微信小程序接入百度翻译API

以前写了一个每日推送的英文小程序：brainyQuoteLite 有兴趣的小伙伴可以扫码体验一下。

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接入百度翻译API，首先你先注册一个开发者：

注册百度翻译开发者

然后选择你要的翻译服务，我的是通用翻译，你会有一个appid和key，请求API的时候需要对参数进行md5，后面会有例子。

备注：这个模板是网上找的。这里包装了一下异步的函数，这样就方便在别的地方调用了。

import md5 from './md5.js'

const appid = ''  //注册百度翻译api
const key = ''    //注册百度翻译api

function translate(q, from='en',to='zh') {
  // { from = 'auto', to = 'auto' } = { from: 'auto', to: 'auto' } 表示默认传递参数传递的值
  //Promise 对象
  return new Promise((resolve, reject) => {
    let salt = Date.now()  //随机数
    let sign = md5(`${appid}${q}${salt}${key}`)  //拼接 MD5进行加密
    wx.request({
      url: 'https://fanyi-api.baidu.com/api/trans/vip/translate',
      data: {
        q,  //待翻译文本
        from,  //待翻译的原始语言
        to,   //待翻译成的目标语言
      appid,
        salt,  //随机数
        sign   //拼接 MD5进行加密
      },
      success(res) {
        console.log(res)
        if (res.data && res.data.trans_result) {
          resolve(res.data)
        } else {
          reject({ status: 'error', msg: '翻译失败' })
          wx.showToast({
            title: '翻译失败',
            icon: 'none',
            duration: 3000
          })
        }
      },
      fail() {
        reject({ status: 'error', msg: '翻译失败' })
        wx.showToast({
          title: '网络异常',
          icon: 'none',
          duration: 3000
        })
      }
    })
  })
}
module.exports.translate = translate

md5.js

!function (n) { "use strict"; function t(n, t) { var r = (65535 & n) + (65535 & t); return (n >> 16) + (t >> 16) + (r >> 16) << 16 | 65535 & r } function r(n, t) { return n << t | n >>> 32 - t } function e(n, e, o, u, c, f) { return t(r(t(t(e, n), t(u, f)), c), o) } function o(n, t, r, o, u, c, f) { return e(t & r | ~t & o, n, t, u, c, f) } function u(n, t, r, o, u, c, f) { return e(t & o | r & ~o, n, t, u, c, f) } function c(n, t, r, o, u, c, f) { return e(t ^ r ^ o, n, t, u, c, f) } function f(n, t, r, o, u, c, f) { return e(r ^ (t | ~o), n, t, u, c, f) } function i(n, r) { n[r >> 5] |= 128 << r % 32, n[14 + (r + 64 >>> 9 << 4)] = r; var e, i, a, d, h, l = 1732584193, g = -271733879, v = -1732584194, m = 271733878; for (e = 0; e < n.length; e += 16)i = l, a = g, d = v, h = m, g = f(g = f(g = f(g = f(g = c(g = c(g = c(g = c(g = u(g = u(g = u(g = u(g = o(g = o(g = o(g = o(g, v = o(v, m = o(m, l = o(l, g, v, m, n[e], 7, -680876936), g, v, n[e + 1], 12, -389564586), l, g, n[e + 2], 17, 606105819), m, l, n[e + 3], 22, -1044525330), v = o(v, m = o(m, l = o(l, g, v, m, n[e + 4], 7, -176418897), g, v, n[e + 5], 12, 1200080426), l, g, n[e + 6], 17, -1473231341), m, l, n[e + 7], 22, -45705983), v = o(v, m = o(m, l = o(l, g, v, m, n[e + 8], 7, 1770035416), g, v, n[e + 9], 12, -1958414417), l, g, n[e + 10], 17, -42063), m, l, n[e + 11], 22, -1990404162), v = o(v, m = o(m, l = o(l, g, v, m, n[e + 12], 7, 1804603682), g, v, n[e + 13], 12, -40341101), l, g, n[e + 14], 17, -1502002290), m, l, n[e + 15], 22, 1236535329), v = u(v, m = u(m, l = u(l, g, v, m, n[e + 1], 5, -165796510), g, v, n[e + 6], 9, -1069501632), l, g, n[e + 11], 14, 643717713), m, l, n[e], 20, -373897302), v = u(v, m = u(m, l = u(l, g, v, m, n[e + 5], 5, -701558691), g, v, n[e + 10], 9, 38016083), l, g, n[e + 15], 14, -660478335), m, l, n[e + 4], 20, -405537848), v = u(v, m = u(m, l = u(l, g, v, m, n[e + 9], 5, 568446438), g, v, n[e + 14], 9, -1019803690), l, g, n[e + 3], 14, -187363961), m, l, n[e + 8], 20, 1163531501), v = u(v, m = u(m, l = u(l, g, v, m, n[e + 13], 5, -1444681467), g, v, n[e + 2], 9, -51403784), l, g, n[e + 7], 14, 1735328473), m, l, n[e + 12], 20, -1926607734), v = c(v, m = c(m, l = c(l, g, v, m, n[e + 5], 4, -378558), g, v, n[e + 8], 11, -2022574463), l, g, n[e + 11], 16, 1839030562), m, l, n[e + 14], 23, -35309556), v = c(v, m = c(m, l = c(l, g, v, m, n[e + 1], 4, -1530992060), g, v, n[e + 4], 11, 1272893353), l, g, n[e + 7], 16, -155497632), m, l, n[e + 10], 23, -1094730640), v = c(v, m = c(m, l = c(l, g, v, m, n[e + 13], 4, 681279174), g, v, n[e], 11, -358537222), l, g, n[e + 3], 16, -722521979), m, l, n[e + 6], 23, 76029189), v = c(v, m = c(m, l = c(l, g, v, m, n[e + 9], 4, -640364487), g, v, n[e + 12], 11, -421815835), l, g, n[e + 15], 16, 530742520), m, l, n[e + 2], 23, -995338651), v = f(v, m = f(m, l = f(l, g, v, m, n[e], 6, -198630844), g, v, n[e + 7], 10, 1126891415), l, g, n[e + 14], 15, -1416354905), m, l, n[e + 5], 21, -57434055), v = f(v, m = f(m, l = f(l, g, v, m, n[e + 12], 6, 1700485571), g, v, n[e + 3], 10, -1894986606), l, g, n[e + 10], 15, -1051523), m, l, n[e + 1], 21, -2054922799), v = f(v, m = f(m, l = f(l, g, v, m, n[e + 8], 6, 1873313359), g, v, n[e + 15], 10, -30611744), l, g, n[e + 6], 15, -1560198380), m, l, n[e + 13], 21, 1309151649), v = f(v, m = f(m, l = f(l, g, v, m, n[e + 4], 6, -145523070), g, v, n[e + 11], 10, -1120210379), l, g, n[e + 2], 15, 718787259), m, l, n[e + 9], 21, -343485551), l = t(l, i), g = t(g, a), v = t(v, d), m = t(m, h); return [l, g, v, m] } function a(n) { var t, r = "", e = 32 * n.length; for (t = 0; t < e; t += 8)r += String.fromCharCode(n[t >> 5] >>> t % 32 & 255); return r } function d(n) { var t, r = []; for (r[(n.length >> 2) - 1] = void 0, t = 0; t < r.length; t += 1)r[t] = 0; var e = 8 * n.length; for (t = 0; t < e; t += 8)r[t >> 5] |= (255 & n.charCodeAt(t / 8)) << t % 32; return r } function h(n) { return a(i(d(n), 8 * n.length)) } function l(n, t) { var r, e, o = d(n), u = [], c = []; for (u[15] = c[15] = void 0, o.length > 16 && (o = i(o, 8 * n.length)), r = 0; r < 16; r += 1)u[r] = 909522486 ^ o[r], c[r] = 1549556828 ^ o[r]; return e = i(u.concat(d(t)), 512 + 8 * t.length), a(i(c.concat(e), 640)) } function g(n) { var t, r, e = ""; for (r = 0; r < n.length; r += 1)t = n.charCodeAt(r), e += "0123456789abcdef".charAt(t >>> 4 & 15) + "0123456789abcdef".charAt(15 & t); return e } function v(n) { return unescape(encodeURIComponent(n)) } function m(n) { return h(v(n)) } function p(n) { return g(m(n)) } function s(n, t) { return l(v(n), v(t)) } function C(n, t) { return g(s(n, t)) } function A(n, t, r) { return t ? r ? s(t, n) : C(t, n) : r ? m(n) : p(n) } "function" == typeof define && define.amd ? define(function () { return A }) : "object" == typeof module && module.exports ? module.exports = A : n.md5 = A }(this);

调用

translate(xxx).then((res)=>{
           console.log(res);
           _this.setData({
             translate:res.trans_result[0].dst
           })
         }).catch((error)=>{
           console.log('tanslate error!')
           console.log(error)
         })

好了。