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| 1 | +import axios from 'axios' |
| 2 | +import memoizeOne from 'memoize-one' |
| 3 | +import { SearchFunction, GetSrcPageFunction } from '../helpers' |
| 4 | +import { |
| 5 | + MachineTranslatePayload, |
| 6 | + MachineTranslateResult, |
| 7 | + getMTArgs |
| 8 | +} from '@/components/MachineTrans/engine' |
| 9 | +import { |
| 10 | + createLanguageHelper, |
| 11 | + emptyMachineResult, |
| 12 | + normalizeMachineLanguage, |
| 13 | + successMachineResult |
| 14 | +} from '../machine-custom' |
| 15 | +import { BingtransLanguage } from './config' |
| 16 | + |
| 17 | +// --------------------------------------------------------------------------- |
| 18 | +// Microsoft / Bing Translator via the keyless Edge auth endpoint. |
| 19 | +// |
| 20 | +// Flow: |
| 21 | +// 1. GET https://edge.microsoft.com/translate/auth → JWT token (~10 min) |
| 22 | +// 2. POST https://api-edge.cognitive.microsofttranslator.com/translate |
| 23 | +// ?api-version=3.0&to=<tl>[&from=<sl>] |
| 24 | +// Body: [{ "Text": "..." }] Header: Authorization: Bearer <token> |
| 25 | +// |
| 26 | +// The same endpoints power the Edge browser's built-in translator, so no API |
| 27 | +// key or account is required. |
| 28 | +// --------------------------------------------------------------------------- |
| 29 | + |
| 30 | +export const BING_AUTH_ENDPOINT = 'https://edge.microsoft.com/translate/auth' |
| 31 | + |
| 32 | +export const BING_TRANSLATE_ENDPOINT = |
| 33 | + 'https://api-edge.cognitive.microsofttranslator.com/translate' |
| 34 | + |
| 35 | +const SUPPORTED_LANGUAGES: ReadonlyArray<BingtransLanguage> = [ |
| 36 | + 'zh-CN', |
| 37 | + 'zh-TW', |
| 38 | + 'en', |
| 39 | + 'ja', |
| 40 | + 'ko', |
| 41 | + 'fr', |
| 42 | + 'de', |
| 43 | + 'es', |
| 44 | + 'ru', |
| 45 | + 'nl', |
| 46 | + 'pt' |
| 47 | +] |
| 48 | + |
| 49 | +/** |
| 50 | + * The auth token is valid for ~10 minutes. Cache it a little shorter so a |
| 51 | + * request never races the expiry, and avoid one auth round-trip per lookup. |
| 52 | + */ |
| 53 | +const AUTH_TOKEN_TTL = 8 * 60 * 1000 |
| 54 | + |
| 55 | +export const getTranslator = memoizeOne(() => |
| 56 | + createLanguageHelper<BingtransLanguage>(SUPPORTED_LANGUAGES) |
| 57 | +) |
| 58 | + |
| 59 | +export const getSrcPage: GetSrcPageFunction = (text, config, profile) => { |
| 60 | + const tl = profile.dicts.all.bingtrans.options.tl |
| 61 | + const lang = |
| 62 | + tl === 'default' |
| 63 | + ? config.langCode === 'zh-CN' |
| 64 | + ? 'zh-Hans' |
| 65 | + : config.langCode === 'zh-TW' |
| 66 | + ? 'zh-Hant' |
| 67 | + : 'en' |
| 68 | + : mapBingLanguage(tl) |
| 69 | + |
| 70 | + return `https://www.bing.com/translator/?from=auto&to=${lang}&text=${encodeURIComponent( |
| 71 | + text |
| 72 | + )}` |
| 73 | +} |
| 74 | + |
| 75 | +export type BingtransResult = MachineTranslateResult<'bingtrans'> |
| 76 | + |
| 77 | +/** Map Saladict / @opentranslate language codes → Microsoft Translator codes. */ |
| 78 | +export function mapBingLanguage(lang: string): string { |
| 79 | + switch (lang) { |
| 80 | + case 'zh-CN': |
| 81 | + return 'zh-Hans' |
| 82 | + case 'zh-TW': |
| 83 | + return 'zh-Hant' |
| 84 | + default: |
| 85 | + return lang |
| 86 | + } |
| 87 | +} |
| 88 | + |
| 89 | +export function buildBingTranslateParams(input: { |
| 90 | + sourceLanguage: string |
| 91 | + targetLanguage: string |
| 92 | +}): string { |
| 93 | + const params = new URLSearchParams() |
| 94 | + params.set('api-version', '3.0') |
| 95 | + params.set('to', mapBingLanguage(input.targetLanguage)) |
| 96 | + // Omitting `from` lets Microsoft auto-detect the source language. |
| 97 | + if (input.sourceLanguage && input.sourceLanguage !== 'auto') { |
| 98 | + params.set('from', mapBingLanguage(input.sourceLanguage)) |
| 99 | + } |
| 100 | + return params.toString() |
| 101 | +} |
| 102 | + |
| 103 | +export function parseBingTranslatedText( |
| 104 | + data: any |
| 105 | +): { |
| 106 | + translatedText: string |
| 107 | + detectedLanguage?: string |
| 108 | +} { |
| 109 | + const entry = Array.isArray(data) ? data[0] : undefined |
| 110 | + return { |
| 111 | + translatedText: entry?.translations?.[0]?.text || '', |
| 112 | + detectedLanguage: entry?.detectedLanguage?.language |
| 113 | + } |
| 114 | +} |
| 115 | + |
| 116 | +let cachedToken: { token: string; expiry: number } | null = null |
| 117 | + |
| 118 | +export function resetBingAuthToken(): void { |
| 119 | + cachedToken = null |
| 120 | +} |
| 121 | + |
| 122 | +async function getAuthToken(): Promise<string> { |
| 123 | + if (cachedToken && Date.now() < cachedToken.expiry) { |
| 124 | + return cachedToken.token |
| 125 | + } |
| 126 | + const response = await axios.get<string>(BING_AUTH_ENDPOINT, { |
| 127 | + responseType: 'text' |
| 128 | + }) |
| 129 | + const token = typeof response.data === 'string' ? response.data.trim() : '' |
| 130 | + cachedToken = { token, expiry: Date.now() + AUTH_TOKEN_TTL } |
| 131 | + return token |
| 132 | +} |
| 133 | + |
| 134 | +export const search: SearchFunction< |
| 135 | + BingtransResult, |
| 136 | + MachineTranslatePayload<BingtransLanguage> |
| 137 | +> = async (rawText, config, profile, payload) => { |
| 138 | + const translator = getTranslator() |
| 139 | + const langcodes = translator.getSupportLanguages() |
| 140 | + const { sl, tl, text } = await getMTArgs( |
| 141 | + translator as any, |
| 142 | + rawText, |
| 143 | + profile.dicts.all.bingtrans, |
| 144 | + config, |
| 145 | + payload |
| 146 | + ) |
| 147 | + const sourceLanguage = payload.sl || 'auto' |
| 148 | + |
| 149 | + try { |
| 150 | + const token = await getAuthToken() |
| 151 | + const response = await axios.post( |
| 152 | + `${BING_TRANSLATE_ENDPOINT}?${buildBingTranslateParams({ |
| 153 | + sourceLanguage, |
| 154 | + targetLanguage: tl |
| 155 | + })}`, |
| 156 | + [{ Text: text }], |
| 157 | + { |
| 158 | + headers: { |
| 159 | + Authorization: `Bearer ${token}`, |
| 160 | + 'Content-Type': 'application/json' |
| 161 | + } |
| 162 | + } |
| 163 | + ) |
| 164 | + const parsed = parseBingTranslatedText(response.data) |
| 165 | + if (!parsed.translatedText) { |
| 166 | + return emptyMachineResult('bingtrans', sl, tl, langcodes) |
| 167 | + } |
| 168 | + return successMachineResult({ |
| 169 | + id: 'bingtrans', |
| 170 | + sl: normalizeMachineLanguage(parsed.detectedLanguage || sourceLanguage), |
| 171 | + tl, |
| 172 | + slInitial: profile.dicts.all.bingtrans.options.slInitial, |
| 173 | + sourceText: text, |
| 174 | + translatedText: parsed.translatedText, |
| 175 | + langcodes |
| 176 | + }) |
| 177 | + } catch (e) { |
| 178 | + return emptyMachineResult('bingtrans', sl, tl, langcodes) |
| 179 | + } |
| 180 | +} |
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