This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
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47 lines
1.2 KiB
47 lines
1.2 KiB
/** |
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* Copyright (c) 2015-present, Facebook, Inc. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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* |
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* @providesModule stringifySafe |
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* @flow |
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*/ |
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'use strict'; |
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/** |
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* Tries to stringify with JSON.stringify and toString, but catches exceptions |
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* (e.g. from circular objects) and always returns a string and never throws. |
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*/ |
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function stringifySafe(arg: any): string { |
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var ret; |
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var type = typeof arg; |
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if (arg === undefined) { |
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ret = 'undefined'; |
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} else if (arg === null) { |
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ret = 'null'; |
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} else if (type === 'string') { |
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ret = '"' + arg + '"'; |
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} else if (type === 'function') { |
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try { |
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ret = arg.toString(); |
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} catch (e) { |
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ret = '[function unknown]'; |
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} |
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} else { |
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// Perform a try catch, just in case the object has a circular |
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// reference or stringify throws for some other reason. |
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try { |
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ret = JSON.stringify(arg); |
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} catch (e) { |
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if (typeof arg.toString === 'function') { |
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try { |
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ret = arg.toString(); |
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} catch (E) {} |
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} |
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} |
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} |
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return ret || '["' + type + '" failed to stringify]'; |
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} |
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module.exports = stringifySafe;
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