可以接收远程图像,并进行操作且测试没有问题

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2026-03-02 20:03:25 +08:00
parent 45baf4c956
commit 7b540e1ed4
4 changed files with 437 additions and 204 deletions

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#!/usr/bin/env python3 #!/usr/bin/env python3
# -*- coding: utf-8 -*- # -*- coding: utf-8 -*-
""" """
远程显示 Web 服务 - Flask 实现 远程显示 Web 服务 - Flask + WebSocket 实现
通过 RemoDispBus 协议与 DTU 装置通信,将远程 LCD 画面以 Web 页面形式展示。
前端通过 WebSocket 连接,服务端主动推送屏幕数据,实现低延迟传输。
用法: python remo_disp_server.py [装置IP] 用法: python remo_disp_server.py [装置IP]
启动后访问 http://localhost:8181 启动后访问 http://localhost:8181
依赖: pip install flask 依赖: pip install flask flask-socketio pillow
""" """
# base64将二进制 PNG 编码为字符串,便于通过 JSON/WebSocket 传输
import base64
# socket与 DTU 装置的 TCP 通信
import socket import socket
# struct将整数打包为二进制如起始地址 4 字节)
import struct import struct
import time # threading后台线程持续拉取屏幕并推送
import threading
# sys读取命令行参数装置 IP
import sys import sys
# os获取当前脚本目录拼接 favicon 路径
import os import os
# ioBytesIO 用于在内存中保存 PNG
import io import io
from typing import Optional, Tuple # typing类型注解
from typing import Optional, Tuple, Set
from flask import Flask, request, jsonify, send_file, Response # FlaskWeb 框架,提供 HTTP 路由
from flask import Flask, request, send_file
# SocketIOWebSocket 支持,实现实时双向通信
from flask_socketio import SocketIO, emit
# 协议常量 # =============================================================================
# 协议常量RemoDispBus
# =============================================================================
# TAG_CLIENT 0xAA客户端发送帧的帧头标识
# TAG_DEVICE 0xBB设备回复帧的帧头标识
TAG_CLIENT, TAG_DEVICE = 0xAA, 0xBB TAG_CLIENT, TAG_DEVICE = 0xAA, 0xBB
# PORT 7003RemoDispBus 协议默认端口
PORT = 7003 PORT = 7003
# CMD_KEEPLIVE 0保活
# CMD_INIT 1初始化获取屏幕宽高、显存大小
# CMD_KEY 2按键
# CMD_LCDMEM 3读取显存屏幕画面
CMD_KEEPLIVE, CMD_INIT, CMD_KEY, CMD_LCDMEM = 0, 1, 2, 3 CMD_KEEPLIVE, CMD_INIT, CMD_KEY, CMD_LCDMEM = 0, 1, 2, 3
# 全局连接 # =============================================================================
# 全局状态
# =============================================================================
# _sock与 DTU 装置的 TCP socketNone 表示未连接
_sock: Optional[socket.socket] = None _sock: Optional[socket.socket] = None
# _init_info初始化信息width/height/mem_size由 CMD_INIT 获取
_init_info: Optional[dict] = None _init_info: Optional[dict] = None
# _screen_clients当前需要接收屏幕推送的 WebSocket 客户端 sid 集合
_screen_clients: Set[str] = set()
# _refresh_thread后台刷新线程持续拉取屏幕并推送
_refresh_thread: Optional[threading.Thread] = None
# _refresh_stopEventset 时刷新线程退出
_refresh_stop = threading.Event()
# =============================================================================
# 协议帧编解码
# =============================================================================
def calc_crc(data: bytes) -> int: def calc_crc(data: bytes) -> int:
crc = 0 """
对数据区逐字节异或,取低 8 位作为 CRC 校验码。
协议规定CRC = data[0] ^ data[1] ^ ... ^ data[n-1],取低 8 位。
"""
crc = 0 # 初始值为 0
for b in data: for b in data:
crc ^= b crc ^= b # 逐字节异或
return crc & 0xFF return crc & 0xFF # 取低 8 位作为最终 CRC
def build_frame(cmd: int, data: bytes) -> bytes: def build_frame(cmd: int, data: bytes) -> bytes:
length = len(data) """
构造一帧发送数据,格式: [TAG(1)][cmd(1)][len_hi(1)][len_lo(1)][data][crc(1)]
length 大端 2 字节crc 对 data 计算。
"""
length = len(data) # 数据区长度
# 构造帧头TAG_CLIENT + cmd + 长度高字节 + 长度低字节(大端序)
header = bytes([TAG_CLIENT, cmd & 0xFF, (length >> 8) & 0xFF, length & 0xFF]) header = bytes([TAG_CLIENT, cmd & 0xFF, (length >> 8) & 0xFF, length & 0xFF])
return header + data + bytes([calc_crc(data)]) return header + data + bytes([calc_crc(data)]) # 帧头 + 数据 + CRC
def parse_frame(raw: bytes) -> Optional[Tuple[int, bytes]]: def parse_frame(raw: bytes) -> Optional[Tuple[int, bytes]]:
if len(raw) < 6 or raw[0] != TAG_DEVICE: """
解析设备回复帧,返回 (cmd, data) 或 None。
帧格式: [TAG(1)][cmd(1)][len_hi(1)][len_lo(1)][data(length)][crc(1)]
"""
if len(raw) < 6 or raw[0] != TAG_DEVICE: # 至少 6 字节且帧头为 TAG_DEVICE
return None return None
length = (raw[2] << 8) | raw[3] length = (raw[2] << 8) | raw[3] # 大端序解析数据区长度
if len(raw) < 5 + length + 1: if len(raw) < 4 + length + 1: # 检查是否收齐整帧头4字节+数据+CRC1字节
return None return None
data = raw[4:4 + length] data = raw[4:4 + length] # 提取数据区
if calc_crc(data) != raw[4 + length]: if calc_crc(data) != raw[4 + length]: # CRC 校验失败
return None return None
return (raw[1], data) return (raw[1], data) # 返回 (命令码, 数据)
# =============================================================================
# 连接与收发
# =============================================================================
def connect(host: str, port: int = PORT) -> bool: def connect(host: str, port: int = PORT) -> bool:
"""
建立与 DTU 装置的 TCP 连接。
若有旧连接则先关闭;连接时超时 3 秒;连接成功后设为 2 秒。
"""
global _sock, _init_info global _sock, _init_info
try: try:
if _sock: if _sock:
_sock.close() _sock.close() # 关闭旧连接
_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) _sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 创建 TCP socket
_sock.settimeout(5.0) _sock.settimeout(3.0) # 连接阶段超时 3 秒
_sock.connect((host, port)) _sock.connect((host, port)) # 连接目标主机和端口
_sock.settimeout(2.0) _sock.settimeout(2.0) # 连接成功后收发超时 2 秒
_init_info = _request_init()
return True return True
except Exception: except Exception:
return False return False
def _send(cmd: int, data: bytes = b"") -> bool: def _send(cmd: int, data: bytes = b"") -> bool:
"""发送一帧到设备"""
if not _sock: if not _sock:
return False return False
try: try:
_sock.sendall(build_frame(cmd, data)) _sock.sendall(build_frame(cmd, data)) # 构造帧并一次性发送
return True return True
except Exception: except Exception:
return False return False
def _recv() -> Optional[Tuple[int, bytes]]: def _recv() -> Optional[Tuple[int, bytes]]:
"""
从设备接收一帧,一次性 recv 最多 256KB。
至少需 5 字节4 字节头+1 字节数据或 CRC根据头中 length 检查是否收齐整帧。
"""
if not _sock: if not _sock:
return None return None
try: try:
header = _sock.recv(5) data = _sock.recv(256 * 1024) # 单次接收最多 256KB
if len(header) < 5: if len(data) < 5: # 至少需要 5 字节4 头 + 1 数据/CRC
return None return None
length = (header[2] << 8) | header[3] length = (data[2] << 8) | data[3] # 解析数据区长度
rest = _sock.recv(length + 1) if len(data) < 4 + length + 1: # 数据不完整
if len(rest) < length + 1:
return None return None
return parse_frame(header + rest) return parse_frame(data[:4 + length + 1]) # 解析并返回 (cmd, data)
except Exception: except Exception:
return None return None
def _request_init() -> Optional[dict]:
if not _send(CMD_INIT):
return None
for _ in range(30):
result = _recv()
if result and result[0] == CMD_INIT:
data = result[1]
if len(data) >= 29:
return {
"width": (data[0] << 8) | data[1],
"height": (data[2] << 8) | data[3],
"mem_size": (data[5] << 24) | (data[6] << 16) | (data[7] << 8) | data[8],
}
time.sleep(0.05)
return None
def send_key(code: int) -> bool: def send_key(code: int) -> bool:
return _send(CMD_KEY, bytes([code & 0xFF])) """发送按键码到设备"""
return _send(CMD_KEY, bytes([code & 0xFF])) # 按键码单字节
def fetch_screen() -> Optional[bytes]: def fetch_screen() -> Optional[bytes]:
global _init_info """
info = _init_info or _request_init() 向设备请求当前屏幕显存,返回 1bpp 位图数据。
if not info: 发送 CMD_LCDMEM + 起始地址 0设备回复 payload 前 4 字节为地址,后续为位图,返回 payload[4:]。
"""
if not _sock:
return None return None
mem_size = info["mem_size"] if not _send(CMD_LCDMEM, struct.pack(">I", 0)): # 发送读取显存命令,起始地址 0大端 4 字节)
buffer = bytearray(mem_size)
pos = 0
while pos < mem_size:
if not _send(CMD_LCDMEM, struct.pack(">I", pos)):
return None return None
for _ in range(40): result = _recv() # 接收设备回复
result = _recv() if result and result[0] == CMD_LCDMEM: # 确认为 LCDMEM 回复
if result and result[0] == CMD_LCDMEM: payload = result[1] # 数据区
payload = result[1] if len(payload) >= 4: # 前 4 字节为地址,后面是位图
if len(payload) >= 4: return payload[4:]
start = struct.unpack(">I", payload[:4])[0] return payload or None
chunk = payload[4:]
buffer[start : start + len(chunk)] = chunk
pos = start + len(chunk)
break
time.sleep(0.02)
else:
return None return None
return bytes(buffer)
def mono_to_png(data: bytes, width: int, height: int) -> Optional[bytes]: def mono_to_png(data: bytes, width: int, height: int) -> Optional[bytes]:
"""
将 1bpp 位图转为 PNG 字节流。
每字节 8 像素高位在前bi=(y*w+x)//8 为字节索引bit=7-(x%8) 为位索引1 为白 2550 为黑 0。
"""
try: try:
from PIL import Image from PIL import Image
img = Image.new("1", (width, height)) img = Image.new("1", (width, height)) # 创建 1bpp 黑白图像
pix = img.load() pix = img.load() # 获取像素访问对象
for y in range(height): for y in range(height):
for x in range(width): for x in range(width):
bi = (y * width + x) // 8 bi = (y * width + x) // 8 # 字节索引:每 8 像素一字节
bit = 7 - (x % 8) bit = 7 - (x % 8) # 位索引:高位在前
pix[x, y] = 255 if (bi < len(data) and (data[bi] >> bit) & 1) else 0 pix[x, y] = 255 if (bi < len(data) and (data[bi] >> bit) & 1) else 0 # 1→白 0→黑
buf = io.BytesIO() buf = io.BytesIO() # 内存缓冲区
img.save(buf, format="PNG") img.save(buf, format="PNG") # 保存为 PNG 格式
return buf.getvalue() return buf.getvalue() # 返回 PNG 字节流
except ImportError: except ImportError:
return None return None
app = Flask(__name__) def disconnect_device():
"""关闭与设备的连接"""
global _sock, _init_info
try:
if _sock:
_sock.close() # 关闭 socket
_sock = None # 清空引用
_init_info = None # 清空初始化信息
except Exception:
pass
# =============================================================================
# 屏幕推送线程
# =============================================================================
def _screen_refresh_loop():
"""
后台线程:每约 100ms 拉取一帧屏幕,转 PNG 后 base64 推送给各 WebSocket 客户端。
_refresh_stop.wait(0.1) 既作间隔,也便于收到 set 时快速退出。
"""
global _screen_clients, _refresh_stop
while not _refresh_stop.is_set(): # 未被要求停止时持续循环
if _screen_clients and _sock: # 有客户端且已连接设备
data = fetch_screen() # 拉取屏幕位图
if data:
info = _init_info or {} # 获取宽高,缺省 160x160
w, h = info.get("width", 160), info.get("height", 160)
png = mono_to_png(data, w, h) # 转为 PNG
if png:
b64 = base64.b64encode(png).decode("ascii") # base64 编码便于 JSON 传输
for sid in list(_screen_clients): # 复制列表避免迭代时修改
try:
socketio.emit("screen", {"png": b64, "w": w, "h": h}, room=sid) # 推送给该客户端
except Exception:
pass
_refresh_stop.wait(timeout=0.1) # 等待 100ms若被 set 则立即返回
# =============================================================================
# Flask + SocketIO
# =============================================================================
app = Flask(__name__) # 创建 Flask 应用
app.config["SECRET_KEY"] = "remo_disp" # 会话密钥
socketio = SocketIO(app, cors_allowed_origins="*") # 创建 SocketIO允许跨域
FAVICON_PATH = os.path.join(os.path.dirname(__file__), "static", "favicon.ico") # favicon 文件路径
@app.route("/favicon.ico")
def favicon():
"""提供网站图标"""
if os.path.exists(FAVICON_PATH):
return send_file(FAVICON_PATH, mimetype="image/x-icon")
return "", 404 # 不存在则返回 404
@app.route("/") @app.route("/")
@app.route("/index.html") @app.route("/index.html")
def index(): def index():
"""主页,返回前端 HTML"""
return send_file( return send_file(
os.path.join(os.path.dirname(__file__), "remo_disp_ui.html"), os.path.join(os.path.dirname(__file__), "remo_disp_ui.html"),
mimetype="text/html; charset=utf-8", mimetype="text/html; charset=utf-8",
) )
@app.route("/connect") @socketio.on("connect")
def api_connect(): def on_connect():
host = request.args.get("host", "").strip() """WebSocket 客户端连接时触发(可留空)"""
port = int(request.args.get("port", PORT)) pass
ok = connect(host, port)
return jsonify(success=ok, error=None if ok else "connect failed")
@app.route("/key") @socketio.on("disconnect")
def api_key(): def on_disconnect():
code = int(request.args.get("code", 0)) """WebSocket 客户端断开(关标签页等)时,从 _screen_clients 移除,若无客户端则断开设备"""
send_key(code) global _screen_clients, _refresh_thread, _refresh_stop
return jsonify(ok=True) sid = request.sid # 获取断开客户端的 session id
if sid in _screen_clients:
_screen_clients.discard(sid) # 从订阅列表移除
if not _screen_clients: # 若无其他客户端
_refresh_stop.set() # 通知刷新线程停止
disconnect_device() # 断开设备连接
@app.route("/screen") @socketio.on("connect_device")
def api_screen(): def on_connect_device(data):
data = fetch_screen() """前端请求连接设备:连接成功后加入 _screen_clients启动刷新线程回复 connect_result"""
if not data: global _screen_clients, _refresh_thread, _refresh_stop
return "", 500 host = (data.get("host") or "").strip() # 从 data 取 host去空格
info = _init_info or {} port = int(data.get("port") or PORT) # 从 data 取 port缺省 7003
w, h = info.get("width", 160), info.get("height", 160) ok = connect(host, port) # 建立 TCP 连接
png = mono_to_png(data, w, h) if ok:
if png: _screen_clients.add(request.sid) # 将当前客户端加入屏幕订阅
return Response(png, mimetype="image/png") _refresh_stop.clear() # 清除停止标志,允许刷新线程运行
resp = Response(data, mimetype="application/octet-stream") if _refresh_thread is None or not _refresh_thread.is_alive(): # 刷新线程未运行
resp.headers["X-Width"] = str(w) _refresh_thread = threading.Thread(target=_screen_refresh_loop, daemon=True) # 创建后台线程
resp.headers["X-Height"] = str(h) _refresh_thread.start() # 启动线程
return resp emit("connect_result", {"success": True}) # 回复连接成功
else:
emit("connect_result", {"success": False, "error": "connect failed"}) # 回复连接失败
@socketio.on("disconnect_device")
def on_disconnect_device():
"""前端请求断开设备:从 _screen_clients 移除,若无客户端则断开设备,回复 disconnect_result"""
global _screen_clients, _refresh_stop
sid = request.sid
_screen_clients.discard(sid) # 从订阅列表移除
if not _screen_clients: # 若无其他客户端
_refresh_stop.set() # 通知刷新线程停止
disconnect_device() # 断开设备连接
emit("disconnect_result", {"ok": True}) # 回复断开成功
@socketio.on("key")
def on_key(data):
"""前端发送按键:从 data 取 code转发给设备"""
code = int(data.get("code", 0)) # 按键码,缺省 0
send_key(code) # 发送给 DTU 设备
# =============================================================================
# 启动
# =============================================================================
def main(): def main():
port = 8181 """主入口:启动 Web 服务"""
port = 8181 # HTTP 服务端口
print(f"远程显示服务: http://localhost:{port}") print(f"远程显示服务: http://localhost:{port}")
print("在浏览器中打开上述地址,点击「连接」输入装置 IP") print("使用 WebSocket 传输,在浏览器中打开上述地址")
if len(sys.argv) >= 2: if len(sys.argv) >= 2:
connect(sys.argv[1]) connect(sys.argv[1]) # 若命令行有 IP预连接
print(f"已预连接: {sys.argv[1]}") print(f"已预连接: {sys.argv[1]}")
app.run(host="0.0.0.0", port=port, debug=False, threaded=True) socketio.run(app, host="0.0.0.0", port=port, debug=True, allow_unsafe_werkzeug=True) # 监听所有网卡
if __name__ == "__main__": if __name__ == "__main__":

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@@ -1,51 +1,83 @@
<!DOCTYPE html> <!DOCTYPE html>
<!-- 文档类型声明HTML5 -->
<html lang="zh-CN"> <html lang="zh-CN">
<!-- 根元素,语言设为简体中文 -->
<head> <head>
<!-- 头部:元数据与资源 -->
<meta charset="UTF-8"> <meta charset="UTF-8">
<!-- 字符编码UTF-8 -->
<meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 视口:适配移动端,初始缩放 1 -->
<title>远程显示</title> <title>远程显示</title>
<!-- 页面标题 -->
<link rel="icon" type="image/x-icon" href="/favicon.ico">
<!-- 网站图标 -->
<script src="https://cdn.socket.io/4.7.2/socket.io.min.js"></script>
<!-- Socket.IO 客户端库,用于 WebSocket 通信 -->
<style> <style>
/* ========== 全局样式 ========== */
* { box-sizing: border-box; margin: 0; padding: 0; } * { box-sizing: border-box; margin: 0; padding: 0; }
/* 通配符:盒模型为 border-box去除默认边距 */
body { body {
font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
/* 字体:微软雅黑、苹方,无衬线回退 */
background: linear-gradient(135deg, #e8f4fc 0%, #f0f8ff 50%, #e6f2ff 100%); background: linear-gradient(135deg, #e8f4fc 0%, #f0f8ff 50%, #e6f2ff 100%);
/* 背景135 度渐变,浅蓝到淡蓝 */
min-height: 100vh; min-height: 100vh;
/* 最小高度为视口高度 */
padding: 16px; padding: 16px;
/* 内边距 */
} }
/* ========== 主容器 ========== */
.app { .app {
max-width: 900px; max-width: 900px;
/* 最大宽度限制 */
margin: 0 auto; margin: 0 auto;
/* 水平居中 */
background: #fff; background: #fff;
/* 白色背景 */
border-radius: 12px; border-radius: 12px;
/* 圆角 */
box-shadow: 0 4px 20px rgba(0,0,0,0.08); box-shadow: 0 4px 20px rgba(0,0,0,0.08);
/* 阴影 */
overflow: hidden; overflow: hidden;
/* 子元素超出则裁剪 */
} }
/* 顶部菜单栏 */ /* ========== 顶部菜单栏 ========== */
.menu-bar { .menu-bar {
display: flex; display: flex;
/* 弹性布局 */
align-items: center; align-items: center;
/* 垂直居中 */
justify-content: center; justify-content: center;
/* 水平居中 */
gap: 8px; gap: 8px;
/* 子元素间距 */
padding: 12px 16px; padding: 12px 16px;
background: #fff; background: #fff;
border-bottom: 1px solid #e8e8e8; border-bottom: 1px solid #e8e8e8;
/* 底部分割线 */
} }
.menu-item { .menu-item {
display: flex; display: flex;
flex-direction: column; flex-direction: column;
/* 纵向排列图标和文字 */
align-items: center; align-items: center;
gap: 4px; gap: 4px;
padding: 8px 14px; padding: 8px 14px;
border: none; border: none;
background: transparent; background: transparent;
cursor: pointer; cursor: pointer;
/* 鼠标指针为手型 */
border-radius: 8px; border-radius: 8px;
transition: all 0.2s; transition: all 0.2s;
/* 过渡动画 */
color: #333; color: #333;
font-size: 12px; font-size: 12px;
} }
.menu-item:hover { .menu-item:hover {
background: #f5f5f5; background: #f5f5f5;
/* 悬停时浅灰背景 */
} }
.menu-item .icon { .menu-item .icon {
width: 28px; width: 28px;
@@ -54,44 +86,59 @@
align-items: center; align-items: center;
justify-content: center; justify-content: center;
font-size: 18px; font-size: 18px;
/* 图标区域 */
} }
.menu-item.connect .icon { color: #22c55e; } .menu-item.connect .icon { color: #22c55e; }
/* 连接按钮图标:绿色 */
.menu-item.settings .icon { color: #3b82f6; } .menu-item.settings .icon { color: #3b82f6; }
/* 设置按钮图标:蓝色 */
.menu-item.exit .icon { color: #ef4444; } .menu-item.exit .icon { color: #ef4444; }
/* 断开按钮图标:红色 */
.menu-item.about .icon { color: #64748b; } .menu-item.about .icon { color: #64748b; }
/* 关于按钮图标:灰色 */
.menu-item.connected .icon { color: #22c55e; } .menu-item.connected .icon { color: #22c55e; }
.menu-item.connected { color: #22c55e; } .menu-item.connected { color: #22c55e; }
/* 主内容区 */ /* 已连接状态:绿色 */
/* ========== 主内容区 ========== */
.main { .main {
display: flex; display: flex;
padding: 16px; padding: 16px;
gap: 20px; gap: 20px;
/* 左右分栏间距 */
} }
/* 显示区域 */ /* ========== 显示区域 ========== */
.display-area { .display-area {
flex: 1; flex: 1;
/* 占据剩余空间 */
min-width: 0; min-width: 0;
/* 允许 flex 子项收缩 */
aspect-ratio: 1; aspect-ratio: 1;
/* 宽高比 1:1 */
max-height: 420px; max-height: 420px;
background: #1e3a5f; background: #1e3a5f;
/* 深蓝背景,模拟 LCD 边框 */
border-radius: 8px; border-radius: 8px;
display: flex; display: flex;
align-items: center; align-items: center;
justify-content: center; justify-content: center;
overflow: hidden; overflow: hidden;
box-shadow: inset 0 2px 8px rgba(0,0,0,0.2); box-shadow: inset 0 2px 8px rgba(0,0,0,0.2);
/* 内阴影 */
} }
.display-area canvas { .display-area canvas {
max-width: 100%; max-width: 100%;
max-height: 100%; max-height: 100%;
/* canvas 自适应容器 */
image-rendering: pixelated; image-rendering: pixelated;
image-rendering: crisp-edges; image-rendering: crisp-edges;
/* 像素风格渲染,避免模糊 */
} }
.display-placeholder { .display-placeholder {
color: rgba(255,255,255,0.5); color: rgba(255,255,255,0.5);
/* 半透明白色提示文字 */
font-size: 14px; font-size: 14px;
} }
/* 右侧控制面板 */ /* ========== 右侧控制面板 ========== */
.control-panel { .control-panel {
display: flex; display: flex;
flex-direction: column; flex-direction: column;
@@ -99,12 +146,13 @@
gap: 16px; gap: 16px;
padding: 8px; padding: 8px;
} }
/* D-pad */ /* ========== D-pad 方向键 ========== */
.dpad { .dpad {
display: grid; display: grid;
grid-template-columns: 50px 50px 50px; grid-template-columns: 50px 50px 50px;
grid-template-rows: 50px 50px 50px; grid-template-rows: 50px 50px 50px;
gap: 4px; gap: 4px;
/* 3x3 网格布局 */
} }
.dpad .btn { .dpad .btn {
width: 50px; width: 50px;
@@ -112,6 +160,7 @@
border: none; border: none;
border-radius: 8px; border-radius: 8px;
background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%); background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
/* 渐变背景 */
box-shadow: 0 2px 4px rgba(0,0,0,0.1); box-shadow: 0 2px 4px rgba(0,0,0,0.1);
cursor: pointer; cursor: pointer;
display: flex; display: flex;
@@ -125,17 +174,24 @@
background: linear-gradient(180deg, #fff 0%, #f1f3f5 100%); background: linear-gradient(180deg, #fff 0%, #f1f3f5 100%);
box-shadow: 0 3px 6px rgba(0,0,0,0.15); box-shadow: 0 3px 6px rgba(0,0,0,0.15);
transform: translateY(-1px); transform: translateY(-1px);
/* 悬停上浮效果 */
} }
.dpad .btn:active { .dpad .btn:active {
transform: translateY(0); transform: translateY(0);
box-shadow: 0 1px 2px rgba(0,0,0,0.1); box-shadow: 0 1px 2px rgba(0,0,0,0.1);
/* 按下时恢复 */
} }
.dpad .btn-up { grid-column: 2; grid-row: 1; } .dpad .btn-up { grid-column: 2; grid-row: 1; }
/* 上键:中上 */
.dpad .btn-down { grid-column: 2; grid-row: 3; } .dpad .btn-down { grid-column: 2; grid-row: 3; }
/* 下键:中下 */
.dpad .btn-left { grid-column: 1; grid-row: 2; } .dpad .btn-left { grid-column: 1; grid-row: 2; }
/* 左键:左中 */
.dpad .btn-right { grid-column: 3; grid-row: 2; } .dpad .btn-right { grid-column: 3; grid-row: 2; }
/* 右键:右中 */
.dpad .btn-ok { grid-column: 2; grid-row: 2; } .dpad .btn-ok { grid-column: 2; grid-row: 2; }
/* 动作按钮 */ /* 确认键:正中 */
/* ========== 动作按钮 ========== */
.action-btns { .action-btns {
display: flex; display: flex;
gap: 12px; gap: 12px;
@@ -160,17 +216,21 @@
transform: translateY(-1px); transform: translateY(-1px);
} }
.action-btn .icon { color: #22c55e; font-size: 16px; } .action-btn .icon { color: #22c55e; font-size: 16px; }
/* 连接设置弹窗 */ /* ========== 连接设置弹窗 ========== */
.modal { .modal {
display: none; display: none;
/* 默认隐藏 */
position: fixed; position: fixed;
inset: 0; inset: 0;
/* 全屏覆盖 */
background: rgba(0,0,0,0.4); background: rgba(0,0,0,0.4);
/* 半透明黑色遮罩 */
align-items: center; align-items: center;
justify-content: center; justify-content: center;
z-index: 100; z-index: 100;
} }
.modal.show { display: flex; } .modal.show { display: flex; }
/* 显示时用 flex 居中 */
.modal-content { .modal-content {
background: #fff; background: #fff;
padding: 24px; padding: 24px;
@@ -203,16 +263,21 @@
.modal-content .btn-primary { .modal-content .btn-primary {
background: #22c55e; background: #22c55e;
color: #fff; color: #fff;
/* 主按钮:绿色 */
} }
.modal-content .btn-secondary { .modal-content .btn-secondary {
background: #e5e7eb; background: #e5e7eb;
color: #333; color: #333;
/* 次要按钮:灰色 */
} }
</style> </style>
</head> </head>
<body> <body>
<!-- 页面主体 -->
<div class="app"> <div class="app">
<!-- 主应用容器 -->
<div class="menu-bar"> <div class="menu-bar">
<!-- 顶部菜单栏 -->
<button class="menu-item connect" id="btnConnect" title="连接"> <button class="menu-item connect" id="btnConnect" title="连接">
<span class="icon">📶</span> <span class="icon">📶</span>
<span>连接</span> <span>连接</span>
@@ -221,9 +286,9 @@
<span class="icon"></span> <span class="icon"></span>
<span>设置</span> <span>设置</span>
</button> </button>
<button class="menu-item exit" title="退出"> <button class="menu-item exit" title="断开">
<span class="icon"></span> <span class="icon"></span>
<span>退出</span> <span>断开</span>
</button> </button>
<button class="menu-item about" id="btnAbout" title="关于"> <button class="menu-item about" id="btnAbout" title="关于">
<span class="icon"></span> <span class="icon"></span>
@@ -231,12 +296,18 @@
</button> </button>
</div> </div>
<div class="main"> <div class="main">
<!-- 主内容区:显示 + 控制 -->
<div class="display-area"> <div class="display-area">
<!-- 屏幕显示区域 -->
<canvas id="screen" style="display:none;"></canvas> <canvas id="screen" style="display:none;"></canvas>
<!-- canvas 初始隐藏,有画面后显示 -->
<span class="display-placeholder" id="placeholder">点击「连接」连接装置</span> <span class="display-placeholder" id="placeholder">点击「连接」连接装置</span>
<!-- 未连接时的提示文字 -->
</div> </div>
<div class="control-panel"> <div class="control-panel">
<!-- 右侧控制面板 -->
<div class="dpad"> <div class="dpad">
<!-- 方向键 + 确认 -->
<button class="btn btn-up" data-key="U"></button> <button class="btn btn-up" data-key="U"></button>
<button class="btn btn-left" data-key="L"></button> <button class="btn btn-left" data-key="L"></button>
<button class="btn btn-ok" data-key="ENT"></button> <button class="btn btn-ok" data-key="ENT"></button>
@@ -244,6 +315,7 @@
<button class="btn btn-down" data-key="D"></button> <button class="btn btn-down" data-key="D"></button>
</div> </div>
<div class="action-btns"> <div class="action-btns">
<!-- 复归、返回按钮 -->
<button class="action-btn" data-key="RESET"> <button class="action-btn" data-key="RESET">
<span class="icon"></span> <span class="icon"></span>
<span>复归</span> <span>复归</span>
@@ -260,7 +332,7 @@
<div class="modal" id="connectModal"> <div class="modal" id="connectModal">
<div class="modal-content"> <div class="modal-content">
<h3>连接装置</h3> <h3>连接装置</h3>
<input type="text" id="hostInput" placeholder="装置 IP 地址" value="192.168.1.100"> <input type="text" id="hostInput" placeholder="装置 IP 地址" value="192.168.253.3">
<input type="number" id="portInput" placeholder="端口" value="7003"> <input type="number" id="portInput" placeholder="端口" value="7003">
<div class="btn-row"> <div class="btn-row">
<button class="btn-secondary" id="modalCancel">取消</button> <button class="btn-secondary" id="modalCancel">取消</button>
@@ -269,101 +341,134 @@
</div> </div>
</div> </div>
<script> <script>
/**
* 前端逻辑:通过 Socket.IO 与后端 WebSocket 通信。
* - connect_device: 连接装置,成功后后端持续推送 screen 事件
* - disconnect_device: 断开装置
* - key: 发送按键码
*/
// ========== 常量与 DOM 引用 ==========
// 按键名 -> RemoDispBus 协议码U/D/L/R 方向ENT 确认ESC 返回RESET 复归
const KEY_MAP = { U: 0x02, D: 0x40, L: 0x10, R: 0x08, ENT: 0x20, ESC: 0x01, RESET: 0x04 }; const KEY_MAP = { U: 0x02, D: 0x40, L: 0x10, R: 0x08, ENT: 0x20, ESC: 0x01, RESET: 0x04 };
let apiBase = '';
let refreshTimer = null;
const canvas = document.getElementById('screen'); const canvas = document.getElementById('screen');
// canvas 元素,用于绘制远程屏幕
const placeholder = document.getElementById('placeholder'); const placeholder = document.getElementById('placeholder');
// 占位提示文字
const connectBtn = document.getElementById('btnConnect'); const connectBtn = document.getElementById('btnConnect');
// 连接按钮
const connectModal = document.getElementById('connectModal'); const connectModal = document.getElementById('connectModal');
// 连接弹窗
const hostInput = document.getElementById('hostInput'); const hostInput = document.getElementById('hostInput');
// IP 输入框
const portInput = document.getElementById('portInput'); const portInput = document.getElementById('portInput');
// 端口输入框
const modalConnect = document.getElementById('modalConnect'); const modalConnect = document.getElementById('modalConnect');
// 弹窗内「连接」按钮
const modalCancel = document.getElementById('modalCancel'); const modalCancel = document.getElementById('modalCancel');
function showConnectModal() { // 弹窗内「取消」按钮
connectModal.classList.add('show');
} // ========== WebSocket 连接 ==========
function hideConnectModal() { const socket = io();
connectModal.classList.remove('show'); // 连接当前页面的 origin建立 Socket.IO 连接
}
connectBtn.onclick = showConnectModal; socket.on('connect', () => {});
modalCancel.onclick = hideConnectModal; // 连接成功时(可留空)
modalConnect.onclick = async () => { socket.on('connect_result', (data) => {
const host = hostInput.value.trim(); // 收到后端连接结果
const port = portInput.value || '7003'; if (data.success) {
try {
const r = await fetch(`/connect?host=${encodeURIComponent(host)}&port=${port}`);
const ok = await r.json();
if (ok.success) {
hideConnectModal(); hideConnectModal();
// 关闭弹窗
connectBtn.classList.add('connected'); connectBtn.classList.add('connected');
// 标记为已连接状态
connectBtn.querySelector('span:last-child').textContent = '已连接'; connectBtn.querySelector('span:last-child').textContent = '已连接';
apiBase = 'ok'; // 更新按钮文字
startRefresh();
} else { } else {
alert('连接失败: ' + (ok.error || '未知错误')); alert('连接失败: ' + (data.error || '未知错误'));
// 弹出错误提示
} }
} catch (e) { });
alert('连接失败,请先启动: python remo_disp_server.py'); // 服务端推送屏幕data.png 为 base64 编码的 PNG解码后绘制到 canvas
} socket.on('screen', (data) => {
}; if (!data.png) return;
async function sendKey(key) { // 无 base64 数据则跳过
if (!connectBtn.classList.contains('connected')) return; const binary = atob(data.png);
const code = KEY_MAP[key] ?? 0; // base64 解码为二进制字符串
await fetch(`/key?code=${code}`); const bytes = new Uint8Array(binary.length);
} for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
async function fetchScreen() { // 转为 Uint8Array
if (!connectBtn.classList.contains('connected')) return; const blob = new Blob([bytes], { type: 'image/png' });
try { // 创建 PNG Blob
const r = await fetch('/screen');
const ct = r.headers.get('Content-Type') || '';
const blob = await r.blob();
if (ct.includes('image/png')) {
const url = URL.createObjectURL(blob); const url = URL.createObjectURL(blob);
// 创建临时 URL
const img = new Image(); const img = new Image();
img.onload = () => { img.onload = () => {
// 图片加载完成后
canvas.width = img.width; canvas.width = img.width;
canvas.height = img.height; canvas.height = img.height;
const ctx = canvas.getContext('2d'); // 设置 canvas 尺寸
ctx.drawImage(img, 0, 0); canvas.getContext('2d').drawImage(img, 0, 0);
// 绘制到 canvas
canvas.style.display = 'block'; canvas.style.display = 'block';
placeholder.style.display = 'none'; placeholder.style.display = 'none';
// 显示 canvas隐藏占位符
URL.revokeObjectURL(url); URL.revokeObjectURL(url);
// 释放临时 URL
}; };
img.src = url; img.src = url;
} else { // 触发加载
const buf = await blob.arrayBuffer();
const data = new Uint8Array(buf);
const w = parseInt(r.headers.get('X-Width') || '160', 10);
const h = parseInt(r.headers.get('X-Height') || '160', 10);
canvas.width = w;
canvas.height = h;
const ctx = canvas.getContext('2d');
const id = ctx.createImageData(w, h);
for (let y = 0; y < h; y++)
for (let x = 0; x < w; x++) {
const bi = (y * w + x) >> 3, bit = 7 - (x & 7);
const v = (bi < data.length && (data[bi] >> bit) & 1) ? 255 : 0;
const i = (y * w + x) * 4;
id.data[i] = id.data[i+1] = id.data[i+2] = v;
id.data[i+3] = 255;
}
ctx.putImageData(id, 0, 0);
canvas.style.display = 'block';
placeholder.style.display = 'none';
}
} catch (e) {}
}
function startRefresh() {
fetchScreen();
if (refreshTimer) clearInterval(refreshTimer);
refreshTimer = setInterval(fetchScreen, 500);
}
document.querySelectorAll('.dpad .btn, .action-btn').forEach(btn => {
btn.onclick = () => sendKey(btn.dataset.key);
}); });
document.querySelector('.menu-item.exit').onclick = () => sendKey('ESC'); socket.on('disconnect_result', () => {});
// 收到断开结果(可留空)
function showConnectModal() { connectModal.classList.add('show'); }
// 显示连接弹窗
function hideConnectModal() { connectModal.classList.remove('show'); }
// 隐藏连接弹窗
connectBtn.onclick = showConnectModal;
// 点击连接按钮 -> 显示弹窗
modalCancel.onclick = hideConnectModal;
// 点击取消 -> 隐藏弹窗
modalConnect.onclick = () => {
// 点击弹窗内「连接」按钮
const host = hostInput.value.trim();
// 获取 IP去空格
const port = portInput.value || '7003';
// 获取端口,缺省 7003
socket.emit('connect_device', { host, port });
// 向后端发送连接请求
};
function sendKey(key) {
// 发送按键到后端
if (!connectBtn.classList.contains('connected')) return;
// 未连接则不发送
socket.emit('key', { code: KEY_MAP[key] ?? 0 });
// 根据按键名查协议码并发送
}
function doDisconnect() {
// 执行断开
socket.emit('disconnect_device');
// 通知后端断开设备
connectBtn.classList.remove('connected');
connectBtn.querySelector('span:last-child').textContent = '连接';
// 恢复按钮状态和文字
canvas.style.display = 'none';
placeholder.style.display = '';
placeholder.textContent = '点击「连接」连接装置';
// 隐藏 canvas显示占位符
}
document.querySelectorAll('.dpad .btn, .action-btn').forEach(btn => {
// 为所有方向键和动作按钮绑定点击
btn.onclick = () => sendKey(btn.dataset.key);
// 点击时发送对应按键码
});
document.querySelector('.menu-item.exit').onclick = doDisconnect;
// 断开按钮 -> 执行断开
document.getElementById('btnAbout').onclick = () => alert('远程显示工具\n与 RemoDispBus 协议兼容\n端口 7003'); document.getElementById('btnAbout').onclick = () => alert('远程显示工具\n与 RemoDispBus 协议兼容\n端口 7003');
// 关于按钮 -> 弹出说明
</script> </script>
</body> </body>
</html> </html>

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@@ -1,6 +1,8 @@
# 远程显示工具依赖 # 远程显示工具依赖
# 命令行工具 remo_disp_client.py 仅需 Python 标准库 # 命令行工具 remo_disp_client.py 仅需 Python 标准库
# Web 服务 remo_disp_server.py 需要 Flask # Web 服务 remo_disp_server.py 需要 Flask + flask-socketio
# 保存 PNG 需要 Pillow可选 # 保存 PNG 需要 Pillow可选
Flask>=2.0.0 Flask>=2.0.0
Pillow>=9.0.0 Pillow>=9.0.0
flask-socketio>=5.0.0
python-socketio>=5.0.0

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