静态文件下载

添加后缀 fd=1

http://localhost:5775/img.png?fi=1

 app.UseStaticFiles(new StaticFileOptions
                {
                    FileProvider = new PhysicalFileProvider(path),
                    RequestPath = rPath.ToString().Trim('~'),
                    OnPrepareResponse = (c) =>
                    {
                        c.Context.Response.Headers.Add("Access-Control-Allow-Origin", "*");
                        c.Context.Response.Headers.Add("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS, TRACE, HEAD, PATCH");
                        //c.Context.Response.Headers.Add("Access-Control-Allow-Credentials", "true");
                        c.Context.Response.Headers.Add("Access-Control-Allow-Headers", "*");
                        //静态文件下载 fd=1
                        var request = c.Context.Request;
                        var response = c.Context.Response;
                        if (request.Query.ContainsKey("fd"))
                        {
                            response.Headers.Add("Content-Disposition", "attachment; filename=" + Path.GetFileName(request.Path));
                        }
                    }
                }).