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node-red/red/util.js

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/**
* Copyright 2014 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.
**/
var clone = require("clone");
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function ensureString(o) {
if (Buffer.isBuffer(o)) {
return o.toString();
} else if (typeof o === "object") {
return JSON.stringify(o);
} else if (typeof o === "string") {
return o;
}
return ""+o;
}
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function ensureBuffer(o) {
if (Buffer.isBuffer(o)) {
return o;
} else if (typeof o === "object") {
o = JSON.stringify(o);
} else if (typeof o !== "string") {
o = ""+o;
}
return new Buffer(o);
}
function cloneMessage(msg) {
// Temporary fix for #97
// TODO: remove this http-node-specific fix somehow
var req = msg.req;
var res = msg.res;
delete msg.req;
delete msg.res;
var m = clone(msg);
if (req) {
m.req = req;
msg.req = req;
}
if (res) {
m.res = res;
msg.res = res;
}
return m;
}
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module.exports = {
ensureString: ensureString,
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ensureBuffer: ensureBuffer,
cloneMessage: cloneMessage
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};