| 1 | import * as fs from 'node:fs' |
| 2 | import path from 'node:path' |
| 3 | import axios, { AxiosResponse } from 'axios' |
| 4 | import { v4 as uuidv4 } from 'uuid' |
| 5 | |
| 6 | enum Type { |
| 7 | IMAGE = '图片', |
| 8 | TXT = '文档', |
| 9 | MUSIC = '音乐', |
| 10 | VIDEO = '视频', |
| 11 | OTHER = '其他', |
| 12 | } |
| 13 | |
| 14 | function getResponseHeader( |
| 15 | response: AxiosResponse<unknown>, |
| 16 | headerName: string, |
| 17 | ): string | undefined { |
| 18 | const value = response.headers[headerName] |
| 19 | |
| 20 | if (value == null) |
| 21 | return undefined |
| 22 | |
| 23 | if (Array.isArray(value)) |
| 24 | return value.join(', ') |
| 25 | |
| 26 | if (typeof value === 'string' || typeof value === 'number' || typeof value === 'boolean') |
| 27 | return String(value) |
| 28 | |
| 29 | return undefined |
| 30 | } |
| 31 | |
| 32 | export function getFileType(extName: string) { |
| 33 | const documents = 'txt doc pdf ppt pps xlsx xls docx' |
| 34 | const music = 'mp3 wav wma mpa ram ra aac aif m4a' |
| 35 | const video = 'avi mpg mpe mpeg asf wmv mov qt rm mp4 flv m4v webm ogv ogg' |
| 36 | const image |
| 37 | = 'bmp dib pcp dif wmf gif jpg tif eps psd cdr iff tga pcd mpt png jpeg' |
| 38 | if (image.includes(extName)) |
| 39 | return Type.IMAGE |
| 40 | |
| 41 | if (documents.includes(extName)) |
| 42 | return Type.TXT |
| 43 | |
| 44 | if (music.includes(extName)) |
| 45 | return Type.MUSIC |
| 46 | |
| 47 | if (video.includes(extName)) |
| 48 | return Type.VIDEO |
| 49 | |
| 50 | return Type.OTHER |
| 51 | } |
| 52 | |
| 53 | export function getName(fileName: string) { |
| 54 | if (fileName.includes('.')) |
| 55 | return fileName.split('.')[0] |
| 56 | |
| 57 | return fileName |
| 58 | } |
| 59 | |
| 60 | export function getExtname(fileName: string) { |
| 61 | return path.extname(fileName).replace('.', '') |
| 62 | } |
| 63 | |
| 64 | export function getSize(bytes: number, decimals = 2) { |
| 65 | if (bytes === 0) |
| 66 | return '0 Bytes' |
| 67 | |
| 68 | const k = 1024 |
| 69 | const dm = decimals < 0 ? 0 : decimals |
| 70 | const sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'] |
| 71 | |
| 72 | const i = Math.floor(Math.log(bytes) / Math.log(k)) |
| 73 | |
| 74 | return `${Number.parseFloat((bytes / k ** i).toFixed(dm))} ${sizes[i]}` |
| 75 | } |
| 76 | |
| 77 | export function saveFile(base64String: string, path: string, fileName: string) { |
| 78 | if (!fs.existsSync(path)) { |
| 79 | fs.mkdirSync(path, { recursive: true }) |
| 80 | } |
| 81 | |
| 82 | return new Promise((resolve, reject) => { |
| 83 | fs.writeFile(path + fileName, base64String, 'base64', (err) => { |
| 84 | if (err) { |
| 85 | reject(err) |
| 86 | } |
| 87 | else { |
| 88 | resolve(true) |
| 89 | } |
| 90 | }) |
| 91 | }) |
| 92 | } |
| 93 | |
| 94 | export async function urlToBlob(url: string): Promise<Blob> { |
| 95 | const response = await axios.get(url, { |
| 96 | responseType: 'arraybuffer', |
| 97 | }) |
| 98 | |
| 99 | return new Blob([response.data], { type: getResponseHeader(response, 'content-type') }) |
| 100 | } |
| 101 | |
| 102 | export async function fileUrlToBase64(url: string): Promise<string> { |
| 103 | try { |
| 104 | const response = await axios.get<ArrayBuffer>(url, { |
| 105 | responseType: 'arraybuffer', |
| 106 | }) |
| 107 | |
| 108 | return Buffer.from(response.data).toString('base64') |
| 109 | } |
| 110 | catch (error) { |
| 111 | throw new Error(`将URL转换为Base64错误: ${error}`) |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | export async function fileUrlToBlob(url: string): Promise<{ blob: Blob, fileName: string }> { |
| 116 | try { |
| 117 | const response = await axios.get<ArrayBuffer>(url, { |
| 118 | responseType: 'arraybuffer', |
| 119 | }) |
| 120 | |
| 121 | const contentType |
| 122 | = getResponseHeader(response, 'content-type') || 'application/octet-stream' |
| 123 | const blob = new Blob([response.data], { type: contentType }) |
| 124 | return { |
| 125 | blob, |
| 126 | fileName: url.split('/').pop() || '', |
| 127 | } |
| 128 | } |
| 129 | catch (error) { |
| 130 | throw new Error(`将URL转换为Blob错误: ${error}`) |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | export function getFileTypeFromUrl(url: string, newName = false): string { |
| 135 | const urlParts = url.split('.') |
| 136 | const extension = urlParts[urlParts.length - 1] |
| 137 | return newName ? `${uuidv4()}.${extension}` : extension |
| 138 | } |
| 139 | |
| 140 | export async function getFileSizeFromUrl(url: string): Promise<number> { |
| 141 | try { |
| 142 | const headResponse: AxiosResponse<unknown> = await axios.head(url) |
| 143 | const contentLength = Number.parseInt( |
| 144 | getResponseHeader(headResponse, 'content-length') || '', |
| 145 | 10, |
| 146 | ) |
| 147 | return contentLength |
| 148 | } |
| 149 | catch (error) { |
| 150 | throw new Error(`获取文件大小错误: ${error}`) |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | export async function chunkedDownloadFile( |
| 155 | url: string, |
| 156 | range: [number, number], |
| 157 | ): Promise<Buffer<ArrayBuffer>> { |
| 158 | try { |
| 159 | const chunk = await axios.get<ArrayBuffer>(url, { |
| 160 | responseType: 'arraybuffer', |
| 161 | headers: { |
| 162 | Range: `bytes=${range[0]}-${range[1]}`, |
| 163 | }, |
| 164 | }) |
| 165 | return Buffer.from(chunk.data) |
| 166 | } |
| 167 | catch (error) { |
| 168 | throw new Error(`Failed to download file chunk from ${url}: ${error}`) |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | export async function getRemoteFileSize(url: string): Promise<number> { |
| 173 | try { |
| 174 | const response = await axios.head(url) |
| 175 | if (!response.headers['content-length']) { |
| 176 | throw new Error('Content-Length header is missing') |
| 177 | } |
| 178 | const contentLength = Number.parseInt( |
| 179 | getResponseHeader(response, 'content-length') || '', |
| 180 | 10, |
| 181 | ) |
| 182 | return contentLength |
| 183 | } |
| 184 | catch (error) { |
| 185 | throw new Error(`Failed to get remote file metadata: ${error}, URL: ${url}`) |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | export async function probeRemoteFile(url: string): Promise<{ |
| 190 | finalUrl: string |
| 191 | contentType?: string |
| 192 | contentLength?: string |
| 193 | status: number |
| 194 | }> { |
| 195 | try { |
| 196 | const response = await axios.get<ArrayBuffer>(url, { |
| 197 | responseType: 'arraybuffer', |
| 198 | maxRedirects: 5, |
| 199 | headers: { |
| 200 | Range: 'bytes=0-0', |
| 201 | }, |
| 202 | validateStatus: () => true, |
| 203 | }) |
| 204 | |
| 205 | return { |
| 206 | finalUrl: response.request?.res?.responseUrl || url, |
| 207 | contentType: getResponseHeader(response, 'content-type'), |
| 208 | contentLength: getResponseHeader(response, 'content-length'), |
| 209 | status: response.status, |
| 210 | } |
| 211 | } |
| 212 | catch (error) { |
| 213 | throw new Error(`Failed to probe remote file: ${error}, URL: ${url}`) |
| 214 | } |
| 215 | } |
| 216 |