browsers can set cef commandlineargs

CefSharp.OutOfProcess.BrowserProcess/Program.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
+using System.Linq;
 using System.Threading.Tasks;
 using CefSharp.Internals;
 
@@ -17,17 +19,17 @@ public static int Main(string[] args)
             //Debugger.Launch();
 
             var parentProcessId = int.Parse(CommandLineArgsParser.GetArgumentValue(args, "--parentProcessId"));
-            var cachePath = CommandLineArgsParser.GetArgumentValue(args, "--cachePath");
 
             var parentProcess = Process.GetProcessById(parentProcessId);
 
             var settings = new CefSettings()
             {
                 //By default CefSharp will use an in-memory cache, you need to specify a Cache Folder to persist data
-                CachePath = cachePath,
                 MultiThreadedMessageLoop = false
             };
 
+            AddArgs(settings, args);
+
             var browserProcessHandler = new BrowserProcessHandler(parentProcessId);
 
             Cef.EnableWaitForBrowsersToClose();
@@ -66,5 +68,32 @@ public static int Main(string[] args)
 
             return 0;
         }
+
+        private static void AddArgs(CefSettings settings, IEnumerable<string> args)
+        {
+            foreach (var arg in args)
+            {
+                List<string> splitted = arg.Split('=').ToList();
+                var key = splitted.First().Substring(2);
+                var value = splitted.Count == 1 ? string.Empty : splitted.Last();
+                AddArg(settings, key, value);
+            }
+        }
+
+        private static void AddArg(CefSettings settings, string key, string value)
+        {
+            switch (key)
+            {
+                case "accept-lang":
+                    settings.AcceptLanguageList = value;
+                    break;
+                case "cachePath":
+                    settings.CachePath = value;
+                    break;
+                default:
+                    settings.CefCommandLineArgs.Add(key, value);
+                    break;
+            }
+        }
     }
 }

CefSharp.OutOfProcess.Core/OutOfProcessHost.cs

@@ -1,11 +1,13 @@
-using CefSharp.OutOfProcess.Interface;
+using CefSharp.OutOfProcess.Interface;
 using CefSharp.OutOfProcess.Internal;
 using PInvoke;
 using StreamJsonRpc;
 using System;
 using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 
 namespace CefSharp.OutOfProcess
@@ -28,13 +30,15 @@ public class OutOfProcessHost : IOutOfProcessHostRpc, IDisposable
         private int _browserIdentifier = 1;
         private string _outofProcessHostExePath;
         private string _cachePath;
+        private readonly IEnumerable<string> _cefCommandLineArgs;
         private ConcurrentDictionary<int, IChromiumWebBrowserInternal> _browsers = new ConcurrentDictionary<int, IChromiumWebBrowserInternal>();
         private TaskCompletionSource<OutOfProcessHost> _processInitialized = new TaskCompletionSource<OutOfProcessHost>(TaskCreationOptions.RunContinuationsAsynchronously);
 
-        private OutOfProcessHost(string outOfProcessHostExePath, string cachePath = null)
+        private OutOfProcessHost(string outOfProcessHostExePath, string cachePath = null, IEnumerable<string> cefCommandLineArgs = null)
         {
             _outofProcessHostExePath = outOfProcessHostExePath;
             _cachePath = cachePath;
+            _cefCommandLineArgs = cefCommandLineArgs;
         }
 
         /// <summary>
@@ -108,7 +112,7 @@ private void Init()
         {
             var currentProcess = Process.GetCurrentProcess();
 
-            var args = $"--parentProcessId={currentProcess.Id} --cachePath={_cachePath}";
+            var args = $"--parentProcessId={currentProcess.Id} --cachePath={_cachePath} {_cefCommandLineArgs?.Aggregate((a, p) => $"{a} {p}")}";
 
             _browserProcess = Process.Start(new ProcessStartInfo(_outofProcessHostExePath, args)
             {
@@ -234,7 +238,7 @@ public void Dispose()
             _jsonRpc = null;
         }
 
-        public static Task<OutOfProcessHost> CreateAsync(string path = HostExeName, string cachePath = null)
+        public static Task<OutOfProcessHost> CreateAsync(string path = HostExeName, string cachePath = null, IEnumerable<string> cefCommandLineArgs = null)
         {
             if(string.IsNullOrEmpty(path))
             {
@@ -248,7 +252,7 @@ public static Task<OutOfProcessHost> CreateAsync(string path = HostExeName, stri
                 throw new FileNotFoundException("Unable to find Host executable.", path);
             }
 
-            var host = new OutOfProcessHost(fullPath, cachePath);
+            var host = new OutOfProcessHost(fullPath, cachePath, cefCommandLineArgs);
 
             host.Init();