Demo for query storing
Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/yauzl/LICENSE b/node_modules/yauzl/LICENSE
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+The MIT License (MIT)
+
+Copyright (c) 2014 Josh Wolfe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/node_modules/yauzl/README.md b/node_modules/yauzl/README.md
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+# yauzl
+
+[](https://travis-ci.org/thejoshwolfe/yauzl)
+[](https://coveralls.io/r/thejoshwolfe/yauzl)
+
+yet another unzip library for node. For zipping, see
+[yazl](https://github.com/thejoshwolfe/yazl).
+
+Design principles:
+
+ * Follow the spec.
+ Don't scan for local file headers.
+ Read the central directory for file metadata.
+ (see [No Streaming Unzip API](#no-streaming-unzip-api)).
+ * Don't block the JavaScript thread.
+ Use and provide async APIs.
+ * Keep memory usage under control.
+ Don't attempt to buffer entire files in RAM at once.
+ * Never crash (if used properly).
+ Don't let malformed zip files bring down client applications who are trying to catch errors.
+ * Catch unsafe file names.
+ See `validateFileName()`.
+
+## Usage
+
+```js
+var yauzl = require("yauzl");
+
+yauzl.open("path/to/file.zip", {lazyEntries: true}, function(err, zipfile) {
+ if (err) throw err;
+ zipfile.readEntry();
+ zipfile.on("entry", function(entry) {
+ if (/\/$/.test(entry.fileName)) {
+ // Directory file names end with '/'.
+ // Note that entires for directories themselves are optional.
+ // An entry's fileName implicitly requires its parent directories to exist.
+ zipfile.readEntry();
+ } else {
+ // file entry
+ zipfile.openReadStream(entry, function(err, readStream) {
+ if (err) throw err;
+ readStream.on("end", function() {
+ zipfile.readEntry();
+ });
+ readStream.pipe(somewhere);
+ });
+ }
+ });
+});
+```
+
+See also `examples/` for more usage examples.
+
+## API
+
+The default for every optional `callback` parameter is:
+
+```js
+function defaultCallback(err) {
+ if (err) throw err;
+}
+```
+
+### open(path, [options], [callback])
+
+Calls `fs.open(path, "r")` and reads the `fd` effectively the same as `fromFd()` would.
+
+`options` may be omitted or `null`. The defaults are `{autoClose: true, lazyEntries: false, decodeStrings: true, validateEntrySizes: true, strictFileNames: false}`.
+
+`autoClose` is effectively equivalent to:
+
+```js
+zipfile.once("end", function() {
+ zipfile.close();
+});
+```
+
+`lazyEntries` indicates that entries should be read only when `readEntry()` is called.
+If `lazyEntries` is `false`, `entry` events will be emitted as fast as possible to allow `pipe()`ing
+file data from all entries in parallel.
+This is not recommended, as it can lead to out of control memory usage for zip files with many entries.
+See [issue #22](https://github.com/thejoshwolfe/yauzl/issues/22).
+If `lazyEntries` is `true`, an `entry` or `end` event will be emitted in response to each call to `readEntry()`.
+This allows processing of one entry at a time, and will keep memory usage under control for zip files with many entries.
+
+`decodeStrings` is the default and causes yauzl to decode strings with `CP437` or `UTF-8` as required by the spec.
+The exact effects of turning this option off are:
+
+* `zipfile.comment`, `entry.fileName`, and `entry.fileComment` will be `Buffer` objects instead of `String`s.
+* Any Info-ZIP Unicode Path Extra Field will be ignored. See `extraFields`.
+* Automatic file name validation will not be performed. See `validateFileName()`.
+
+`validateEntrySizes` is the default and ensures that an entry's reported uncompressed size matches its actual uncompressed size.
+This check happens as early as possible, which is either before emitting each `"entry"` event (for entries with no compression),
+or during the `readStream` piping after calling `openReadStream()`.
+See `openReadStream()` for more information on defending against zip bomb attacks.
+
+When `strictFileNames` is `false` (the default) and `decodeStrings` is `true`,
+all backslash (`\`) characters in each `entry.fileName` are replaced with forward slashes (`/`).
+The spec forbids file names with backslashes,
+but Microsoft's `System.IO.Compression.ZipFile` class in .NET versions 4.5.0 until 4.6.1
+creates non-conformant zipfiles with backslashes in file names.
+`strictFileNames` is `false` by default so that clients can read these
+non-conformant zipfiles without knowing about this Microsoft-specific bug.
+When `strictFileNames` is `true` and `decodeStrings` is `true`,
+entries with backslashes in their file names will result in an error. See `validateFileName()`.
+When `decodeStrings` is `false`, `strictFileNames` has no effect.
+
+The `callback` is given the arguments `(err, zipfile)`.
+An `err` is provided if the End of Central Directory Record cannot be found, or if its metadata appears malformed.
+This kind of error usually indicates that this is not a zip file.
+Otherwise, `zipfile` is an instance of `ZipFile`.
+
+### fromFd(fd, [options], [callback])
+
+Reads from the fd, which is presumed to be an open .zip file.
+Note that random access is required by the zip file specification,
+so the fd cannot be an open socket or any other fd that does not support random access.
+
+`options` may be omitted or `null`. The defaults are `{autoClose: false, lazyEntries: false, decodeStrings: true, validateEntrySizes: true, strictFileNames: false}`.
+
+See `open()` for the meaning of the options and callback.
+
+### fromBuffer(buffer, [options], [callback])
+
+Like `fromFd()`, but reads from a RAM buffer instead of an open file.
+`buffer` is a `Buffer`.
+
+If a `ZipFile` is acquired from this method,
+it will never emit the `close` event,
+and calling `close()` is not necessary.
+
+`options` may be omitted or `null`. The defaults are `{lazyEntries: false, decodeStrings: true, validateEntrySizes: true, strictFileNames: false}`.
+
+See `open()` for the meaning of the options and callback.
+The `autoClose` option is ignored for this method.
+
+### fromRandomAccessReader(reader, totalSize, [options], [callback])
+
+This method of reading a zip file allows clients to implement their own back-end file system.
+For example, a client might translate read calls into network requests.
+
+The `reader` parameter must be of a type that is a subclass of
+[RandomAccessReader](#class-randomaccessreader) that implements the required methods.
+The `totalSize` is a Number and indicates the total file size of the zip file.
+
+`options` may be omitted or `null`. The defaults are `{autoClose: true, lazyEntries: false, decodeStrings: true, validateEntrySizes: true, strictFileNames: false}`.
+
+See `open()` for the meaning of the options and callback.
+
+### dosDateTimeToDate(date, time)
+
+Converts MS-DOS `date` and `time` data into a JavaScript `Date` object.
+Each parameter is a `Number` treated as an unsigned 16-bit integer.
+Note that this format does not support timezones,
+so the returned object will use the local timezone.
+
+### validateFileName(fileName)
+
+Returns `null` or a `String` error message depending on the validity of `fileName`.
+If `fileName` starts with `"/"` or `/[A-Za-z]:\//` or if it contains `".."` path segments or `"\\"`,
+this function returns an error message appropriate for use like this:
+
+```js
+var errorMessage = yauzl.validateFileName(fileName);
+if (errorMessage != null) throw new Error(errorMessage);
+```
+
+This function is automatically run for each entry, as long as `decodeStrings` is `true`.
+See `open()`, `strictFileNames`, and `Event: "entry"` for more information.
+
+### Class: ZipFile
+
+The constructor for the class is not part of the public API.
+Use `open()`, `fromFd()`, `fromBuffer()`, or `fromRandomAccessReader()` instead.
+
+#### Event: "entry"
+
+Callback gets `(entry)`, which is an `Entry`.
+See `open()` and `readEntry()` for when this event is emitted.
+
+If `decodeStrings` is `true`, entries emitted via this event have already passed file name validation.
+See `validateFileName()` and `open()` for more information.
+
+If `validateEntrySizes` is `true` and this entry's `compressionMethod` is `0` (stored without compression),
+this entry has already passed entry size validation.
+See `open()` for more information.
+
+#### Event: "end"
+
+Emitted after the last `entry` event has been emitted.
+See `open()` and `readEntry()` for more info on when this event is emitted.
+
+#### Event: "close"
+
+Emitted after the fd is actually closed.
+This is after calling `close()` (or after the `end` event when `autoClose` is `true`),
+and after all stream pipelines created from `openReadStream()` have finished reading data from the fd.
+
+If this `ZipFile` was acquired from `fromRandomAccessReader()`,
+the "fd" in the previous paragraph refers to the `RandomAccessReader` implemented by the client.
+
+If this `ZipFile` was acquired from `fromBuffer()`, this event is never emitted.
+
+#### Event: "error"
+
+Emitted in the case of errors with reading the zip file.
+(Note that other errors can be emitted from the streams created from `openReadStream()` as well.)
+After this event has been emitted, no further `entry`, `end`, or `error` events will be emitted,
+but the `close` event may still be emitted.
+
+#### readEntry()
+
+Causes this `ZipFile` to emit an `entry` or `end` event (or an `error` event).
+This method must only be called when this `ZipFile` was created with the `lazyEntries` option set to `true` (see `open()`).
+When this `ZipFile` was created with the `lazyEntries` option set to `true`,
+`entry` and `end` events are only ever emitted in response to this method call.
+
+The event that is emitted in response to this method will not be emitted until after this method has returned,
+so it is safe to call this method before attaching event listeners.
+
+After calling this method, calling this method again before the response event has been emitted will cause undefined behavior.
+Calling this method after the `end` event has been emitted will cause undefined behavior.
+Calling this method after calling `close()` will cause undefined behavior.
+
+#### openReadStream(entry, [options], callback)
+
+`entry` must be an `Entry` object from this `ZipFile`.
+`callback` gets `(err, readStream)`, where `readStream` is a `Readable Stream` that provides the file data for this entry.
+If this zipfile is already closed (see `close()`), the `callback` will receive an `err`.
+
+`options` may be omitted or `null`, and has the following defaults:
+
+```js
+{
+ decompress: entry.isCompressed() ? true : null,
+ decrypt: null,
+ start: 0, // actually the default is null, see below
+ end: entry.compressedSize, // actually the default is null, see below
+}
+```
+
+If the entry is compressed (with a supported compression method),
+and the `decompress` option is `true` (or omitted),
+the read stream provides the decompressed data.
+Omitting the `decompress` option is what most clients should do.
+
+The `decompress` option must be `null` (or omitted) when the entry is not compressed (see `isCompressed()`),
+and either `true` (or omitted) or `false` when the entry is compressed.
+Specifying `decompress: false` for a compressed entry causes the read stream
+to provide the raw compressed file data without going through a zlib inflate transform.
+
+If the entry is encrypted (see `isEncrypted()`), clients may want to avoid calling `openReadStream()` on the entry entirely.
+Alternatively, clients may call `openReadStream()` for encrypted entries and specify `decrypt: false`.
+If the entry is also compressed, clients must *also* specify `decompress: false`.
+Specifying `decrypt: false` for an encrypted entry causes the read stream to provide the raw, still-encrypted file data.
+(This data includes the 12-byte header described in the spec.)
+
+The `decrypt` option must be `null` (or omitted) for non-encrypted entries, and `false` for encrypted entries.
+Omitting the `decrypt` option (or specifying it as `null`) for an encrypted entry
+will result in the `callback` receiving an `err`.
+This default behavior is so that clients not accounting for encrypted files aren't surprised by bogus file data.
+
+The `start` (inclusive) and `end` (exclusive) options are byte offsets into this entry's file data,
+and can be used to obtain part of an entry's file data rather than the whole thing.
+If either of these options are specified and non-`null`,
+then the above options must be used to obain the file's raw data.
+Speficying `{start: 0, end: entry.compressedSize}` will result in the complete file,
+which is effectively the default values for these options,
+but note that unlike omitting the options, when you specify `start` or `end` as any non-`null` value,
+the above requirement is still enforced that you must also pass the appropriate options to get the file's raw data.
+
+It's possible for the `readStream` provided to the `callback` to emit errors for several reasons.
+For example, if zlib cannot decompress the data, the zlib error will be emitted from the `readStream`.
+Two more error cases (when `validateEntrySizes` is `true`) are if the decompressed data has too many
+or too few actual bytes compared to the reported byte count from the entry's `uncompressedSize` field.
+yauzl notices this false information and emits an error from the `readStream`
+after some number of bytes have already been piped through the stream.
+
+This check allows clients to trust the `uncompressedSize` field in `Entry` objects.
+Guarding against [zip bomb](http://en.wikipedia.org/wiki/Zip_bomb) attacks can be accomplished by
+doing some heuristic checks on the size metadata and then watching out for the above errors.
+Such heuristics are outside the scope of this library,
+but enforcing the `uncompressedSize` is implemented here as a security feature.
+
+It is possible to destroy the `readStream` before it has piped all of its data.
+To do this, call `readStream.destroy()`.
+You must `unpipe()` the `readStream` from any destination before calling `readStream.destroy()`.
+If this zipfile was created using `fromRandomAccessReader()`, the `RandomAccessReader` implementation
+must provide readable streams that implement a `.destroy()` method (see `randomAccessReader._readStreamForRange()`)
+in order for calls to `readStream.destroy()` to work in this context.
+
+#### close()
+
+Causes all future calls to `openReadStream()` to fail,
+and closes the fd, if any, after all streams created by `openReadStream()` have emitted their `end` events.
+
+If the `autoClose` option is set to `true` (see `open()`),
+this function will be called automatically effectively in response to this object's `end` event.
+
+If the `lazyEntries` option is set to `false` (see `open()`) and this object's `end` event has not been emitted yet,
+this function causes undefined behavior.
+If the `lazyEntries` option is set to `true`,
+you can call this function instead of calling `readEntry()` to abort reading the entries of a zipfile.
+
+It is safe to call this function multiple times; after the first call, successive calls have no effect.
+This includes situations where the `autoClose` option effectively calls this function for you.
+
+If `close()` is never called, then the zipfile is "kept open".
+For zipfiles created with `fromFd()`, this will leave the `fd` open, which may be desirable.
+For zipfiles created with `open()`, this will leave the underlying `fd` open, thereby "leaking" it, which is probably undesirable.
+For zipfiles created with `fromRandomAccessReader()`, the reader's `close()` method will never be called.
+For zipfiles created with `fromBuffer()`, the `close()` function has no effect whether called or not.
+
+Regardless of how this `ZipFile` was created, there are no resources other than those listed above that require cleanup from this function.
+This means it may be desirable to never call `close()` in some usecases.
+
+#### isOpen
+
+`Boolean`. `true` until `close()` is called; then it's `false`.
+
+#### entryCount
+
+`Number`. Total number of central directory records.
+
+#### comment
+
+`String`. Always decoded with `CP437` per the spec.
+
+If `decodeStrings` is `false` (see `open()`), this field is the undecoded `Buffer` instead of a decoded `String`.
+
+### Class: Entry
+
+Objects of this class represent Central Directory Records.
+Refer to the zipfile specification for more details about these fields.
+
+These fields are of type `Number`:
+
+ * `versionMadeBy`
+ * `versionNeededToExtract`
+ * `generalPurposeBitFlag`
+ * `compressionMethod`
+ * `lastModFileTime` (MS-DOS format, see `getLastModDateTime`)
+ * `lastModFileDate` (MS-DOS format, see `getLastModDateTime`)
+ * `crc32`
+ * `compressedSize`
+ * `uncompressedSize`
+ * `fileNameLength` (bytes)
+ * `extraFieldLength` (bytes)
+ * `fileCommentLength` (bytes)
+ * `internalFileAttributes`
+ * `externalFileAttributes`
+ * `relativeOffsetOfLocalHeader`
+
+#### fileName
+
+`String`.
+Following the spec, the bytes for the file name are decoded with
+`UTF-8` if `generalPurposeBitFlag & 0x800`, otherwise with `CP437`.
+Alternatively, this field may be populated from the Info-ZIP Unicode Path Extra Field
+(see `extraFields`).
+
+This field is automatically validated by `validateFileName()` before yauzl emits an "entry" event.
+If this field would contain unsafe characters, yauzl emits an error instead of an entry.
+
+If `decodeStrings` is `false` (see `open()`), this field is the undecoded `Buffer` instead of a decoded `String`.
+Therefore, `generalPurposeBitFlag` and any Info-ZIP Unicode Path Extra Field are ignored.
+Furthermore, no automatic file name validation is performed for this file name.
+
+#### extraFields
+
+`Array` with each entry in the form `{id: id, data: data}`,
+where `id` is a `Number` and `data` is a `Buffer`.
+
+This library looks for and reads the ZIP64 Extended Information Extra Field (0x0001)
+in order to support ZIP64 format zip files.
+
+This library also looks for and reads the Info-ZIP Unicode Path Extra Field (0x7075)
+in order to support some zipfiles that use it instead of General Purpose Bit 11
+to convey `UTF-8` file names.
+When the field is identified and verified to be reliable (see the zipfile spec),
+the the file name in this field is stored in the `fileName` property,
+and the file name in the central directory record for this entry is ignored.
+Note that when `decodeStrings` is false, all Info-ZIP Unicode Path Extra Fields are ignored.
+
+None of the other fields are considered significant by this library.
+Fields that this library reads are left unalterned in the `extraFields` array.
+
+#### fileComment
+
+`String` decoded with the charset indicated by `generalPurposeBitFlag & 0x800` as with the `fileName`.
+(The Info-ZIP Unicode Path Extra Field has no effect on the charset used for this field.)
+
+If `decodeStrings` is `false` (see `open()`), this field is the undecoded `Buffer` instead of a decoded `String`.
+
+Prior to yauzl version 2.7.0, this field was erroneously documented as `comment` instead of `fileComment`.
+For compatibility with any code that uses the field name `comment`,
+yauzl creates an alias field named `comment` which is identical to `fileComment`.
+
+#### getLastModDate()
+
+Effectively implemented as:
+
+```js
+return dosDateTimeToDate(this.lastModFileDate, this.lastModFileTime);
+```
+
+#### isEncrypted()
+
+Returns is this entry encrypted with "Traditional Encryption".
+Effectively implemented as:
+
+```js
+return (this.generalPurposeBitFlag & 0x1) !== 0;
+```
+
+See `openReadStream()` for the implications of this value.
+
+Note that "Strong Encryption" is not supported, and will result in an `"error"` event emitted from the `ZipFile`.
+
+#### isCompressed()
+
+Effectively implemented as:
+
+```js
+return this.compressionMethod === 8;
+```
+
+See `openReadStream()` for the implications of this value.
+
+### Class: RandomAccessReader
+
+This class is meant to be subclassed by clients and instantiated for the `fromRandomAccessReader()` function.
+
+An example implementation can be found in `test/test.js`.
+
+#### randomAccessReader._readStreamForRange(start, end)
+
+Subclasses *must* implement this method.
+
+`start` and `end` are Numbers and indicate byte offsets from the start of the file.
+`end` is exclusive, so `_readStreamForRange(0x1000, 0x2000)` would indicate to read `0x1000` bytes.
+`end - start` will always be at least `1`.
+
+This method should return a readable stream which will be `pipe()`ed into another stream.
+It is expected that the readable stream will provide data in several chunks if necessary.
+If the readable stream provides too many or too few bytes, an error will be emitted.
+(Note that `validateEntrySizes` has no effect on this check,
+because this is a low-level API that should behave correctly regardless of the contents of the file.)
+Any errors emitted on the readable stream will be handled and re-emitted on the client-visible stream
+(returned from `zipfile.openReadStream()`) or provided as the `err` argument to the appropriate callback
+(for example, for `fromRandomAccessReader()`).
+
+The returned stream *must* implement a method `.destroy()`
+if you call `readStream.destroy()` on streams you get from `openReadStream()`.
+If you never call `readStream.destroy()`, then streams returned from this method do not need to implement a method `.destroy()`.
+`.destroy()` should abort any streaming that is in progress and clean up any associated resources.
+`.destroy()` will only be called after the stream has been `unpipe()`d from its destination.
+
+Note that the stream returned from this method might not be the same object that is provided by `openReadStream()`.
+The stream returned from this method might be `pipe()`d through one or more filter streams (for example, a zlib inflate stream).
+
+#### randomAccessReader.read(buffer, offset, length, position, callback)
+
+Subclasses may implement this method.
+The default implementation uses `createReadStream()` to fill the `buffer`.
+
+This method should behave like `fs.read()`.
+
+#### randomAccessReader.close(callback)
+
+Subclasses may implement this method.
+The default implementation is effectively `setImmediate(callback);`.
+
+`callback` takes parameters `(err)`.
+
+This method is called once the all streams returned from `_readStreamForRange()` have ended,
+and no more `_readStreamForRange()` or `read()` requests will be issued to this object.
+
+## How to Avoid Crashing
+
+When a malformed zipfile is encountered, the default behavior is to crash (throw an exception).
+If you want to handle errors more gracefully than this,
+be sure to do the following:
+
+ * Provide `callback` parameters where they are allowed, and check the `err` parameter.
+ * Attach a listener for the `error` event on any `ZipFile` object you get from `open()`, `fromFd()`, `fromBuffer()`, or `fromRandomAccessReader()`.
+ * Attach a listener for the `error` event on any stream you get from `openReadStream()`.
+
+Minor version updates to yauzl will not add any additional requirements to this list.
+
+## Limitations
+
+### No Streaming Unzip API
+
+Due to the design of the .zip file format, it's impossible to interpret a .zip file from start to finish
+(such as from a readable stream) without sacrificing correctness.
+The Central Directory, which is the authority on the contents of the .zip file, is at the end of a .zip file, not the beginning.
+A streaming API would need to either buffer the entire .zip file to get to the Central Directory before interpreting anything
+(defeating the purpose of a streaming interface), or rely on the Local File Headers which are interspersed through the .zip file.
+However, the Local File Headers are explicitly denounced in the spec as being unreliable copies of the Central Directory,
+so trusting them would be a violation of the spec.
+
+Any library that offers a streaming unzip API must make one of the above two compromises,
+which makes the library either dishonest or nonconformant (usually the latter).
+This library insists on correctness and adherence to the spec, and so does not offer a streaming API.
+
+Here is a way to create a spec-conformant .zip file using the `zip` command line program (Info-ZIP)
+available in most unix-like environments, that is (nearly) impossible to parse correctly with a streaming parser:
+
+```
+$ echo -ne '\x50\x4b\x07\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' > file.txt
+$ zip -q0 - file.txt | cat > out.zip
+```
+
+This .zip file contains a single file entry that uses General Purpose Bit 3,
+which means the Local File Header doesn't know the size of the file.
+Any streaming parser that encounters this situation will either immediately fail,
+or attempt to search for the Data Descriptor after the file's contents.
+The file's contents is a sequence of 16-bytes crafted to exactly mimic a valid Data Descriptor for an empty file,
+which will fool any parser that gets this far into thinking that the file is empty rather than containing 16-bytes.
+What follows the file's real contents is the file's real Data Descriptor,
+which will likely cause some kind of signature mismatch error for a streaming parser (if one hasn't occurred already).
+
+By using General Purpose Bit 3 (and compression method 0),
+it's possible to create arbitrarily ambiguous .zip files that
+distract parsers with file contents that contain apparently valid .zip file metadata.
+
+### Limitted ZIP64 Support
+
+For ZIP64, only zip files smaller than `8PiB` are supported,
+not the full `16EiB` range that a 64-bit integer should be able to index.
+This is due to the JavaScript Number type being an IEEE 754 double precision float.
+
+The Node.js `fs` module probably has this same limitation.
+
+### ZIP64 Extensible Data Sector Is Ignored
+
+The spec does not allow zip file creators to put arbitrary data here,
+but rather reserves its use for PKWARE and mentions something about Z390.
+This doesn't seem useful to expose in this library, so it is ignored.
+
+### No Multi-Disk Archive Support
+
+This library does not support multi-disk zip files.
+The multi-disk fields in the zipfile spec were intended for a zip file to span multiple floppy disks,
+which probably never happens now.
+If the "number of this disk" field in the End of Central Directory Record is not `0`,
+the `open()`, `fromFd()`, `fromBuffer()`, or `fromRandomAccessReader()` `callback` will receive an `err`.
+By extension the following zip file fields are ignored by this library and not provided to clients:
+
+ * Disk where central directory starts
+ * Number of central directory records on this disk
+ * Disk number where file starts
+
+### Limited Encryption Handling
+
+You can detect when a file entry is encrypted with "Traditional Encryption" via `isEncrypted()`,
+but yauzl will not help you decrypt it.
+See `openReadStream()`.
+
+If a zip file contains file entries encrypted with "Strong Encryption", yauzl emits an error.
+
+If the central directory is encrypted or compressed, yauzl emits an error.
+
+### Local File Headers Are Ignored
+
+Many unzip libraries mistakenly read the Local File Header data in zip files.
+This data is officially defined to be redundant with the Central Directory information,
+and is not to be trusted.
+Aside from checking the signature, yauzl ignores the content of the Local File Header.
+
+### No CRC-32 Checking
+
+This library provides the `crc32` field of `Entry` objects read from the Central Directory.
+However, this field is not used for anything in this library.
+
+### versionNeededToExtract Is Ignored
+
+The field `versionNeededToExtract` is ignored,
+because this library doesn't support the complete zip file spec at any version,
+
+### No Support For Obscure Compression Methods
+
+Regarding the `compressionMethod` field of `Entry` objects,
+only method `0` (stored with no compression)
+and method `8` (deflated) are supported.
+Any of the other 15 official methods will cause the `openReadStream()` `callback` to receive an `err`.
+
+### Data Descriptors Are Ignored
+
+There may or may not be Data Descriptor sections in a zip file.
+This library provides no support for finding or interpreting them.
+
+### Archive Extra Data Record Is Ignored
+
+There may or may not be an Archive Extra Data Record section in a zip file.
+This library provides no support for finding or interpreting it.
+
+### No Language Encoding Flag Support
+
+Zip files officially support charset encodings other than CP437 and UTF-8,
+but the zip file spec does not specify how it works.
+This library makes no attempt to interpret the Language Encoding Flag.
+
+## Change History
+
+ * 2.10.0
+ * Added support for non-conformant zipfiles created by Microsoft, and added option `strictFileNames` to disable the workaround. [issue #66](https://github.com/thejoshwolfe/yauzl/issues/66), [issue #88](https://github.com/thejoshwolfe/yauzl/issues/88)
+ * 2.9.2
+ * Removed `tools/hexdump-zip.js` and `tools/hex2bin.js`. Those tools are now located here: [thejoshwolfe/hexdump-zip](https://github.com/thejoshwolfe/hexdump-zip) and [thejoshwolfe/hex2bin](https://github.com/thejoshwolfe/hex2bin)
+ * Worked around performance problem with zlib when using `fromBuffer()` and `readStream.destroy()` for large compressed files. [issue #87](https://github.com/thejoshwolfe/yauzl/issues/87)
+ * 2.9.1
+ * Removed `console.log()` accidentally introduced in 2.9.0. [issue #64](https://github.com/thejoshwolfe/yauzl/issues/64)
+ * 2.9.0
+ * Throw an exception if `readEntry()` is called without `lazyEntries:true`. Previously this caused undefined behavior. [issue #63](https://github.com/thejoshwolfe/yauzl/issues/63)
+ * 2.8.0
+ * Added option `validateEntrySizes`. [issue #53](https://github.com/thejoshwolfe/yauzl/issues/53)
+ * Added `examples/promises.js`
+ * Added ability to read raw file data via `decompress` and `decrypt` options. [issue #11](https://github.com/thejoshwolfe/yauzl/issues/11), [issue #38](https://github.com/thejoshwolfe/yauzl/issues/38), [pull #39](https://github.com/thejoshwolfe/yauzl/pull/39)
+ * Added `start` and `end` options to `openReadStream()`. [issue #38](https://github.com/thejoshwolfe/yauzl/issues/38)
+ * 2.7.0
+ * Added option `decodeStrings`. [issue #42](https://github.com/thejoshwolfe/yauzl/issues/42)
+ * Fixed documentation for `entry.fileComment` and added compatibility alias. [issue #47](https://github.com/thejoshwolfe/yauzl/issues/47)
+ * 2.6.0
+ * Support Info-ZIP Unicode Path Extra Field, used by WinRAR for Chinese file names. [issue #33](https://github.com/thejoshwolfe/yauzl/issues/33)
+ * 2.5.0
+ * Ignore malformed Extra Field that is common in Android .apk files. [issue #31](https://github.com/thejoshwolfe/yauzl/issues/31)
+ * 2.4.3
+ * Fix crash when parsing malformed Extra Field buffers. [issue #31](https://github.com/thejoshwolfe/yauzl/issues/31)
+ * 2.4.2
+ * Remove .npmignore and .travis.yml from npm package.
+ * 2.4.1
+ * Fix error handling.
+ * 2.4.0
+ * Add ZIP64 support. [issue #6](https://github.com/thejoshwolfe/yauzl/issues/6)
+ * Add `lazyEntries` option. [issue #22](https://github.com/thejoshwolfe/yauzl/issues/22)
+ * Add `readStream.destroy()` method. [issue #26](https://github.com/thejoshwolfe/yauzl/issues/26)
+ * Add `fromRandomAccessReader()`. [issue #14](https://github.com/thejoshwolfe/yauzl/issues/14)
+ * Add `examples/unzip.js`.
+ * 2.3.1
+ * Documentation updates.
+ * 2.3.0
+ * Check that `uncompressedSize` is correct, or else emit an error. [issue #13](https://github.com/thejoshwolfe/yauzl/issues/13)
+ * 2.2.1
+ * Update dependencies.
+ * 2.2.0
+ * Update dependencies.
+ * 2.1.0
+ * Remove dependency on `iconv`.
+ * 2.0.3
+ * Fix crash when trying to read a 0-byte file.
+ * 2.0.2
+ * Fix event behavior after errors.
+ * 2.0.1
+ * Fix bug with using `iconv`.
+ * 2.0.0
+ * Initial release.
diff --git a/node_modules/yauzl/index.js b/node_modules/yauzl/index.js
new file mode 100644
index 0000000..cf5d70d
--- /dev/null
+++ b/node_modules/yauzl/index.js
@@ -0,0 +1,796 @@
+var fs = require("fs");
+var zlib = require("zlib");
+var fd_slicer = require("fd-slicer");
+var crc32 = require("buffer-crc32");
+var util = require("util");
+var EventEmitter = require("events").EventEmitter;
+var Transform = require("stream").Transform;
+var PassThrough = require("stream").PassThrough;
+var Writable = require("stream").Writable;
+
+exports.open = open;
+exports.fromFd = fromFd;
+exports.fromBuffer = fromBuffer;
+exports.fromRandomAccessReader = fromRandomAccessReader;
+exports.dosDateTimeToDate = dosDateTimeToDate;
+exports.validateFileName = validateFileName;
+exports.ZipFile = ZipFile;
+exports.Entry = Entry;
+exports.RandomAccessReader = RandomAccessReader;
+
+function open(path, options, callback) {
+ if (typeof options === "function") {
+ callback = options;
+ options = null;
+ }
+ if (options == null) options = {};
+ if (options.autoClose == null) options.autoClose = true;
+ if (options.lazyEntries == null) options.lazyEntries = false;
+ if (options.decodeStrings == null) options.decodeStrings = true;
+ if (options.validateEntrySizes == null) options.validateEntrySizes = true;
+ if (options.strictFileNames == null) options.strictFileNames = false;
+ if (callback == null) callback = defaultCallback;
+ fs.open(path, "r", function(err, fd) {
+ if (err) return callback(err);
+ fromFd(fd, options, function(err, zipfile) {
+ if (err) fs.close(fd, defaultCallback);
+ callback(err, zipfile);
+ });
+ });
+}
+
+function fromFd(fd, options, callback) {
+ if (typeof options === "function") {
+ callback = options;
+ options = null;
+ }
+ if (options == null) options = {};
+ if (options.autoClose == null) options.autoClose = false;
+ if (options.lazyEntries == null) options.lazyEntries = false;
+ if (options.decodeStrings == null) options.decodeStrings = true;
+ if (options.validateEntrySizes == null) options.validateEntrySizes = true;
+ if (options.strictFileNames == null) options.strictFileNames = false;
+ if (callback == null) callback = defaultCallback;
+ fs.fstat(fd, function(err, stats) {
+ if (err) return callback(err);
+ var reader = fd_slicer.createFromFd(fd, {autoClose: true});
+ fromRandomAccessReader(reader, stats.size, options, callback);
+ });
+}
+
+function fromBuffer(buffer, options, callback) {
+ if (typeof options === "function") {
+ callback = options;
+ options = null;
+ }
+ if (options == null) options = {};
+ options.autoClose = false;
+ if (options.lazyEntries == null) options.lazyEntries = false;
+ if (options.decodeStrings == null) options.decodeStrings = true;
+ if (options.validateEntrySizes == null) options.validateEntrySizes = true;
+ if (options.strictFileNames == null) options.strictFileNames = false;
+ // limit the max chunk size. see https://github.com/thejoshwolfe/yauzl/issues/87
+ var reader = fd_slicer.createFromBuffer(buffer, {maxChunkSize: 0x10000});
+ fromRandomAccessReader(reader, buffer.length, options, callback);
+}
+
+function fromRandomAccessReader(reader, totalSize, options, callback) {
+ if (typeof options === "function") {
+ callback = options;
+ options = null;
+ }
+ if (options == null) options = {};
+ if (options.autoClose == null) options.autoClose = true;
+ if (options.lazyEntries == null) options.lazyEntries = false;
+ if (options.decodeStrings == null) options.decodeStrings = true;
+ var decodeStrings = !!options.decodeStrings;
+ if (options.validateEntrySizes == null) options.validateEntrySizes = true;
+ if (options.strictFileNames == null) options.strictFileNames = false;
+ if (callback == null) callback = defaultCallback;
+ if (typeof totalSize !== "number") throw new Error("expected totalSize parameter to be a number");
+ if (totalSize > Number.MAX_SAFE_INTEGER) {
+ throw new Error("zip file too large. only file sizes up to 2^52 are supported due to JavaScript's Number type being an IEEE 754 double.");
+ }
+
+ // the matching unref() call is in zipfile.close()
+ reader.ref();
+
+ // eocdr means End of Central Directory Record.
+ // search backwards for the eocdr signature.
+ // the last field of the eocdr is a variable-length comment.
+ // the comment size is encoded in a 2-byte field in the eocdr, which we can't find without trudging backwards through the comment to find it.
+ // as a consequence of this design decision, it's possible to have ambiguous zip file metadata if a coherent eocdr was in the comment.
+ // we search backwards for a eocdr signature, and hope that whoever made the zip file was smart enough to forbid the eocdr signature in the comment.
+ var eocdrWithoutCommentSize = 22;
+ var maxCommentSize = 0xffff; // 2-byte size
+ var bufferSize = Math.min(eocdrWithoutCommentSize + maxCommentSize, totalSize);
+ var buffer = newBuffer(bufferSize);
+ var bufferReadStart = totalSize - buffer.length;
+ readAndAssertNoEof(reader, buffer, 0, bufferSize, bufferReadStart, function(err) {
+ if (err) return callback(err);
+ for (var i = bufferSize - eocdrWithoutCommentSize; i >= 0; i -= 1) {
+ if (buffer.readUInt32LE(i) !== 0x06054b50) continue;
+ // found eocdr
+ var eocdrBuffer = buffer.slice(i);
+
+ // 0 - End of central directory signature = 0x06054b50
+ // 4 - Number of this disk
+ var diskNumber = eocdrBuffer.readUInt16LE(4);
+ if (diskNumber !== 0) {
+ return callback(new Error("multi-disk zip files are not supported: found disk number: " + diskNumber));
+ }
+ // 6 - Disk where central directory starts
+ // 8 - Number of central directory records on this disk
+ // 10 - Total number of central directory records
+ var entryCount = eocdrBuffer.readUInt16LE(10);
+ // 12 - Size of central directory (bytes)
+ // 16 - Offset of start of central directory, relative to start of archive
+ var centralDirectoryOffset = eocdrBuffer.readUInt32LE(16);
+ // 20 - Comment length
+ var commentLength = eocdrBuffer.readUInt16LE(20);
+ var expectedCommentLength = eocdrBuffer.length - eocdrWithoutCommentSize;
+ if (commentLength !== expectedCommentLength) {
+ return callback(new Error("invalid comment length. expected: " + expectedCommentLength + ". found: " + commentLength));
+ }
+ // 22 - Comment
+ // the encoding is always cp437.
+ var comment = decodeStrings ? decodeBuffer(eocdrBuffer, 22, eocdrBuffer.length, false)
+ : eocdrBuffer.slice(22);
+
+ if (!(entryCount === 0xffff || centralDirectoryOffset === 0xffffffff)) {
+ return callback(null, new ZipFile(reader, centralDirectoryOffset, totalSize, entryCount, comment, options.autoClose, options.lazyEntries, decodeStrings, options.validateEntrySizes, options.strictFileNames));
+ }
+
+ // ZIP64 format
+
+ // ZIP64 Zip64 end of central directory locator
+ var zip64EocdlBuffer = newBuffer(20);
+ var zip64EocdlOffset = bufferReadStart + i - zip64EocdlBuffer.length;
+ readAndAssertNoEof(reader, zip64EocdlBuffer, 0, zip64EocdlBuffer.length, zip64EocdlOffset, function(err) {
+ if (err) return callback(err);
+
+ // 0 - zip64 end of central dir locator signature = 0x07064b50
+ if (zip64EocdlBuffer.readUInt32LE(0) !== 0x07064b50) {
+ return callback(new Error("invalid zip64 end of central directory locator signature"));
+ }
+ // 4 - number of the disk with the start of the zip64 end of central directory
+ // 8 - relative offset of the zip64 end of central directory record
+ var zip64EocdrOffset = readUInt64LE(zip64EocdlBuffer, 8);
+ // 16 - total number of disks
+
+ // ZIP64 end of central directory record
+ var zip64EocdrBuffer = newBuffer(56);
+ readAndAssertNoEof(reader, zip64EocdrBuffer, 0, zip64EocdrBuffer.length, zip64EocdrOffset, function(err) {
+ if (err) return callback(err);
+
+ // 0 - zip64 end of central dir signature 4 bytes (0x06064b50)
+ if (zip64EocdrBuffer.readUInt32LE(0) !== 0x06064b50) {
+ return callback(new Error("invalid zip64 end of central directory record signature"));
+ }
+ // 4 - size of zip64 end of central directory record 8 bytes
+ // 12 - version made by 2 bytes
+ // 14 - version needed to extract 2 bytes
+ // 16 - number of this disk 4 bytes
+ // 20 - number of the disk with the start of the central directory 4 bytes
+ // 24 - total number of entries in the central directory on this disk 8 bytes
+ // 32 - total number of entries in the central directory 8 bytes
+ entryCount = readUInt64LE(zip64EocdrBuffer, 32);
+ // 40 - size of the central directory 8 bytes
+ // 48 - offset of start of central directory with respect to the starting disk number 8 bytes
+ centralDirectoryOffset = readUInt64LE(zip64EocdrBuffer, 48);
+ // 56 - zip64 extensible data sector (variable size)
+ return callback(null, new ZipFile(reader, centralDirectoryOffset, totalSize, entryCount, comment, options.autoClose, options.lazyEntries, decodeStrings, options.validateEntrySizes, options.strictFileNames));
+ });
+ });
+ return;
+ }
+ callback(new Error("end of central directory record signature not found"));
+ });
+}
+
+util.inherits(ZipFile, EventEmitter);
+function ZipFile(reader, centralDirectoryOffset, fileSize, entryCount, comment, autoClose, lazyEntries, decodeStrings, validateEntrySizes, strictFileNames) {
+ var self = this;
+ EventEmitter.call(self);
+ self.reader = reader;
+ // forward close events
+ self.reader.on("error", function(err) {
+ // error closing the fd
+ emitError(self, err);
+ });
+ self.reader.once("close", function() {
+ self.emit("close");
+ });
+ self.readEntryCursor = centralDirectoryOffset;
+ self.fileSize = fileSize;
+ self.entryCount = entryCount;
+ self.comment = comment;
+ self.entriesRead = 0;
+ self.autoClose = !!autoClose;
+ self.lazyEntries = !!lazyEntries;
+ self.decodeStrings = !!decodeStrings;
+ self.validateEntrySizes = !!validateEntrySizes;
+ self.strictFileNames = !!strictFileNames;
+ self.isOpen = true;
+ self.emittedError = false;
+
+ if (!self.lazyEntries) self._readEntry();
+}
+ZipFile.prototype.close = function() {
+ if (!this.isOpen) return;
+ this.isOpen = false;
+ this.reader.unref();
+};
+
+function emitErrorAndAutoClose(self, err) {
+ if (self.autoClose) self.close();
+ emitError(self, err);
+}
+function emitError(self, err) {
+ if (self.emittedError) return;
+ self.emittedError = true;
+ self.emit("error", err);
+}
+
+ZipFile.prototype.readEntry = function() {
+ if (!this.lazyEntries) throw new Error("readEntry() called without lazyEntries:true");
+ this._readEntry();
+};
+ZipFile.prototype._readEntry = function() {
+ var self = this;
+ if (self.entryCount === self.entriesRead) {
+ // done with metadata
+ setImmediate(function() {
+ if (self.autoClose) self.close();
+ if (self.emittedError) return;
+ self.emit("end");
+ });
+ return;
+ }
+ if (self.emittedError) return;
+ var buffer = newBuffer(46);
+ readAndAssertNoEof(self.reader, buffer, 0, buffer.length, self.readEntryCursor, function(err) {
+ if (err) return emitErrorAndAutoClose(self, err);
+ if (self.emittedError) return;
+ var entry = new Entry();
+ // 0 - Central directory file header signature
+ var signature = buffer.readUInt32LE(0);
+ if (signature !== 0x02014b50) return emitErrorAndAutoClose(self, new Error("invalid central directory file header signature: 0x" + signature.toString(16)));
+ // 4 - Version made by
+ entry.versionMadeBy = buffer.readUInt16LE(4);
+ // 6 - Version needed to extract (minimum)
+ entry.versionNeededToExtract = buffer.readUInt16LE(6);
+ // 8 - General purpose bit flag
+ entry.generalPurposeBitFlag = buffer.readUInt16LE(8);
+ // 10 - Compression method
+ entry.compressionMethod = buffer.readUInt16LE(10);
+ // 12 - File last modification time
+ entry.lastModFileTime = buffer.readUInt16LE(12);
+ // 14 - File last modification date
+ entry.lastModFileDate = buffer.readUInt16LE(14);
+ // 16 - CRC-32
+ entry.crc32 = buffer.readUInt32LE(16);
+ // 20 - Compressed size
+ entry.compressedSize = buffer.readUInt32LE(20);
+ // 24 - Uncompressed size
+ entry.uncompressedSize = buffer.readUInt32LE(24);
+ // 28 - File name length (n)
+ entry.fileNameLength = buffer.readUInt16LE(28);
+ // 30 - Extra field length (m)
+ entry.extraFieldLength = buffer.readUInt16LE(30);
+ // 32 - File comment length (k)
+ entry.fileCommentLength = buffer.readUInt16LE(32);
+ // 34 - Disk number where file starts
+ // 36 - Internal file attributes
+ entry.internalFileAttributes = buffer.readUInt16LE(36);
+ // 38 - External file attributes
+ entry.externalFileAttributes = buffer.readUInt32LE(38);
+ // 42 - Relative offset of local file header
+ entry.relativeOffsetOfLocalHeader = buffer.readUInt32LE(42);
+
+ if (entry.generalPurposeBitFlag & 0x40) return emitErrorAndAutoClose(self, new Error("strong encryption is not supported"));
+
+ self.readEntryCursor += 46;
+
+ buffer = newBuffer(entry.fileNameLength + entry.extraFieldLength + entry.fileCommentLength);
+ readAndAssertNoEof(self.reader, buffer, 0, buffer.length, self.readEntryCursor, function(err) {
+ if (err) return emitErrorAndAutoClose(self, err);
+ if (self.emittedError) return;
+ // 46 - File name
+ var isUtf8 = (entry.generalPurposeBitFlag & 0x800) !== 0;
+ entry.fileName = self.decodeStrings ? decodeBuffer(buffer, 0, entry.fileNameLength, isUtf8)
+ : buffer.slice(0, entry.fileNameLength);
+
+ // 46+n - Extra field
+ var fileCommentStart = entry.fileNameLength + entry.extraFieldLength;
+ var extraFieldBuffer = buffer.slice(entry.fileNameLength, fileCommentStart);
+ entry.extraFields = [];
+ var i = 0;
+ while (i < extraFieldBuffer.length - 3) {
+ var headerId = extraFieldBuffer.readUInt16LE(i + 0);
+ var dataSize = extraFieldBuffer.readUInt16LE(i + 2);
+ var dataStart = i + 4;
+ var dataEnd = dataStart + dataSize;
+ if (dataEnd > extraFieldBuffer.length) return emitErrorAndAutoClose(self, new Error("extra field length exceeds extra field buffer size"));
+ var dataBuffer = newBuffer(dataSize);
+ extraFieldBuffer.copy(dataBuffer, 0, dataStart, dataEnd);
+ entry.extraFields.push({
+ id: headerId,
+ data: dataBuffer,
+ });
+ i = dataEnd;
+ }
+
+ // 46+n+m - File comment
+ entry.fileComment = self.decodeStrings ? decodeBuffer(buffer, fileCommentStart, fileCommentStart + entry.fileCommentLength, isUtf8)
+ : buffer.slice(fileCommentStart, fileCommentStart + entry.fileCommentLength);
+ // compatibility hack for https://github.com/thejoshwolfe/yauzl/issues/47
+ entry.comment = entry.fileComment;
+
+ self.readEntryCursor += buffer.length;
+ self.entriesRead += 1;
+
+ if (entry.uncompressedSize === 0xffffffff ||
+ entry.compressedSize === 0xffffffff ||
+ entry.relativeOffsetOfLocalHeader === 0xffffffff) {
+ // ZIP64 format
+ // find the Zip64 Extended Information Extra Field
+ var zip64EiefBuffer = null;
+ for (var i = 0; i < entry.extraFields.length; i++) {
+ var extraField = entry.extraFields[i];
+ if (extraField.id === 0x0001) {
+ zip64EiefBuffer = extraField.data;
+ break;
+ }
+ }
+ if (zip64EiefBuffer == null) {
+ return emitErrorAndAutoClose(self, new Error("expected zip64 extended information extra field"));
+ }
+ var index = 0;
+ // 0 - Original Size 8 bytes
+ if (entry.uncompressedSize === 0xffffffff) {
+ if (index + 8 > zip64EiefBuffer.length) {
+ return emitErrorAndAutoClose(self, new Error("zip64 extended information extra field does not include uncompressed size"));
+ }
+ entry.uncompressedSize = readUInt64LE(zip64EiefBuffer, index);
+ index += 8;
+ }
+ // 8 - Compressed Size 8 bytes
+ if (entry.compressedSize === 0xffffffff) {
+ if (index + 8 > zip64EiefBuffer.length) {
+ return emitErrorAndAutoClose(self, new Error("zip64 extended information extra field does not include compressed size"));
+ }
+ entry.compressedSize = readUInt64LE(zip64EiefBuffer, index);
+ index += 8;
+ }
+ // 16 - Relative Header Offset 8 bytes
+ if (entry.relativeOffsetOfLocalHeader === 0xffffffff) {
+ if (index + 8 > zip64EiefBuffer.length) {
+ return emitErrorAndAutoClose(self, new Error("zip64 extended information extra field does not include relative header offset"));
+ }
+ entry.relativeOffsetOfLocalHeader = readUInt64LE(zip64EiefBuffer, index);
+ index += 8;
+ }
+ // 24 - Disk Start Number 4 bytes
+ }
+
+ // check for Info-ZIP Unicode Path Extra Field (0x7075)
+ // see https://github.com/thejoshwolfe/yauzl/issues/33
+ if (self.decodeStrings) {
+ for (var i = 0; i < entry.extraFields.length; i++) {
+ var extraField = entry.extraFields[i];
+ if (extraField.id === 0x7075) {
+ if (extraField.data.length < 6) {
+ // too short to be meaningful
+ continue;
+ }
+ // Version 1 byte version of this extra field, currently 1
+ if (extraField.data.readUInt8(0) !== 1) {
+ // > Changes may not be backward compatible so this extra
+ // > field should not be used if the version is not recognized.
+ continue;
+ }
+ // NameCRC32 4 bytes File Name Field CRC32 Checksum
+ var oldNameCrc32 = extraField.data.readUInt32LE(1);
+ if (crc32.unsigned(buffer.slice(0, entry.fileNameLength)) !== oldNameCrc32) {
+ // > If the CRC check fails, this UTF-8 Path Extra Field should be
+ // > ignored and the File Name field in the header should be used instead.
+ continue;
+ }
+ // UnicodeName Variable UTF-8 version of the entry File Name
+ entry.fileName = decodeBuffer(extraField.data, 5, extraField.data.length, true);
+ break;
+ }
+ }
+ }
+
+ // validate file size
+ if (self.validateEntrySizes && entry.compressionMethod === 0) {
+ var expectedCompressedSize = entry.uncompressedSize;
+ if (entry.isEncrypted()) {
+ // traditional encryption prefixes the file data with a header
+ expectedCompressedSize += 12;
+ }
+ if (entry.compressedSize !== expectedCompressedSize) {
+ var msg = "compressed/uncompressed size mismatch for stored file: " + entry.compressedSize + " != " + entry.uncompressedSize;
+ return emitErrorAndAutoClose(self, new Error(msg));
+ }
+ }
+
+ if (self.decodeStrings) {
+ if (!self.strictFileNames) {
+ // allow backslash
+ entry.fileName = entry.fileName.replace(/\\/g, "/");
+ }
+ var errorMessage = validateFileName(entry.fileName, self.validateFileNameOptions);
+ if (errorMessage != null) return emitErrorAndAutoClose(self, new Error(errorMessage));
+ }
+ self.emit("entry", entry);
+
+ if (!self.lazyEntries) self._readEntry();
+ });
+ });
+};
+
+ZipFile.prototype.openReadStream = function(entry, options, callback) {
+ var self = this;
+ // parameter validation
+ var relativeStart = 0;
+ var relativeEnd = entry.compressedSize;
+ if (callback == null) {
+ callback = options;
+ options = {};
+ } else {
+ // validate options that the caller has no excuse to get wrong
+ if (options.decrypt != null) {
+ if (!entry.isEncrypted()) {
+ throw new Error("options.decrypt can only be specified for encrypted entries");
+ }
+ if (options.decrypt !== false) throw new Error("invalid options.decrypt value: " + options.decrypt);
+ if (entry.isCompressed()) {
+ if (options.decompress !== false) throw new Error("entry is encrypted and compressed, and options.decompress !== false");
+ }
+ }
+ if (options.decompress != null) {
+ if (!entry.isCompressed()) {
+ throw new Error("options.decompress can only be specified for compressed entries");
+ }
+ if (!(options.decompress === false || options.decompress === true)) {
+ throw new Error("invalid options.decompress value: " + options.decompress);
+ }
+ }
+ if (options.start != null || options.end != null) {
+ if (entry.isCompressed() && options.decompress !== false) {
+ throw new Error("start/end range not allowed for compressed entry without options.decompress === false");
+ }
+ if (entry.isEncrypted() && options.decrypt !== false) {
+ throw new Error("start/end range not allowed for encrypted entry without options.decrypt === false");
+ }
+ }
+ if (options.start != null) {
+ relativeStart = options.start;
+ if (relativeStart < 0) throw new Error("options.start < 0");
+ if (relativeStart > entry.compressedSize) throw new Error("options.start > entry.compressedSize");
+ }
+ if (options.end != null) {
+ relativeEnd = options.end;
+ if (relativeEnd < 0) throw new Error("options.end < 0");
+ if (relativeEnd > entry.compressedSize) throw new Error("options.end > entry.compressedSize");
+ if (relativeEnd < relativeStart) throw new Error("options.end < options.start");
+ }
+ }
+ // any further errors can either be caused by the zipfile,
+ // or were introduced in a minor version of yauzl,
+ // so should be passed to the client rather than thrown.
+ if (!self.isOpen) return callback(new Error("closed"));
+ if (entry.isEncrypted()) {
+ if (options.decrypt !== false) return callback(new Error("entry is encrypted, and options.decrypt !== false"));
+ }
+ // make sure we don't lose the fd before we open the actual read stream
+ self.reader.ref();
+ var buffer = newBuffer(30);
+ readAndAssertNoEof(self.reader, buffer, 0, buffer.length, entry.relativeOffsetOfLocalHeader, function(err) {
+ try {
+ if (err) return callback(err);
+ // 0 - Local file header signature = 0x04034b50
+ var signature = buffer.readUInt32LE(0);
+ if (signature !== 0x04034b50) {
+ return callback(new Error("invalid local file header signature: 0x" + signature.toString(16)));
+ }
+ // all this should be redundant
+ // 4 - Version needed to extract (minimum)
+ // 6 - General purpose bit flag
+ // 8 - Compression method
+ // 10 - File last modification time
+ // 12 - File last modification date
+ // 14 - CRC-32
+ // 18 - Compressed size
+ // 22 - Uncompressed size
+ // 26 - File name length (n)
+ var fileNameLength = buffer.readUInt16LE(26);
+ // 28 - Extra field length (m)
+ var extraFieldLength = buffer.readUInt16LE(28);
+ // 30 - File name
+ // 30+n - Extra field
+ var localFileHeaderEnd = entry.relativeOffsetOfLocalHeader + buffer.length + fileNameLength + extraFieldLength;
+ var decompress;
+ if (entry.compressionMethod === 0) {
+ // 0 - The file is stored (no compression)
+ decompress = false;
+ } else if (entry.compressionMethod === 8) {
+ // 8 - The file is Deflated
+ decompress = options.decompress != null ? options.decompress : true;
+ } else {
+ return callback(new Error("unsupported compression method: " + entry.compressionMethod));
+ }
+ var fileDataStart = localFileHeaderEnd;
+ var fileDataEnd = fileDataStart + entry.compressedSize;
+ if (entry.compressedSize !== 0) {
+ // bounds check now, because the read streams will probably not complain loud enough.
+ // since we're dealing with an unsigned offset plus an unsigned size,
+ // we only have 1 thing to check for.
+ if (fileDataEnd > self.fileSize) {
+ return callback(new Error("file data overflows file bounds: " +
+ fileDataStart + " + " + entry.compressedSize + " > " + self.fileSize));
+ }
+ }
+ var readStream = self.reader.createReadStream({
+ start: fileDataStart + relativeStart,
+ end: fileDataStart + relativeEnd,
+ });
+ var endpointStream = readStream;
+ if (decompress) {
+ var destroyed = false;
+ var inflateFilter = zlib.createInflateRaw();
+ readStream.on("error", function(err) {
+ // setImmediate here because errors can be emitted during the first call to pipe()
+ setImmediate(function() {
+ if (!destroyed) inflateFilter.emit("error", err);
+ });
+ });
+ readStream.pipe(inflateFilter);
+
+ if (self.validateEntrySizes) {
+ endpointStream = new AssertByteCountStream(entry.uncompressedSize);
+ inflateFilter.on("error", function(err) {
+ // forward zlib errors to the client-visible stream
+ setImmediate(function() {
+ if (!destroyed) endpointStream.emit("error", err);
+ });
+ });
+ inflateFilter.pipe(endpointStream);
+ } else {
+ // the zlib filter is the client-visible stream
+ endpointStream = inflateFilter;
+ }
+ // this is part of yauzl's API, so implement this function on the client-visible stream
+ endpointStream.destroy = function() {
+ destroyed = true;
+ if (inflateFilter !== endpointStream) inflateFilter.unpipe(endpointStream);
+ readStream.unpipe(inflateFilter);
+ // TODO: the inflateFilter may cause a memory leak. see Issue #27.
+ readStream.destroy();
+ };
+ }
+ callback(null, endpointStream);
+ } finally {
+ self.reader.unref();
+ }
+ });
+};
+
+function Entry() {
+}
+Entry.prototype.getLastModDate = function() {
+ return dosDateTimeToDate(this.lastModFileDate, this.lastModFileTime);
+};
+Entry.prototype.isEncrypted = function() {
+ return (this.generalPurposeBitFlag & 0x1) !== 0;
+};
+Entry.prototype.isCompressed = function() {
+ return this.compressionMethod === 8;
+};
+
+function dosDateTimeToDate(date, time) {
+ var day = date & 0x1f; // 1-31
+ var month = (date >> 5 & 0xf) - 1; // 1-12, 0-11
+ var year = (date >> 9 & 0x7f) + 1980; // 0-128, 1980-2108
+
+ var millisecond = 0;
+ var second = (time & 0x1f) * 2; // 0-29, 0-58 (even numbers)
+ var minute = time >> 5 & 0x3f; // 0-59
+ var hour = time >> 11 & 0x1f; // 0-23
+
+ return new Date(year, month, day, hour, minute, second, millisecond);
+}
+
+function validateFileName(fileName) {
+ if (fileName.indexOf("\\") !== -1) {
+ return "invalid characters in fileName: " + fileName;
+ }
+ if (/^[a-zA-Z]:/.test(fileName) || /^\//.test(fileName)) {
+ return "absolute path: " + fileName;
+ }
+ if (fileName.split("/").indexOf("..") !== -1) {
+ return "invalid relative path: " + fileName;
+ }
+ // all good
+ return null;
+}
+
+function readAndAssertNoEof(reader, buffer, offset, length, position, callback) {
+ if (length === 0) {
+ // fs.read will throw an out-of-bounds error if you try to read 0 bytes from a 0 byte file
+ return setImmediate(function() { callback(null, newBuffer(0)); });
+ }
+ reader.read(buffer, offset, length, position, function(err, bytesRead) {
+ if (err) return callback(err);
+ if (bytesRead < length) {
+ return callback(new Error("unexpected EOF"));
+ }
+ callback();
+ });
+}
+
+util.inherits(AssertByteCountStream, Transform);
+function AssertByteCountStream(byteCount) {
+ Transform.call(this);
+ this.actualByteCount = 0;
+ this.expectedByteCount = byteCount;
+}
+AssertByteCountStream.prototype._transform = function(chunk, encoding, cb) {
+ this.actualByteCount += chunk.length;
+ if (this.actualByteCount > this.expectedByteCount) {
+ var msg = "too many bytes in the stream. expected " + this.expectedByteCount + ". got at least " + this.actualByteCount;
+ return cb(new Error(msg));
+ }
+ cb(null, chunk);
+};
+AssertByteCountStream.prototype._flush = function(cb) {
+ if (this.actualByteCount < this.expectedByteCount) {
+ var msg = "not enough bytes in the stream. expected " + this.expectedByteCount + ". got only " + this.actualByteCount;
+ return cb(new Error(msg));
+ }
+ cb();
+};
+
+util.inherits(RandomAccessReader, EventEmitter);
+function RandomAccessReader() {
+ EventEmitter.call(this);
+ this.refCount = 0;
+}
+RandomAccessReader.prototype.ref = function() {
+ this.refCount += 1;
+};
+RandomAccessReader.prototype.unref = function() {
+ var self = this;
+ self.refCount -= 1;
+
+ if (self.refCount > 0) return;
+ if (self.refCount < 0) throw new Error("invalid unref");
+
+ self.close(onCloseDone);
+
+ function onCloseDone(err) {
+ if (err) return self.emit('error', err);
+ self.emit('close');
+ }
+};
+RandomAccessReader.prototype.createReadStream = function(options) {
+ var start = options.start;
+ var end = options.end;
+ if (start === end) {
+ var emptyStream = new PassThrough();
+ setImmediate(function() {
+ emptyStream.end();
+ });
+ return emptyStream;
+ }
+ var stream = this._readStreamForRange(start, end);
+
+ var destroyed = false;
+ var refUnrefFilter = new RefUnrefFilter(this);
+ stream.on("error", function(err) {
+ setImmediate(function() {
+ if (!destroyed) refUnrefFilter.emit("error", err);
+ });
+ });
+ refUnrefFilter.destroy = function() {
+ stream.unpipe(refUnrefFilter);
+ refUnrefFilter.unref();
+ stream.destroy();
+ };
+
+ var byteCounter = new AssertByteCountStream(end - start);
+ refUnrefFilter.on("error", function(err) {
+ setImmediate(function() {
+ if (!destroyed) byteCounter.emit("error", err);
+ });
+ });
+ byteCounter.destroy = function() {
+ destroyed = true;
+ refUnrefFilter.unpipe(byteCounter);
+ refUnrefFilter.destroy();
+ };
+
+ return stream.pipe(refUnrefFilter).pipe(byteCounter);
+};
+RandomAccessReader.prototype._readStreamForRange = function(start, end) {
+ throw new Error("not implemented");
+};
+RandomAccessReader.prototype.read = function(buffer, offset, length, position, callback) {
+ var readStream = this.createReadStream({start: position, end: position + length});
+ var writeStream = new Writable();
+ var written = 0;
+ writeStream._write = function(chunk, encoding, cb) {
+ chunk.copy(buffer, offset + written, 0, chunk.length);
+ written += chunk.length;
+ cb();
+ };
+ writeStream.on("finish", callback);
+ readStream.on("error", function(error) {
+ callback(error);
+ });
+ readStream.pipe(writeStream);
+};
+RandomAccessReader.prototype.close = function(callback) {
+ setImmediate(callback);
+};
+
+util.inherits(RefUnrefFilter, PassThrough);
+function RefUnrefFilter(context) {
+ PassThrough.call(this);
+ this.context = context;
+ this.context.ref();
+ this.unreffedYet = false;
+}
+RefUnrefFilter.prototype._flush = function(cb) {
+ this.unref();
+ cb();
+};
+RefUnrefFilter.prototype.unref = function(cb) {
+ if (this.unreffedYet) return;
+ this.unreffedYet = true;
+ this.context.unref();
+};
+
+var cp437 = '\u0000☺☻♥♦♣♠•◘○◙♂♀♪♫☼►◄↕‼¶§▬↨↑↓→←∟↔▲▼ !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~⌂ÇüéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜ¢£¥₧ƒáíóúñѪº¿⌐¬½¼¡«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀αßΓπΣσµτΦΘΩδ∞φε∩≡±≥≤⌠⌡÷≈°∙·√ⁿ²■ ';
+function decodeBuffer(buffer, start, end, isUtf8) {
+ if (isUtf8) {
+ return buffer.toString("utf8", start, end);
+ } else {
+ var result = "";
+ for (var i = start; i < end; i++) {
+ result += cp437[buffer[i]];
+ }
+ return result;
+ }
+}
+
+function readUInt64LE(buffer, offset) {
+ // there is no native function for this, because we can't actually store 64-bit integers precisely.
+ // after 53 bits, JavaScript's Number type (IEEE 754 double) can't store individual integers anymore.
+ // but since 53 bits is a whole lot more than 32 bits, we do our best anyway.
+ var lower32 = buffer.readUInt32LE(offset);
+ var upper32 = buffer.readUInt32LE(offset + 4);
+ // we can't use bitshifting here, because JavaScript bitshifting only works on 32-bit integers.
+ return upper32 * 0x100000000 + lower32;
+ // as long as we're bounds checking the result of this function against the total file size,
+ // we'll catch any overflow errors, because we already made sure the total file size was within reason.
+}
+
+// Node 10 deprecated new Buffer().
+var newBuffer;
+if (typeof Buffer.allocUnsafe === "function") {
+ newBuffer = function(len) {
+ return Buffer.allocUnsafe(len);
+ };
+} else {
+ newBuffer = function(len) {
+ return new Buffer(len);
+ };
+}
+
+function defaultCallback(err) {
+ if (err) throw err;
+}
diff --git a/node_modules/yauzl/package.json b/node_modules/yauzl/package.json
new file mode 100644
index 0000000..9a45cb7
--- /dev/null
+++ b/node_modules/yauzl/package.json
@@ -0,0 +1,68 @@
+{
+ "_from": "yauzl@^2.4.2",
+ "_id": "yauzl@2.10.0",
+ "_inBundle": false,
+ "_integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+ "_location": "/yauzl",
+ "_phantomChildren": {},
+ "_requested": {
+ "type": "range",
+ "registry": true,
+ "raw": "yauzl@^2.4.2",
+ "name": "yauzl",
+ "escapedName": "yauzl",
+ "rawSpec": "^2.4.2",
+ "saveSpec": null,
+ "fetchSpec": "^2.4.2"
+ },
+ "_requiredBy": [
+ "/decompress-unzip"
+ ],
+ "_resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+ "_shasum": "c7eb17c93e112cb1086fa6d8e51fb0667b79a5f9",
+ "_spec": "yauzl@^2.4.2",
+ "_where": "C:\\Users\\marcr\\Desktop\\KorAp\\Git\\Kalamar\\node_modules\\decompress-unzip",
+ "author": {
+ "name": "Josh Wolfe",
+ "email": "thejoshwolfe@gmail.com"
+ },
+ "bugs": {
+ "url": "https://github.com/thejoshwolfe/yauzl/issues"
+ },
+ "bundleDependencies": false,
+ "dependencies": {
+ "buffer-crc32": "~0.2.3",
+ "fd-slicer": "~1.1.0"
+ },
+ "deprecated": false,
+ "description": "yet another unzip library for node",
+ "devDependencies": {
+ "bl": "~1.0.0",
+ "istanbul": "~0.3.4",
+ "pend": "~1.2.0"
+ },
+ "files": [
+ "index.js"
+ ],
+ "homepage": "https://github.com/thejoshwolfe/yauzl",
+ "keywords": [
+ "unzip",
+ "zip",
+ "stream",
+ "archive",
+ "file"
+ ],
+ "license": "MIT",
+ "main": "index.js",
+ "name": "yauzl",
+ "repository": {
+ "type": "git",
+ "url": "git+https://github.com/thejoshwolfe/yauzl.git"
+ },
+ "scripts": {
+ "test": "node test/test.js",
+ "test-cov": "istanbul cover test/test.js",
+ "test-travis": "istanbul cover --report lcovonly test/test.js"
+ },
+ "version": "2.10.0"
+}