WebGL Error: "Uncaught TypeError: this.decompress is not a function"

I am having this error 4 times when opening the webGL website, it is should be caused by failure to decompress ".unityweb" files. Any idea how to solve this? This only happened in WeChat dev browser ( a chat app)

 

I am using Unity5.6.1

 

I tried 2017.1.1's UnityLoader.js but it also didn't work.

 

This is error in blob:

this.require = function () {
return {};
}; this.decompress = function (data) {
return data;
}; this.onmessage = function (e){var t={id:e.data.id,decompressed:this.decompress(e.data.compressed)};postMessage(t,t.decompressed?[t.decompressed.buffer]:[])}; postMessage({ ready: true });

 

I solved the problem by chaning the option to:

var options = ["this.require = ",decompressor.require,"; var vv = this;this.decompress = ",decompressor.decompress,"; this.onmessage = ",function(e){var t={id:e.data.id,decompressed:vv.decompress(e.data.compressed)};postMessage(t,t.decompressed?[t.decompressed.buffer]:[])},"; postMessage({ ready: true });"];

Anyone knows why this happened only in one specific browser?

 

Thanks for replying.

Can I ask
1. How will I know if the browser decompresses using javascript or browser built-in gzip decompression?

2. Do I need to set header of every ".unityweb" to content-encoding to gzip? It seems even I didn't specify this, the browser will still decompress using gzip.

3. Will browser built-in gzip decompression be faster than javascript decompression?

4. Is there any tip reducing loading and initialization time after downloading? Right now even an empty project is taking at around 10s to load on a middle-end mobile phone. (my way to calculate loading time is start a timer between "addRunDependency" and "removeRunDependency", and then stop the timer in one of the Start() function in the scene).

 

How to solve this problem?

 

Well, unity should fix this.

Is very simple to fix but i must edit unityloader.js, by my self, everytime i made a new build.

This bug happens in Chrome 50/Chrome 51 32 bits in Windows and in many other old browsers.

 

Fix is not available yet?!
We have encountered same problem in unity 5.6. If the fix will be in stable unity 2017 - may be we will migrate, but it's not expected to migrate now, we at release stage of our project, and encountered this error on winXP in chrome 49. The user not want to migrate from winXP, and chrome will not updates on winXP.

Also is it acceptable for unity overall to work in chrome 49? Or in any case we will encounter any other problems?

Is this code safe? Is it stable? For which unity version?

I have found only this reference to "this.decompress" in minified Build\UnityLoader.js

Code (CSharp):

1. new Blob(["this.require = ",r.require.toString(),"; this.decompress = ",r.decompress.toString(),"; this.onmessage = ",function(e){var t={id:e.data.id,decompressed:this.decompress(e.data.compressed)};

How to fix it?

 

decompress using browser built-in gzip is work (I see encoding in response header), but NOT eliminates this error on user's machine in chrome 49. Cache is cleared, user reloads page and redownload unityweb, as he say.

p.s. FIXED WITH HACK UnityLoader.js