功能：新增对env环境变量的支持

.gitignore

@@ -17,3 +17,5 @@ node_modules/
 
 yarn.lock
 package-lock.json
+
+.env

example.env

@@ -0,0 +1,15 @@
+# 在使用此示例前，请先将文件名'example'去掉
+
+# 端口号
+# type: Number
+PORT=6119
+
+# 是否允许请求备选翻译
+# type: Boolean
+ALTERNATIVE=true
+
+# 跨域请求 (待完善)
+# type: Boolean String RegExp
+# 正则表达式请使用引号包裹。
+# 示例： '*'(允许任何) 或者 false(不允许)
+CORS.ORIGIN=false

package.json

@@ -1,6 +1,6 @@
 {
   "name": "deeplx-serverless",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "DeepL free API for Serverless",
   "type": "module",
   "main": "server.js",
@@ -18,8 +18,9 @@
     "translate",
     "serverless"
   ],
-  "license": "AGPLv3",
+  "license": "AGPL-3.0",
   "dependencies": {
+    "dotenv": "^16.4.5",
     "axios": "^1.6.3",
     "body-parser": "^1.20.2",
     "cors": "^2.8.5",

server.js

@@ -1,4 +1,5 @@
 import express from 'express';
+import 'dotenv/config';
 import cors from 'cors';
 import bodyParser from 'body-parser';
 import yargs from 'yargs/yargs';
@@ -10,20 +11,20 @@ const argv = yargs(hideBin(process.argv))
   .option('port', {
     alias: 'p',
     describe: '端口号',
-    coerce: coerce_port,
-    default: 9000
+    coerce: check_port,
+    default: Number(process.env.PORT) || 6119
   })
   .option('alt', {
     alias: 'a',
     describe: '请求备选翻译',
     type: 'boolean',
-    default: true
+    default: Boolean(process.env.ALTERNATIVE) || true
   })
   .option('cors', {
     alias: 'c',
     describe: '允许跨域访问的源(origin)',
-    coerce: coerce_cors,
-    default: false
+    coerce: check_cors,
+    default: process.env.CORS_ORIGIN || false
   })
   .help().alias('help', 'h')
   .argv;
@@ -108,20 +109,21 @@ async function get(req, res) {
   });
 };
 
-function coerce_cors(arg) {
+function check_cors(arg) {
+  if (arg === undefined) return;
   if (typeof arg === 'string' || typeof arg === 'boolean') {
     return arg;
   }
   console.error("ParamTypeError: \x1b[33m'"+arg+"'\x1b[31m, origin should be Boolean or String.\n\x1b[0meg: \x1b[32m'*' or true or RegExp");
   process.exit(1);
 }
 
-function coerce_port(arg) {
+function check_port(arg) {
   if (typeof arg === 'number' && !isNaN(arg) && Number.isInteger(arg) && arg >= 0 && arg <= 65535) {
     return arg;
   }
-  console.warn("WARNING:\x1b[0m port should be >= 0 and < 65536.\nUsed default value instead: 9000\n");
-  return 9000;
+  console.warn("WARNING:\x1b[0m port should be >= 0 and < 65536.\nUsed default value instead: 6119\n");
+  return 6119;
 }
 
 // 启动本地服务器

translate.js

@@ -2,7 +2,9 @@ import axios from 'axios';
 import lodash from 'lodash';
 
 const { random } = lodash;
-const DEEPL_BASE_URL = 'https://www2.deepl.com/jsonrpc';
+const DEEPL_BASE_URL = 'https://www2.deepl.com/jsonrpc',
+  DEEPL_PRO_URL = 'https://api.deepl.com',
+  DEEPL_FREE_URL = 'https://api-free.deepl.com';
 const headers = {
   'Content-Type': 'application/json',
   Accept: '*/*',
@@ -34,6 +36,14 @@ function getTimestamp(iCount) {
   return ts - (ts % iCount) + iCount;
 }
 
+/**
+ * @param {string} text - 待翻译的文本
+ * @param {string} [sourceLang='AUTO'] - 源语言国家/地区代号 默认自动识别
+ * @param {string} targetLang - 目标语言国家/地区代号
+ * @param {number} [alternativeCount] - 请求的备选翻译数量
+ * @param {boolean} [printResult] - 控制台打印返回结果
+ * @returns {object} 一般情况下返回JSON格式对象
+ */
 async function translate(
   text = 'Error: The original text cannot be empty!',
   sourceLang = 'AUTO',