--- /dev/null
+'use strict';
+var StringReader = require('./stringReader');
+var utils = require('./utils');
+var CompressedObject = require('./compressedObject');
+var jszipProto = require('./object');
+
+var MADE_BY_DOS = 0x00;
+var MADE_BY_UNIX = 0x03;
+
+// class ZipEntry {{{
+/**
+ * An entry in the zip file.
+ * @constructor
+ * @param {Object} options Options of the current file.
+ * @param {Object} loadOptions Options for loading the stream.
+ */
+function ZipEntry(options, loadOptions) {
+ this.options = options;
+ this.loadOptions = loadOptions;
+}
+ZipEntry.prototype = {
+ /**
+ * say if the file is encrypted.
+ * @return {boolean} true if the file is encrypted, false otherwise.
+ */
+ isEncrypted: function() {
+ // bit 1 is set
+ return (this.bitFlag & 0x0001) === 0x0001;
+ },
+ /**
+ * say if the file has utf-8 filename/comment.
+ * @return {boolean} true if the filename/comment is in utf-8, false otherwise.
+ */
+ useUTF8: function() {
+ // bit 11 is set
+ return (this.bitFlag & 0x0800) === 0x0800;
+ },
+ /**
+ * Prepare the function used to generate the compressed content from this ZipFile.
+ * @param {DataReader} reader the reader to use.
+ * @param {number} from the offset from where we should read the data.
+ * @param {number} length the length of the data to read.
+ * @return {Function} the callback to get the compressed content (the type depends of the DataReader class).
+ */
+ prepareCompressedContent: function(reader, from, length) {
+ return function() {
+ var previousIndex = reader.index;
+ reader.setIndex(from);
+ var compressedFileData = reader.readData(length);
+ reader.setIndex(previousIndex);
+
+ return compressedFileData;
+ };
+ },
+ /**
+ * Prepare the function used to generate the uncompressed content from this ZipFile.
+ * @param {DataReader} reader the reader to use.
+ * @param {number} from the offset from where we should read the data.
+ * @param {number} length the length of the data to read.
+ * @param {JSZip.compression} compression the compression used on this file.
+ * @param {number} uncompressedSize the uncompressed size to expect.
+ * @return {Function} the callback to get the uncompressed content (the type depends of the DataReader class).
+ */
+ prepareContent: function(reader, from, length, compression, uncompressedSize) {
+ return function() {
+
+ var compressedFileData = utils.transformTo(compression.uncompressInputType, this.getCompressedContent());
+ var uncompressedFileData = compression.uncompress(compressedFileData);
+
+ if (uncompressedFileData.length !== uncompressedSize) {
+ throw new Error("Bug : uncompressed data size mismatch");
+ }
+
+ return uncompressedFileData;
+ };
+ },
+ /**
+ * Read the local part of a zip file and add the info in this object.
+ * @param {DataReader} reader the reader to use.
+ */
+ readLocalPart: function(reader) {
+ var compression, localExtraFieldsLength;
+
+ // we already know everything from the central dir !
+ // If the central dir data are false, we are doomed.
+ // On the bright side, the local part is scary : zip64, data descriptors, both, etc.
+ // The less data we get here, the more reliable this should be.
+ // Let's skip the whole header and dash to the data !
+ reader.skip(22);
+ // in some zip created on windows, the filename stored in the central dir contains \ instead of /.
+ // Strangely, the filename here is OK.
+ // I would love to treat these zip files as corrupted (see http://www.info-zip.org/FAQ.html#backslashes
+ // or APPNOTE#4.4.17.1, "All slashes MUST be forward slashes '/'") but there are a lot of bad zip generators...
+ // Search "unzip mismatching "local" filename continuing with "central" filename version" on
+ // the internet.
+ //
+ // I think I see the logic here : the central directory is used to display
+ // content and the local directory is used to extract the files. Mixing / and \
+ // may be used to display \ to windows users and use / when extracting the files.
+ // Unfortunately, this lead also to some issues : http://seclists.org/fulldisclosure/2009/Sep/394
+ this.fileNameLength = reader.readInt(2);
+ localExtraFieldsLength = reader.readInt(2); // can't be sure this will be the same as the central dir
+ this.fileName = reader.readString(this.fileNameLength);
+ reader.skip(localExtraFieldsLength);
+
+ if (this.compressedSize == -1 || this.uncompressedSize == -1) {
+ throw new Error("Bug or corrupted zip : didn't get enough informations from the central directory " + "(compressedSize == -1 || uncompressedSize == -1)");
+ }
+
+ compression = utils.findCompression(this.compressionMethod);
+ if (compression === null) { // no compression found
+ throw new Error("Corrupted zip : compression " + utils.pretty(this.compressionMethod) + " unknown (inner file : " + this.fileName + ")");
+ }
+ this.decompressed = new CompressedObject();
+ this.decompressed.compressedSize = this.compressedSize;
+ this.decompressed.uncompressedSize = this.uncompressedSize;
+ this.decompressed.crc32 = this.crc32;
+ this.decompressed.compressionMethod = this.compressionMethod;
+ this.decompressed.getCompressedContent = this.prepareCompressedContent(reader, reader.index, this.compressedSize, compression);
+ this.decompressed.getContent = this.prepareContent(reader, reader.index, this.compressedSize, compression, this.uncompressedSize);
+
+ // we need to compute the crc32...
+ if (this.loadOptions.checkCRC32) {
+ this.decompressed = utils.transformTo("string", this.decompressed.getContent());
+ if (jszipProto.crc32(this.decompressed) !== this.crc32) {
+ throw new Error("Corrupted zip : CRC32 mismatch");
+ }
+ }
+ },
+
+ /**
+ * Read the central part of a zip file and add the info in this object.
+ * @param {DataReader} reader the reader to use.
+ */
+ readCentralPart: function(reader) {
+ this.versionMadeBy = reader.readInt(2);
+ this.versionNeeded = reader.readInt(2);
+ this.bitFlag = reader.readInt(2);
+ this.compressionMethod = reader.readString(2);
+ this.date = reader.readDate();
+ this.crc32 = reader.readInt(4);
+ this.compressedSize = reader.readInt(4);
+ this.uncompressedSize = reader.readInt(4);
+ this.fileNameLength = reader.readInt(2);
+ this.extraFieldsLength = reader.readInt(2);
+ this.fileCommentLength = reader.readInt(2);
+ this.diskNumberStart = reader.readInt(2);
+ this.internalFileAttributes = reader.readInt(2);
+ this.externalFileAttributes = reader.readInt(4);
+ this.localHeaderOffset = reader.readInt(4);
+
+ if (this.isEncrypted()) {
+ throw new Error("Encrypted zip are not supported");
+ }
+
+ this.fileName = reader.readString(this.fileNameLength);
+ this.readExtraFields(reader);
+ this.parseZIP64ExtraField(reader);
+ this.fileComment = reader.readString(this.fileCommentLength);
+ },
+
+ /**
+ * Parse the external file attributes and get the unix/dos permissions.
+ */
+ processAttributes: function () {
+ this.unixPermissions = null;
+ this.dosPermissions = null;
+ var madeBy = this.versionMadeBy >> 8;
+
+ // Check if we have the DOS directory flag set.
+ // We look for it in the DOS and UNIX permissions
+ // but some unknown platform could set it as a compatibility flag.
+ this.dir = this.externalFileAttributes & 0x0010 ? true : false;
+
+ if(madeBy === MADE_BY_DOS) {
+ // first 6 bits (0 to 5)
+ this.dosPermissions = this.externalFileAttributes & 0x3F;
+ }
+
+ if(madeBy === MADE_BY_UNIX) {
+ this.unixPermissions = (this.externalFileAttributes >> 16) & 0xFFFF;
+ // the octal permissions are in (this.unixPermissions & 0x01FF).toString(8);
+ }
+
+ // fail safe : if the name ends with a / it probably means a folder
+ if (!this.dir && this.fileName.slice(-1) === '/') {
+ this.dir = true;
+ }
+ },
+
+ /**
+ * Parse the ZIP64 extra field and merge the info in the current ZipEntry.
+ * @param {DataReader} reader the reader to use.
+ */
+ parseZIP64ExtraField: function(reader) {
+
+ if (!this.extraFields[0x0001]) {
+ return;
+ }
+
+ // should be something, preparing the extra reader
+ var extraReader = new StringReader(this.extraFields[0x0001].value);
+
+ // I really hope that these 64bits integer can fit in 32 bits integer, because js
+ // won't let us have more.
+ if (this.uncompressedSize === utils.MAX_VALUE_32BITS) {
+ this.uncompressedSize = extraReader.readInt(8);
+ }
+ if (this.compressedSize === utils.MAX_VALUE_32BITS) {
+ this.compressedSize = extraReader.readInt(8);
+ }
+ if (this.localHeaderOffset === utils.MAX_VALUE_32BITS) {
+ this.localHeaderOffset = extraReader.readInt(8);
+ }
+ if (this.diskNumberStart === utils.MAX_VALUE_32BITS) {
+ this.diskNumberStart = extraReader.readInt(4);
+ }
+ },
+ /**
+ * Read the central part of a zip file and add the info in this object.
+ * @param {DataReader} reader the reader to use.
+ */
+ readExtraFields: function(reader) {
+ var start = reader.index,
+ extraFieldId,
+ extraFieldLength,
+ extraFieldValue;
+
+ this.extraFields = this.extraFields || {};
+
+ while (reader.index < start + this.extraFieldsLength) {
+ extraFieldId = reader.readInt(2);
+ extraFieldLength = reader.readInt(2);
+ extraFieldValue = reader.readString(extraFieldLength);
+
+ this.extraFields[extraFieldId] = {
+ id: extraFieldId,
+ length: extraFieldLength,
+ value: extraFieldValue
+ };
+ }
+ },
+ /**
+ * Apply an UTF8 transformation if needed.
+ */
+ handleUTF8: function() {
+ if (this.useUTF8()) {
+ this.fileName = jszipProto.utf8decode(this.fileName);
+ this.fileComment = jszipProto.utf8decode(this.fileComment);
+ } else {
+ var upath = this.findExtraFieldUnicodePath();
+ if (upath !== null) {
+ this.fileName = upath;
+ }
+ var ucomment = this.findExtraFieldUnicodeComment();
+ if (ucomment !== null) {
+ this.fileComment = ucomment;
+ }
+ }
+ },
+
+ /**
+ * Find the unicode path declared in the extra field, if any.
+ * @return {String} the unicode path, null otherwise.
+ */
+ findExtraFieldUnicodePath: function() {
+ var upathField = this.extraFields[0x7075];
+ if (upathField) {
+ var extraReader = new StringReader(upathField.value);
+
+ // wrong version
+ if (extraReader.readInt(1) !== 1) {
+ return null;
+ }
+
+ // the crc of the filename changed, this field is out of date.
+ if (jszipProto.crc32(this.fileName) !== extraReader.readInt(4)) {
+ return null;
+ }
+
+ return jszipProto.utf8decode(extraReader.readString(upathField.length - 5));
+ }
+ return null;
+ },
+
+ /**
+ * Find the unicode comment declared in the extra field, if any.
+ * @return {String} the unicode comment, null otherwise.
+ */
+ findExtraFieldUnicodeComment: function() {
+ var ucommentField = this.extraFields[0x6375];
+ if (ucommentField) {
+ var extraReader = new StringReader(ucommentField.value);
+
+ // wrong version
+ if (extraReader.readInt(1) !== 1) {
+ return null;
+ }
+
+ // the crc of the comment changed, this field is out of date.
+ if (jszipProto.crc32(this.fileComment) !== extraReader.readInt(4)) {
+ return null;
+ }
+
+ return jszipProto.utf8decode(extraReader.readString(ucommentField.length - 5));
+ }
+ return null;
+ }
+};
+module.exports = ZipEntry;
Code Review / src / app-framework-demo.git / blobdiff