Question

我需要了解这行代码意味着什么

app.get("/users/:id", function(req, res){
         var data = userModel.find().where('username', req);
         res.send(data);
     });

我不理解的部分是＆＃34; / users /：id＆＃34;，特别是：id部分。 http请求的这种语法是什么意思？

Answer 1

Express uses the : to denote a variable in a route.
For example /user/42 will render a request for user id - 42
            /user/7  will render a request for user id - 7
but can be represented as a consistent form /users/:id
where id is the variable, : represents that whatever is after it is a 
variable, like here we have :id - id being the variable.

for reference check this out: http://expressjs.com/en/api.html

Answer 2

在上面的代码中，向/users/42发送GET请求会导致42存储在req.params.id。

基本上，:id告诉表明，路由声明中:id所在的请求URI中的任何内容都应解释为存储在req.params对象上，其属性名称为{{1 }}

你很可能想要更类似的东西：

id

http请求中的这种语法是什么意思？

2 个答案: