mirror of
https://github.com/denoland/deno.git
synced 2024-12-25 00:29:09 -05:00
466 lines
12 KiB
TypeScript
466 lines
12 KiB
TypeScript
/**
|
|
* Ported and modified from: https://github.com/jshttp/mime-types and
|
|
* licensed as:
|
|
*
|
|
* (The MIT License)
|
|
*
|
|
* Copyright (c) 2011 T. Jameson Little
|
|
* Copyright (c) 2019 Jun Kato
|
|
* Copyright (c) 2020 the Deno authors
|
|
*
|
|
* 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.
|
|
*/
|
|
import { MultiReader } from "../io/readers.ts";
|
|
import { BufReader } from "../io/bufio.ts";
|
|
|
|
const recordSize = 512;
|
|
const ustar = "ustar\u000000";
|
|
|
|
/**
|
|
* Simple file reader
|
|
*/
|
|
class FileReader implements Deno.Reader {
|
|
private file?: Deno.File;
|
|
|
|
constructor(private filePath: string, private mode: Deno.OpenMode = "r") {}
|
|
|
|
public async read(p: Uint8Array): Promise<number | Deno.EOF> {
|
|
if (!this.file) {
|
|
this.file = await Deno.open(this.filePath, this.mode);
|
|
}
|
|
const res = await Deno.read(this.file.rid, p);
|
|
if (res === Deno.EOF) {
|
|
await Deno.close(this.file.rid);
|
|
this.file = undefined;
|
|
}
|
|
return res;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the trailing null codes
|
|
* @param buffer
|
|
*/
|
|
function trim(buffer: Uint8Array): Uint8Array {
|
|
const index = buffer.findIndex((v): boolean => v === 0);
|
|
if (index < 0) return buffer;
|
|
return buffer.subarray(0, index);
|
|
}
|
|
|
|
/**
|
|
* Initialize Uint8Array of the specified length filled with 0
|
|
* @param length
|
|
*/
|
|
function clean(length: number): Uint8Array {
|
|
const buffer = new Uint8Array(length);
|
|
buffer.fill(0, 0, length - 1);
|
|
return buffer;
|
|
}
|
|
|
|
function pad(num: number, bytes: number, base?: number): string {
|
|
const numString = num.toString(base || 8);
|
|
return "000000000000".substr(numString.length + 12 - bytes) + numString;
|
|
}
|
|
|
|
/*
|
|
struct posix_header { // byte offset
|
|
char name[100]; // 0
|
|
char mode[8]; // 100
|
|
char uid[8]; // 108
|
|
char gid[8]; // 116
|
|
char size[12]; // 124
|
|
char mtime[12]; // 136
|
|
char chksum[8]; // 148
|
|
char typeflag; // 156
|
|
char linkname[100]; // 157
|
|
char magic[6]; // 257
|
|
char version[2]; // 263
|
|
char uname[32]; // 265
|
|
char gname[32]; // 297
|
|
char devmajor[8]; // 329
|
|
char devminor[8]; // 337
|
|
char prefix[155]; // 345
|
|
// 500
|
|
};
|
|
*/
|
|
|
|
const ustarStructure: Array<{ field: string; length: number }> = [
|
|
{
|
|
field: "fileName",
|
|
length: 100
|
|
},
|
|
{
|
|
field: "fileMode",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "uid",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "gid",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "fileSize",
|
|
length: 12
|
|
},
|
|
{
|
|
field: "mtime",
|
|
length: 12
|
|
},
|
|
{
|
|
field: "checksum",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "type",
|
|
length: 1
|
|
},
|
|
{
|
|
field: "linkName",
|
|
length: 100
|
|
},
|
|
{
|
|
field: "ustar",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "owner",
|
|
length: 32
|
|
},
|
|
{
|
|
field: "group",
|
|
length: 32
|
|
},
|
|
{
|
|
field: "majorNumber",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "minorNumber",
|
|
length: 8
|
|
},
|
|
{
|
|
field: "fileNamePrefix",
|
|
length: 155
|
|
},
|
|
{
|
|
field: "padding",
|
|
length: 12
|
|
}
|
|
];
|
|
|
|
/**
|
|
* Create header for a file in a tar archive
|
|
*/
|
|
function formatHeader(data: TarData): Uint8Array {
|
|
const encoder = new TextEncoder(),
|
|
buffer = clean(512);
|
|
let offset = 0;
|
|
ustarStructure.forEach(function(value): void {
|
|
const entry = encoder.encode(data[value.field as keyof TarData] || "");
|
|
buffer.set(entry, offset);
|
|
offset += value.length; // space it out with nulls
|
|
});
|
|
return buffer;
|
|
}
|
|
|
|
/**
|
|
* Parse file header in a tar archive
|
|
* @param length
|
|
*/
|
|
function parseHeader(buffer: Uint8Array): { [key: string]: Uint8Array } {
|
|
const data: { [key: string]: Uint8Array } = {};
|
|
let offset = 0;
|
|
ustarStructure.forEach(function(value): void {
|
|
const arr = buffer.subarray(offset, offset + value.length);
|
|
data[value.field] = arr;
|
|
offset += value.length;
|
|
});
|
|
return data;
|
|
}
|
|
|
|
export interface TarData {
|
|
fileName?: string;
|
|
fileNamePrefix?: string;
|
|
fileMode?: string;
|
|
uid?: string;
|
|
gid?: string;
|
|
fileSize?: string;
|
|
mtime?: string;
|
|
checksum?: string;
|
|
type?: string;
|
|
ustar?: string;
|
|
owner?: string;
|
|
group?: string;
|
|
}
|
|
|
|
export interface TarDataWithSource extends TarData {
|
|
/**
|
|
* file to read
|
|
*/
|
|
filePath?: string;
|
|
/**
|
|
* buffer to read
|
|
*/
|
|
reader?: Deno.Reader;
|
|
}
|
|
|
|
export interface TarInfo {
|
|
fileMode?: number;
|
|
mtime?: number;
|
|
uid?: number;
|
|
gid?: number;
|
|
owner?: string;
|
|
group?: string;
|
|
}
|
|
|
|
export interface TarOptions extends TarInfo {
|
|
/**
|
|
* append file
|
|
*/
|
|
filePath?: string;
|
|
|
|
/**
|
|
* append any arbitrary content
|
|
*/
|
|
reader?: Deno.Reader;
|
|
|
|
/**
|
|
* size of the content to be appended
|
|
*/
|
|
contentSize?: number;
|
|
}
|
|
|
|
export interface UntarOptions extends TarInfo {
|
|
fileName: string;
|
|
}
|
|
|
|
/**
|
|
* A class to create a tar archive
|
|
*/
|
|
export class Tar {
|
|
data: TarDataWithSource[];
|
|
written: number;
|
|
out: Uint8Array;
|
|
private blockSize: number;
|
|
|
|
constructor(recordsPerBlock?: number) {
|
|
this.data = [];
|
|
this.written = 0;
|
|
this.blockSize = (recordsPerBlock || 20) * recordSize;
|
|
this.out = clean(this.blockSize);
|
|
}
|
|
|
|
/**
|
|
* Append a file to this tar archive
|
|
* @param fileName file name
|
|
* e.g., test.txt; use slash for directory separators
|
|
* @param opts options
|
|
*/
|
|
async append(fileName: string, opts: TarOptions): Promise<void> {
|
|
if (typeof fileName !== "string")
|
|
throw new Error("file name not specified");
|
|
|
|
// separate file name into two parts if needed
|
|
let fileNamePrefix: string;
|
|
if (fileName.length > 100) {
|
|
let i = fileName.length;
|
|
while (i >= 0) {
|
|
i = fileName.lastIndexOf("/", i);
|
|
if (i <= 155) {
|
|
fileNamePrefix = fileName.substr(0, i);
|
|
fileName = fileName.substr(i + 1);
|
|
break;
|
|
}
|
|
i--;
|
|
}
|
|
if (i < 0 || fileName.length > 100 || fileNamePrefix!.length > 155) {
|
|
throw new Error(
|
|
"ustar format does not allow a long file name (length of [file name" +
|
|
"prefix] + / + [file name] must be shorter than 256 bytes)"
|
|
);
|
|
}
|
|
}
|
|
fileNamePrefix = fileNamePrefix!;
|
|
|
|
opts = opts || {};
|
|
|
|
// set meta data
|
|
const info = opts.filePath && (await Deno.stat(opts.filePath));
|
|
|
|
const mode =
|
|
opts.fileMode || (info && info.mode) || parseInt("777", 8) & 0xfff,
|
|
mtime =
|
|
opts.mtime ||
|
|
(info && info.modified) ||
|
|
Math.floor(new Date().getTime() / 1000),
|
|
uid = opts.uid || 0,
|
|
gid = opts.gid || 0;
|
|
if (typeof opts.owner === "string" && opts.owner.length >= 32) {
|
|
throw new Error(
|
|
"ustar format does not allow owner name length >= 32 bytes"
|
|
);
|
|
}
|
|
if (typeof opts.group === "string" && opts.group.length >= 32) {
|
|
throw new Error(
|
|
"ustar format does not allow group name length >= 32 bytes"
|
|
);
|
|
}
|
|
|
|
const tarData: TarDataWithSource = {
|
|
fileName,
|
|
fileNamePrefix,
|
|
fileMode: pad(mode, 7),
|
|
uid: pad(uid, 7),
|
|
gid: pad(gid, 7),
|
|
fileSize: pad((info ? info.len : opts.contentSize)!, 11),
|
|
mtime: pad(mtime, 11),
|
|
checksum: " ",
|
|
type: "0", // just a file
|
|
ustar,
|
|
owner: opts.owner || "",
|
|
group: opts.group || "",
|
|
filePath: opts.filePath,
|
|
reader: opts.reader
|
|
};
|
|
|
|
// calculate the checksum
|
|
let checksum = 0;
|
|
const encoder = new TextEncoder();
|
|
Object.keys(tarData)
|
|
.filter((key): boolean => ["filePath", "reader"].indexOf(key) < 0)
|
|
.forEach(function(key): void {
|
|
checksum += encoder
|
|
.encode(tarData[key as keyof TarData])
|
|
.reduce((p, c): number => p + c, 0);
|
|
});
|
|
|
|
tarData.checksum = pad(checksum, 6) + "\u0000 ";
|
|
this.data.push(tarData);
|
|
}
|
|
|
|
/**
|
|
* Get a Reader instance for this tar data
|
|
*/
|
|
getReader(): Deno.Reader {
|
|
const readers: Deno.Reader[] = [];
|
|
this.data.forEach((tarData): void => {
|
|
let { reader } = tarData;
|
|
const { filePath } = tarData;
|
|
const headerArr = formatHeader(tarData);
|
|
readers.push(new Deno.Buffer(headerArr));
|
|
if (!reader) {
|
|
reader = new FileReader(filePath!);
|
|
}
|
|
readers.push(reader);
|
|
|
|
// to the nearest multiple of recordSize
|
|
readers.push(
|
|
new Deno.Buffer(
|
|
clean(
|
|
recordSize -
|
|
(parseInt(tarData.fileSize!, 8) % recordSize || recordSize)
|
|
)
|
|
)
|
|
);
|
|
});
|
|
|
|
// append 2 empty records
|
|
readers.push(new Deno.Buffer(clean(recordSize * 2)));
|
|
return new MultiReader(...readers);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A class to create a tar archive
|
|
*/
|
|
export class Untar {
|
|
reader: BufReader;
|
|
block: Uint8Array;
|
|
|
|
constructor(reader: Deno.Reader) {
|
|
this.reader = new BufReader(reader);
|
|
this.block = new Uint8Array(recordSize);
|
|
}
|
|
|
|
async extract(writer: Deno.Writer): Promise<UntarOptions> {
|
|
await this.reader.readFull(this.block);
|
|
const header = parseHeader(this.block);
|
|
|
|
// calculate the checksum
|
|
let checksum = 0;
|
|
const encoder = new TextEncoder(),
|
|
decoder = new TextDecoder("ascii");
|
|
Object.keys(header)
|
|
.filter((key): boolean => key !== "checksum")
|
|
.forEach(function(key): void {
|
|
checksum += header[key].reduce((p, c): number => p + c, 0);
|
|
});
|
|
checksum += encoder.encode(" ").reduce((p, c): number => p + c, 0);
|
|
|
|
if (parseInt(decoder.decode(header.checksum), 8) !== checksum) {
|
|
throw new Error("checksum error");
|
|
}
|
|
|
|
const magic = decoder.decode(header.ustar);
|
|
if (magic !== ustar) {
|
|
throw new Error(`unsupported archive format: ${magic}`);
|
|
}
|
|
|
|
// get meta data
|
|
const meta: UntarOptions = {
|
|
fileName: decoder.decode(trim(header.fileName))
|
|
};
|
|
const fileNamePrefix = trim(header.fileNamePrefix);
|
|
if (fileNamePrefix.byteLength > 0) {
|
|
meta.fileName = decoder.decode(fileNamePrefix) + "/" + meta.fileName;
|
|
}
|
|
(["fileMode", "mtime", "uid", "gid"] as [
|
|
"fileMode",
|
|
"mtime",
|
|
"uid",
|
|
"gid"
|
|
]).forEach((key): void => {
|
|
const arr = trim(header[key]);
|
|
if (arr.byteLength > 0) {
|
|
meta[key] = parseInt(decoder.decode(arr), 8);
|
|
}
|
|
});
|
|
(["owner", "group"] as ["owner", "group"]).forEach((key): void => {
|
|
const arr = trim(header[key]);
|
|
if (arr.byteLength > 0) {
|
|
meta[key] = decoder.decode(arr);
|
|
}
|
|
});
|
|
|
|
// read the file content
|
|
const len = parseInt(decoder.decode(header.fileSize), 8);
|
|
let rest = len;
|
|
while (rest > 0) {
|
|
await this.reader.readFull(this.block);
|
|
const arr = rest < recordSize ? this.block.subarray(0, rest) : this.block;
|
|
await Deno.copy(writer, new Deno.Buffer(arr));
|
|
rest -= recordSize;
|
|
}
|
|
|
|
return meta;
|
|
}
|
|
}
|