Vendor in json-stringify-safe to avoid circular JSON references

Author: mattrobenolt

src/raven.js

@@ -4,6 +4,7 @@
 var TraceKit = require('../vendor/TraceKit/tracekit');
 var RavenConfigError = require('./configError');
 var utils = require('./utils');
+var stringify = require('../vendor/json-stringify-safe/stringify');
 
 var isFunction = utils.isFunction;
 var isUndefined = utils.isUndefined;
@@ -428,7 +429,7 @@ Raven.prototype = {
      */
     getContext: function() {
         // lol javascript
-        return JSON.parse(JSON.stringify(this._globalContext));
+        return JSON.parse(stringify(this._globalContext));
     },
 
     /*
@@ -1285,7 +1286,7 @@ Raven.prototype = {
         // NOTE: auth is intentionally sent as part of query string (NOT as custom
         //       HTTP header) so as to avoid preflight CORS requests
         request.open('POST', url + '?' + urlencode(opts.auth));
-        request.send(JSON.stringify(opts.data));
+        request.send(stringify(opts.data));
     },
 
     // Note: this is shitty, but I can't figure out how to get

vendor/json-stringify-safe/stringify.js

@@ -0,0 +1,27 @@
+exports = module.exports = stringify
+exports.getSerialize = serializer
+
+function stringify(obj, replacer, spaces, cycleReplacer) {
+  return JSON.stringify(obj, serializer(replacer, cycleReplacer), spaces)
+}
+
+function serializer(replacer, cycleReplacer) {
+  var stack = [], keys = []
+
+  if (cycleReplacer == null) cycleReplacer = function(key, value) {
+    if (stack[0] === value) return "[Circular ~]"
+    return "[Circular ~." + keys.slice(0, stack.indexOf(value)).join(".") + "]"
+  }
+
+  return function(key, value) {
+    if (stack.length > 0) {
+      var thisPos = stack.indexOf(this)
+      ~thisPos ? stack.splice(thisPos + 1) : stack.push(this)
+      ~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key)
+      if (~stack.indexOf(value)) value = cycleReplacer.call(this, key, value)
+    }
+    else stack.push(value)
+
+    return replacer == null ? value : replacer.call(this, key, value)
+  }
+}