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Google earth is not loading in v93.1.1.140 · cefsharp/CefSharp · Discussion #3826 · GitHub

Sep 24, 2021 · 8 comments · 4 replies

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Hello Team,

I have downloaded the CefSharp.MinimalExample from the GitHub repo https://github.com/cefsharp/CefSharp.MinimalExample.

Which is having the CefSharp NuGet package with version 93.1.1.140, I am running WPF app on my windows 10 x64 machine (project platform set to x64 in visual studio).

And when I run the project and navigate to http://earth.google.com in the browser, the web page is not loading even after 2minutes.

I made some changes to the App.xaml file to enable WebGL, even after that, I observed the same behavior with Google earth.

settings.CefCommandLineArgs.Add("enable-gpu");
settings.CefCommandLineArgs.Add("enable-webgl");

Even same behavior observed with WinForms application also.

Can you guys please help me with this, am I missing any thing on configuration.

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Google Earth is using ShareArrayBuffer which can be enabled with an origin trial which it seems like cef does not support.

Here is the relevant exception from the DevTools log:

[0925/090023.156:INFO:CONSOLE(1)] "Uncaught ReferenceError: SharedArrayBuffer is not defined", source: https://earth.google.com/static/9.146.0.2/earthwasm.js (1)

Chrome:

CefSharp:

See: https://developer.chrome.com/blog/enabling-shared-array-buffer/

However I was able to get it working by enabling the SharedArrayBuffer feature via command line argument:

settings.CefCommandLineArgs.Add("enable-features", "SharedArrayBuffer");

You might need to clear the cache folder.

See https://web.dev/cross-origin-isolation-guide/

CefSharp:

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@campersau: Amazing, thanks a lot. That worked like a charm. ✔✔

@amaitland: Thanks for pointing out in the right direction. 👍👍

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However I was able to get it working by enabling the SharedArrayBuffer feature via command line argument:

This suggestion should come with a security disclaimer.

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Background information:
I have created a discussion ticket last time on enabling geo-location in cefsharp (even with fixed longitude and latitude), @amaitland suggested to use emualtion.

Tried setting fixed values, but getting same issue.
Browser.GetDevToolsClient().Emulation.SetGeolocationOverrideAsync(37.2968617,-121.81741295,50);

@campersau : Do you have any suggestion on this on how to enable ?
#3719

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Hi @campersau:
i was going through few articles regarding ShareArrayBuffer is prone to "Spectre and Meltdown" attacks, and need to enable CORP.
https://developer.chrome.com/blog/enabling-shared-array-buffer/
https://web.dev/cross-origin-isolation-guide/

I am using below args, please let me know if that solve the problem of security.

//Isolates the browsing context exclusively to same-origin documents. Cross-origin documents are not loaded in the same browsing context.
settings.CefCommandLineArgs.Add("cross-origin-resource-policy", "same-site");
//A document can only load resources from the same origin, or resources explicitly marked as loadable from another origin
settings.CefCommandLineArgs.Add("cross-origin-opener-policy", "same-origin");
settings.CefCommandLineArgs.Add("cross-origin-embedder-policy", "require-corp");
settings.CefCommandLineArgs.Add("enable-features", "SharedArrayBuffer");

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Converted from issue

This discussion was converted from issue #3825 on September 24, 2021 19:05.

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