browserless提供了hooks 能力，默认实现都为空，以下简单说明下内部处理
默认实现
如下图
内部处理
- hooks.ts 定义
import {
AfterResponse,
BeforeRequest,
BrowserHook,
PageHook,
} from '@browserless.io/browserless';
import { EventEmitter } from 'events';
// KEPT for backwards compatibility reasons since some downstream
// docker images will override these files to inject their own hook
// behaviors
// @ts-ignore
import { default as afterRequest } from '../external/after.js';
// @ts-ignore
import { default as beforeRequest } from '../external/before.js';
// @ts-ignore
import { default as browserHook } from '../external/browser.js';
// @ts-ignore
import { default as pageHook } from '../external/page.js';
export class Hooks extends EventEmitter {
before(args: BeforeRequest): Promise<boolean> {
return beforeRequest(args);
}
after(args: AfterResponse): Promise<unknown> {
return afterRequest(args);
}
page(args: PageHook): Promise<unknown> {
return pageHook(args);
}
browser(args: BrowserHook): Promise<unknown> {
return browserHook(args);
}
/**
* Implement any browserless-core-specific shutdown logic here.
* Calls the empty-SDK stop method for downstream implementations.
*/
public shutdown = async () => {
await this.stop();
};
/**
* Left blank for downstream SDK modules to optionally implement.
*/
public stop = () => {};
}
- 使用
如下图，可以看到不少地方都有使用到，核心就是对于几个hooks 的调用
说明
默认hooks 是放在external 文件夹中的几个文件，如果我们希望自己扩展，就可以重写几个实现，对于基于docker 部署的，直接进行文件替换
参考资料
src/hooks.ts
https://docs.browserless.io/
https://github.com/browserless/browserless