如何在Express中获取URL参数？

  • Z时代
  • 2024-01-10
  • 分类：问答

我在tagid从URL：获取值方面遇到问题localhost:8888/p?tagid=1234。

帮助我更正我的控制器代码。我无法获得tagid价值。

我的代码如下：

app.js：

var express = require('express'),
  http = require('http'),
  path = require('path');
var app = express();
var controller = require('./controller')({
  app: app
});
// all environments
app.configure(function() {
  app.set('port', process.env.PORT || 8888);
  app.use(express.json());
  app.use(express.urlencoded());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(path.join(__dirname, 'public')));
  app.set('view engine', 'jade');
  app.set('views', __dirname + '/views');
  app.use(app.router);
  app.get('/', function(req, res) {
    res.render('index');
  });
});
http.createServer(app).listen(app.get('port'), function() {
  console.log('Express server listening on port ' + app.get('port'));
});

Controller/index.js：

function controller(params) {
  var app = params.app;
  //var query_string = request.query.query_string;
  app.get('/p?tagId=/', function(request, response) {
    // userId is a parameter in the url request
    response.writeHead(200); // return 200 HTTP OK status
    response.end('You are looking for tagId' + request.route.query.tagId);
  });
}
module.exports = controller;

routes/index.js：

require('./controllers');
/*
 * GET home page.
 */
exports.index = function(req, res) {
  res.render('index', {
    title: 'Express'
  });
};

回答：

要获取URL参数的值，请使用req.params

app.get('/p/:tagId', function(req, res) {
  res.send("tagId is set to " + req.params.tagId);
});
// GET /p/5
// tagId is set to 5

如果要获取查询参数?tagId=5，请使用req.query

app.get('/p', function(req, res) {
  res.send("tagId is set to " + req.query.tagId);
});
// GET /p?tagId=5
// tagId is set to 5

URL参数

app.get('/p/:tagId', function(req, res) {
  res.send("tagId is set to " + req.param("tagId"));
});
// GET /p/5
// tagId is set to 5

查询参数

app.get('/p', function(req, res) {
  res.send("tagId is set to " + req.query("tagId"));
});
// GET /p?tagId=5
// tagId is set to 5

以上是 如何在Express中获取URL参数？ 的全部内容， 来源链接： utcz.com/qa/410643.html

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