Nginx反向代理部署网站与Node.js应用：重定向及静态文件问题

一、初始重定向错误情况 #

• 网站部署在https://mydomain.co.uk，表单依赖nodemailer，通过server.js与app.js处理表单数据
• 配置Nginx作为反向代理，mydomain.co.uk的server块配置如下：

location / {
    proxy_pass http://localhost:80;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
    # First attempt to serve request as file, then
    # as directory, then fall back to displaying a 404.
    # try_files $uri $uri/ =404;
}

• 访问时出现too many redirects错误，此前已通过certbot配置HTTPS，未配置反向代理时运行正常
• 使用pm2运行server.js，启动命令：pm2 start ecosystem.config.js --env production，ecosystem.config.js配置：

module.exports = {
  apps : [
      {
        name: "myserver",
        script: "server.js",
        watch: true,
        env: {
            "PORT": 3000,
            "NODE_ENV": "development"
        },
        env_production: {
            "PORT": 80,
            "NODE_ENV": "production",
        }
      }
  ]
}

二、调整后静态目录服务异常情况 #

后续调整了Nginx配置与server.js代码：

修改后的Nginx配置 #

location / {
    # First attempt to serve request as file, then
    # as directory, then fall back to displaying a 404.
    # try_files $uri $uri/ =404;
    proxy_pass http://localhost:8080;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_cache_bypass $http_upgrade;
    add_header X-Cache-Status $upstream_cache_status;
}

修改后的server.js代码片段 #

var path = require("path");
const express = require("express");
const app = express();

const nodemailer = require("nodemailer");

const PORT = process.env.PORT || 5500; // CHANGE TO WHATEVER
// middleware
var htmlPath = path.join(__dirname, "/html");
// app.use(express.static("public"));
app.use(express.static(htmlPath));
app.use(express.json());

当前反向代理功能正常，但Express仅能返回单个HTML文件，无法服务整个html目录，需解决如何配置让Express服务整个目录的问题。

内容的提问来源于stack exchange，提问作者Yenmangu