75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
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/*
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json-stringify-safe
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Like JSON.stringify, but doesn't throw on circular references.
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Originally forked from https://github.com/isaacs/json-stringify-safe
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version 5.0.1 on 3/8/2017 and modified to handle Errors serialization
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and IE8 compatibility. Tests for this are in test/vendor.
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ISC license: https://github.com/isaacs/json-stringify-safe/blob/master/LICENSE
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*/
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exports = module.exports = stringify;
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exports.getSerialize = serializer;
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function indexOf(haystack, needle) {
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for (var i = 0; i < haystack.length; ++i) {
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if (haystack[i] === needle) return i;
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}
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return -1;
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}
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function stringify(obj, replacer, spaces, cycleReplacer) {
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return JSON.stringify(obj, serializer(replacer, cycleReplacer), spaces);
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}
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// https://github.com/ftlabs/js-abbreviate/blob/fa709e5f139e7770a71827b1893f22418097fbda/index.js#L95-L106
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function stringifyError(value) {
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var err = {
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// These properties are implemented as magical getters and don't show up in for in
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stack: value.stack,
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message: value.message,
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name: value.name
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};
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for (var i in value) {
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if (Object.prototype.hasOwnProperty.call(value, i)) {
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err[i] = value[i];
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}
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}
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return err;
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}
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function serializer(replacer, cycleReplacer) {
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var stack = [];
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var keys = [];
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if (cycleReplacer == null) {
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cycleReplacer = function(key, value) {
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if (stack[0] === value) {
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return '[Circular ~]';
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}
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return '[Circular ~.' + keys.slice(0, indexOf(stack, value)).join('.') + ']';
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};
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}
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return function(key, value) {
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if (stack.length > 0) {
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var thisPos = indexOf(stack, this);
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~thisPos ? stack.splice(thisPos + 1) : stack.push(this);
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~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key);
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if (~indexOf(stack, value)) {
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value = cycleReplacer.call(this, key, value);
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}
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} else {
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stack.push(value);
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}
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return replacer == null
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? value instanceof Error ? stringifyError(value) : value
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: replacer.call(this, key, value);
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};
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}
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