feat: node name

docs/en/install/README.md

@@ -298,6 +298,8 @@ Use environment variables is recommended to avoid conflicts during upgrade.
 
 `PROXY_URL_REGEX`: regex for url of enabling proxy, default to `.*`
 
+`NODE_NAME`: node name, used for load balancing, identify current node
+
 ### User Authentication
 
 Routes in `protected_route.js` will be protected using HTTP Basic Authentication.

docs/install/README.md

@@ -370,6 +370,8 @@ RSSHub 支持 `memory` 和 `redis` 两种缓存方式
 
 `LOGGER_LEVEL`: 指明输出到 console 和日志文件的日志的最大[等级](https://github.com/winstonjs/winston#logging-levels)，默认 `info`
 
+`NODE_NAME`: 节点名，用于负载均衡，识别当前节点
+
 ### 部分 RSS 模块配置
 
 -   pixiv 全部路由: [注册地址](https://accounts.pixiv.net/signup)

lib/config.js

@@ -34,6 +34,7 @@ module.exports = {
             password: process.env.REDIS_PASSWORD || null,
         },
     },
+    nodeName: process.env.NODE_NAME,
     pixiv: {
         client_id: 'MOBrBDS8blbauoSck0ZfDbtuzpyT',
         client_secret: 'lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj',

lib/middleware/header.js

@@ -6,6 +6,9 @@ const headers = {
     'Content-Type': 'application/xml; charset=utf-8',
     'Cache-Control': `public, max-age=${config.cache.routeExpire}`,
 };
+if (config.nodeName) {
+    headers['RSSHub-Node'] = config.nodeName;
+}
 
 module.exports = async (ctx, next) => {
     logger.info(`${ctx.url}, user IP: ${ctx.ips[0] || ctx.ip}`);

lib/routes/index.js

@@ -51,6 +51,12 @@ module.exports = async (ctx) => {
     ctx.body = art(path.resolve(__dirname, '../views/welcome.art'), {
         showDebug,
         debug: [
+            config.nodeName
+                ? {
+                      name: '节点名',
+                      value: config.nodeName,
+                  }
+                : null,
             {
                 name: 'git hash',
                 value: gitHash,

lib/views/welcome.art

@@ -26,7 +26,7 @@
         details {
             text-align: left;
             max-height: 400px;
-            overflow: scroll;
+            overflow: auto;
         }
 
         details::-webkit-scrollbar {
@@ -91,10 +91,12 @@
         <details>
             <summary>debug</summary>
             {{ each debug }}
+            {{ if $value }}
             <div class="debug-item">
                 <span class="debug-key">{{ $value.name }}: </span>
                 <span class="debug-value">{{@ $value.value }}</span>
             </div>
+            {{ /if }}
             {{ /each }}
         </details>
         {{ /if }}

test/middleware/debug.js

@@ -1,3 +1,5 @@
+process.env.NODE_NAME = 'mock';
+
 const supertest = require('supertest');
 const { server } = require('../../lib/index');
 const request = supertest(server);
@@ -34,6 +36,9 @@ describe('debug', () => {
                 .html()
                 .trim();
             switch (key) {
+                case '节点名:':
+                    expect(value).toBe('mock');
+                    break;
                 case 'git hash:':
                     expect(value).toBe(gitHash);
                     break;

test/middleware/header.js

@@ -1,3 +1,5 @@
+process.env.NODE_NAME = 'mock';
+
 const supertest = require('supertest');
 const { server } = require('../../lib/index');
 const request = supertest(server);
@@ -15,6 +17,6 @@ describe('header', () => {
         expect(response.headers['content-type']).toBe('application/xml; charset=utf-8');
         expect(response.headers['cache-control']).toBe(`public, max-age=${config.cache.routeExpire}`);
         expect(response.headers['last-modified']).toBe(response.text.match(/<lastBuildDate>(.*)<\/lastBuildDate>/)[1]);
-        // expect(response.headers.etag).toBe('"b37-MORyrF0tJ8BFw0xLLZL/zBYAFPY"');
+        expect(response.headers['rsshub-node']).toBe('mock');
     });
 });