Merge pull request #564 from Instabug/Fix/network-logger-crash

[INSD-5139] Fix handling a network request body that is not a string

Author: ymabdallah

__tests__/xhrNetworkInterceptor.spec.js

@@ -63,7 +63,7 @@ describe('Network Interceptor', () => {
         const requestBody = { data: [{ item: 'first' }, { item: 'second' }] };
         Interceptor.enableInterception();
         Interceptor.setOnDoneCallback((network) => {
-            expect(network.requestBody).toEqual(requestBody);
+            expect(network.requestBody).toEqual(JSON.stringify(requestBody));
             done();
         })
         FakeRequest.open(method, url);
@@ -170,4 +170,4 @@ describe('Network Interceptor', () => {
     });
 
 
-});
+});

utils/XhrNetworkInterceptor.js

@@ -48,14 +48,18 @@ const XHRInterceptor = {
       if (network.requestHeaders === '') {
         network.requestHeaders = {};
       }
-      network.requestHeaders[header] = value;
+      network.requestHeaders[header] = typeof value === 'string' ? value : JSON.stringify(value);
       originalXHRSetRequestHeader.apply(this, arguments);
     };
 
     XMLHttpRequest.prototype.send = function(data) {
       var cloneNetwork = JSON.parse(JSON.stringify(network));
       cloneNetwork.requestBody = data ? data : '';
 
+      if (typeof cloneNetwork.requestBody !== "string") {
+        cloneNetwork.requestBody = JSON.stringify(cloneNetwork.requestBody);
+      }
+      
       if (this.addEventListener) {
         this.addEventListener(
           'readystatechange',