learning express step(五)
learning express middleware
var express = require('express');
var app = express();
var log =
var myLogger = function (req, res, next) {
log++;
console.log('var log =', log);
next();
}; app.use(myLogger); app.get('/', function(req, res){
res.send("hello world");
}); app.listen();
result:
C:\Users\admin\WebstormProjects\learning-express-step5>node learning-express-step5.js
var log =
var log =
var log =
var log =
request time log:
var express = require('express');
var app = express();
var log =
var myLogger = function (req, res, next) {
log++;
console.log('var log =', log);
next();
}; var requestTime = function(req, res, next){
req.requestTime = Date.now();
next();
} app.use(myLogger);
app.use(requestTime); app.get('/', function(req, res){
//res.send("hello world");
var responseText = 'hello world!<br>';
responseText +='<small>Requested at: ' + req.requestTime + '</small>'
res.send(responseText);
});
result:
write middleware
var express = require('express');
var app = express();
var mw = require('./my-middleware'); var log = 0;
var myLogger = function (req, res, next) {
log++;
console.log('var log =', log);
next();
}; var requestTime = function(req, res, next){
req.requestTime = Date.now();
next();
} app.use(myLogger);
app.use(requestTime);
app.use(mw({option1:'1',option2:'2'})); app.get('/', function(req, res){
//res.send("hello world");
var responseText = 'hello world!<br>';
responseText +='<small>Requested at: ' + req.requestTime + '</small>'
res.send(responseText);
}); app.listen(3000);
my-middleware.js each request print log option1 and option2
module.exports = function (options) {
return function (req, res, next) {
console.log(options.option1);
console.log(options.option2);
next()
}
result:
C:\Users\admin\WebstormProjects\learning-express-step5>node learning-express-step5.js
var log = var log = var log =
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