[bits-1]) << 1;
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next_code[bits] = code;
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}
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// Step 3: Assign numerical values to all codes
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var table = {}, tableLength = 0;
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for (var n = 0; n < numLengths; ++n) {
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len = bitLengths[n];
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if (len !== 0) {
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table[nextCode[len]] = { length: len, symbol: n }; //, bitstring: binaryValueToString(nextCode[len],len) };
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var len = bitLengths[n];
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if (len != 0) {
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table[next_code[len]] = { length: len, symbol: n }; //, bitstring: binaryValueToString(next_code[len],len) };
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tableLength++;
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nextCode[len]++;
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next_code[len]++;
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}
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}
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table.maxLength = tableLength;
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@ -318,11 +318,10 @@ function getHuffmanCodes(bitLengths) {
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var fixedHCtoLiteral = null;
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var fixedHCtoDistance = null;
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function getFixedLiteralTable() {
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var i;
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// create once
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if (!fixedHCtoLiteral) {
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var bitlengths = new Array(288);
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for (i = 0; i <= 143; ++i) bitlengths[i] = 8;
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for (var i = 0; i <= 143; ++i) bitlengths[i] = 8;
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for (i = 144; i <= 255; ++i) bitlengths[i] = 9;
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for (i = 256; i <= 279; ++i) bitlengths[i] = 7;
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for (i = 280; i <= 287; ++i) bitlengths[i] = 8;
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@ -336,9 +335,7 @@ function getFixedDistanceTable() {
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// create once
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if (!fixedHCtoDistance) {
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var bitlengths = new Array(32);
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for (var i = 0; i < 32; ++i) {
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bitlengths[i] = 5;
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}
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for (var i = 0; i < 32; ++i) { bitlengths[i] = 5; }
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// get huffman code table
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fixedHCtoDistance = getHuffmanCodes(bitlengths);
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@ -350,17 +347,17 @@ function getFixedDistanceTable() {
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// then return that symbol
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function decodeSymbol(bstream, hcTable) {
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var code = 0, len = 0;
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// var match = false;
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var match = false;
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// loop until we match
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for (;;) {
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// read in next bit
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var bit = bstream.readBits(1);
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code = (code << 1) | bit;
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code = (code<<1) | bit;
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++len;
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// check against Huffman Code table and break if found
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if (hcTable.hasOwnProperty(code) && hcTable[code].length === len) {
|
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if (hcTable.hasOwnProperty(code) && hcTable[code].length == len) {
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break;
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}
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@ -375,31 +372,31 @@ function decodeSymbol(bstream, hcTable) {
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var CodeLengthCodeOrder = [16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15];
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/*
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Extra Extra Extra
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Code Bits Length(s) Code Bits Lengths Code Bits Length(s)
|
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---- ---- ------ ---- ---- ------- ---- ---- -------
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257 0 3 267 1 15,16 277 4 67-82
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258 0 4 268 1 17,18 278 4 83-98
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259 0 5 269 2 19-22 279 4 99-114
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260 0 6 270 2 23-26 280 4 115-130
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261 0 7 271 2 27-30 281 5 131-162
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262 0 8 272 2 31-34 282 5 163-194
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263 0 9 273 3 35-42 283 5 195-226
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264 0 10 274 3 43-50 284 5 227-257
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265 1 11,12 275 3 51-58 285 0 258
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266 1 13,14 276 3 59-66
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*/
|
||||
/*
|
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Extra Extra Extra
|
||||
Code Bits Length(s) Code Bits Lengths Code Bits Length(s)
|
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---- ---- ------ ---- ---- ------- ---- ---- -------
|
||||
257 0 3 267 1 15,16 277 4 67-82
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||||
258 0 4 268 1 17,18 278 4 83-98
|
||||
259 0 5 269 2 19-22 279 4 99-114
|
||||
260 0 6 270 2 23-26 280 4 115-130
|
||||
261 0 7 271 2 27-30 281 5 131-162
|
||||
262 0 8 272 2 31-34 282 5 163-194
|
||||
263 0 9 273 3 35-42 283 5 195-226
|
||||
264 0 10 274 3 43-50 284 5 227-257
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||||
265 1 11,12 275 3 51-58 285 0 258
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||||
266 1 13,14 276 3 59-66
|
||||
|
||||
*/
|
||||
var LengthLookupTable = [
|
||||
[0, 3], [0, 4], [0, 5], [0, 6],
|
||||
[0, 7], [0, 8], [0, 9], [0, 10],
|
||||
[1, 11], [1, 13], [1, 15], [1, 17],
|
||||
[2, 19], [2, 23], [2, 27], [2, 31],
|
||||
[3, 35], [3, 43], [3, 51], [3, 59],
|
||||
[4, 67], [4, 83], [4, 99], [4, 115],
|
||||
[5, 131], [5, 163], [5, 195], [5, 227],
|
||||
[0, 258]
|
||||
[0,3], [0,4], [0,5], [0,6],
|
||||
[0,7], [0,8], [0,9], [0,10],
|
||||
[1,11], [1,13], [1,15], [1,17],
|
||||
[2,19], [2,23], [2,27], [2,31],
|
||||
[3,35], [3,43], [3,51], [3,59],
|
||||
[4,67], [4,83], [4,99], [4,115],
|
||||
[5,131], [5,163], [5,195], [5,227],
|
||||
[0,258]
|
||||
];
|
||||
/*
|
||||
Extra Extra Extra
|
||||
@ -417,20 +414,20 @@ var LengthLookupTable = [
|
||||
9 3 25-32 19 8 769-1024 29 13 24577-32768
|
||||
*/
|
||||
var DistLookupTable = [
|
||||
[0, 1], [0, 2], [0, 3], [0, 4],
|
||||
[1, 5], [1, 7],
|
||||
[2, 9], [2, 13],
|
||||
[3, 17], [3, 25],
|
||||
[4, 33], [4, 49],
|
||||
[5, 65], [5, 97],
|
||||
[6, 129], [6, 193],
|
||||
[7, 257], [7, 385],
|
||||
[8, 513], [8, 769],
|
||||
[9, 1025], [9, 1537],
|
||||
[10, 2049], [10, 3073],
|
||||
[11, 4097], [11, 6145],
|
||||
[12, 8193], [12, 12289],
|
||||
[13, 16385], [13, 24577]
|
||||
[0,1], [0,2], [0,3], [0,4],
|
||||
[1,5], [1,7],
|
||||
[2,9], [2,13],
|
||||
[3,17], [3,25],
|
||||
[4,33], [4,49],
|
||||
[5,65], [5,97],
|
||||
[6,129], [6,193],
|
||||
[7,257], [7,385],
|
||||
[8,513], [8,769],
|
||||
[9,1025], [9,1537],
|
||||
[10,2049], [10,3073],
|
||||
[11,4097], [11,6145],
|
||||
[12,8193], [12,12289],
|
||||
[13,16385], [13,24577]
|
||||
];
|
||||
|
||||
function inflateBlockData(bstream, hcLiteralTable, hcDistanceTable, buffer) {
|
||||
@ -449,10 +446,10 @@ function inflateBlockData(bstream, hcLiteralTable, hcDistanceTable, buffer) {
|
||||
stream, and copy length bytes from this
|
||||
position to the output stream.
|
||||
*/
|
||||
var blockSize = 0;
|
||||
var numSymbols = 0, blockSize = 0;
|
||||
for (;;) {
|
||||
var symbol = decodeSymbol(bstream, hcLiteralTable);
|
||||
// ++numSymbols;
|
||||
++numSymbols;
|
||||
if (symbol < 256) {
|
||||
// copy literal byte to output
|
||||
buffer.insertByte(symbol);
|
||||
@ -460,11 +457,11 @@ function inflateBlockData(bstream, hcLiteralTable, hcDistanceTable, buffer) {
|
||||
}
|
||||
else {
|
||||
// end of block reached
|
||||
if (symbol === 256) {
|
||||
if (symbol == 256) {
|
||||
break;
|
||||
}
|
||||
else {
|
||||
var lengthLookup = LengthLookupTable[symbol - 257],
|
||||
var lengthLookup = LengthLookupTable[symbol-257],
|
||||
length = lengthLookup[1] + bstream.readBits(lengthLookup[0]),
|
||||
distLookup = DistLookupTable[decodeSymbol(bstream, hcDistanceTable)],
|
||||
distance = distLookup[1] + bstream.readBits(distLookup[0]);
|
||||
@ -482,13 +479,13 @@ function inflateBlockData(bstream, hcLiteralTable, hcDistanceTable, buffer) {
|
||||
// loop for each character
|
||||
var ch = buffer.ptr - distance;
|
||||
blockSize += length;
|
||||
if (length > distance) {
|
||||
var data = buffer.data;
|
||||
while (length--) {
|
||||
buffer.insertByte(data[ch++]);
|
||||
}
|
||||
if(length > distance) {
|
||||
var data = buffer.data;
|
||||
while (length--) {
|
||||
buffer.insertByte(data[ch++]);
|
||||
}
|
||||
} else {
|
||||
buffer.insertBytes(buffer.data.subarray(ch, ch + length));
|
||||
buffer.insertBytes(buffer.data.subarray(ch, ch + length))
|
||||
}
|
||||
|
||||
} // length-distance pair
|
||||
@ -507,38 +504,37 @@ function inflate(compressedData, numDecompressedBytes) {
|
||||
compressedData.byteOffset,
|
||||
compressedData.byteLength);
|
||||
var buffer = new bitjs.io.ByteBuffer(numDecompressedBytes);
|
||||
//var numBlocks = 0;
|
||||
var blockSize = 0;
|
||||
var bFinal;
|
||||
var numBlocks = 0, blockSize = 0;
|
||||
|
||||
// block format: http://tools.ietf.org/html/rfc1951#page-9
|
||||
do {
|
||||
bFinal = bstream.readBits(1);
|
||||
var bType = bstream.readBits(2);
|
||||
var bFinal = bstream.readBits(1),
|
||||
bType = bstream.readBits(2);
|
||||
blockSize = 0;
|
||||
// ++numBlocks;
|
||||
++numBlocks;
|
||||
// no compression
|
||||
if (bType === 0) {
|
||||
if (bType == 0) {
|
||||
// skip remaining bits in this byte
|
||||
while (bstream.bitPtr !== 0) bstream.readBits(1);
|
||||
var len = bstream.readBits(16);
|
||||
// nlen = bstream.readBits(16);
|
||||
while (bstream.bitPtr != 0) bstream.readBits(1);
|
||||
var len = bstream.readBits(16),
|
||||
nlen = bstream.readBits(16);
|
||||
// TODO: check if nlen is the ones-complement of len?
|
||||
|
||||
if (len > 0) buffer.insertBytes(bstream.readBytes(len));
|
||||
if(len > 0) buffer.insertBytes(bstream.readBytes(len));
|
||||
blockSize = len;
|
||||
}
|
||||
// fixed Huffman codes
|
||||
else if (bType === 1) {
|
||||
else if(bType == 1) {
|
||||
blockSize = inflateBlockData(bstream, getFixedLiteralTable(), getFixedDistanceTable(), buffer);
|
||||
}
|
||||
// dynamic Huffman codes
|
||||
else if (bType === 2) {
|
||||
else if(bType == 2) {
|
||||
var numLiteralLengthCodes = bstream.readBits(5) + 257;
|
||||
var numDistanceCodes = bstream.readBits(5) + 1,
|
||||
numCodeLengthCodes = bstream.readBits(4) + 4;
|
||||
|
||||
// populate the array of code length codes (first de-compaction)
|
||||
var codeLengthsCodeLengths = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
|
||||
var codeLengthsCodeLengths = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
|
||||
for (var i = 0; i < numCodeLengthCodes; ++i) {
|
||||
codeLengthsCodeLengths[ CodeLengthCodeOrder[i] ] = bstream.readBits(3);
|
||||
}
|
||||
@ -566,25 +562,24 @@ function inflate(compressedData, numDecompressedBytes) {
|
||||
var prevCodeLength = 0;
|
||||
while (literalCodeLengths.length < numLiteralLengthCodes + numDistanceCodes) {
|
||||
var symbol = decodeSymbol(bstream, codeLengthsCodes);
|
||||
var repeat;
|
||||
if (symbol <= 15) {
|
||||
literalCodeLengths.push(symbol);
|
||||
prevCodeLength = symbol;
|
||||
}
|
||||
else if (symbol === 16) {
|
||||
repeat = bstream.readBits(2) + 3;
|
||||
else if (symbol == 16) {
|
||||
var repeat = bstream.readBits(2) + 3;
|
||||
while (repeat--) {
|
||||
literalCodeLengths.push(prevCodeLength);
|
||||
}
|
||||
}
|
||||
else if (symbol === 17) {
|
||||
repeat = bstream.readBits(3) + 3;
|
||||
else if (symbol == 17) {
|
||||
var repeat = bstream.readBits(3) + 3;
|
||||
while (repeat--) {
|
||||
literalCodeLengths.push(0);
|
||||
}
|
||||
}
|
||||
else if (symbol === 18) {
|
||||
repeat = bstream.readBits(7) + 11;
|
||||
else if (symbol == 18) {
|
||||
var repeat = bstream.readBits(7) + 11;
|
||||
while (repeat--) {
|
||||
literalCodeLengths.push(0);
|
||||
}
|
||||
@ -610,7 +605,7 @@ function inflate(compressedData, numDecompressedBytes) {
|
||||
currentBytesUnarchived += blockSize;
|
||||
postProgress();
|
||||
|
||||
} while (bFinal !== 1);
|
||||
} while (bFinal != 1);
|
||||
// we are done reading blocks if the bFinal bit was set for this block
|
||||
|
||||
// return the buffer data bytes
|
||||
|
||||
Reference in New Issue
Block a user