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1 |
| -# x-crawl |
| 1 | +# <div id="en">x-crawl</div> |
2 | 2 |
|
3 |
| -XCrawl is a Nodejs multifunctional crawler library, which can crawl HTML, JSON or files in batches by providing configuration. |
| 3 | +English | <a href="#cn" style="text-decoration: none">简体中文</a> |
4 | 4 |
|
5 |
| -XCrawl 是 Nodejs 多功能爬虫库,提供配置即可批量抓取 HTML 、JSON 或文件。 |
| 5 | +Crawl is a Nodejs multifunctional crawler library. Provide configuration to batch fetch HTML, JSON, images, etc. |
| 6 | + |
| 7 | +--- |
| 8 | + |
| 9 | + |
| 10 | +# <div id="cn">x-crawl</div> |
| 11 | + |
| 12 | +<a href="#en" style="text-decoration: none">English</a> | 简体中文 |
| 13 | + |
| 14 | +Crawl 是 Nodejs 多功能爬虫库。提供配置即可批量抓取 HTML 、JSON、图片等等。 |
| 15 | + |
| 16 | +## 安装 |
| 17 | + |
| 18 | +以 NPM 为例: |
| 19 | + |
| 20 | +```shell |
| 21 | +npm install x-crawl |
| 22 | +```` |
| 23 | + |
| 24 | +## 示例 |
| 25 | + |
| 26 | +获取 https://docs.github.com/zh/get-started 的标题为例: |
| 27 | + |
| 28 | +```js |
| 29 | +// 导入模块 ES/CJS |
| 30 | +import XCrawl from 'x-crawl' |
| 31 | +
|
| 32 | +// 创建一个爬虫实例 |
| 33 | +const docsXCrawl = new XCrawl({ |
| 34 | + baseUrl: 'https://docs.github.com', |
| 35 | + timeout: 10000, |
| 36 | + intervalTime: { max: 2000, min: 1000 } |
| 37 | +}) |
| 38 | +
|
| 39 | +// 调用 fetchHTML API 爬取 |
| 40 | +docsXCrawl.fetchHTML('/zh/get-started').then((jsdom) => { |
| 41 | + console.log(jsdom.window.document.querySelector('title')?.textContent) |
| 42 | +}) |
| 43 | +``` |
| 44 | +
|
| 45 | +## 核心概念 |
| 46 | +
|
| 47 | +### XCrawl |
| 48 | +
|
| 49 | +通过 new XCrawl 创建一个爬虫实例。 |
| 50 | +
|
| 51 | +* 类型 |
| 52 | +
|
| 53 | +```ts |
| 54 | +class XCrawl { |
| 55 | + private readonly baseConfig |
| 56 | + constructor(baseConfig?: IXCrawlBaseConifg) |
| 57 | + fetch<T = any>(config: IFetchConfig): Promise<T> |
| 58 | + fetchFile(config: IFetchFileConfig): Promise<IFetchFile> |
| 59 | + fetchHTML(url: string): Promise<JSDOM> |
| 60 | +} |
| 61 | +``` |
| 62 | +
|
| 63 | +* <div id="myXCrawl" style="text-decoration: none">示例</div> |
| 64 | +
|
| 65 | +myXCrawl 为后面示例的爬虫实例。 |
| 66 | +
|
| 67 | +```js |
| 68 | +const myXCrawl = new XCrawl({ |
| 69 | + baseUrl: 'https://xxx.com', |
| 70 | + timeout: 10000, |
| 71 | + // 相当于默认值, 下次请求的间隔时间, 多个请求才有效 |
| 72 | + intervalTime: { |
| 73 | + max: 2000, |
| 74 | + min: 1000 |
| 75 | + } |
| 76 | +}) |
| 77 | +``` |
| 78 | +
|
| 79 | +### fetch |
| 80 | +
|
| 81 | +fetch 是上面 <a href="#myXCrawl" style="text-decoration: none">myXCrawl</a> 实例的方法,通常用于爬取 API ,可获取 JSON 数据等等。 |
| 82 | +
|
| 83 | +* 类型 |
| 84 | +
|
| 85 | +```ts |
| 86 | +function fetch<T = any>(config: IFetchConfig): Promise<T> |
| 87 | +``` |
| 88 | +
|
| 89 | +* 示例 |
| 90 | +
|
| 91 | +```js |
| 92 | +const requestConifg = [ |
| 93 | + { url: '/xxxx', method: 'GET' }, |
| 94 | + { url: '/xxxx', method: 'GET' }, |
| 95 | + { url: '/xxxx', method: 'GET' } |
| 96 | +] |
| 97 | +
|
| 98 | +myXCrawl.fetch({ |
| 99 | + requestConifg, // 请求配置, 可以是 Array | Object |
| 100 | + intervalTime: 800 // 下次请求的间隔时间, 多个请求才有效 |
| 101 | +}).then(res => { |
| 102 | + console.log(res) |
| 103 | +}) |
| 104 | +``` |
| 105 | +
|
| 106 | +### fetchFile |
| 107 | +
|
| 108 | +fetchFile 是上面 <a href="#myXCrawl" style="text-decoration: none">myXCrawl</a> 实例的方法,通常用于爬取文件,可获取图片、pdf 文件等等。 |
| 109 | +
|
| 110 | +* 类型 |
| 111 | +
|
| 112 | +```ts |
| 113 | +function fetchFile(config: IFetchFileConfig): Promise<IFetchFile> |
| 114 | +``` |
| 115 | +
|
| 116 | +* 示例 |
| 117 | +
|
| 118 | +```js |
| 119 | +const requestConifg = [ |
| 120 | + { url: '/xxxx', method: 'GET' }, |
| 121 | + { url: '/xxxx', method: 'GET' }, |
| 122 | + { url: '/xxxx', method: 'GET' } |
| 123 | +] |
| 124 | +
|
| 125 | +myXCrawl.fetchFile({ |
| 126 | + requestConifg, // 请求配置, 可以是 Array | Object |
| 127 | + fileConfig: { |
| 128 | + storeDir: path.resolve(__dirname, './upload') // 存放文件夹 |
| 129 | + } |
| 130 | +}).then(fileInfos => { |
| 131 | + console.log(fileInfos) |
| 132 | +}) |
| 133 | +``` |
| 134 | +
|
| 135 | +### fetchHTML |
| 136 | +
|
| 137 | +fetchHTML 是上面 <a href="#myXCrawl" style="text-decoration: none">myXCrawl</a> 实例的方法,通常用于爬取 HTML 。 |
| 138 | +
|
| 139 | +* 类型 |
| 140 | +
|
| 141 | +```ts |
| 142 | +function fetchHTML(url: string): Promise<JSDOM> |
| 143 | +``` |
| 144 | +
|
| 145 | +* 示例 |
| 146 | +
|
| 147 | +```js |
| 148 | +myXCrawl.fetchHTML('/xxx').then((jsdom) => { |
| 149 | + console.log(jsdom.window.document.querySelector('title')?.textContent) |
| 150 | +}) |
| 151 | +``` |
| 152 | +
|
| 153 | +## 类型 |
| 154 | +
|
| 155 | +* IAnyObject |
| 156 | +
|
| 157 | +```ts |
| 158 | +interface IAnyObject extends Object { |
| 159 | + [key: string | number | symbol]: any |
| 160 | +} |
| 161 | +``` |
| 162 | +
|
| 163 | +* IMethod |
| 164 | +
|
| 165 | +```ts |
| 166 | +export type IMethod = 'get' | 'GET' | 'delete' | 'DELETE' | 'head' | 'HEAD' | 'options' | 'OPTIONS' | 'post' | 'POST' | 'put' | 'PUT' | 'patch' | 'PATCH' | 'purge' | 'PURGE' | 'link' | 'LINK' | 'unlink' | 'UNLINK' |
| 167 | +``` |
| 168 | +
|
| 169 | +* IRequestConfig |
| 170 | +
|
| 171 | +```ts |
| 172 | +export interface IRequestConfig { |
| 173 | + url: string |
| 174 | + method?: IMethod |
| 175 | + headers?: IAnyObject |
| 176 | + params?: IAnyObject |
| 177 | + data?: any |
| 178 | + timeout?: number |
| 179 | +} |
| 180 | +``` |
| 181 | +
|
| 182 | +* IIntervalTime |
| 183 | +
|
| 184 | +```ts |
| 185 | +type IIntervalTime = number | { |
| 186 | + max: number |
| 187 | + min?: number |
| 188 | +} |
| 189 | +``` |
| 190 | +
|
| 191 | +* IFetchBaseConifg |
| 192 | +
|
| 193 | +```ts |
| 194 | +interface IFetchBaseConifg { |
| 195 | + requestConifg: IRequestConfig | IRequestConfig[] |
| 196 | + intervalTime?: IIntervalTime |
| 197 | +} |
| 198 | +``` |
| 199 | +
|
| 200 | +* IFetchFile |
| 201 | +
|
| 202 | +```ts |
| 203 | + type IFetchFile = { |
| 204 | + fileName: string |
| 205 | + mimeType: string |
| 206 | + size: number |
| 207 | + filePath: string |
| 208 | +}[] |
| 209 | +``` |
| 210 | +
|
| 211 | +* IXCrawlBaseConifg |
| 212 | +
|
| 213 | +```ts |
| 214 | +interface IXCrawlBaseConifg { |
| 215 | + baseUrl?: string |
| 216 | + timeout?: number |
| 217 | + intervalTime?: IIntervalTime |
| 218 | +} |
| 219 | +``` |
| 220 | +
|
| 221 | +* IFetchConfig |
| 222 | +
|
| 223 | +```ts |
| 224 | +interface IFetchConfig extends IFetchBaseConifg { |
| 225 | +} |
| 226 | +``` |
| 227 | +
|
| 228 | +* IFetchFileConfig |
| 229 | +
|
| 230 | +```ts |
| 231 | +interface IFetchFileConfig extends IFetchBaseConifg { |
| 232 | + fileConfig: { |
| 233 | + storeDir: string |
| 234 | + } |
| 235 | +} |
| 236 | +``` |
| 237 | +
|
| 238 | +## 更多 |
| 239 | +
|
| 240 | +如有 **问题** 或 **需求** 请在 https://github.com/coder-hxl/x-crawl 中提 **Issues** 。 |
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