CDPSession

CDPSession 实例用于讨论原始 Chrome Devtools 协议：

¥The CDPSession instances are used to talk raw Chrome Devtools Protocol:

• 协议方法可以通过 session.send 方法调用。

  ¥protocol methods can be called with session.send method.

• 可以使用 session.on 方法订阅协议事件。

  ¥protocol events can be subscribed to with session.on method.

有用的链接：

¥Useful links:

• 有关 DevTools 协议的文档可以在这里找到：DevTools 协议查看器。

  ¥Documentation on DevTools Protocol can be found here: DevTools Protocol Viewer.

• DevTools 协议入门：https://github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md

  ¥Getting Started with DevTools Protocol: https://github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md

var client = await Page.Context.NewCDPSessionAsync(Page);
await client.SendAsync("Runtime.enable");
client.Event("Animation.animationCreated").OnEvent += (_, _) => Console.WriteLine("Animation created!");
var response = await client.SendAsync("Animation.getPlaybackRate");
var playbackRate = response.Value.GetProperty("playbackRate").GetDouble();
Console.WriteLine("playback rate is " + playbackRate);
await client.SendAsync("Animation.setPlaybackRate", new() { { "playbackRate", playbackRate / 2 } });

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方法

¥Methods

DetachAsync

Added before v1.9 cdpSession.DetachAsync

从目标分离 CDPSession。一旦分离，CDPSession 对象将不会触发任何事件，也不能用于发送消息。

¥Detaches the CDPSession from the target. Once detached, the CDPSession object won't emit any events and can't be used to send messages.

用法

¥Usage

await CdpSession.DetachAsync();

返回

¥Returns

• void#

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事件

¥Event

Added in: v.1.30 cdpSession.Event

返回给定 CDP 事件名称的事件触发器。

¥Returns an event emitter for the given CDP event name.

用法

¥Usage

CdpSession.Event(eventName);

参数

¥Arguments

• eventName string Added in: v1.30#

CDP 事件名称。

¥CDP event name.

返回

¥Returns

• CDPSessionEvent#

---

SendAsync

Added before v1.9 cdpSession.SendAsync

用法

¥Usage

await CdpSession.SendAsync(method, params);

参数

¥Arguments

• method string#

协议方法名称。

¥Protocol method name.

• args [Map]?<string, Args> (optional) Added in: v1.30#

可选方法参数。

¥Optional method parameters.

返回

¥Returns

• [JsonElement?]#