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| <a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> pax.js |
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| <span class="strong">100% </span> |
| <span class="quiet">Statements</span> |
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| <span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">'use strict' |
| const Header = require('./header.js') |
| const path = require('path') |
| |
| class Pax { |
| constructor (obj, global) { |
| this.atime = obj.atime || null |
| this.charset = obj.charset || null |
| this.comment = obj.comment || null |
| this.ctime = obj.ctime || null |
| this.gid = obj.gid || null |
| this.gname = obj.gname || null |
| this.linkpath = obj.linkpath || null |
| this.mtime = obj.mtime || null |
| this.path = obj.path || null |
| this.size = obj.size || null |
| this.uid = obj.uid || null |
| this.uname = obj.uname || null |
| this.dev = obj.dev || null |
| this.ino = obj.ino || null |
| this.nlink = obj.nlink || null |
| this.global = global || false |
| } |
| |
| encode () { |
| const body = this.encodeBody() |
| if (body === '') |
| return null |
| |
| const bodyLen = Buffer.byteLength(body) |
| // round up to 512 bytes |
| // add 512 for header |
| const bufLen = 512 * Math.ceil(1 + bodyLen / 512) |
| const buf = Buffer.allocUnsafe(bufLen) |
| |
| // 0-fill the header section, it might not hit every field |
| for (let i = 0; i < 512; i++) { |
| buf[i] = 0 |
| } |
| |
| new Header({ |
| // XXX split the path |
| // then the path should be PaxHeader + basename, but less than 99, |
| // prepend with the dirname |
| path: ('PaxHeader/' + path.basename(this.path)).slice(0, 99), |
| mode: this.mode || 0o644, |
| uid: this.uid || null, |
| gid: this.gid || null, |
| size: bodyLen, |
| mtime: this.mtime || null, |
| type: this.global ? 'GlobalExtendedHeader' : 'ExtendedHeader', |
| linkpath: '', |
| uname: this.uname || '', |
| gname: this.gname || '', |
| devmaj: 0, |
| devmin: 0, |
| atime: this.atime || null, |
| ctime: this.ctime || null |
| }).encode(buf) |
| |
| buf.write(body, 512, bodyLen, 'utf8') |
| |
| // null pad after the body |
| for (let i = bodyLen + 512; i < buf.length; i++) { |
| buf[i] = 0 |
| } |
| |
| return buf |
| } |
| |
| encodeBody () { |
| return ( |
| this.encodeField('path') + |
| this.encodeField('ctime') + |
| this.encodeField('atime') + |
| this.encodeField('dev') + |
| this.encodeField('ino') + |
| this.encodeField('nlink') + |
| this.encodeField('charset') + |
| this.encodeField('comment') + |
| this.encodeField('gid') + |
| this.encodeField('gname') + |
| this.encodeField('linkpath') + |
| this.encodeField('mtime') + |
| this.encodeField('size') + |
| this.encodeField('uid') + |
| this.encodeField('uname') |
| ) |
| } |
| |
| encodeField (field) { |
| if (this[field] === null || this[field] === undefined) |
| return '' |
| const v = this[field] instanceof Date ? this[field].getTime() / 1000 |
| : this[field] |
| const s = ' ' + |
| (field === 'dev' || field === 'ino' || field === 'nlink' |
| ? 'SCHILY.' : '') + |
| field + '=' + v + '\n' |
| const byteLen = Buffer.byteLength(s) |
| // the digits includes the length of the digits in ascii base-10 |
| // so if it's 9 characters, then adding 1 for the 9 makes it 10 |
| // which makes it 11 chars. |
| let digits = Math.floor(Math.log(byteLen) / Math.log(10)) + 1 |
| if (byteLen + digits >= Math.pow(10, digits)) |
| digits += 1 |
| const len = digits + byteLen |
| return len + s |
| } |
| } |
| |
| Pax.parse = (string, ex, g) => new Pax(merge(parseKV(string), ex), g) |
| |
| const merge = (a, b) => |
| b ? Object.keys(a).reduce((s, k) => (s[k] = a[k], s), b) : a |
| |
| const parseKV = string => |
| string |
| .replace(/\n$/, '') |
| .split('\n') |
| .reduce(parseKVLine, Object.create(null)) |
| |
| const parseKVLine = (set, line) => { |
| const n = parseInt(line, 10) |
| |
| // XXX Values with \n in them will fail this. |
| // Refactor to not be a naive line-by-line parse. |
| if (n !== Buffer.byteLength(line) + 1) |
| return set |
| |
| line = line.substr((n + ' ').length) |
| const kv = line.split('=') |
| const k = kv.shift().replace(/^SCHILY\.(dev|ino|nlink)/, '$1') |
| if (!k) |
| return set |
| |
| const v = kv.join('=') |
| set[k] = /^([A-Z]+\.)?([mac]|birth|creation)time$/.test(k) |
| ? new Date(v * 1000) |
| : /^[0-9]+$/.test(v) ? +v |
| : v |
| return set |
| } |
| |
| module.exports = Pax |
| </pre></td></tr> |
| </table></pre> |
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