crosspoint-reader/src/network/CrossPointWebServer.h

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Add connect to Wifi and File Manager Webserver (#41) ## Summary - **What is the goal of this PR?** Implements wireless EPUB file management via a built-in web server, enabling users to upload, browse, organize, and delete EPUB files from any device on the same WiFi network without needing a computer cable connection. - **What changes are included?** - **New Web Server** ([`CrossPointWebServer.cpp`](src/CrossPointWebServer.cpp), [`CrossPointWebServer.h`](src/CrossPointWebServer.h)): - HTTP server on port 80 with a responsive HTML/CSS interface - Home page showing device status (version, IP, free memory) - File Manager with folder navigation and breadcrumb support - EPUB file upload with progress tracking - Folder creation and file/folder deletion - XSS protection via HTML escaping - Hidden system folders (`.` prefixed, "System Volume Information", "XTCache") - **WiFi Screen** ([`WifiScreen.cpp`](src/screens/WifiScreen.cpp), [`WifiScreen.h`](src/screens/WifiScreen.h)): - Network scanning with signal strength indicators - Visual indicators for encrypted (`*`) and saved (`+`) networks - State machine managing: scanning, network selection, password entry, connecting, save/forget prompts - 15-second connection timeout handling - Integration with web server (starts on connect, stops on exit) - **WiFi Credential Storage** ([`WifiCredentialStore.cpp`](src/WifiCredentialStore.cpp), [`WifiCredentialStore.h`](src/WifiCredentialStore.h)): - Persistent storage in `/sd/.crosspoint/wifi.bin` - XOR obfuscation for stored passwords (basic protection against casual reading) - Up to 8 saved networks with add/remove/update operations - **On-Screen Keyboard** ([`OnScreenKeyboard.cpp`](src/screens/OnScreenKeyboard.cpp), [`OnScreenKeyboard.h`](src/screens/OnScreenKeyboard.h)): - Reusable QWERTY keyboard component with shift support - Special keys: Shift, Space, Backspace, Done - Support for password masking mode - **Settings Screen Integration** ([`SettingsScreen.h`](src/screens/SettingsScreen.h)): - Added WiFi action to navigate to the new WiFi screen - **Documentation** ([`docs/webserver.md`](docs/webserver.md)): - Comprehensive user guide covering WiFi setup, web interface usage, file management, troubleshooting, and security notes - See this for more screenshots! - Working "displays the right way in GitHub" on my repo: https://github.com/olearycrew/crosspoint-reader/blob/feature/connect-to-wifi/docs/webserver.md **Video demo** https://github.com/user-attachments/assets/283e32dc-2d9f-4ae2-848e-01f41166a731 ## Additional Context - **Security considerations**: The web server has no authentication—anyone on the same WiFi network can access files. This is documented as a limitation, recommending use only on trusted private networks. Password obfuscation in the credential store is XOR-based, not cryptographically secure. - **Memory implications**: The web server and WiFi stack consume significant memory. The implementation properly cleans up (stops server, disconnects WiFi, sets `WIFI_OFF` mode) when exiting the WiFi screen to free resources. - **Async operations**: Network scanning and connection use async patterns with FreeRTOS tasks to prevent blocking the UI. The display task handles rendering on a dedicated thread with mutex protection. - **Browser compatibility**: The web interface uses standard HTML5/CSS3/JavaScript and is tested to work with all modern browsers on desktop and mobile. --------- Co-authored-by: Dave Allie <dave@daveallie.com>
2025-12-19 09:05:43 -05:00
#pragma once
#include <WebServer.h>
#include <vector>
// Structure to hold file information
struct FileInfo {
String name;
size_t size;
bool isEpub;
bool isDirectory;
};
class CrossPointWebServer {
public:
CrossPointWebServer();
~CrossPointWebServer();
// Start the web server (call after WiFi is connected)
void begin();
// Stop the web server
void stop();
// Call this periodically to handle client requests
void handleClient();
// Check if server is running
bool isRunning() const { return running; }
// Get the port number
uint16_t getPort() const { return port; }
private:
WebServer* server = nullptr;
bool running = false;
uint16_t port = 80;
// File scanning
std::vector<FileInfo> scanFiles(const char* path = "/");
String formatFileSize(size_t bytes);
bool isEpubFile(const String& filename);
// Request handlers
void handleRoot();
void handleNotFound();
void handleStatus();
void handleFileList();
void handleUpload();
void handleUploadPost();
void handleCreateFolder();
void handleDelete();
};