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node-red/red/storage/index.js

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/**
* Copyright 2013, 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
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var when = require('when');
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var storageModule;
var settingsAvailable;
var sessionsAvailable;
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function moduleSelector(aSettings) {
var toReturn;
if (aSettings.storageModule) {
if (typeof aSettings.storageModule === "string") {
// TODO: allow storage modules to be specified by absolute path
toReturn = require("./"+aSettings.storageModule);
} else {
toReturn = aSettings.storageModule;
}
} else {
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toReturn = require("./localfilesystem");
}
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return toReturn;
}
function is_malicious(path) {
return path.indexOf('../') != -1 || path.indexOf('..\\') != -1;
}
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var storageModuleInterface = {
init: function(settings) {
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try {
storageModule = moduleSelector(settings);
settingsAvailable = storageModule.hasOwnProperty("getSettings") && storageModule.hasOwnProperty("saveSettings");
sessionsAvailable = storageModule.hasOwnProperty("getSessions") && storageModule.hasOwnProperty("saveSessions");
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} catch (e) {
return when.reject(e);
}
return storageModule.init(settings);
},
getFlows: function() {
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return storageModule.getFlows();
},
saveFlows: function(flows) {
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return storageModule.saveFlows(flows);
},
getCredentials: function() {
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return storageModule.getCredentials();
},
saveCredentials: function(credentials) {
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return storageModule.saveCredentials(credentials);
},
getSettings: function() {
if (settingsAvailable) {
return storageModule.getSettings();
} else {
return when.resolve(null);
}
},
saveSettings: function(settings) {
if (settingsAvailable) {
return storageModule.saveSettings(settings);
} else {
return when.resolve();
}
},
getSessions: function() {
if (sessionsAvailable) {
return storageModule.getSessions();
} else {
return when.resolve(null);
}
},
saveSessions: function(sessions) {
if (sessionsAvailable) {
return storageModule.saveSessions(sessions);
} else {
return when.resolve();
}
},
/* Library Functions */
getLibraryEntry: function(type, path) {
if (is_malicious(path)) {
return when.reject(new Error('forbidden flow name'));
}
return storageModule.getLibraryEntry(type, path);
},
saveLibraryEntry: function(type, path, meta, body) {
if (is_malicious(path)) {
return when.reject(new Error('forbidden flow name'));
}
return storageModule.saveLibraryEntry(type, path, meta, body);
},
/* Deprecated functions */
getAllFlows: function() {
if (storageModule.hasOwnProperty("getAllFlows")) {
return storageModule.getAllFlows();
} else {
return listFlows("/");
}
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},
getFlow: function(fn) {
if (is_malicious(fn)) {
return when.reject(new Error('forbidden flow name'));
}
if (storageModule.hasOwnProperty("getFlow")) {
return storageModule.getFlow(fn);
} else {
return storageModule.getLibraryEntry("flows",fn);
}
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},
saveFlow: function(fn, data) {
if (is_malicious(fn)) {
return when.reject(new Error('forbidden flow name'));
}
if (storageModule.hasOwnProperty("saveFlow")) {
return storageModule.saveFlow(fn, data);
} else {
return storageModule.saveLibraryEntry("flows",fn,{},data);
}
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}
/* End deprecated functions */
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}
function listFlows(path) {
return storageModule.getLibraryEntry("flows",path).then(function(res) {
return when.promise(function(resolve) {
var promises = [];
res.forEach(function(r) {
if (typeof r === "string") {
promises.push(listFlows(path+r));
} else {
promises.push(when.resolve(r));
}
});
var i=0;
when.settle(promises).then(function(res2) {
var result = {};
res2.forEach(function(r) {
// TODO: name||fn
if (r.value.fn) {
var name = r.value.name;
if (!name) {
name = r.value.fn.split(".")[0];
}
result.f = result.f || [];
result.f.push(name);
} else {
result.d = result.d || {};
result.d[res[i]] = r.value;
//console.log(">",r.value);
}
i++;
});
resolve(result);
});
});
});
}
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module.exports = storageModuleInterface;