CEF Forum

I want to use CEF to build a very basic Webviewer that should be able to load and display webpages.
The low level network access however is very specific. Because of sandbox restrictions this Webviewer cannot open his own TCP/UDP-sockets but gets them handed by a network blackbox. Whenever the user opens a new URL the Webviewer has to ask this network blackbox for permissions and then gets the necessary sockets handed to him. The open sockets get sent via a unix domain socket.

Q:
In which files of the CEF repository can I find the low-level-network stuff? I haven't found anything in the libcef/browser/net folder.
Q:
Is there a way to overwrite the default network access functions without compromising high-level functions like LoadURL()? I still want to be able to use the "normal" request functions, but only with my custom functions underneath?

Environment:
Fedora 25

Thanks for all your help! Sorry if the questions are trivial, I'm new to the project

You would need to implement this functionality in Chromium (src/net code). I suggest you start by downloading/building Chromium from source code and reviewing the code in that directory. If you have any specific questions you can ask on Chromium's net-dev mailing list.

What about implementing a scheme handler? You can register for http and HTTPS, intercepting every request, make your custom requests and populate the response stream when your done.

You can control requests by implementing CefRequestHandler::GetResourceHandler. Use CefURLRequest/CefURLRequestClient to perform the requests.

After some fiddling with a custom scheme handler I wonder if CEF provides any callbacks to hook into the socket setup process of chromium?
Are there any callbacks you can register to that are called when CEF opens a socket?

IMHO, modifying the Chromium source code seems a bit overkill for such a task.

ben wrote:After some fiddling with a custom scheme handler I wonder if CEF provides any callbacks to hook into the socket setup process of chromium?
Are there any callbacks you can register to that are called when CEF opens a socket?

IMHO, modifying the Chromium source code seems a bit overkill for such a task.

No such callbacks exist.