Node.js解析路由的最小功能 [英] Node.js minimal function for parsing route

问题描述

我有一个正在运行的Node.js / Express应用，它接收到的路由如下：

I have a Node.js / Express app working, that receives routes like so:

app.get('/resource/:res', someFunction);
app.get('/foo/bar/:id', someOtherFunction);

这很棒，可以正常工作。

This is great and works fine.

我也在使用Socket.IO，并且希望一些服务器调用使用websocket而不是传统的RESTful调用。但是，我想使其非常干净并几乎使用相同的语法，最好：

I am also using Socket.IO, and want to have some server calls use websockets instead of traditional RESTful calls. However, I want to make it very clean and almost use the same syntax, preferrably:

app.sio.get('/resource/:res', someFunction);

这将为Socket.IO提供一个综合的 REST接口，从程序员的角度来看，他没有做任何不同的事情。只需从客户端标记 websockets：true 。

This will give a synthetic 'REST' interface to Socket.IO, where, from the programmer's perspective, he isn't doing anything different. Just flagging websockets: true from the client.

我可以处理所有详细信息，例如自定义方式传递请求动词并解析它们等等，我对此没有问题。我正在寻找的唯一的东西是一些函数，可以像Express一样解析路由，并正确地路由它们。例如，

I can deal with all the details, such as a custom way to pass in the request verbs and parse them and so and so, I don't have a problem with this. The only thing I am looking for is some function that can parse routes like express does, and route them properly. For example,

// I don't know how to read the ':bar',
'foo/:bar'

// Or handle all complex routings, such as
'foo/:bar/and/:so/on'

我可以深入挖掘并自己编写代码，或者尝试阅读所有express的源代码并找到他们在哪里做，但我确保它本身存在。只是不知道在哪里找到它。

I could dig in real deep and try to code this myself, or try to read through all of express' source code and find where they do it, but I am sure it exists by itself. Just don't know where to find it.

robertklep提供了一个很好的答案，这完全解决了这个问题为了我。我将其调整为完整的解决方案，并在下面的答案中发布。

robertklep provided a great answer which totally solved this for me. I adapted it into a full solution, which I posted in an answer below.

推荐答案

您可以使用Express路由器类来做繁重的工作：

You can use the Express router class to do the heavy lifting:

var io        = require('socket.io').listen(...);
var express   = require('express');
var sioRouter = new express.Router();

sioRouter.get('/foo/:bar', function(socket, params) {
  socket.emit('response', 'hello from /foo/' + params.bar);
});

io.sockets.on('connection', function(socket) {

  socket.on('GET', function(url) {
    // see if sioRouter has a route for this url:
    var route = sioRouter.match('GET', url);
    // if so, call its (first) callback (the route handler):
    if (route && route.callbacks.length) {
      route.callbacks[0](socket, route.params);
    }
  });

});

// client-side
var socket = io.connect();
socket.emit('GET', '/foo/helloworld');

您显然可以随请求传递额外的数据，并将其传递给路由处理程序（以及例如一个额外的参数。）

You can obviously pass in extra data with the request and pass that to your route handlers as well (as an extra parameter for example).

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