Question

我想使用express.js路由查询。当我没有指定参数时，它工作正常。也就是说在我的浏览器中输入'localhost：3000 / submissions'然后弹出我的提交页面。

这是代码：

constructor

但是，当我添加输入参数 -

时

app.get('/submissions', function(req, res){
    res.render('submissions');
});

它返回'无法获取/提交'。这是否是我将参数附加到输入（即'localhost：3000 / submissions：title = whatever'）。

有人能告诉我哪里出错了吗？

Answer 1

如果您将路线定义为/submission/:title，则其映射的网址如下：

http://localhost:3000/submissions/ASampleTitle

不

http://localhost:3000/submissions/:title=whatever
or
http://localhost:3000/submissions

请参阅快递＆＃39; routing document代表以下示例：

Route path: /users/:userId/books/:bookId
Request URL: http://localhost:3000/users/34/books/8989
req.params: { "userId": "34", "bookId": "8989" }

Answer 2

这里有各种类型的传递数据......

GET https://localhost:4730/countries  --> No data is passed

appHttps.get('/countries', function(req, res) {
    res.json({"countries":["India,China,USA,Canada,...."]} );
});

获取https://localhost:4730/states?country=india - ＆gt;查询参数传递

appHttps.get('/states', function(req, res) {
   console.log("Country passed is :"+req.query.country); //Consoles --> india
   res.json({"states":[TamilNadu,Kerala,......]});  
});

获取https://localhost:4730/capital/TamilNadu - ＆gt; req param传递

appHttps.get('/capital/:state', function(req, res) {
    console.log("State Passed is "+req.params.state);// consoles --> TamilNadu
    res.json({"state":"Chennai"});

}

POST https://localhost:4730/postData - ＆gt; req正文传递

req body {“name”：“nofi”}

appHttps.post('/postData', function(req, res) {
    console.log(req.body.name);// Consoles --> nofi
    res.json(req.body);
});

当我添加参数字段时，为什么我的express app.get调用不起作用？

2 个答案: