CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

CefProcessId source_process,

CefRefPtr<CefProcessMessage> message)

{

// Return true if message was handled.

if (source_process != PID_RENDERER) {

return false;

}

const std::string& messageName = message->GetName();

std::string logMessage = "[Browser process] OnProcessMessageReceived(): ";

logMessage.append(messageName.c_str());

LOG(INFO) << logMessage.c_str();

if (messageName == "OnContextCreated") {

CefRefPtr<CefListValue> arguments = message->GetArgumentList();

if (arguments->GetSize() == 1 && arguments->GetType(0) == VTYPE_STRING) {

if (!frame.get()) {

// Frame was already destroyed while IPC messaging was

// executing. Issue #431. User callback will not be

// executed in such case.

return true;

}

V8ContextHandler_OnContextCreated(browser, frame);

return true;

} else {

LOG(ERROR) << "[Browser process] OnProcessMessageReceived():"

" invalid arguments, messageName=OnContextCreated";

return false;

}

} else if (messageName == "OnContextReleased") {

CefRefPtr<CefListValue> arguments = message->GetArgumentList();

if (arguments->GetSize() == 2 \

&& arguments->GetType(0) == VTYPE_INT \

&& arguments->GetType(1) == VTYPE_STRING) {

int browserId = arguments->GetInt(0);

CefString frameId = arguments->GetString(1);

// Even if frame was alrady destroyed (Issue #431) you still

// want to call V8ContextHandler_OnContextReleased as it releases

// some resources. Thus passing IDs instead of actual

// objects. Cython code in V8ContextHandler_OnContextReleased

// will handle a case when frame is already destroyed.

V8ContextHandler_OnContextReleased(browserId, frameId);

return true;

} else {

LOG(ERROR) << "[Browser process] OnProcessMessageReceived():"

" invalid arguments, messageName=OnContextReleased";

return false;

}

} else if (messageName == "V8FunctionHandler::Execute") {

CefRefPtr<CefListValue> arguments = message->GetArgumentList();

if (arguments->GetSize() == 3

// frameId

&& arguments->GetType(0) == VTYPE_STRING

// functionName

&& arguments->GetType(1) == VTYPE_STRING

// functionArguments

&& arguments->GetType(2) == VTYPE_LIST) {

CefString frameId = arguments->GetString(0);

CefString functionName = arguments->GetString(1);

CefRefPtr<CefListValue> functionArguments = arguments->GetList(2);

// Even if frame was already destroyed (Issue #431) you still

// want to call V8FunctionHandler_Execute, as it can run

// Python code without issues and doesn't require an actual

// frame. Thus passing IDs instead of actual objects. Cython

// code in V8FunctionHandler_Execute will handle a case when

// frame is already destroyed.

V8FunctionHandler_Execute(browser, frameId, functionName,

functionArguments);

return true;

} else {

LOG(ERROR) << "[Browser process] OnProcessMessageReceived():"

" invalid arguments,"

" messageName=V8FunctionHandler::Execute";

return false;

}

} else if (messageName == "ExecutePythonCallback") {

CefRefPtr<CefListValue> arguments = message->GetArgumentList();

if (arguments->GetSize() == 2

&& arguments->GetType(0) == VTYPE_INT // callbackId

&& arguments->GetType(1) == VTYPE_LIST) { // functionArguments

int callbackId = arguments->GetInt(0);

CefRefPtr<CefListValue> functionArguments = arguments->GetList(1);

ExecutePythonCallback(browser, callbackId, functionArguments);

return true;

} else {

LOG(ERROR) << "[Browser process] OnProcessMessageReceived():"

" invalid arguments,"

" messageName=ExecutePythonCallback";

return false;

}

}

return false;