Add WebSocket support and enhance chat functionality

- Implement WebSocket handling in the FastCGI server, allowing for real-time communication.
- Introduce functions for managing WebSocket connections, broadcasting messages, and sending to specific connections.
- Create a chat interface in the `websockets.ws.uce` file, including message handling and user notifications.
- Refactor existing code to accommodate WebSocket integration, ensuring compatibility with HTTP requests.
- Update documentation to reflect new features and usage instructions for WebSocket functionality.

src/lib/uri.h

@@ -17,69 +17,20 @@ StringMap load_session_data(String session_id);
 void save_session_data(String session_id, StringMap data);
 String session_start(String session_name = "uce-session");
 void session_destroy(String session_name = "uce-session");
+String ws_make_accept_key(String client_key);
+String ws_encode_frame(String payload, u8 opcode = 0x1, bool is_final_fragment = true);
+String ws_close_frame(u16 status_code = 1000, String reason = "");
 
 struct WSFrame {
 
-	u8 opcode;
-	u8 is_final_fragment;
-	u8 mask_bit;
-	u64 payload_length;
-	u64 offset;
-	u8* payload;
+	u8 opcode = 0;
+	bool is_final_fragment = false;
+	bool mask_bit = false;
+	u64 payload_length = 0;
+	u64 header_length = 0;
+	u64 frame_length = 0;
+	String payload;
 
-	WSFrame(String& bufstr)
-	{
-		const char* buffer = bufstr.c_str();
-		u64 buffer_size = bufstr.size();
-		opcode = buffer[0] & 0x0F;
-		is_final_fragment = buffer[0] & 0x80;
-		mask_bit = buffer[1] & 0x80;
-		payload_length = buffer[1] & 0x7F;
-
-		offset = 2;
-		if (payload_length == 126) {
-			payload_length = ((u64) buffer[2] << 8) | buffer[3];
-			offset = 4;
-		} else if (payload_length == 127) {
-			payload_length = ((u64) buffer[2] << 56) |
-				((u64) buffer[3] << 48) |
-				((u64) buffer[4] << 40) |
-				((u64) buffer[5] << 32) |
-				((u64) buffer[6] << 24) |
-				((u64) buffer[7] << 16) |
-				((u64) buffer[8] << 8) |
-				buffer[9];
-			offset = 10;
-		}
-
-		uint8_t* maskingKey = nullptr;
-		if (mask_bit) {
-			maskingKey = reinterpret_cast<uint8_t*>(const_cast<char*>(buffer + offset));
-			offset += 4;
-		}
-
-		// Parse the frame payload
-		payload = reinterpret_cast<uint8_t*>(const_cast<char*>(buffer + offset));
-		if (mask_bit) {
-			for (int i = 0; i < payload_length; i++) {
-				payload[i] = payload[i] ^ maskingKey[i % 4];
-			}
-		}
-
-		// Print the parsed frame
-		std::cout << "Parsed WebSocket frame:" << std::endl;
-		std::cout << "  Opcode: " << (int) opcode << std::endl;
-		std::cout << "  Is final fragment: " << (is_final_fragment ? "true" : "false") << std::endl;
-		std::cout << "  Payload length: " << payload_length << std::endl;
-		if (mask_bit) {
-			std::cout << "  Masking key: ";
-			for (int i = 0; i < 4; i++) {
-				std::cout << std::hex << (int) maskingKey[i] << " ";
-			}
-			std::cout << std::endl;
-		}
-		std::cout << "  Payload: " << std::endl << std::string((const char*) payload, payload_length) << std::endl;
-
-	}
+	bool parse(const String& buffer, String& error);
 
 };