Question

我正在使用 Express 3.x ，当我放

时

express = require("express")
routes = require("./routes")
http = require("http")
path = require("path")
app = express()
app.configure ->
    app.set "port", process.env.PORT or 3000
    app.set "views", __dirname + "/views"
    app.set "view engine", "jade"
    app.use express.favicon()
    app.use express.logger("dev")
    app.use express.bodyParser()
    app.use express.methodOverride()
    app.use app.router
    app.use express.static(path.join(__dirname, "public"))

app.use (req,res,next)->
    res.locals.name = "Jesse"
    next()


app.use "/", (req,res,next)->
    res.locals.name = "Jesse"

app.configure "development", ->
    app.use express.errorHandler()

app.get "/", routes.index

http.createServer(app).listen app.get("port"), ->
    console.log "Express server listening on port " + app.get("port")

和我的查看是

extends layout

block content
  h1= title
  p Welcome to #{title}
  p Hello Mr #{name}

我希望每次get请求进入时都会调用第一个中间件（app.use），但它不会发生。 express2.x有什么变化吗？

这是来自快递3.x目录，并且已注释

https://github.com/visionmedia/express/blob/master/examples/view-locals/index.js

由于

Answer 1

以下是它的外观。您必须将中间件置于app.router

之上

express = require("express")
routes = require("./routes")
http = require("http")
path = require("path")
app = express()
app.set "port", process.env.PORT or 3000
app.set "views", __dirname + "/views"
app.set "view engine", "jade"
app.use express.favicon()
app.use express.logger("dev")
app.use express.bodyParser()
app.use express.methodOverride()

app.use (req,res,next)->
    res.locals.name = "Jesse"
    next()

app.use app.router
app.use express.static(path.join(__dirname, "public"))

app.configure "development", ->
    app.use express.errorHandler()

app.get "/", routes.index

http.createServer(app).listen app.get("port"), ->
    console.log "Express server listening on port " + app.get("port")

Answer 2

您可以尝试使用DEBUG标志运行脚本以查看正在进行的操作。 Express具有调试语句，用于显示已定义的路由以及如何处理请求。

$ DEBUG=* node app.js

Answer 3

将app.use移动到顶部...它应该可以工作。：）

Answer 4

您必须将中间件置于 app.configure（）部分之上。

nodejs express 3.0 app.use是否被调用

4 个答案: