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'use strict';
var async = require('async'),
fs = require('fs'),
path = require('path'),
rm = require('del'),
debug = require('debug')('files'),
mkdirp = require('mkdirp'),
HttpError = require('connect-lastmile').HttpError,
HttpSuccess = require('connect-lastmile').HttpSuccess;
var gBasePath;
exports = module.exports = function (basePath) {
gBasePath = basePath;
return {
get: get,
put: put,
post: post,
del: del
};
};
// http://stackoverflow.com/questions/11293857/fastest-way-to-copy-file-in-node-js
function copyFile(source, target, cb) {
var cbCalled = false;
// ensure directory
mkdirp(path.dirname(target), function (error) {
if (error) return cb(error);
var rd = fs.createReadStream(source);
rd.on("error", function(err) {
done(err);
});
var wr = fs.createWriteStream(target);
wr.on("error", function(err) {
done(err);
});
wr.on("close", function(ex) {
done();
});
rd.pipe(wr);
function done(err) {
if (!cbCalled) {
cb(err);
cbCalled = true;
}
}
});
}
function createDirectory(targetPath, callback) {
mkdirp(targetPath, function (error) {
if (error) return callback(error);
callback(null);
});
}
function isProtected(targetPath) {
return targetPath.indexOf(getAbsolutePath('_admin')) === 0;
}
function getAbsolutePath(filePath) {
var absoluteFilePath = path.resolve(path.join(gBasePath, filePath));
if (absoluteFilePath.indexOf(gBasePath) !== 0) return null;
return absoluteFilePath;
}
function removeBasePath(filePath) {
return filePath.slice(gBasePath.length);
}
function get(req, res, next) {
var filePath = decodeURIComponent(req.params[0]);
var absoluteFilePath = getAbsolutePath(filePath);
if (!absoluteFilePath) return next(new HttpError(403, 'Path not allowed'));
fs.stat(absoluteFilePath, function (error, result) {
if (error) return next(new HttpError(404, error));
debug('get', absoluteFilePath);
if (!result.isDirectory() && !result.isFile()) return next(new HttpError(500, 'unsupported type'));
if (result.isFile()) return res.download(absoluteFilePath);
async.map(fs.readdirSync(absoluteFilePath), function (filePath, callback) {
fs.stat(path.join(absoluteFilePath, filePath), function (error, result) {
if (error) return callback(error);
callback(null, {
isDirectory: result.isDirectory(),
isFile: result.isFile(),
atime: result.atime,
mtime: result.mtime,
ctime: result.ctime,
birthtime: result.birthtime,
size: result.size,
filePath: filePath
});
});
}, function (error, results) {
if (error) return next(new HttpError(500, error));
res.status(222).send({ entries: results });
});
});
}
function post(req, res, next) {
var filePath = decodeURIComponent(req.params[0]);
if (!(req.files && req.files.file) && !req.query.directory) return next(new HttpError(400, 'missing file or directory'));
if ((req.files && req.files.file) && req.query.directory) return next(new HttpError(400, 'either file or directory'));
debug('post:', filePath);
var absoluteFilePath = getAbsolutePath(filePath);
if (!absoluteFilePath || isProtected(absoluteFilePath)) return next(new HttpError(403, 'Path not allowed'));
fs.stat(absoluteFilePath, function (error, result) {
if (error && error.code !== 'ENOENT') return next(new HttpError(500, error));
if (result && req.query.directory) return next(new HttpError(409, 'name already exists'));
if (result && result.isDirectory()) return next(new HttpError(409, 'cannot post on directories'));
if (req.query.directory) {
return createDirectory(absoluteFilePath, function (error) {
if (error) return next(new HttpError(500, error));
next(new HttpSuccess(201, {}));
});
} else if (!result || result.isFile()) {
return copyFile(req.files.file.path, absoluteFilePath, function (error) {
if (error) return next(new HttpError(500, error));
next(new HttpSuccess(201, {}));
});
}
return next(new HttpError(500, 'unsupported type'));
});
}
function put(req, res, next) {
var oldFilePath = decodeURIComponent(req.params[0]);
if (!req.body || !req.body.newFilePath) return next(new HttpError(400, 'missing newFilePath'));
var newFilePath = decodeURIComponent(req.body.newFilePath);
debug('put: %s -> %s', oldFilePath, newFilePath);
var absoluteOldFilePath = getAbsolutePath(oldFilePath);
if (!absoluteOldFilePath || isProtected(absoluteOldFilePath)) return next(new HttpError(403, 'Path not allowed'));
var absoluteNewFilePath = getAbsolutePath(newFilePath);
if (!absoluteNewFilePath || isProtected(absoluteNewFilePath)) return next(new HttpError(403, 'Path not allowed'));
fs.rename(absoluteOldFilePath, absoluteNewFilePath, function (error) {
if (error) return next (new HttpError(500, error));
debug('put: successful');
return next(new HttpSuccess(200, {}));
});
}
function del(req, res, next) {
var filePath = decodeURIComponent(req.params[0]);
var recursive = !!req.query.recursive;
var dryRun = !!req.query.dryRun;
var absoluteFilePath = getAbsolutePath(filePath);
if (!absoluteFilePath) return next(new HttpError(404, 'Not found'));
if (isProtected(absoluteFilePath)) return next(new HttpError(403, 'Path not allowed'));
// absoltueFilePath has to have the base path prepended
if (absoluteFilePath.length <= gBasePath.length) return next(new HttpError(404, 'Not found'));
fs.stat(absoluteFilePath, function (error, result) {
if (error) return next(new HttpError(404, error));
if (result.isDirectory() && !recursive) return next(new HttpError(403, 'Is directory'));
// add globs to get file listing
if (result.isDirectory()) absoluteFilePath += '/**';
rm(absoluteFilePath, { dryRun: dryRun, force: true }).then(function (result) {
result = result.map(removeBasePath);
next(new HttpSuccess(200, { entries: result }));
}, function (error) {
console.error(error);
next(new HttpError(500, 'Unable to remove'));
});
});
}
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