Once a download is deemed "allowable" by CanDownload , the OnBeforeDownload method is triggered. This is where you typically specify the file path or show a "Save As" dialog. CefSharp/CefSharp/Handler/IDownloadHandler.cs at master
Return false to immediately terminate the request before any data is transferred. cefsharp cancel download
Blocking downloads based on the URL or request method (GET/POST). Once a download is deemed "allowable" by CanDownload
The most efficient way to block a download is at the CanDownload stage. This method is called in response to user actions like clicking a link that returns a Content-Disposition: attachment header. Blocking downloads based on the URL or request
In CefSharp, controlling file downloads is a critical task for developers who need to restrict certain file types, manage user permissions, or build custom download managers. To , you primarily interact with the IDownloadHandler interface at three different stages: before it starts, during the initialization, or while it is in progress. Method 1: Prevent Downloads Before They Start (CanDownload)
public bool CanDownload(IWebBrowser chromiumWebBrowser, IBrowser browser, string url, string requestMethod) { // Check if the URL is from a restricted domain if (url.Contains("untrusted-source.com")) { return false; // Cancels the download immediately } return true; // Proceed to OnBeforeDownload } Use code with caution.