[🐛 Bug]: A command response was not received: Network.getResponseBody C#

What happened?

Hello, I am constantly getting an error when I try to get the response body.

One or more errors occurred. (A command response was not received: Network.getResponseBody)

StackTrace:

  at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at System.Threading.Tasks.Task`1.get_Result()
   at ConsoleApp3.Program.<>c__DisplayClass0_0.<Main>g__RequestWillBeSentHandler|0(Object sender, RequestWillBeSentEventArgs e) in C:\Users\ABC\source\repos\ConsoleApp3\ConsoleApp3\Program.cs:line 34

How can we reproduce the issue?

static async Task Main(string[] args)
        {
            var options = new ChromeOptions();

            var driver = new ChromeDriver(ChromeDriverService.CreateDefaultService(), options, TimeSpan.FromMinutes(2));

            var devTools = (IDevTools)driver;
            var session = devTools.GetDevToolsSession();
            var domains = session.GetVersionSpecificDomains<DevToolsSessionDomains>();

            void RequestWillBeSentHandler(object sender, RequestWillBeSentEventArgs e)
            {
                if (e.Request.Url.Contains("google.com"))
                {
                    try
                    {
                        var getResponseBody = domains.Network.GetResponseBody(new GetResponseBodyCommandSettings()
                        {
                            RequestId = e.RequestId
                        });

                        var body = getResponseBody.Result.Body;
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex);
                    }
                }
            }

            domains.Network.RequestWillBeSent += RequestWillBeSentHandler;
            await domains.Network.Enable(new EnableCommandSettings());

            driver.Navigate().GoToUrl("https://www.google.com/");

            driver.Quit();
        }

Relevant log output

Starting ChromeDriver 96.0.4664.45 (76e4c1bb2ab4671b8beba3444e61c0f17584b2fc-refs/branch-heads/4664@{#947}) on port 55559
Only local connections are allowed.
Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
ChromeDriver was started successfully.

DevTools listening on ws://127.0.0.1:55562/devtools/browser/7a626fcd-3684-445b-9b6f-ebdb992b3712
[29984:27600:1214/114346.774:ERROR:chrome_browser_main_extra_parts_metrics.cc(226)] crbug.com/1216328: Checking Bluetooth availability started. Please report if there is no report that this ends.
[29984:27600:1214/114346.774:ERROR:chrome_browser_main_extra_parts_metrics.cc(229)] crbug.com/1216328: Checking Bluetooth availability ended.
[29984:27600:1214/114346.774:ERROR:chrome_browser_main_extra_parts_metrics.cc(232)] crbug.com/1216328: Checking default browser status started. Please report if there is no report that this ends.
[29984:27600:1214/114346.780:ERROR:chrome_browser_main_extra_parts_metrics.cc(236)] crbug.com/1216328: Checking default browser status ended.
System.AggregateException: One or more errors occurred. (A command response was not received: Network.getResponseBody)
 ---> System.InvalidOperationException: A command response was not received: Network.getResponseBody
   at OpenQA.Selenium.DevTools.DevToolsSession.SendCommand(String commandName, JToken commandParameters, CancellationToken cancellationToken, Nullable`1 millisecondsTimeout, Boolean throwExceptionIfResponseNotReceived)
   at OpenQA.Selenium.DevTools.DevToolsSession.SendCommand[TCommand,TCommandResponse](TCommand command, CancellationToken cancellationToken, Nullable`1 millisecondsTimeout, Boolean throwExceptionIfResponseNotReceived)
   at OpenQA.Selenium.DevTools.V96.Network.NetworkAdapter.GetResponseBody(GetResponseBodyCommandSettings command, CancellationToken cancellationToken, Nullable`1 millisecondsTimeout, Boolean throwExceptionIfResponseNotReceived)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at System.Threading.Tasks.Task`1.get_Result()
   at ConsoleApp3.Program.<>c__DisplayClass0_0.<Main>g__RequestWillBeSentHandler|0(Object sender, RequestWillBeSentEventArgs e) in C:\Users\ABC\source\repos\ConsoleApp3\ConsoleApp3\Program.cs:line 34

C:\Users\ABC\source\repos\ConsoleApp3\ConsoleApp3\bin\Debug\net5.0\ConsoleApp3.exe (process 14516) exited with code 0.
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Operating System

Windows 10

Selenium version

Selenium 4.1, .Net Core 5 or .NET Framework 4.7.2(C# 8)

What are the browser(s) and version(s) where you see this issue?

Chrome 96

What are the browser driver(s) and version(s) where you see this issue?

ChromeDriver 96

Are you using Selenium Grid?

no

[amather]

I’m having the same issue, but running the CDP command directly works for me:

Dictionary<string, object> cdpParameters = new(){ { "requestId", e.RequestId} };
Dictionary<string, object> res = (Dictionary<string, object>) ((ChromeDriver)drv).ExecuteCdpCommand("Network.getResponseBody", cdpParameters);
 if (res.TryGetValue("body", out object? bodyObj))
 {
    string body = (string)bodyObj;
 }

[Dreamescaper]

@lopukhDA You’re trying to retrieve response body on RequestWillBeSent event, response body not available at this point, since there is no response itself so far. You should do that on LoadingFinished event.