mirror of https://github.com/node-red/node-red.git
73 lines
2.0 KiB
JavaScript
73 lines
2.0 KiB
JavaScript
/**
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* Copyright 2015 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var fs = require('fs');
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var when = require('when');
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var nodeFn = require('when/node/function');
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var fspath = require("path");
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var settings;
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var sessionsFile;
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var sessions = {};
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/**
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* Write content to a file using UTF8 encoding.
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* This forces a fsync before completing to ensure
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* the write hits disk.
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*/
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function writeFile(path,content) {
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return when.promise(function(resolve,reject) {
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var stream = fs.createWriteStream(path);
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stream.on('open',function(fd) {
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stream.end(content,'utf8',function() {
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fs.fsync(fd,resolve);
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});
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});
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stream.on('error',function(err) {
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reject(err);
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});
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});
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}
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var api = module.exports = {
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init: function(_settings) {
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settings = _settings;
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var userDir = settings.userDir || process.env.NODE_RED_HOME;
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sessionsFile = fspath.join(userDir,".sessions.json");
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try {
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sessions = JSON.parse(fs.readFileSync(sessionsFile,'utf8'));
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} catch(err) {
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sessions = {};
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}
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return when.resolve();
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},
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get: function(token) {
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return when.resolve(sessions[token]);
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},
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create: function(token,session) {
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sessions[token] = session;
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return writeFile(sessionsFile,JSON.stringify(sessions));
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},
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delete: function(token) {
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delete sessions[token];
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return writeFile(sessionsFile,JSON.stringify(sessions));
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}
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}
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