更新目录
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网络/README.md
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网络/README.md
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# 网络练习例子
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# 网络
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### [Python3.4.4 or Python3.5][PyQt5]
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## [1、控制小车](控制小车/)
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通过TCP连接树莓派控制小车的简单例子
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### [1.TcpSocket](TcpSocket/)
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需求:
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- 通过TCP连接到树莓派控制小车前后左右
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- 前进:0-100, 发送命令为F:2
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- 后退:0-100, 发送命令为B:2
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- 向左:32-42, 发送命令为L:2
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- 向右:42-52, 发送命令为R:2
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注意:
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- 这里只用了UI文件做界面,并没有转换为python代码
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- server.py只是做个本地echo服务器用来测试命令是否正常,依赖`tornado`库,可以通过`pip install tornado`来安装
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- 另外需要做粘包处理,以(\n)作为粘包符
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- 由于wifi能力不行,发送图片要尽量小
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说明:
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- `QTcpSocket.connected` 服务连接成功后触发该信号
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- `QTcpSocket.disconnected` 服务器丢失连接触发该信号
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- `QTcpSocket.readyRead` 服务器返回数据触发该信号
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- `QTcpSocket.error` 连接报错触发该信号(连接超时、服务器断开等等)
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<font color="red">目前暂未修复接收图片异,原因在于`readyRead`中没有判断数据长度进行多次接收(类似粘包处理)</font>
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![截图](控制小车/ScreenShot/控制小车.png)
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## [2、窗口配合异步Http](窗口配合异步Http/)
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`asyncio`结合PyQt例子
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1. 依赖库:
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1. `quamash`(对QT事件循环的封装替换):https://github.com/harvimt/quamash
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2. `asyncio`:https://docs.python.org/3/library/asyncio.html
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3. `aiohttp`:https://aiohttp.readthedocs.io/en/stable/
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2. 在创建`QApplication`后随即设置替换事件循环loop
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```python
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app = QApplication(sys.argv)
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loop = QEventLoop(app)
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asyncio.set_event_loop(loop)
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w = Window()
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```
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3. 通过`asyncio.ensure_future(函数(), loop=loop)`来执行某个异步函数
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Window →→ initSession(初始化session)
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↓
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↓
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下载按钮 →→ doDownload(执行_doDownload方法)
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↓
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↓
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session.get(下载json数据进行解析)
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↓
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↓
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添加到界面 ←← _doDownloadImage(对单张图片进行下载)
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![截图](窗口配合异步Http/ScreenShot/窗口配合异步Http.gif)
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@ -1,26 +0,0 @@
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# 通过TCP连接树莓派控制小车的简单例子
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需求:
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- 通过TCP连接到树莓派控制小车前后左右
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- 前进:0-100, 发送命令为F:2
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- 后退:0-100, 发送命令为B:2
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- 向左:32-42, 发送命令为L:2
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- 向右:42-52, 发送命令为R:2
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注意:
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- 这里只用了UI文件做界面,并没有转换为python代码
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- server.py只是做个本地echo服务器用来测试命令是否正常,依赖tornado库,可以通过pip install tornado来安装
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- 另外需要做粘包处理,以(\n)作为粘包符
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- 由于wifi能力不行,发送图片要尽量小
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说明:
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- QTcpSocket.connected 服务连接成功后触发该信号
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- QTcpSocket.disconnected 服务器丢失连接触发该信号
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- QTcpSocket.readyRead 服务器返回数据触发该信号
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- QTcpSocket.error 连接报错触发该信号(连接超时、服务器断开等等)
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## 截图
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![截图](ScreenShot/1.png)
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Before Width: | Height: | Size: 25 KiB After Width: | Height: | Size: 25 KiB |
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@ -1,32 +0,0 @@
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# asyncio结合PyQt例子
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### [Python3.5][PyQt5]
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依赖库:<br/>
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quamash(对QT事件循环的封装替换):https://github.com/harvimt/quamash<br/>
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asyncio:https://docs.python.org/3/library/asyncio.html<br/>
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aiohttp:https://aiohttp.readthedocs.io/en/stable/<br/>
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1、在创建QApplication后随即设置替换事件循环loop
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```python
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app = QApplication(sys.argv)
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loop = QEventLoop(app)
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asyncio.set_event_loop(loop)
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w = Window()
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```
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2、通过asyncio.ensure_future(函数(), loop=loop)来执行某个异步函数
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Window →→ initSession(初始化session)<br/>
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↓<br/>
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↓<br/>
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下载按钮 →→ doDownload(执行_doDownload方法)<br/>
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↓<br/>
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↓<br/>
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session.get(下载json数据进行解析)<br/>
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↓<br/>
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↓<br/>
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添加到界面 ←← _doDownloadImage(对单张图片进行下载)
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# 截图
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![截图1](ScreenShot/1.gif)
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Before Width: | Height: | Size: 3.2 MiB After Width: | Height: | Size: 3.2 MiB |
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