chore: compatibility with older yuque client (without token)

Author: x-cold

README.md

@@ -30,7 +30,7 @@ A downloader for articles from yuque
 
 ## Config
 
-如果你的知识库是私有的，请使用环境变量注入 Token 信息，在语雀上点击个人头像->设置—> Token 即可获取。
+如果你的知识库是私有的，请使用环境变量 (YUQUE_TOKEN=xxx) 注入 Token 信息，在语雀上点击个人头像->设置—> Token 即可获取。
 
 > package.json
 

lib/yuque.js

@@ -1,6 +1,8 @@
 'use strict';
 
 const SDK = require('@yuque/sdk');
+const deprecate = require('depd')('yuque-hexo');
+
 
 function handler(res) {
   // should handler error yourself
@@ -16,9 +18,65 @@ function handler(res) {
   return res.data;
 }
 
+'use strict';
+
+const urllib = require('urllib');
+const debug = require('debug')('yuque-hexo:client');
+
+/**
+ * doesn't support token
+ */
+class AnonymousYuqueClient {
+  constructor(config) {
+    const { baseUrl, login, repo } = config;
+    this.config = Object.assign({}, config);
+    this.config.namespace = `${login}/${repo}`;
+    debug(`create client: baseUrl: ${baseUrl}, login: ${login}, repo: ${repo}`);
+  }
+
+  async _fetch(method, api, data) {
+    const { baseUrl, namespace, timeout = 30000 } = this.config;
+    const path = `${baseUrl}/repos/${namespace}${api}`;
+    debug(`request data: api: ${path}, data: ${data}`);
+    try {
+      const result = await urllib.request(path, {
+        dataType: 'json',
+        method,
+        data,
+        timeout,
+      });
+      return result.data;
+    } catch (error) {
+      throw new Error(`请求数据失败: ${error.message}`);
+    }
+  }
+
+  async getArticles() {
+    const api = '/docs';
+    const result = await this._fetch('GET', api);
+    return result;
+  }
+
+  async getArticle(slug) {
+    const api = `/docs/${slug}?raw=true`;
+    const result = await this._fetch('GET', api);
+    return result;
+  }
+
+  // async getToc() {
+  //   const api = '/toc';
+  //   const result = await this._fetch('GET', api);
+  //   return result;
+  // }
+}
+
 class YuqueClient extends SDK {
   constructor(config) {
     const { baseUrl, login, repo, token } = config;
+    if (!token) {
+      deprecate('TOKEN of yuque will be required while verion >v1.6.0.');
+      return new AnonymousYuqueClient(config);
+    }
     const endpoint = baseUrl.endsWith('/') ? baseUrl : `${baseUrl}/`;
     const superConfig = {
       endpoint,

package.json

@@ -29,6 +29,7 @@
     "chalk": "^2.4.1",
     "common-bin": "^2.7.3",
     "debug": "^3.1.0",
+    "depd": "^2.0.0",
     "ejs": "^2.6.1",
     "hexo-front-matter": "^0.2.3",
     "html-entities": "^1.2.1",