# NestJS (/zh/quickstarts/nestjs)
Related: [Node.js](/zh/quickstarts/nodejs.md), [Next.js](/zh/quickstarts/nextjs.md), [Express](/zh/quickstarts/express.md), [Fastify](/zh/quickstarts/fastify.md), [Hono](/zh/quickstarts/hono.md), [Bun](/zh/quickstarts/bun.md)
## 前置条件 [#前置条件]
* NestJS 项目 (`@nestjs/cli`)
* 一个 Firecrawl API 密钥——[免费获取一个](https://www.firecrawl.dev/app/api-keys)
## 安装 SDK [#安装-sdk]
```bash
npm install firecrawl
```
将你的 API 密钥添加到 `.env` 文件中：
```bash
FIRECRAWL_API_KEY=fc-YOUR-API-KEY
```
## 创建 Firecrawl 服务 [#创建-firecrawl-服务]
创建 `src/firecrawl/firecrawl.service.ts`：
```typescript
import { Injectable } from "@nestjs/common";
import { Firecrawl } from "firecrawl";
@Injectable()
export class FirecrawlService {
private readonly client: Firecrawl;
constructor() {
this.client = new Firecrawl({ apiKey: process.env.FIRECRAWL_API_KEY });
}
async search(query: string, limit = 5) {
return this.client.search(query, { limit });
}
async scrape(url: string) {
return this.client.scrape(url);
}
async interact(url: string, prompts: string[]) {
const result = await this.client.scrape(url, { formats: ['markdown'] });
const scrapeId = result.metadata?.scrapeId;
const responses = [];
for (const prompt of prompts) {
const response = await this.client.interact(scrapeId, { prompt });
responses.push(response);
}
await this.client.stopInteraction(scrapeId);
return responses;
}
}
```
## 创建控制器 [#创建控制器]
新建 `src/firecrawl/firecrawl.controller.ts`：
```typescript
import { Body, Controller, Post } from "@nestjs/common";
import { FirecrawlService } from "./firecrawl.service";
@Controller("firecrawl")
export class FirecrawlController {
constructor(private readonly firecrawlService: FirecrawlService) {}
@Post("search")
async search(@Body("query") query: string) {
return this.firecrawlService.search(query);
}
@Post("scrape")
async scrape(@Body("url") url: string) {
return this.firecrawlService.scrape(url);
}
@Post("interact")
async interact(@Body("url") url: string, @Body("prompts") prompts: string[]) {
return this.firecrawlService.interact(url, prompts);
}
}
```
## 注册模块 [#注册模块]
创建 `src/firecrawl/firecrawl.module.ts`：
```typescript
import { Module } from "@nestjs/common";
import { FirecrawlService } from "./firecrawl.service";
import { FirecrawlController } from "./firecrawl.controller";
@Module({
providers: [FirecrawlService],
controllers: [FirecrawlController],
exports: [FirecrawlService],
})
export class FirecrawlModule {}
```
在 `AppModule` 中导入 `FirecrawlModule`。
## 试一试 [#试一试]
```bash
curl -X POST http://localhost:3000/firecrawl/search \
-H "Content-Type: application/json" \
-d '{"query": "firecrawl web scraping"}'
```
## 后续步骤 [#后续步骤]
所有 scrape 选项，包括 formats、actions 和代理设置
进行网页搜索并获取完整页面内容
点击、填写表单并提取动态内容
完整的 SDK 参考，涵盖爬取、map、batch scrape 等功能