/// <summary>
/// Called before browser navigation. Return true to cancel the navigation or
/// false to allow the navigation to proceed. The |request| object cannot be
/// modified in this callback.
/// </summary>
protected virtual bool OnBeforeNavigation(CefBrowser browser, CefFrame frame, CefRequest request, CefNavigationType navigation_type, bool isRedirect)
{
return(false);
}
/// <summary>
/// Create a new CefRequest object.
/// </summary>
public static CefRequest Create()
{
return(CefRequest.FromNative(
cef_request_t.create()
));
}
/// <summary> /// Begin processing the request. To handle the request return true and call /// CefCallback::Continue() once the response header information is available /// (CefCallback::Continue() can also be called from inside this method if /// header information is available immediately). To cancel the request return /// false. /// </summary> protected abstract bool ProcessRequest(CefRequest request, CefCallback callback);
/// <summary> /// Return a new resource handler instance to handle the request or an empty /// reference to allow default handling of the request. |browser| and |frame| /// will be the browser window and frame respectively that originated the /// request or NULL if the request did not originate from a browser window /// (for example, if the request came from CefURLRequest). The |request| object /// passed to this method will not contain cookie data. /// </summary> protected abstract CefResourceHandler Create(CefBrowser browser, CefFrame frame, string schemeName, CefRequest request);
/// <summary>
/// Returns the request object used to create this URL request. The returned
/// object is read-only and should not be modified.
/// </summary>
public CefRequest GetRequest()
{
return(CefRequest.FromNative(
cef_urlrequest_t.get_request(_self)
));
}
/// <summary>
/// Called on the IO thread when a resource load has completed. |request| and
/// |response| represent the request and response respectively and cannot be
/// modified in this callback. |status| indicates the load completion status.
/// |received_content_length| is the number of response bytes actually read.
/// </summary>
protected virtual void OnResourceLoadComplete(CefBrowser browser, CefFrame frame, CefRequest request, CefResponse response, CefUrlRequestStatus status, long receivedContentLength)
{
}
/// <summary>
/// Called on the UI thread before browser navigation. Return true to cancel
/// the navigation or false to allow the navigation to proceed. The |request|
/// object cannot be modified in this callback.
/// CefLoadHandler::OnLoadingStateChange will be called twice in all cases.
/// If the navigation is allowed CefLoadHandler::OnLoadStart and
/// CefLoadHandler::OnLoadEnd will be called. If the navigation is canceled
/// CefLoadHandler::OnLoadError will be called with an |errorCode| value of
/// ERR_ABORTED.
/// </summary>
protected virtual bool OnBeforeBrowse(CefBrowser browser, CefFrame frame, CefRequest request, bool isRedirect)
{
return(false);
}
/// <summary>
/// Called on the IO thread to optionally filter resource response content.
/// |request| and |response| represent the request and response respectively
/// and cannot be modified in this callback.
/// </summary>
protected virtual CefResponseFilter GetResourceResponseFilter(CefBrowser browser, CefFrame frame, CefRequest request, CefResponse response)
{
return(null);
}
/// <summary>
/// Called on the IO thread when a resource response is received. To allow the
/// resource to load normally return false. To redirect or retry the resource
/// modify |request| (url, headers or post body) and return true. The
/// |response| object cannot be modified in this callback.
/// </summary>
protected virtual bool OnResourceResponse(CefBrowser browser, CefFrame frame, CefRequest request, CefResponse response)
{
return(false);
}
/// <summary>
/// Called on the IO thread when a resource load is redirected. The |request|
/// parameter will contain the old URL and other request-related information.
/// The |new_url| parameter will contain the new URL and can be changed if
/// desired. The |request| object cannot be modified in this callback.
/// </summary>
protected virtual void OnResourceRedirect(CefBrowser browser, CefFrame frame, CefRequest request, ref string newUrl)
{
}
/// <summary>
/// Called on the IO thread before a resource is loaded. To allow the resource
/// to load normally return NULL. To specify a handler for the resource return
/// a CefResourceHandler object. The |request| object should not be modified in
/// this callback.
/// </summary>
protected virtual CefResourceHandler GetResourceHandler(CefBrowser browser, CefFrame frame, CefRequest request)
{
return(null);
}
/// <summary>
/// Called on the IO thread before a resource request is loaded. The |request|
/// object may be modified. Return RV_CONTINUE to continue the request
/// immediately. Return RV_CONTINUE_ASYNC and call CefRequestCallback::
/// Continue() at a later time to continue or cancel the request
/// asynchronously. Return RV_CANCEL to cancel the request immediately.
/// </summary>
protected virtual CefReturnValue OnBeforeResourceLoad(CefBrowser browser, CefFrame frame, CefRequest request, CefRequestCallback callback)
{
return(CefReturnValue.Continue);
}