Current File : //lib/node_modules/pm2/node_modules/get-uri/file.js
/**
* Module dependencies.
*/
var fs = require('fs');
var uri2path = require('file-uri-to-path');
var NotFoundError = require('./notfound');
var NotModifiedError = require('./notmodified');
var debug = require('debug')('get-uri:file');
/**
* Module exports.
*/
module.exports = get;
/**
* Returns a `fs.ReadStream` instance from a "file:" URI.
*
* @api protected
*/
function get (parsed, opts, fn) {
var fd;
var cache = opts.cache;
// same as in fs.ReadStream's constructor
var flags = opts.hasOwnProperty('flags') ? options.flags : 'r';
var mode = opts.hasOwnProperty('mode') ? options.mode : 438; /*=0666*/
// convert URI → Path
var uri = parsed.href;
var filepath = uri2path(uri);
debug('normalized pathname: %o', filepath);
// open() first to get a fd and ensure that the file exists
fs.open(filepath, flags, mode, onopen);
function onerror (err) {
if ('number' == typeof fd) {
fs.close(fd, onclose);
}
fn(err);
}
function onclose () {
debug('closed fd %o', fd);
}
function onopen (err, _fd) {
if (err) {
if ('ENOENT' == err.code) {
err = new NotFoundError();
}
return onerror(err);
}
fd = _fd;
// now fstat() to check the `mtime` and store the stat object for the cache
fs.fstat(fd, onstat);
}
function onstat (err, stat) {
if (err) return onerror(err);
// if a `cache` was provided, check if the file has not been modified
if (cache && cache.stat && stat && isNotModified(cache.stat, stat)) {
return onerror(new NotModifiedError());
}
// `fs.ReadStream` takes care of calling `fs.close()` on the
// fd after it's done reading
opts.fd = fd;
var rs = fs.createReadStream(null, opts);
rs.stat = stat;
fn(null, rs);
}
// returns `true` if the `mtime` of the 2 stat objects are equal
function isNotModified (prev, curr) {
return +prev.mtime == +curr.mtime;
}
}
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