Strange exception in WWW constructor

Hey guys,

I cant' figure out what's wrong with following code.

Code (CSharp):

1. var form = new WWWForm();
2. form.AddField("field1", value1);
3. form.AddField("field2", value2);
4. // ...
5. form.AddField("fieldn", valuen);
6. var req = new WWW(someValidUrl, form)

It looks safe. But when I run it in Firefox I see following exception.

Spoiler: Exception

"exception thrown: [Exception... "<no message>" nsresult: "0x805e0006 (<unknown>)" location: "JS frame :: https://url/SV.js :: _JS_WebRequest_Create :: line 9391" data: no],_JS_WebRequest_Create@https://url/SV.js:9391:1
__ZN13EmscriptenWWWC2EPKcS1_iRKNSt3__13mapINS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEES9_NS2_4lessIS9_EENS7_INS2_4pairIKS9_S9_EEEEEEb7Hash128j@https://url/SV.js:4158878:6
__ZN3WWW6CreateEPKcS1_iRKNSt3__13mapINS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEES9_NS2_4lessIS9_EENS7_INS2_4pairIKS9_S9_EEEEEEbb7Hash128j@https://url/SV.js:4239376:1
__Z18WWW_CUSTOM_InitWWWP15ScriptingObjectP15ScriptingStringP14ScriptingArrayS4_@https://url/SV.js:3719256:24
dynCall_viiii@https://url/SV.js:6374671:1
invoke_viiii@https://url/SV.js:19018:2
_WWW_InitWWW_m20909@https://url/SV.js:5495085:2
dynCall_viiiii@https://url/SV.js:6365188:1
invoke_viiiii@https://url/SV.js:19026:2
_WWW__ctor_m14461@https://url/SV.js:4950725:7
dynCall_viiii@https://url/SV.js:6374671:1
invoke_viiii@https://url/SV.js:19018:2
_U3CPostU3Ec__IteratorF_MoveNext_m1521@https://url/SV.js:655301:6

So I checked once again what's inside of that Form, and it's

Spoiler: Form.data

hash=MQAwADAAOQAxADMAMAA1ADYANgAyADEANAA5ADAANgA0ADMANAAzAA%3d%3d&_guid=YQAxAGMAOAA3AGMANQA4AC0AMwBkADAAZQAtADQAMwBjAGMALQA4ADYAOQAzAC0ANgBlADcAZgA5ADUAZABmAGIAYwA4ADIA&_deviceId=dwAtAG4ALwBhAA%3d%3d&gameVersion=36&env=dev&registerDevice=1

To get this value I did

Code (CSharp):

1. System.Text.Encoding.Default.GetString(form.data)

.

Any clues?

 

What is inside the URL string ?

 

I had the exact same problem in Unity 5.2.2f1 when trying to make post request to my http://Url.Of.ASP.WebHandler.ashx in Firefox

Google Chrome logged more informative message in my case. I had two problems related to mixed (HTTP and HTTPS) content :
https://www.facebook.com/notes/hype...tabs-mixed-content-warnings/10150223945345844
and CORS :
http://docs.unity3d.com/Manual/webgl-networking.html