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fs-ops.js
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fs-ops.js
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/**
* Copyright 2018 Dean Cording <dean@cording.id.au>
*
* 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.
**/
const util = require('util');
const fs = require('fs');
const path = require('path');
module.exports = function(RED) {
"use strict";
function setProperty(node, msg, name, type, value) {
if (type === 'msg') {
RED.util.setMessageProperty(msg,name,value);
} else if (type === 'flow') {
node.context().flow.set(name,value);
} else if (type === 'global') {
node.context().global.set(name,value);
}
}
function MoveNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.sourcePath = n.sourcePath || "";
node.sourcePathType = n.sourcePathType || "str";
node.sourceFilename = n.sourceFilename || "";
node.sourceFilenameType = n.sourceFilenameType || "str";
node.destPath = n.destPath || "";
node.destPathType = n.destPathType || "str";
node.destFilename = n.destFilename || "";
node.destFilenameType = n.destFilenameType || "str";
node.link = n.link;
if (node.link === undefined) node.link = false;
node.on("input", function(msg) {
var source = RED.util.evaluateNodeProperty(node.sourcePath, node.sourcePathType, node, msg);
if ((source.length > 0) && (source.lastIndexOf(path.sep) != source.length-1)) {
source += path.sep;
}
source += RED.util.evaluateNodeProperty(node.sourceFilename, node.sourceFilenameType, node, msg);
var destPath = RED.util.evaluateNodeProperty(node.destPath, node.destPathType, node, msg);
var destFile = destPath;
if ((destFile.length > 0) && (destFile.lastIndexOf(path.sep) != destFile.length-1)) {
destFile += path.sep;
}
destFile += RED.util.evaluateNodeProperty(node.destFilename, node.destFilenameType, node, msg);
if (node.link) {
try {
fs.unlinkSync(destFile);
} catch (err) {
if (err.code === 'EISDIR') {
// rmdir instead
try {
fs.rmdirSync(destFile);
} catch (ed) {
if (ed.code != 'ENOENT') {
// deleting non-existent directory is OK
node.error(ed, msg);
return;
}
}
} else if (err.code != 'ENOENT') {
// Deleting a non-existent file is not an error
node.error(err, msg);
return;
}
}
fs.symlink(source,destFile, (err) => {
if (err) {
node.error(err, msg);
} else {
node.send(msg);
}
});
return;
} else {
try {
fs.renameSync(source, destFile);
} catch (e) {
if (e.code === 'EXDEV') {
// Cross devices move - need to copy and delete
try {
// fs.pipe doesn't seem to handle exceptions properly
// Need to check we can access files
fs.accessSync(source, fs.R_OK | fs.W_OK);
fs.accessSync(destPath, fs.W_OK);
var is = fs.createReadStream(source);
var os = fs.createWriteStream(destFile);
is.on('end', function() {
try {
fs.unlinkSync(source);
} catch (e) {
node.error(e, msg);
return;
}
node.send(msg);
});
is.pipe(os);
return;
} catch (e) {
node.error(e, msg);
return;
}
} else {
node.error(e, msg);
return;
}
}
node.send(msg);
}
});
}
RED.nodes.registerType("fs-ops-move", MoveNode);
function CopyNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.sourcePath = n.sourcePath || "";
node.sourcePathType = n.sourcePathType || "str";
node.sourceFilename = n.sourceFilename || "";
node.sourceFilenameType = n.sourceFilenameType || "str";
node.destPath = n.destPath || "";
node.destPathType = n.destPathType || "str";
node.destFilename = n.destFilename || "";
node.destFilenameType = n.destFilenameType || "str";
node.link = n.link;
node.overwrite = n.overwrite;
if (node.link === undefined) node.link = false;
if (node.overwrite === undefined) node.overwrite = false;
node.on("input", function(msg) {
var source = RED.util.evaluateNodeProperty(node.sourcePath, node.sourcePathType, node, msg);
if ((source.length > 0) && (source.lastIndexOf(path.sep) != source.length-1)) {
source += path.sep;
}
source += RED.util.evaluateNodeProperty(node.sourceFilename, node.sourceFilenameType, node, msg);
var destPath = RED.util.evaluateNodeProperty(node.destPath, node.destPathType, node, msg);
var destFile = destPath;
if ((destFile.length > 0) && (destFile.lastIndexOf(path.sep) != destFile.length-1)) {
destFile += path.sep;
}
destFile += RED.util.evaluateNodeProperty(node.destFilename, node.destFilenameType, node, msg);
if (node.link) {
if (node.overwrite) {
try {
fs.unlinkSync(destFile);
} catch (err) {
if (err.code === 'EISDIR') {
// rmdir instead
try {
fs.rmdirSync(destFile);
} catch (ed) {
if (ed.code != 'ENOENT') {
// deleting non-existent directory is OK
node.error(ed, msg);
return;
}
}
} else if (err.code != 'ENOENT') {
// Deleting a non-existent file is not an error
node.error(err, msg);
return;
}
}
}
fs.symlink(source,destFile, (err) => {
if (err) {
node.error(err, msg);
} else {
node.send(msg);
}
});
} else {
if (fs.copyFile) {
// fs.copyFile introduced in Node 8.5.0
fs.copyFile(source, destFile, (node.overwrite ? 0 : fs.constants.COPYFILE_EXCL), (err) => {
if (err) {
node.error(err, msg);
} else {
node.send(msg);
}
});
} else {
if (!node.overwrite) {
try {
fs.accessSync(destFile, fs.F_OK);
node.error("File exists", msg);
return;
} catch(e) {
// All good - file doesn't exist
}
}
try {
// is.pipe doesn't seem to handle exceptions properly
// Need to check we can access files
fs.accessSync(source, fs.R_OK);
fs.accessSync(destPath, fs.W_OK);
var is = fs.createReadStream(source);
var os = fs.createWriteStream(destFile);
is.on('end', function() {
node.send(msg);
});
is.pipe(os);
return;
} catch (e) {
node.error(e, msg);
return;
}
}
}
return;
});
}
RED.nodes.registerType("fs-ops-copy", CopyNode);
function DeleteNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "msg";
node.on("input", function(msg) {
var error = false;
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filename = RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var deleteFile = function(file) {
var p = path.join(pathname ? pathname : "", file ? file : "");
if(fs.existsSync(p)) {
const stats = fs.lstatSync(p);
try {
if (stats.isFile()) {
fs.unlinkSync(p);
} else if(stats.isDirectory()) {
fs.rmdirSync(p);
}
} catch(e) {
node.error(e, msg);
error = true;
}
}
}
if (Array.isArray(filename)) {
filename.forEach(deleteFile);
} else {
deleteFile(filename);
}
if (!error) {
node.send(msg);
}
});
}
RED.nodes.registerType("fs-ops-delete", DeleteNode);
function AccessNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "str";
node.read = n.read;
node.write = n.write;
node.throwerror = n.throwerror;
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
pathname += RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var mode = fs.F_OK;
if (node.read) mode |= fs.R_OK;
if (node.write) mode |= fs.W_OK;
try {
fs.accessSync(pathname, mode);
} catch (e) {
if (node.throwerror) node.error("File " + pathname + " is not accessible " + e, msg);
if (msg.error) msg._error = Object.assign({}, msg.error);
msg.error = {message: "File " + pathname + " is not accessible " + e};
msg.error.source = {id: node.id, type: node.type, name: node.name};
node.send([null, msg]);
return;
}
node.send([msg, null]);
});
}
RED.nodes.registerType("fs-ops-access", AccessNode);
function SizeNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "msg";
node.size = n.size || "";
node.sizeType = n.sizeType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filename = RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var size;
try {
if (Array.isArray(filename)) {
size = [];
filename.forEach(function(file) {
size.push(fs.statSync(pathname + file).size);
});
} else {
size = fs.statSync(pathname + filename).size;
}
} catch (e) {
node.error(e,msg);
return;
}
setProperty(node, msg, node.size, node.sizeType, size);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-size", SizeNode);
function StatsNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "msg";
node.stats = n.stats || "";
node.statsType = n.statsType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filename = RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var stats;
try {
if (Array.isArray(filename)) {
stats = [];
filename.forEach(function(file) {
stats.push(fs.statSync(pathname + file));
});
} else {
stats = fs.statSync(pathname + filename);
}
} catch (e) {
node.error(e,msg);
return;
}
setProperty(node, msg, node.stats, node.statsType, stats);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-stats", StatsNode);
function LinkNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "msg";
node.link = n.link || "";
node.linkType = n.linkType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filename = RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var link;
if (Array.isArray(filename)) {
link = [];
filename.forEach(function(file) {
try {
link.push(fs.readlinkSync(pathname + file));
} catch (e) {
if (e.code === 'EINVAL') {
link.push('');
} else {
node.error(e, msg);
return;
}
}
});
} else {
try {
link = fs.readlinkSync(pathname + filename);
} catch (e) {
if (e.code === 'EINVAL') {
link = '';
} else {
node.error(e, msg);
return;
}
}
}
setProperty(node, msg, node.link, node.linkType, link);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-link", LinkNode);
function TypeNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filename = n.filename || "";
node.filenameType = n.filenameType || "msg";
node.filetype = n.filetype || "";
node.filetypeType = n.filetypeType || "msg";
function getType(filetype) {
if (filetype.isFile()) return 'F';
if (filetype.isDirectory()) return 'D';
if (filetype.isCharacterDevice()) return 'C';
if (filetype.isSymbolicLink()) return 'L';
if (filetype.isBlockDevice()) return 'B';
return 'S';
}
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filename = RED.util.evaluateNodeProperty(node.filename, node.filenameType, node, msg);
var filetype;
try {
if (Array.isArray(filename)) {
filetype = [];
filename.forEach(function(file) {
filetype.push(getType(fs.statSync(pathname + file)));
});
} else {
filetype = getType(fs.lstatSync(pathname + filename));
}
} catch (e) {
node.error(e, msg);
return;
}
setProperty(node, msg, node.filetype, node.filetypeType, filetype);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-type", TypeNode);
function DirNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.filter = n.filter || "*";
node.filterType = n.filterType || "msg";
node.dir = n.dir || "";
node.dirType = n.dirType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
var filter = RED.util.evaluateNodeProperty(node.filter, node.filterType, node, msg);
var dir;
filter = filter.replace('.', '\\.');
filter = filter.replace('*', '.*');
filter = new RegExp(filter);
try {
dir = fs.readdirSync(pathname);
dir = dir.filter(function(value) { return filter.test(value); });
} catch (e) {
node.error(e, msg);
return;
}
setProperty(node, msg, node.dir, node.dirType, dir);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-dir", DirNode);
function MkdirNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.dirname = n.dirname || "";
node.dirnameType = n.dirnameType || "msg";
node.recursive = n.recursive || false;
node.mode = parseInt(n.mode, 8);
node.fullpath = n.fullpath || "";
node.fullpathType = n.fullpathType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
pathname += RED.util.evaluateNodeProperty(node.dirname, node.dirnameType, node, msg);
try {
fs.mkdirSync(pathname, {mode: node.mode, recursive: node.recursive});
} catch (e) {
// Creating an existing directory is not an error
if (e.code != 'EEXIST') {
node.error(e, msg);
return;
}
}
if (node.fullpath.length > 0) {
setProperty(node, msg, node.fullpath, node.fullpathType, pathname);
}
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-mkdir", MkdirNode);
function MktmpdirNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.name = n.name;
node.path = n.path || "";
node.pathType = n.pathType || "str";
node.prefix = n.prefix || "";
node.prefixType = n.prefixType || "msg";
node.fullpath = n.fullpath || "";
node.fullpathType = n.fullpathType || "msg";
node.on("input", function(msg) {
var pathname = RED.util.evaluateNodeProperty(node.path, node.pathType, node, msg);
if ((pathname.length > 0) && (pathname.lastIndexOf(path.sep) != pathname.length-1)) {
pathname += path.sep;
}
pathname += RED.util.evaluateNodeProperty(node.prefix, node.prefixType, node, msg);
try {
if (fs.mkdtempSync) {
pathname = fs.mkdtempSync(pathname);
} else {
pathname += Math.random().toString(16).slice(2,8);
fs.mkdirSync(pathname);
}
} catch (e) {
node.error(e, msg);
return;
}
setProperty(node, msg, node.fullpath, node.fullpathType, pathname);
node.send(msg);
});
}
RED.nodes.registerType("fs-ops-mktmpdir", MktmpdirNode);
};