init project

.gitignore

+.git
+.svn
+.hg
+.zip
+.gz
+.DS_Store
+.target
+.idea/
+target/
+dist/
+all-dependencies.txt
+self-modules.txt
+third-party-dependencies.txt
+.settings
+.nbproject
+.classpath
+.project
+*.iml
+*.ipr
+*.iws
+*.tgz
+.*.swp
+.vim
+.tmp
+node_modules
+npm-debug.log
+.vscode
+logs/*
+.mvn/
+.www
+t.*
+.factorypath
+Chart.lock
+yarn.lock
+package-lock.json
+config.gypi
+test/coverage
+
+# ------------------
+# pydolphinscheduler
+# ------------------
+# Cache
+__pycache__/
+
+# Build
+*egg-info/
+
+# Test coverage
+.coverage
+htmlcov/
\ No newline at end of file

app.js

+var createError = require('http-errors');
+var express = require('express');
+var path = require('path');
+var cookieParser = require('cookie-parser');
+var logger = require('morgan');
+
+var indexRouter = require('./routes/index');
+var usersRouter = require('./routes/users');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'ejs');
+
+app.use(logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/', indexRouter);
+app.use('/users', usersRouter);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  next(createError(404));
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = app;

bin/www

+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('markdown:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

db.js

+const dbConfig = {
+    user: 'postgres',        // 数据库用户名
+    password: '8GsysHlncMNn_8327383c6cda2b53', // 数据库密码
+    host: '10.82.14.147',           // 数据库主机地址
+    port: 5433, 
+}
+module.exports = dbConfig
\ No newline at end of file

package.json

+{
+  "name": "markdown",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www",
+    "pm2": "pm2 start --name ai-node npm -- run start"
+  },
+  "dependencies": {
+    "cookie-parser": "~1.4.4",
+    "debug": "~2.6.9",
+    "ejs": "~2.6.1",
+    "express": "~4.16.1",
+    "http-errors": "~1.6.3",
+    "markdown": "file:",
+    "morgan": "~1.9.1",
+    "mysql": "^2.18.1",
+    "pg": "^8.13.3"
+  }
+}

public/stylesheets/style.css

+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

routes/index.js

+var express = require('express');
+var router = express.Router();
+const mysql = require('mysql');
+const { Pool } = require('pg');
+const dbConfig = require('../db');
+
+/* GET home page. */
+router.get('/', function(req, res, next) {
+  res.render('index', { title: 'Express' });
+});
+
+// 链接postgresql数据库，并执行传入的SQL语句
+router.post('/execute-sql-pg', async (req, res) => {
+  const { sql, databaseName } = req.body;
+  // 禁止运行增/删/改语句
+  if (sql.toLowerCase().trim().startsWith('insert') ||
+      sql.toLowerCase().trim().startsWith('delete') ||
+      sql.toLowerCase().trim().startsWith('update')) {
+      res.json({ error: '你无权对数据库进行增删改操作' })
+  }
+
+  const pool = new Pool({
+    user: dbConfig.user,
+    password: dbConfig.password,
+    host: dbConfig.host,
+    port: dbConfig.port,
+    database: databaseName || 'dwd_infipark'
+  });
+
+  if (!sql) {
+    res.json({ error: 'No SQL query provided' })
+  }
+
+  try {
+    const result = await pool.query(sql);
+    res.json(result.rows); // 返回查询结果
+  } catch (err) {
+    console.error('Error executing SQL:', err);
+    res.json({ error: 'Error executing SQL: ' + err.message });
+  }
+  pool.end();
+  console.log('Postgresql connection closed');
+})
+
+// 动态根据关键字查询出匹配的字段名
+router.get('/get-10-top-list', async (req, res) => {
+  const { keyword, databaseName, tableName } = req.query;
+  if(!keyword) {
+    res.json({ error: 'No keyword provided' })
+  }
+  const client = new Pool({
+    user: dbConfig.user,
+    password: dbConfig.password,
+    host: dbConfig.host,
+    port: dbConfig.port,
+    database: databaseName || 'dwd_infipark'     // 数据库名称
+  });
+
+  try {
+    // 查询表的字段信息
+    const columnsQuery = `
+      SELECT column_name, data_type
+      FROM information_schema.columns
+      WHERE table_name = '${tableName}' AND table_schema = 'public'
+    `;
+    
+    const columnsResult = await client.query(columnsQuery);
+    const columns = columnsResult.rows;
+    
+    // 构造动态的 WHERE 子句
+    const conditions = columns
+      .filter((col) => col.data_type === 'text' || col.data_type === 'character varying' || col.data_type === 'varchar')
+      .map((col) => `${col.column_name} ILIKE $1`)
+      .join(' OR ');
+
+    if (conditions.length === 0) {
+      return res.status(400).send('表中没有可搜索的文本字段');
+    }
+
+    const query = `
+      SELECT *
+      FROM ${tableName}
+      WHERE ${conditions}
+      LIMIT 10
+    `;
+    const params = [`%${keyword}%`]; // 模糊匹配模式
+
+    // 执行查询
+    const result = await client.query(query, params);
+    res.json(result.rows);
+    client.end();
+  } catch (err) {
+    console.error('查询失败:', err);
+    res.status(500).send('查询失败');
+    client.end();
+  }
+})
+
+
+module.exports = router;

routes/users.js

+var express = require('express');
+var router = express.Router();
+
+/* GET users listing. */
+router.get('/', function(req, res, next) {
+  res.send('respond with a resource');
+});
+
+module.exports = router;

views/error.ejs

+<h1><%= message %></h1>
+<h2><%= error.status %></h2>
+<pre><%= error.stack %></pre>

views/index.ejs

+<!DOCTYPE html>
+<html>
+  <head>
+    <title><%= title %></title>
+    <link rel='stylesheet' href='/stylesheets/style.css' />
+  </head>
+  <body>
+    <h1><%= title %></h1>
+    <p>Welcome to <%= title %></p>
+  </body>
+</html>