C# unable to enable performance logging for ChromeDriver

[DiliTrustApplicant]

Chrome:Version 75.0.3770.100
ChromeDriver:75.0.3770.90
Selenium:3.141.0

I'm getting the error ```
OpenQA.Selenium.WebDriverException: 'invalid argument: entry 0 of 'firstMatch' is invalid
from invalid argument: perfLoggingPrefs specified, but performance logging was not enabled'

If the work around is to use LoggingPreference, can someone please tell me how to reference it since it does not seem to be in the 3.141.0 dll. Also, I think this might relate to the changes to 75.0.3770.8 Renamed capability loggingPrefs to goog:loggingPrefs, as required by W3C standard

public Driver(ChromeDriverModel chromeDriverModel)
        {
            ChromeOptions chromeOptions = new ChromeOptions();
            enablePerformanceMonitor = chromeDriverModel.enablePerformanceMonitoring;
            if (enablePerformanceMonitor)
                chromeOptions = _ChromePerformanceOptions();

            if (!string.IsNullOrWhiteSpace(chromeDriverModel.ChromeDriverLocation))
            {
                if (enablePerformanceMonitor)
                    _webDriver = new ChromeDriver(chromeDriverModel.ChromeDriverLocation, chromeOptions);
                else
                    _webDriver = new ChromeDriver(chromeDriverModel.ChromeDriverLocation);
            }
            else
            {
                if (enablePerformanceMonitor)
                    _webDriver = new ChromeDriver(chromeOptions);
                else
                    _webDriver = new ChromeDriver();
            }
        }


private ChromeOptions _ChromePerformanceOptions()
        {
            var option = new ChromeOptions();
            var perfLogPrefs = new ChromePerformanceLoggingPreferences();
            perfLogPrefs.AddTracingCategories(new string[] { "devtools.network", "devtools.timeline" });
            option.PerformanceLoggingPreferences = perfLogPrefs;
            option.AddAdditionalCapability(CapabilityType.EnableProfiling, true, true);
            option.SetLoggingPreference("performance", LogLevel.All);
            return option;
        }

Sorry if repost, not sure which is the official spot. 

[SlavikCA]

related to #7342 CapabilityType.LOGGING_PREFS is not valid for latest versions of Chrome (75+)

[MatthewSteeples]

Potential workaround code for C# (until the library is fixed). This will update the value of the preference string as long as it's run before you make use of the options

typeof(CapabilityType).GetField(nameof(CapabilityType.LoggingPreferences), BindingFlags.Static | BindingFlags.Public).SetValue(null, "goog:loggingPrefs");

[DiliTrustApplicant]

@MatthewSteeples Thanks Matt! That did allow the browser to start. What i'm not sure of now is if that fix is breaking the logs. Up top in my ChromePerformanceOptions object you can see I'm setting my log pref like so option.SetLoggingPreference("performance", LogLevel.All);. However, when I go to grab the logs it's telling me this object is null var logs = _driver._webDriver.Manage().Logs.GetLog("performance");

[MatthewSteeples]

We're getting the same when trying to retrieve browser logs so it would appear that this isn't a full fix yet. We'll be trying some more things tomorrow, but it may be a case of waiting for 4.0 alpha 2 to hit NuGet

[joelransom]

Trying to follow the conversations around this. I just hit this when my chrome updated to version 76. Are there no workarounds for accessing chrome logs?
Thanks.

[lmtierney]

With version 76, Chromedriver Issue 2947 was resolved changing the endpoint to /session/:sessionId/se/log (see change).

The selenium bindings will be updated accordingly, but you'll need to patch them yourself if you need them now; or use chromedriver 75.

[lmtierney]

Scratch that, I believe this should be hitting the correct endpoints for logs in 4.0.0-alpha02

[alex-jitbit]

4.0.0-alpha02 still does not work because #7390

[lmtierney]

It should work with chrome 76

[kjknepp]

@lmtierney
I've also been having this issue with chrome 76 and ChromeDriver 76.
I'm not up to date on all of the bugs and things but it is for sure not working with chrome 76

[kjknepp]

Sorry, re-read things a second time, were you saying to use the following?

Selenium.WebDriver: 4.0.0-alpha02
Chrome: 76.XXX
ChromeDriver: 76.XXX

because I just checked my selenium version and I'm using 3.141.0