89 lines
3.1 KiB
JavaScript
89 lines
3.1 KiB
JavaScript
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"use strict";
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var utils = require("./utils");
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var external = require("./external");
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var utf8 = require("./utf8");
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var ZipEntries = require("./zipEntries");
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var Crc32Probe = require("./stream/Crc32Probe");
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var nodejsUtils = require("./nodejsUtils");
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/**
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* Check the CRC32 of an entry.
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* @param {ZipEntry} zipEntry the zip entry to check.
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* @return {Promise} the result.
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*/
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function checkEntryCRC32(zipEntry) {
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return new external.Promise(function (resolve, reject) {
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var worker = zipEntry.decompressed.getContentWorker().pipe(new Crc32Probe());
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worker.on("error", function (e) {
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reject(e);
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})
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.on("end", function () {
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if (worker.streamInfo.crc32 !== zipEntry.decompressed.crc32) {
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reject(new Error("Corrupted zip : CRC32 mismatch"));
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} else {
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resolve();
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}
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})
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.resume();
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});
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}
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module.exports = function (data, options) {
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var zip = this;
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options = utils.extend(options || {}, {
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base64: false,
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checkCRC32: false,
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optimizedBinaryString: false,
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createFolders: false,
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decodeFileName: utf8.utf8decode
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});
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if (nodejsUtils.isNode && nodejsUtils.isStream(data)) {
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return external.Promise.reject(new Error("JSZip can't accept a stream when loading a zip file."));
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}
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return utils.prepareContent("the loaded zip file", data, true, options.optimizedBinaryString, options.base64)
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.then(function (data) {
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var zipEntries = new ZipEntries(options);
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zipEntries.load(data);
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return zipEntries;
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}).then(function checkCRC32(zipEntries) {
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var promises = [external.Promise.resolve(zipEntries)];
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var files = zipEntries.files;
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if (options.checkCRC32) {
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for (var i = 0; i < files.length; i++) {
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promises.push(checkEntryCRC32(files[i]));
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}
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}
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return external.Promise.all(promises);
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}).then(function addFiles(results) {
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var zipEntries = results.shift();
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var files = zipEntries.files;
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for (var i = 0; i < files.length; i++) {
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var input = files[i];
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var unsafeName = input.fileNameStr;
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var safeName = utils.resolve(input.fileNameStr);
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zip.file(safeName, input.decompressed, {
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binary: true,
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optimizedBinaryString: true,
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date: input.date,
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dir: input.dir,
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comment: input.fileCommentStr.length ? input.fileCommentStr : null,
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unixPermissions: input.unixPermissions,
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dosPermissions: input.dosPermissions,
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createFolders: options.createFolders
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});
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if (!input.dir) {
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zip.file(safeName).unsafeOriginalName = unsafeName;
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}
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}
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if (zipEntries.zipComment.length) {
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zip.comment = zipEntries.zipComment;
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}
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return zip;
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});
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};
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