feature add download function for web and pc.

src/slic3r/GUI/DownloadManager.cpp

@@ -1,20 +1,75 @@
-#include "WCPDownloadManager.hpp"
+#include "DownloadManager.hpp"
 #include "GUI_App.hpp"
 #include <boost/filesystem.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/log/trivial.hpp>
+#include <vector>
 
 namespace Slic3r { namespace GUI {
 
-size_t DownloadManager::start_download(const std::string& file_url,
-                                         const std::string& file_name,
-                                         std::shared_ptr<SSWCP_Instance> wcp_instance) {
-
-    std::lock_guard<std::mutex> lock(m_tasks_mutex);
+// ============================================================================
+// WCP Download Interface (for Web-to-PC communication)
+// ============================================================================
+size_t DownloadManager::start_wcp_download(const std::string& file_url,
+                                             const std::string& file_name,
+                                             std::shared_ptr<SSWCP_Instance> wcp_instance,
+                                             bool use_original_event_id) {
     
+    std::lock_guard<std::mutex> lock(m_tasks_mutex);
     size_t task_id = m_next_task_id++;
     
-    // Get download path
+    auto downloadPath = wxGetApp().app_config->get("download_path");
+    boost::filesystem::path dest_folder(downloadPath);
+    boost::filesystem::create_directories(dest_folder);
+    boost::filesystem::path dest_file = dest_folder / file_name;
+    std::string dest_path = dest_file.string();
+    
+    auto task = std::make_shared<DownloadTask>(task_id, 
+                                                file_url, 
+                                                file_name, 
+                                                dest_path, 
+                                                wcp_instance,
+                                                use_original_event_id);
+
+    task->state = DownloadTaskState::Downloading;
+    
+    m_tasks[task_id] = task;
+    start_download_impl(task);
+    return task_id;
+}
+
+// ============================================================================
+// Internal Download Interface (for PC internal use)
+// ============================================================================
+size_t DownloadManager::start_internal_download(const std::string& file_url,
+                                                  const std::string& file_name,
+                                                  const std::string& dest_path,
+                                                  DownloadCallbacks callbacks) {
+    
+    std::lock_guard<std::mutex> lock(m_tasks_mutex);
+    size_t task_id = m_next_task_id++;
+    
+    boost::filesystem::path dest_file_path(dest_path);
+    boost::filesystem::create_directories(dest_file_path.parent_path());
+
+    auto task = std::make_shared<DownloadTask>(task_id, 
+                                                file_url, 
+                                                file_name, 
+                                                dest_path, 
+                                                std::move(callbacks));
+
+    task->state = DownloadTaskState::Downloading;
+    
+    m_tasks[task_id] = task;
+    start_download_impl(task);
+    
+    return task_id;
+}
+
+size_t DownloadManager::start_internal_download(const std::string& file_url,
+                                                 const std::string& file_name,
+                                                 DownloadCallbacks callbacks) {
+    // Get default download path
     auto downloadPath = wxGetApp().app_config->get("download_path");
     boost::filesystem::path dest_folder(downloadPath);
     boost::filesystem::create_directories(dest_folder);
@@ -22,26 +77,25 @@ size_t DownloadManager::start_download(const std::string& file_url,
     boost::filesystem::path dest_file = dest_folder / file_name;
     std::string dest_path = dest_file.string();
     
-    // Create task
-    auto task = std::make_shared<DownloadTask>(task_id, file_url, file_name, dest_path, wcp_instance);
-    task->state = SMDownloadState::Downloading;
+    return start_internal_download(file_url, file_name, dest_path, std::move(callbacks));
+}
+
+void DownloadManager::start_download_impl(std::shared_ptr<DownloadTask> task) {
     
-    m_tasks[task_id] = task;
-    
-    // Start download
     wxGetApp().CallAfter([this, task]() {
         try {
             // Step 1: Create Http object
             Http http = Http::get(task->file_url);
             
+            http.timeout_max(0);
+
             // Step 2: Set progress callback
             http.on_progress([this, task](Http::Progress progress, bool& cancel) {
-                if (task->state == SMDownloadState::Canceled) {
+                if (task->state == DownloadTaskState::Canceled) {
                     cancel = true;
                     return;
                 }
                 
-                // Calculate progress
                 int percent = 0;
                 if (progress.dltotal > 0) {
                     percent = (int)(progress.dlnow * 100 / progress.dltotal);
@@ -87,7 +141,7 @@ size_t DownloadManager::start_download(const std::string& file_url,
                         file.write(body.c_str(), body.size());
                         file.close();
                         
-                        task->state = SMDownloadState::Completed;
+                        task->state = DownloadTaskState::Completed;
                         task->percent = 100;
                         send_complete_update(task, task->dest_path);
                         cleanup_task(task->task_id);
@@ -101,7 +155,7 @@ size_t DownloadManager::start_download(const std::string& file_url,
             // Step 4: Set error callback
             http.on_error([this, task](std::string body, std::string error, unsigned status) {
                 wxGetApp().CallAfter([this, task, error, status]() {
-                    task->state = SMDownloadState::Error;
+                    task->state = DownloadTaskState::Error;
                     task->error_message = error;
                     send_error_update(task, error);
                     cleanup_task(task->task_id);
@@ -112,16 +166,15 @@ size_t DownloadManager::start_download(const std::string& file_url,
             task->http_object = http.perform();
             
         } catch (std::exception& e) {
-            task->state = SMDownloadState::Error;
+            task->state = DownloadTaskState::Error;
             task->error_message = e.what();
             send_error_update(task, e.what());
             cleanup_task(task->task_id);
         }
     });
-    
-    return task_id;
 }
 
+//this function not currently in use
 bool DownloadManager::cancel_download(size_t task_id) {
     std::shared_ptr<SSWCP_Instance> wcp_to_destroy;
     
@@ -134,23 +187,32 @@ bool DownloadManager::cancel_download(size_t task_id) {
         }
         
         auto task = it->second;
-        if (task->state == SMDownloadState::Downloading) {
-            task->state = SMDownloadState::Canceled;
+        if (task->state == DownloadTaskState::Downloading) {
+            task->state = DownloadTaskState::Canceled;
             if (task->http_object) {
                 task->http_object->cancel();
             }
             
-            // Get WCP instance before cleanup (for destruction after lock release)
-            wcp_to_destroy = task->wcp_instance.lock();
+            // Only for WCP downloads
+            if (task->is_wcp_download()) {
+                wcp_to_destroy = task->wcp_instance.lock();
+            } else {
+                // For internal downloads, call error callback if available
+                if (task->callbacks.on_error) {
+                    wxGetApp().CallAfter([task]() {
+                        if (task->callbacks.on_error) {
+                            task->callbacks.on_error(task->task_id, "Download canceled");
+                        }
+                    });
+                }
+            }
             
             cleanup_task(task_id);
         } else {
             return false;
         }
     }
-    
-    // Destroy WCP instance outside the lock to prevent deadlock
-    // This is the WCP instance from the original download request (sw_DownloadFile)
+
     if (wcp_to_destroy) {
         wcp_to_destroy->finish_job();
     }
@@ -158,40 +220,38 @@ bool DownloadManager::cancel_download(size_t task_id) {
     return true;
 }
 
+// this function not currently in use
 bool DownloadManager::pause_download(size_t task_id) {
-    // Pause functionality can be implemented if needed
-    // Current Http module may not support pause, need to implement resume from breakpoint
     std::lock_guard<std::mutex> lock(m_tasks_mutex);
     auto it = m_tasks.find(task_id);
-    if (it != m_tasks.end() && it->second->state == SMDownloadState::Downloading) {
-        it->second->state = SMDownloadState::Paused;
-        // Note: Http module doesn't support pause directly, would need breakpoint resume
+    if (it != m_tasks.end() && it->second->state == DownloadTaskState::Downloading) {
+        it->second->state = DownloadTaskState::Paused;        
         return true;
     }
     return false;
 }
 
+// this function not currently in use
 bool DownloadManager::resume_download(size_t task_id) {
-    // Resume functionality can be implemented if needed
-    // Would require breakpoint resume support in Http module
     std::lock_guard<std::mutex> lock(m_tasks_mutex);
     auto it = m_tasks.find(task_id);
-    if (it != m_tasks.end() && it->second->state == SMDownloadState::Paused) {
-        // Would need to restart download with range header
-        return false;  // Not implemented yet
+    if (it != m_tasks.end() && it->second->state == DownloadTaskState::Paused) {
+        return false; 
     }
     return false;
 }
 
-SMDownloadState DownloadManager::get_task_state(size_t task_id) {
+// this function not currently in use
+DownloadTaskState DownloadManager::get_task_state(size_t task_id) {
     std::lock_guard<std::mutex> lock(m_tasks_mutex);
     auto it = m_tasks.find(task_id);
     if (it != m_tasks.end()) {
         return it->second->state;
     }
-    return SMDownloadState::Error;
+    return DownloadTaskState::Error;
 }
 
+// this function not currently in use
 std::shared_ptr<DownloadTask> DownloadManager::get_task(size_t task_id) {
     std::lock_guard<std::mutex> lock(m_tasks_mutex);
     auto it = m_tasks.find(task_id);
@@ -201,10 +261,39 @@ std::shared_ptr<DownloadTask> DownloadManager::get_task(size_t task_id) {
     return nullptr;
 }
 
+// this function not currently in use
+std::vector<std::shared_ptr<DownloadTask>> DownloadManager::get_all_tasks() {
+    std::lock_guard<std::mutex> lock(m_tasks_mutex);
+    std::vector<std::shared_ptr<DownloadTask>> result;
+    result.reserve(m_tasks.size());
+    for (const auto& pair : m_tasks) {
+        result.push_back(pair.second);
+    }
+    return result;
+}
+
+// ============================================================================
+// Progress/Complete/Error Update Handlers
+// ============================================================================
 void DownloadManager::send_progress_update(std::shared_ptr<DownloadTask> task, 
                                                int percent, 
                                                size_t downloaded, 
                                                size_t total) {
+    if (task->is_wcp_download()) {
+        send_wcp_progress_update(task, percent, downloaded, total);
+    } else {
+        call_internal_progress_callback(task, percent, downloaded, total);
+    }
+}
+
+void DownloadManager::send_wcp_progress_update(std::shared_ptr<DownloadTask> task, 
+                                                  int percent, 
+                                                  size_t downloaded, 
+                                                  size_t total) {    
+    if (!task->use_original_event_id) {
+        return;
+    }
+    
     if (auto wcp = task->wcp_instance.lock()) {
         json progress_data;
         progress_data["task_id"] = task->task_id;
@@ -216,10 +305,14 @@ void DownloadManager::send_progress_update(std::shared_ptr<DownloadTask> task,
         wcp->m_res_data = progress_data;
         wcp->m_status = 0;
         wcp->m_msg = "Download progress";
-        
-        // Use progress event ID
+                
         json header;
-        header["event_id"] = wcp->m_event_id + "_progress";
+        if (task->use_original_event_id) {
+            header["event_id"] = wcp->m_event_id;
+        } else {
+            header["event_id"] = wcp->m_event_id + "_progress";
+        }
+
         header["command"] = "download_progress";
         wcp->m_header = header;
         
@@ -227,8 +320,31 @@ void DownloadManager::send_progress_update(std::shared_ptr<DownloadTask> task,
     }
 }
 
+void DownloadManager::call_internal_progress_callback(std::shared_ptr<DownloadTask> task,
+                                                      int percent,
+                                                      size_t downloaded,
+                                                      size_t total) {    
+    if (task->callbacks.on_progress) {
+        task->callbacks.on_progress(task->task_id, percent, downloaded, total);
+    }
+}
+
 void DownloadManager::send_complete_update(std::shared_ptr<DownloadTask> task, 
                                                const std::string& file_path) {
+    if (task->is_wcp_download()) {
+        send_wcp_complete_update(task, file_path);
+    } else {
+        call_internal_complete_callback(task, file_path);
+    }
+}
+
+void DownloadManager::send_wcp_complete_update(std::shared_ptr<DownloadTask> task, 
+                                                 const std::string& file_path) {
+    
+    if (!task->use_original_event_id) {
+        return;
+    }
+
     if (auto wcp = task->wcp_instance.lock()) {
         json complete_data;
         complete_data["task_id"] = task->task_id;
@@ -240,15 +356,35 @@ void DownloadManager::send_complete_update(std::shared_ptr<DownloadTask> task,
         wcp->m_res_data = complete_data;
         wcp->m_status = 0;
         wcp->m_msg = "Download completed";
-        wcp->send_to_js();
         
-        // Release WCP instance to prevent memory leak
+        wcp->send_to_js();
         wcp->finish_job();
     }
 }
 
+void DownloadManager::call_internal_complete_callback(std::shared_ptr<DownloadTask> task,
+                                                       const std::string& file_path) {
+    if (task->callbacks.on_complete) {
+        task->callbacks.on_complete(task->task_id, file_path);
+    }
+}
+
 void DownloadManager::send_error_update(std::shared_ptr<DownloadTask> task, 
                                            const std::string& error) {
+    if (task->is_wcp_download()) {
+        send_wcp_error_update(task, error);
+    } else {
+        call_internal_error_callback(task, error);
+    }
+}
+
+void DownloadManager::send_wcp_error_update(std::shared_ptr<DownloadTask> task, 
+                                              const std::string& error) {
+    
+    if (!task->use_original_event_id) {
+        return;
+    }
+    
     if (auto wcp = task->wcp_instance.lock()) {
         json error_data;
         error_data["task_id"] = task->task_id;
@@ -258,13 +394,19 @@ void DownloadManager::send_error_update(std::shared_ptr<DownloadTask> task,
         wcp->m_res_data = error_data;
         wcp->m_status = -1;
         wcp->m_msg = error;
+
         wcp->send_to_js();
-        
-        // Release WCP instance to prevent memory leak
         wcp->finish_job();
     }
 }
 
+void DownloadManager::call_internal_error_callback(std::shared_ptr<DownloadTask> task,
+                                                    const std::string& error) {
+    if (task->callbacks.on_error) {
+        task->callbacks.on_error(task->task_id, error);
+    }
+}
+
 void DownloadManager::cleanup_task(size_t task_id) {
     std::lock_guard<std::mutex> lock(m_tasks_mutex);
     m_tasks.erase(task_id);

src/slic3r/GUI/DownloadManager.hpp

@@ -1,5 +1,5 @@
-#ifndef slic3r_WCPDownloadManager_hpp_
-#define slic3r_WCPDownloadManager_hpp_
+#ifndef slic3r_DownloadManager_hpp_
+#define slic3r_DownloadManager_hpp_
 
 #include <memory>
 #include <string>
@@ -7,6 +7,7 @@
 #include <mutex>
 #include <atomic>
 #include <chrono>
+#include <functional>
 #include "../Utils/Http.hpp"
 #include "SSWCP.hpp"
 #include <boost/filesystem/path.hpp>
@@ -14,8 +15,8 @@
 
 namespace Slic3r { namespace GUI {
 
-// Download task state
-enum class SMDownloadState {
+// Download task state (renamed to avoid conflict with Downloader::DownloadState)
+enum class DownloadTaskState {
     Pending,
     Downloading,
     Paused,
@@ -24,25 +25,66 @@ enum class SMDownloadState {
     Canceled
 };
 
+// Download callback interface for internal downloads
+struct DownloadCallbacks {
+    std::function<void(size_t task_id, int percent, size_t downloaded, size_t total)> on_progress;
+    std::function<void(size_t task_id, const std::string& file_path)> on_complete;
+    std::function<void(size_t task_id, const std::string& error)> on_error;
+    
+    DownloadCallbacks() = default;
+    DownloadCallbacks(
+        std::function<void(size_t, int, size_t, size_t)> progress,
+        std::function<void(size_t, const std::string&)> complete,
+        std::function<void(size_t, const std::string&)> error)
+        : on_progress(std::move(progress))
+        , on_complete(std::move(complete))
+        , on_error(std::move(error))
+    {}
+};
+
 // Download task information
 struct DownloadTask {
     size_t task_id;
     std::string file_url;
     std::string file_name;
     std::string dest_path;
-    std::weak_ptr<SSWCP_Instance> wcp_instance;  // Associated WCP instance
-    Http::Ptr http_object;  // HTTP object for cancellation
-    SMDownloadState state;
+    
+    std::weak_ptr<SSWCP_Instance> wcp_instance;
+    
+    DownloadCallbacks callbacks;
+    
+    Http::Ptr http_object;  
+    DownloadTaskState state;
     int percent;
     std::string error_message;
     
+    bool auto_finish_job;
+    bool use_original_event_id;
+    
+    // Constructor for WCP downloads
     DownloadTask(size_t id, const std::string& url, const std::string& name, 
-                   const std::string& path, std::shared_ptr<SSWCP_Instance> instance)
-        : task_id(id), file_url(url), file_name(name), dest_path(path), wcp_instance(instance), state(SMDownloadState::Pending), percent(0)
+                 const std::string& path, std::shared_ptr<SSWCP_Instance> instance,
+                 bool use_original_event = false)
+        : task_id(id), file_url(url), file_name(name), dest_path(path)
+        , wcp_instance(instance), state(DownloadTaskState::Pending), percent(0)
+        , auto_finish_job(false), use_original_event_id(use_original_event)
     {}
+    
+    // Constructor for internal downloads
+    DownloadTask(size_t id, const std::string& url, const std::string& name, 
+                 const std::string& path, DownloadCallbacks cb)
+        : task_id(id), file_url(url), file_name(name), dest_path(path)
+        , callbacks(std::move(cb)), state(DownloadTaskState::Pending), percent(0)
+        , auto_finish_job(false), use_original_event_id(false)
+    {}
+    
+    // Check if this is a WCP download
+    bool is_wcp_download() const {
+        return !wcp_instance.expired();
+    }
 };
 
-// Download Manager
+
 class DownloadManager {
 public:
     static DownloadManager& getInstance() {
@@ -50,11 +92,29 @@ public:
         return instance;
     }
     
-    // Start a download task
-    size_t start_download(const std::string& file_url, 
-                         const std::string& file_name,
-                         std::shared_ptr<SSWCP_Instance> wcp_instance);
+    // ============================================================================
+    // WCP Download Interface (for Web-to-PC communication)
+    // ============================================================================
+    size_t start_wcp_download(const std::string& file_url, 
+                              const std::string& file_name,
+                              std::shared_ptr<SSWCP_Instance> wcp_instance,
+                              bool use_original_event_id = false);
     
+    // ============================================================================
+    // Internal Download Interface (for PC internal use)
+    // ============================================================================
+    size_t start_internal_download(const std::string& file_url,
+                                    const std::string& file_name,
+                                    const std::string& dest_path,
+                                    DownloadCallbacks callbacks);
+
+    size_t start_internal_download(const std::string& file_url,
+                                    const std::string& file_name,
+                                    DownloadCallbacks callbacks);
+    
+    // ============================================================================
+    // Common Interface (works for both WCP and internal downloads)
+    // ============================================================================
     // Cancel a download task
     bool cancel_download(size_t task_id);
     
@@ -65,11 +125,14 @@ public:
     bool resume_download(size_t task_id);
     
     // Get task state
-    SMDownloadState get_task_state(size_t task_id);
+    DownloadTaskState get_task_state(size_t task_id);
     
     // Get task information
     std::shared_ptr<DownloadTask> get_task(size_t task_id);
     
+    // Get all active tasks
+    std::vector<std::shared_ptr<DownloadTask>> get_all_tasks();
+    
 private:
     DownloadManager() = default;
     ~DownloadManager() = default;
@@ -84,15 +147,54 @@ private:
     std::unordered_map<size_t, int> m_last_percent;
     std::unordered_map<size_t, std::chrono::steady_clock::time_point> m_last_update;
     
-    // Send progress update to WCP
-    void send_progress_update(std::shared_ptr<DownloadTask> task, int percent, 
-                              size_t downloaded, size_t total);
+    // ============================================================================
+    // Internal Implementation
+    // ============================================================================
     
-    // Send completion message to WCP
-    void send_complete_update(std::shared_ptr<DownloadTask> task, const std::string& file_path);
+    // Common download implementation (used by both WCP and internal downloads)
+    void start_download_impl(std::shared_ptr<DownloadTask> task);
     
-    // Send error message to WCP
-    void send_error_update(std::shared_ptr<DownloadTask> task, const std::string& error);
+    // Send progress update (handles both WCP and internal modes)
+    void send_progress_update(std::shared_ptr<DownloadTask> task,
+                              int percent, 
+                              size_t downloaded,
+                              size_t total);
+    
+    // Send completion message (handles both WCP and internal modes)
+    void send_complete_update(std::shared_ptr<DownloadTask> task,
+                              const std::string& file_path);
+    
+    // Send error message (handles both WCP and internal modes)
+    void send_error_update(std::shared_ptr<DownloadTask> task,
+                           const std::string& error);
+    
+    // WCP-specific: Send progress update via WCP instance
+    void send_wcp_progress_update(std::shared_ptr<DownloadTask> task, 
+                                  int percent,
+                                  size_t downloaded,
+                                  size_t total);
+    
+    // WCP-specific: Send completion via WCP instance
+    void send_wcp_complete_update(std::shared_ptr<DownloadTask> task,
+                                  const std::string& file_path);
+    
+    // WCP-specific: Send error via WCP instance
+    void send_wcp_error_update(std::shared_ptr<DownloadTask> task,
+                               const std::string& error);
+    
+    // Internal-specific: Call progress callback
+    void call_internal_progress_callback(std::shared_ptr<DownloadTask> task,
+                                         int percent,
+                                         size_t downloaded,
+                                         size_t total);
+    
+    // Internal-specific: Call complete callback
+    void call_internal_complete_callback(std::shared_ptr<DownloadTask> task,
+                                         const std::string& file_path);
+    
+    // Internal-specific: Call error callback
+    void call_internal_error_callback(std::shared_ptr<DownloadTask> task,
+                                      const std::string& error);
     
     // Clean up completed task
     void cleanup_task(size_t task_id);
@@ -100,5 +202,5 @@ private:
 
 }} // namespace Slic3r::GUI
 
-#endif // slic3r_WCPDownloadManager_hpp_
+#endif // slic3r_DownloadManager_hpp_
 

src/slic3r/GUI/GUI_App.cpp

@@ -13,7 +13,7 @@
 #include "slic3r/GUI/WebPresetDialog.hpp"
 
 #include "slic3r/GUI/SSWCP.hpp"
-#include "slic3r/GUI/WCPDownloadManager.hpp"
+#include "slic3r/GUI/DownloadManager.hpp"
 #include "slic3r/Utils/PresetUpdater.hpp"
 #include "slic3r/Config/Version.hpp"
 

src/slic3r/GUI/SSWCP.cpp

@@ -2,7 +2,7 @@
 #include "SSWCP.hpp"
 #include "GUI_App.hpp"
 #include "MainFrame.hpp"
-#include "WCPDownloadManager.hpp"
+#include "DownloadManager.hpp"
 #include "nlohmann/json.hpp"
 #include "slic3r/GUI/Tab.hpp"
 #include "sentry_wrapper/SentryWrapper.hpp"
@@ -4387,7 +4387,8 @@ void SSWCP_UserLogin_Instance::sw_GetUserUpdatePrivacy()
 
 }
 
-void SSWCP_UserLogin_Instance::sw_DownloadFile() {
+void SSWCP_UserLogin_Instance::sw_DownloadFile() 
+{
     try {
         std::string fileName = m_param_data.count("file_name") ? m_param_data["file_name"].get<std::string>() : "";
         std::string fileUrl  = m_param_data.count("file_url") ? m_param_data["file_url"].get<std::string>() : "";
@@ -4397,17 +4398,55 @@ void SSWCP_UserLogin_Instance::sw_DownloadFile() {
             return;
         }
 
-        // Use WCP Download Manager
+        // Use Download Manager
         DownloadManager* download_mgr = wxGetApp().download_manager();
         if (!download_mgr) {
-            handle_general_fail(-1, "WCP Download Manager not available");
+            handle_general_fail(-1, "Download Manager not available");
             return;
         }
 
-        // Start download task
-        size_t task_id = download_mgr->start_download(fileUrl, fileName, shared_from_this());
-        
+        size_t task_id = download_mgr->start_wcp_download(fileUrl,
+                                                          fileName,
+                                                          shared_from_this(), 
+                                                          false); // use_original_event_id = false (sw_DownloadFile: finish immediately)
+
         // Return task ID to Flutter
+        json response;
+        response["task_id"]   = task_id;
+        response["file_name"] = fileName;
+        response["file_url"]  = fileUrl;
+        m_res_data            = response;
+        m_status              = 0;
+        m_msg                 = "Download started";
+        send_to_js();
+        finish_job();
+
+    } catch (std::exception& e) {
+        handle_general_fail(-1, e.what());
+    }
+}
+
+void SSWCP_UserLogin_Instance::sw_DownloadFileEx() {
+    try {
+        std::string fileName = m_param_data.count("file_name") ? m_param_data["file_name"].get<std::string>() : "";
+        std::string fileUrl  = m_param_data.count("file_url") ? m_param_data["file_url"].get<std::string>() : "";
+
+        if (fileUrl.empty() || fileName.empty()) {
+            handle_general_fail(-1, "file_url and file_name are required");
+            return;
+        }
+
+        // Use Download Manager
+        DownloadManager* download_mgr = wxGetApp().download_manager();
+        if (!download_mgr) {
+            handle_general_fail(-1, "Download Manager not available");
+            return;
+        }
+        size_t task_id = download_mgr->start_wcp_download(fileUrl,
+                                                          fileName,
+                                                          shared_from_this(),
+                                                          true); 
+        
         json response;
         response["task_id"] = task_id;
         response["file_name"] = fileName;
@@ -4416,9 +4455,7 @@ void SSWCP_UserLogin_Instance::sw_DownloadFile() {
         m_status = 0;
         m_msg = "Download started";
         send_to_js();
-        // Note: Do not call finish_job() here, as download is asynchronous
-        // The manager will send progress updates and completion/error messages via WCP
-        
+              
     } catch (std::exception& e) {
         handle_general_fail(-1, e.what());
     }

src/slic3r/GUI/SSWCP.hpp

@@ -541,6 +541,9 @@ private:
     void sw_SubUserUpdatePrivacy();
 
     void sw_DownloadFile();
+
+    void sw_DownloadFileEx();
+
     void sw_CancelDownload();
 
     void sw_FileView();