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217 lines
7.4 KiB
217 lines
7.4 KiB
var WritableStream = require('stream').Writable
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|| require('readable-stream').Writable,
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inherits = require('util').inherits,
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inspect = require('util').inspect;
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var XRegExp = require('xregexp').XRegExp;
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var REX_LISTUNIX = XRegExp.cache('^(?<type>[\\-ld])(?<permission>([\\-r][\\-w][\\-xstT]){3})(?<acl>(\\+))?\\s+(?<inodes>\\d+)\\s+(?<owner>\\S+)\\s+(?<group>\\S+)\\s+(?<size>\\d+)\\s+(?<timestamp>((?<month1>\\w{3})\\s+(?<date1>\\d{1,2})\\s+(?<hour>\\d{1,2}):(?<minute>\\d{2}))|((?<month2>\\w{3})\\s+(?<date2>\\d{1,2})\\s+(?<year>\\d{4})))\\s+(?<name>.+)$'),
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REX_LISTMSDOS = XRegExp.cache('^(?<month>\\d{2})(?:\\-|\\/)(?<date>\\d{2})(?:\\-|\\/)(?<year>\\d{2,4})\\s+(?<hour>\\d{2}):(?<minute>\\d{2})\\s{0,1}(?<ampm>[AaMmPp]{1,2})\\s+(?:(?<size>\\d+)|(?<isdir>\\<DIR\\>))\\s+(?<name>.+)$'),
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RE_ENTRY_TOTAL = /^total/,
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RE_RES_END = /(?:^|\r?\n)(\d{3}) [^\r\n]*\r?\n/,
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RE_EOL = /\r?\n/g,
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RE_DASH = /\-/g;
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var MONTHS = {
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jan: 1, feb: 2, mar: 3, apr: 4, may: 5, jun: 6,
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jul: 7, aug: 8, sep: 9, oct: 10, nov: 11, dec: 12
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};
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function Parser(options) {
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if (!(this instanceof Parser))
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return new Parser(options);
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WritableStream.call(this);
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this._buffer = '';
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this._debug = options.debug;
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}
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inherits(Parser, WritableStream);
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Parser.prototype._write = function(chunk, encoding, cb) {
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var m, code, reRmLeadCode, rest = '', debug = this._debug;
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this._buffer += chunk.toString('binary');
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while (m = RE_RES_END.exec(this._buffer)) {
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// support multiple terminating responses in the buffer
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rest = this._buffer.substring(m.index + m[0].length);
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if (rest.length)
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this._buffer = this._buffer.substring(0, m.index + m[0].length);
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debug&&debug('[parser] < ' + inspect(this._buffer));
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// we have a terminating response line
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code = parseInt(m[1], 10);
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// RFC 959 does not require each line in a multi-line response to begin
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// with '<code>-', but many servers will do this.
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//
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// remove this leading '<code>-' (or '<code> ' from last line) from each
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// line in the response ...
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reRmLeadCode = '(^|\\r?\\n)';
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reRmLeadCode += m[1];
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reRmLeadCode += '(?: |\\-)';
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reRmLeadCode = new RegExp(reRmLeadCode, 'g');
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var text = this._buffer.replace(reRmLeadCode, '$1').trim();
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this._buffer = rest;
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debug&&debug('[parser] Response: code=' + code + ', buffer=' + inspect(text));
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this.emit('response', code, text);
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}
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cb();
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};
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Parser.parseFeat = function(text) {
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var lines = text.split(RE_EOL);
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lines.shift(); // initial response line
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lines.pop(); // final response line
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for (var i = 0, len = lines.length; i < len; ++i)
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lines[i] = lines[i].trim();
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// just return the raw lines for now
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return lines;
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};
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Parser.parseListEntry = function(line) {
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var ret,
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info,
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month, day, year,
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hour, mins;
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if (ret = XRegExp.exec(line, REX_LISTUNIX)) {
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info = {
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type: ret.type,
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name: undefined,
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target: undefined,
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sticky: false,
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rights: {
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user: ret.permission.substr(0, 3).replace(RE_DASH, ''),
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group: ret.permission.substr(3, 3).replace(RE_DASH, ''),
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other: ret.permission.substr(6, 3).replace(RE_DASH, '')
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},
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acl: (ret.acl === '+'),
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owner: ret.owner,
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group: ret.group,
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size: parseInt(ret.size, 10),
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date: undefined
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};
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// check for sticky bit
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var lastbit = info.rights.other.slice(-1);
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if (lastbit === 't') {
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info.rights.other = info.rights.other.slice(0, -1) + 'x';
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info.sticky = true;
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} else if (lastbit === 'T') {
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info.rights.other = info.rights.other.slice(0, -1);
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info.sticky = true;
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}
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if (ret.month1 !== undefined) {
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month = parseInt(MONTHS[ret.month1.toLowerCase()], 10);
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day = parseInt(ret.date1, 10);
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year = (new Date()).getFullYear();
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hour = parseInt(ret.hour, 10);
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mins = parseInt(ret.minute, 10);
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if (month < 10)
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month = '0' + month;
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if (day < 10)
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day = '0' + day;
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if (hour < 10)
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hour = '0' + hour;
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if (mins < 10)
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mins = '0' + mins;
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info.date = new Date(year + '-'
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+ month + '-'
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+ day + 'T'
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+ hour + ':'
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+ mins);
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// If the date is in the past but no more than 6 months old, year
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// isn't displayed and doesn't have to be the current year.
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//
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// If the date is in the future (less than an hour from now), year
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// isn't displayed and doesn't have to be the current year.
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// That second case is much more rare than the first and less annoying.
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// It's impossible to fix without knowing about the server's timezone,
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// so we just don't do anything about it.
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//
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// If we're here with a time that is more than 28 hours into the
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// future (1 hour + maximum timezone offset which is 27 hours),
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// there is a problem -- we should be in the second conditional block
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if (info.date.getTime() - Date.now() > 100800000) {
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info.date = new Date((year - 1) + '-'
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+ month + '-'
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+ day + 'T'
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+ hour + ':'
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+ mins);
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}
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// If we're here with a time that is more than 6 months old, there's
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// a problem as well.
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// Maybe local & remote servers aren't on the same timezone (with remote
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// ahead of local)
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// For instance, remote is in 2014 while local is still in 2013. In
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// this case, a date like 01/01/13 02:23 could be detected instead of
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// 01/01/14 02:23
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// Our trigger point will be 3600*24*31*6 (since we already use 31
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// as an upper bound, no need to add the 27 hours timezone offset)
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if (Date.now() - info.date.getTime() > 16070400000) {
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info.date = new Date((year + 1) + '-'
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+ month + '-'
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+ day + 'T'
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+ hour + ':'
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+ mins);
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}
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} else if (ret.month2 !== undefined) {
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month = parseInt(MONTHS[ret.month2.toLowerCase()], 10);
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day = parseInt(ret.date2, 10);
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year = parseInt(ret.year, 10);
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if (month < 10)
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month = '0' + month;
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if (day < 10)
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day = '0' + day;
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info.date = new Date(year + '-' + month + '-' + day);
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}
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if (ret.type === 'l') {
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var pos = ret.name.indexOf(' -> ');
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info.name = ret.name.substring(0, pos);
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info.target = ret.name.substring(pos+4);
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} else
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info.name = ret.name;
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ret = info;
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} else if (ret = XRegExp.exec(line, REX_LISTMSDOS)) {
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info = {
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name: ret.name,
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type: (ret.isdir ? 'd' : '-'),
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size: (ret.isdir ? 0 : parseInt(ret.size, 10)),
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date: undefined,
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};
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month = parseInt(ret.month, 10),
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day = parseInt(ret.date, 10),
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year = parseInt(ret.year, 10),
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hour = parseInt(ret.hour, 10),
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mins = parseInt(ret.minute, 10);
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if (year < 70)
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year += 2000;
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else
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year += 1900;
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if (ret.ampm[0].toLowerCase() === 'p' && hour < 12)
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hour += 12;
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else if (ret.ampm[0].toLowerCase() === 'a' && hour === 12)
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hour = 0;
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info.date = new Date(year, month - 1, day, hour, mins);
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ret = info;
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} else if (!RE_ENTRY_TOTAL.test(line))
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ret = line; // could not parse, so at least give the end user a chance to
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// look at the raw listing themselves
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return ret;
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};
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module.exports = Parser;
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