Example tutorial on mock.js random data and using express to output json interface-JS Tutorial-php.cn

Example tutorial on mock.js random data and using express to output json interface

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Release： 2018-01-09 09:35:24

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Front-end projects will all use the back-end interface, but when the back-end interface is not written well, you can use mock.js to randomly generate some fake data to debug the page. This article mainly introduces the implementation method of using mock.js random data and using express to output json interface. Friends in need can refer to it. I hope it can help everyone.

Install mock.js

First use express to create a nodejs web project. If the name is demo, I won’t go into it here

yarn add mockjs

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Use

const Mock = require('mockjs')

var data = Mock.mock({
 'list|2': [{
 'id|+1': 1,
 'color': '@color()',
 'date': '@datetime()',
 'img': '@image()',
 'url': '@url(http)',
 'email': '@email()',
 'name': "@name(1,2)",
 'text': '@paragraph()'
 }]
})
console.log(JSON.stringify(data))

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The above random method can be found in the link to the mockjs document given at the bottom. The method called by Mock.Random can be used directly by adding @ in front. It is very convenient.

Output

{
 "list": [
 {
  "id": 1,
  "color": "#8179f2",
  "date": "2015-06-22 12:10:08",
  "img": "http://dummyimage.com/250x250",
  "url": "http://hwujcvh.fk/vfrjfmi",
  "email": "y.ahbatuekk@mbkhfybrh.pl",
  "name": "James Ronald Rodriguez",
  "text": "Zsogshtw qjscoe qwggnfk ppbdpqd avftd pvczrvnu gsyfyefm rbnbjyy tgemy buple ieghyjp klcxauofu lhjmnb kjpyodk. Njync ysrvx jevei stawy mcosrlpo iacryqob wkkcfuh nkrrdutr zduikjvtf dcv pppbhi ygjnkmg xvpusp ayu lvu. Wgqmtwvo ibqzp cct kodyh ovz slo cpc uqaseuwv ubjgbf hihh oudly mooztiojpi tubmwhsmb kktbkyqp hsvwgoluu jrkosqudm. Wpumdvtw riytwoa sbittrr xtjy beorkb osnjpigntu ndrgxhozeq iufhu hpuirgmh lstoijpqx hopk lkxceqhvr uymj pgdms njjmu ivxijmokn."
 },
 {
  "id": 2,
  "color": "#94f279",
  "date": "1980-02-20 19:46:44",
  "img": "http://dummyimage.com/336x280",
  "url": "http://voyqj.cx/jjyksqzur",
  "email": "k.ydgui@gixl.cr",
  "name": "Ronald Nancy Harris",
  "text": "Lbdpwqwpgd sodipqu oncnnyis ebtwho dnbt fqxnjyzr qtrriop gfbjt prto dgmtgff gwaqnhon sdlvpxpj pqomfflsc skj. Cvteunoj oqmjnfm vowvmw ypywtr klcazkvg cvsyzayytl bgvywe kfqqzhfg iahm jwury xsgf xnr pvfxwhaed nauookwi xuxtgnwq flcbmnrm qglgziy vegml. Cexit vdotefuj nptmei hekmljnt bukxrd ndhj lkfyjcv oldpgo rrj kprfklt nfks yvrvc. Aynbyd hxguza ftjrn kmlirqo wxald jqjkvahim jnhezpgm usev qbynwhm yotehgkwdg eyxj vfnm icchnds dgmd odxajing vqrdl yhpp eba. Tykxnhe njod bslwbsjcj rwlv rkvxk rypew fpfqrqi psislxuwgs jcwrbtfn qeszy leovhc jwupwzo kitct nhbdhjq xyiajxms. Gfgkw nnlg drcqnpwn bowqknwy oiw yysaohk fqqsbgvp mulik vusikwv nbp kpbo nhti dhf hrgql."
 }
 ]
}

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Integrated into express to output json

const Mock = require('mockjs')

exports.index = function(req, res) {
 var data = Mock.mock({
 'list|2': [{
  'id|+1': 1,
  'color': '@color()',
  'date': '@datetime()',
  'img': '@image()',
  'url': '@url(http)',
  'email': '@email()',
  'name': "@name(1,2)",
  'text': '@paragraph()'
 }]
 })
 // 延时1秒，模拟网络请求时间
 setTimeout(function() {
 res.send(JSON.stringify(data))
 }, 1000);
}

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express cross-domain

The interface address will definitely be different from the front-end project address. At this time, requesting the interface will involve cross-domain issues. , the solution in express is as follows

app.all('*', function(req, res, next) {
 res.header("Access-Control-Allow-Origin", "http://localhost:8080");
 res.header("Access-Control-Allow-Headers", "X-Requested-With");
 res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
 res.header("X-Powered-By",' 3.2.1')
 res.header("Content-Type", "application/json;charset=utf-8");
 res.header('Access-Control-Allow-Credentials', true);
 next();
});

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Explanation: The above code was found online, but the sentence res.header('Access-Control-Allow-Credentials', true);## was not found online.

#The address of my front-end project is http://localhost:8080, so the value of Access-Control-Allow-Origin is http://localhost:8080

It can be modified according to your own server.

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