Google Plugin Support #4937
Replies: 6 comments 6 replies
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It means that with the alloy runtime gone there is no longer the extension loading support. Alloy style does not support it but chrome style does work with extensions and as of 126 there is a devtools load extension call that is pretty sexy: https://chromedevtools.github.io/devtools-protocol/tot/Extensions/#method-loadUnpacked It should have much better extension support now. |
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Loading Example of switch to using Only supported in
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and if you want to do it programmatically there is |
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Thanks to both of you for your replies, @amaitland @mitchcapper I have successfully opened the extension page.
But an exception is thrown when this extension is loaded, as shown in the figure below:
I attempted to add settings.CefCommandLineArgs.Add("enable-experimental-extension-apis", "1"); in CefSettings, but unfortunately, it didn’t have the desired effect. Are there any additional parameters that need to be configured, or other potential solutions to this issue? I would appreciate your insights. Thank you! |
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OK so the following are required: Now it may be you still get that error. I did also try to set the entire raw preference blob in a var json = @"{
""oejmofjkmijelromghaoncbbecjiial"": {
""active_permissions"": {
""api"": [
""storage""
],
""explicit_host"": [],
""manifest_permissions"": [],
""scriptable_host"": [
""file:///*"",
""http://*/*"",
""https://*/*""
]
},
""commands"": {},
""content_settings"": [],
""creation_flags"": 38,
""events"": [],
""first_install_time"": ""13372343007931350"",
""from_webstore"": false,
""granted_permissions"": {
""api"": [
""storage""
],
""explicit_host"": [],
""manifest_permissions"": [],
""scriptable_host"": [
""file:///*"",
""http://*/*"",
""https://*/*""
]
},
""incognito_content_settings"": [],
""incognito_preferences"": {},
""last_update_time"": ""13372343007931350"",
""location"": 4,
""newAllowFileAccess"": true,
""path"": ""F:\\my\\extension"",
""preferences"": {},
""regular_only_preferences"": {},
""state"": 1,
""was_installed_by_default"": false,
""was_installed_by_oem"": false,
""withholding_permissions"": false
}
}";
var jObj = JsonSerializer.Deserialize<Dictionary<string, object>>(json);
context.SetPreference("extensions.settings", jStr, out var errSet);It does give an args error but I haven't had time to track down if that is a CEF issue, a CEFSharp thing, or just totally not allowed by chrome. I did try to set the extension id directly but get key now found in those cases. At first I thought CEFSharp wasn't recursively serializing the dictionaries but looking at the code I don't think that is it. I really need to modify the prefs.html cefclient test to take a dictionary and see if that also errors. I haven't found a way to test devtools protocol with the cefclient to see about the loadExtension call. path = char.ToUpper(path[0]) + path.Substring(1);
var bytes = Encoding.Unicode.GetBytes(path);
using var hash = SHA256.Create();
var hashed_bytes = hash.ComputeHash(bytes);
var hexDigits = "abcdefghijklmnop".ToCharArray();
var extID = String.Join("",hashed_bytes.Take(16).Select(b=> $"{hexDigits[b >> 4]}{hexDigits[b & 0xF]}")); |
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OK! so not quite working in cefsharp but confirmed it works with the preference setting in cefclient to synthetically load an extension without other commands. Granted cefclient must be restarted and seems to crash for the first close but it is added. More things to debug:) In terms of CEFSharp I have learned to avoid microsofts json solution like the plague did not expect it to serialize json to a string/object dictionary so oddly. CEFSharp is still doing some awkward things with complex serialization objects that I need to debug as at greater depths it does literal 'key' 'value' sets. Expando should be fine going to the dictionary but something is screwed up. Just doing a call to get preference / set preference like: var curExtSettings = (Dictionary<string,object>) context.GetPreference("extensions.settings");
context.SetPreference("extensions.settings", curExtSettings, out errSet);results in the prefs store being corrupted to (oddly chrome even stores this to disk): {
"owoawenfoawenfoanwefonwaefe": [
{
"Key": "active_permissions",
"Value": [
{
"Key": "api",
"Value": [
"management",
"system.display",
"system.storage",
"webstorePrivate",
"system.cpu",
"system.memory",
"system.network"
]
},
{
"Key": "explicit_host",
"Value": [
]
},
{
"Key": "manifest_permissions",
"Value": [
]
},
{
"Key": "scriptable_host",
"Value": [
]
}
]A temporary fix as simple as converting it to a literal dictionary<string,object> recursively would probably work but I can probably get the CEFSharp serializer to handle it better. |
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Ok somewhat obvious the crash on exit was due to it trying to cleanup the extension and use its lock which doesnt exist as it wasnt properly loaded: It actually does a null check for the lock but only as a debug assert not to avoid trying it. This might mean that setting the preference in protected override void OnRequestContextInitialized(IRequestContext requestContext)
{
var curExtSettings = (Dictionary<string,object>) requestContext.GetPreference("extensions.settings");
curExtSettings["asdfasdfasdfasdf"] = Newtonsoft.Json.JsonConvert.DeserializeObject<IDictionary<string, object>>(extJson);
if (! requestContext.SetPreference("extensions.settings",curExtSettings, out var err))
throw new System.Exception(err);
base.OnRequestContextInitialized(requestContext);
}might just work to get it to load on first run. I tried some initial testing but not quite yet. |
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When I use the Newtonsoft.Json.JsonConvert.DeserializeObject<IDictionary<string, object>>(extJson) to convert my string into a setting object it doesn't work properly. In fact it work only for first level and not deep object : Example in the preference files after set it : Can you help me ? |
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Ok, data are correct if I use this typing But the extension is still not activated ... |
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I'm trying to add a plugin extension too and I follow your discussion to help me. Where I neet to call the method LoadUnpackExtensionAsync reference above ? Actually when I call it after loading an url, I got an error : "DevTools Client Error :Method not available." Even after add : And Can you explain me the best way to add and activate an extension in CefSharp without user interaction ? Link to the extension => https://chromewebstore.google.com/detail/ia4chrome/jifbnihciifbfeiiijegkfnbigagacjk Thanks ! |
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You shouldn't need to explicitly be setting it as an expando object although master should handle the serialization of them now correctly over just the string/object dictionaries. I didn't get the load unsafe extensions / devtools call to work (got that "Method not available") but per above I was able to throw the entire extension blob in there and get it to load a never before loaded extension without user interaction. That only caveat being it caused a crash on first close as clearly it isn't meant to be loaded that way. Now one could silently catch that first crash and afterwards it seems to behave perfectly. Granted this was several CEF versions ago so things could be better now. To test id recommend capturing the settings json, manually adding an extension, then capturing it again and getting the diff. Next clear the session out startup get the extensions.settings pref, set the key, put it back and see if it is there under extensions. Assuming it does continue working back to template it would for generating the ID and such to figure out where you are failing. |
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Thank you very much for your response ! I don't understand where/how to implement your example to work on the first time Any tips ? |
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In earlier versions of CefSharp, there was an IExtensionHandler for extending Chrome extensions. In the new version, IExtensionHandler has been removed. Does this mean that extension support is no longer available, or is there a new method for this? Please let me know, thank you.
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