V55 unable to access internet through proxy

[arvindlloyds]

I updated to CefSharp 55.0.0. After update I am not able to access internet. All intranet applications are opening fine.

I am behind configured proxy.

if I revert back to 51.0.0 it works. I am using - CefSharp.MinimalExample.Wpf to run my tests.

Here are the details -

What version of the product are you using?
55.0.0

What version are you using? Nuget? CI Nuget? build from a branch? If so which branch? Nuget:
55.0.0 and 53.0.0 (works)

What architecture x86 or x64?
x64

On what operating system?
Win7

Are you using WinForms, WPF or OffScreen?
WPF

What steps will reproduce the problem?
I use CefSharp.MinimalExample.Wpf from CefSharp. test it against 55.0.0 and 51.0.0

What is the expected output? What do you see instead? I must be able to internet in both the cases (55 and 53) but I see timeout when I use 55.0.0.

Not opening an issue (https://github.com/cefsharp/CefSharp/issues) before knowing if it can be resolved using a bit of tweak.

Last Bit -

I also have tried -

var proxy = ProxyConfig.GetProxyInformation();
switch (proxy.AccessType)
{
case InternetOpenType.Direct:
{
//Don't use a proxy server, always make direct connections.
settings.CefCommandLineArgs.Add("no-proxy-server", "1");
break;
}
case InternetOpenType.Proxy:
{
settings.CefCommandLineArgs.Add("proxy-server", proxy.ProxyAddress);
break;
}
case InternetOpenType.PreConfig:
{
settings.CefCommandLineArgs.Add("proxy-auto-detect", "1");
break;
}
}
Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);
Cef.Initialize(settings, true, true);

[amaitland]

How do I investigate my issue further?

It's important to remember that CefSharp is just a wrapper around the Chromium Embedded Project (CEF), the upstream CEF forum is a valuable resource. Also CEF has it's own Issue Tracker. Please take the time to research your own problem, including Googling, searching on ceforum, etc.

--

Finding more info

• Have you checked the Debug.log file? (Should be located in your apps executing folder by default)
• Have you googled the error message your seeing? (Don't just google the whole thing, try googling just the keywords and possibly add chromium as a keyword).
• Are you able to reproduce the problem using cefclient? (cefclient is the reference implementation provided by CEF)
• Need more help debugging? Check the Troubleshooting Guide
• Are you using the latest version? Check the Release Branches table to determine if the version your using is supported.

--

How do I download cefclient?

• Firstly identity which version of CEF your actually using, easiest way is to check your packages.config file, look for the cef.redist.x86 package, it's version will be something like 3.2526.1362, that's the exact version of CEF you'll need to download for comparison. You can also open chrome://version in the browser to determine the version.
• Open http://opensource.spotify.com/cefbuilds/index.html (http://cefbuilds.com for older version) in a web browser
• Locate the exact Branch you require, for the example above the branch is 2526, all the versions follow a similar pattern
• Locate the Windows 32bit or Windows 64bit item, if you don't see the exact version, then click more revisions
• Download Test App
• Are you using WPF/Offscreen or WinForms?

This next part is key

• To compare with WPF/OffScreen run cefclient --multi-threaded-message-loop --off-screen-rendering-enabled
• To compare with WinForms cefclient --multi-threaded-message-loop

[amaitland]

Possibly https://bitbucket.org/chromiumembedded/cef/issues/2066/branch-2883-pac-proxy-not-work

If so you'll have to skip using 55

[peters]

I can confirm that there's definitely a bug with PAC script loading in 55 :)

[amaitland]

master has been upgraded to CEF 3.2987.1597.gffc5773 reports suggest this has been resolved. If there's still a problem then discuss at https://bitbucket.org/chromiumembedded/cef/issues/2066/branch-2883-pac-proxy-not-work

[nikhilagrawaldotnet]

I had exact problem with v55. Intranet sites worked fine. Non-intranet sites used to work when Fiddler was running in parallel. As mentioned by amaitland comment above that this is fixed, we used 57.0.0-pre01 and this is fixed in that.

[arvindlloyds]

Fixed in 57.0.0