CDPSession

• 继承自: EventEmitter

CDPSession 用于直接与 Chrome DevTools 协议通信：

• 通过 session.send 调用协议方法；
• 通过 session.on 订阅协议事件。

参考资料：

• DevTools 协议文档：DevTools Protocol Viewer
• 入门指南：https://github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md

Sync

client = page.context.new_cdp_session(page)
client.send("Animation.enable")
client.on("Animation.animationCreated", lambda: print("animation created!"))
response = client.send("Animation.getPlaybackRate")
print("playback rate is " + str(response["playbackRate"]))
client.send("Animation.setPlaybackRate", {
    playbackRate: response["playbackRate"] / 2
})

Async

client = await page.context.new_cdp_session(page)
await client.send("Animation.enable")
client.on("Animation.animationCreated", lambda: print("animation created!"))
response = await client.send("Animation.getPlaybackRate")
print("playback rate is " + str(response["playbackRate"]))
await client.send("Animation.setPlaybackRate", {
    playbackRate: response["playbackRate"] / 2
})

• cdp_session.detach()
• cdp_session.send(method, **kwargs)

cdp_session.detach()

Added in: v1.8

• 返回值: <NoneType>#

从目标上分离该 CDPSession。分离后对象不再触发事件，也无法发送消息。

cdp_session.send(method, **kwargs)

Added in: v1.8

• method <str> 协议方法名。#
• params <Dict> 可选的方法参数。#
• 返回值: <Dict>#