【vue】3.0 axios与fetch
在开发过程中,我们向服务端发送请求,一般会使用三种方式, XMLHttpRequest(XHR),Fetch ,jQuery实现的AJAX。
其中, XMLHttpRequest(XHR)和Fetch是浏览器的原生API,jquery的ajax其实是封装了XHR。
Fetch API是基于Promise设计,旧浏览器不支持Promise,需要使用pollyfill
说明:
a. fetch api返回的是一个promise对象
b.Options:
- method(String): HTTP请求方法,默认为
GET
- body(String): HTTP的请求参数
- headers(Object): HTTP的请求头,默认为{}
- credentials(String): 默认为
omit
,忽略的意思,也就是不带cookie;还有两个参数,same-origin
,意思就是同源请求带cookie;include
,表示无论跨域还是同源请求都会带cookie
<iframe id="tmp_downloadhelper_iframe" style="display: none;"></iframe>
c.第一个then函数里面处理的是response的格式,这里的response具体如下:
- status(number): HTTP返回的状态码,范围在100-599之间
- statusText(String): 服务器返回的状态文字描述,例如
Unauthorized
,上图中返回的是Ok
- ok(Boolean): 如果状态码是以2开头的,则为true
- headers: HTTP请求返回头
- body: 返回体,这里有处理返回体的一些方法
- text(): 将返回体处理成字符串类型
- json(): 返回结果和 JSON.parse(responseText)一样
- blob(): 返回一个Blob,Blob对象是一个不可更改的类文件的二进制数据
- arrayBuffer()
- formData()
![](http://upload-images.jianshu.io/upload_images/16102290-30cc8637d6f39bd8.png)
测试代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>fetch</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script type="text/javascript" src="lib/vue.js"></script>
</head>
<body><div id="box"><button @click="handleClick()">正在热映</button><ul><li v-for="data in datalist"><img :src="data.poster"/><h3>{{data.name}}</h3><p>{{data.synopsis}}</p><ul><li v-for="item in data.actors"><img :src="item.avatarAddress"/><h4>{{item.name}}</h4></li></ul></li></ul></div><script type="text/javascript">new Vue({el:"#box",data:{datalist:[]},methods:{handleClick(){fetch("json/test.json").then(result=>result.json()).then(res=>{console.log(res);this.datalist =res.data.films})//post-1// fetch("json/test.json",{// method:"post",// headers:{// "Content‐Type": "application/x‐www‐form‐urlencoded" // },// credentials: 'include',// body:"name=kerwin&age=100"// }).then(res=>res.json()).then(res=>{// console.log(res);// })//post -2 // fetch("json/test.json",{// method:"post",// headers:{// "Content‐Type": "application/json" // },// body:JSON.stringify({// name:"kerwin",// age:100// })// }).then(res=>res.json()).then(res=>{// console.log(res);// })}}})</script>
</body>
</html>
数据json文件:
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饰)搬进了尼克住过的这所房子。一场和25年前一样的风暴让两段时空交错,惊醒的维拉发现自己竟能与电视机里的尼克跨时空对话。维拉透过电视机试图挽救这个男孩的性命,却引发一系列连锁反应——女儿消失、丈夫和身边的人全都不再认识和相信自己。于是,维拉只能在风暴消失前有限的15小时里,与唯一相信她的莱拉警长(奇诺·达林饰)解开所有谜团…","filmType":{"name": "2D","value": 1},"nation": "西班牙","language": " 西班牙语","videoId": "XNDA5NDcwMzEwMA==","premiereAt": 1553731200,"timeType": 3,"runtime": 128,"grade": "7.3","item":{"name": "2D","type": 1},"isPresale": true,"isSale": false},{"filmId": 4581,"name": "雷霆沙赞!","poster": "https://pic.maizuo.com/usr/movie/a2d61d2ac9452a246cba2354162fcab9.jpg","actors": [{"name": "扎克瑞·莱维 ","role": "Shazam","avatarAddress": "https://pic.maizuo.com/usr/movie/c2d53d30380b1638460f491c3ea2405a.jpg"},{"name": "马克·斯特朗 ","role": "Dr. Thaddeus Sivana","avatarAddress": "https://pic.maizuo.com/usr/movie/765db70038bca878750550e3262019e2.jpg"},{"name": "米歇尔·博斯 ","role": "演员 ","avatarAddress": "https://pic.maizuo.com/usr/movie/75be8f6973e7ffe91be800a2b9a4e082.jpg"}],"director": "大卫·F·桑德伯格","category": "动作|奇幻|冒险","synopsis": "每个人身体里都潜藏着一位超级英雄,只需要一点魔力便能将其释放。14岁的街头小混混比利·巴特森(亚瑟·安其饰)通过大喊“沙赞”这个词,就可以变身为成年超级英雄沙赞(扎克瑞·莱维饰),这是一种来自于古老巫师的恩惠。如神一般的肌肉身体里,仍存有一颗孩子心,他开心地与超能力为伴。他能飞吗?他能X光透视吗?他能从手中射出闪电吗?他能不用再考试了吗?沙赞以孩子般轻率又鲁莽的方式,开始测试他的能力极限。但他需要尽快掌握这些力量,以对抗塞迪斯·希瓦纳博士控制的邪恶势力。","filmType":{"name": "3D","value": 2},"nation": "美国","language": "英语","videoId": "","premiereAt": 1554422400,"timeType": 3,"runtime": 132,"grade": "7.9","item":{"name": "3D","type": 2},"isPresale": true,"isSale": false},{"filmId": 4573,"name": "反贪风暴4","poster": "https://pic.maizuo.com/usr/movie/91f5bcd51621c9d7f2da217b1c208c7b.jpg","actors": [{"name": "郑嘉颖","role": "程德明 ","avatarAddress": "https://pic.maizuo.com/usr/movie/65aa4967ac74fb009f49ee368d11c806.jpg"},{"name": " 古天乐","role": "陆志廉","avatarAddress": "https://pic.maizuo.com/usr/movie/16cb37aee5bb9aa595d3fdf2127d507f.jpg"},{"name": "林峯 ","role": " 曹元元 ","avatarAddress": "https://pic.maizuo.com/usr/movie/90f338a92b51553c5b52b64ca4306fba.jpg"}],"director": "林德禄","category": "动作|犯罪","synopsis": "廉政公署收到报案人廖雨萍(周秀娜饰)的实名举报,举报正在坐牢的富二代曹元元(林峯饰)涉嫌行贿监狱里的监督沈济全(谭耀文饰)以及惩教员,首席调查主任陆志廉(古天乐饰)决定深入虎穴,卧底狱中。在监狱里,被陆志廉送入监狱的前警司黄文彬(林家栋饰)以及曹元元两大帮派势成水火,陆志廉趁机接近曹元元取得信任。同时监狱外的廉政公署总调查主任程德明(郑嘉颖饰)、国内反贪局行动处处长洪亮(丁海峰饰)也陆港联手,通力合作,最终成功破获贪腐行贿大案。","filmType":{"name": "2D","value": 1},"nation": "香港 中国大陆","language": " 粤语 汉语普通话","videoId": "","premiereAt": 1554336000,"timeType": 3,"runtime": 100,"grade": "7.5","item":{"name": "2D","type": 1},"isPresale": true,"isSale": false},{"filmId": 4565,"name": "比悲伤更悲伤的故事","poster": "https://pic.maizuo.com/usr/movie/61f497be0a190f86f8bfb092d430d0f1.jpg","actors": [{"name": "林孝谦 ","role": " 导演","avatarAddress": "https://pic.maizuo.com/usr/movie/2a0ab1b72a5498a95f6807195054d765.jpg"},{"name": "张书豪 ","role": " 杨佑贤","avatarAddress": "https://pic.maizuo.com/usr/movie/b96b37f77d519fb628d51145825b784b.jpg"},{"name": "陈意涵","role": "宋媛媛","avatarAddress": "https://pic.maizuo.com/usr/movie/6f631a01ae25c485d570c99128f0dd41.jpg"},{"name": "刘以豪 ","role": "张哲凯 ","avatarAddress": "https://pic.maizuo.com/usr/movie/b8874d7e5718908355342226a50a3a95.jpg"},{"name": "陈庭妮","role": "Cindy","avatarAddress": "https://pic.maizuo.com/usr/movie/237641023c141de5bbce4740e7adee6c.jpg"}],"director": "林孝谦","category": "爱情","synopsis": "唱片制作人张哲凯(刘以豪)和王牌作词人宋媛媛(陈意涵)相依为命,两人自幼身世坎坷只有彼此为伴,他们是亲人、是朋友,也彷佛是命中注定的另一半。父亲罹患遗传重症而被母亲抛弃的哲凯,深怕自己随时会发病不久人世,始终没有跨出友谊的界线对媛媛展露爱意。眼见哲凯的病情加重,他暗自决定用剩余的生命完成他们之间的终曲,再为媛媛找个可以托付一生的好男人。这时,事业有 成温柔体贴的医生(张书豪)适时的出现让他成为照顾媛媛的最佳人选,二人按部就班发展着关系。一切看似都在哲凯的计划下进行。然而,故事远比这里所写更要悲伤......","filmType":{"name": "2D","value": 1},"nation": "台湾","language": "汉语普通话","videoId": "","premiereAt": 1552521600,"timeType": 3,"runtime": 105,"grade": "6","item":{"name": "2D","type": 1},"isPresale": true,"isSale": false}],"total": 36},"msg": "ok"
}
axios
![](http://upload-images.jianshu.io/upload_images/16102290-74c7790ad724a158.png)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>fetch</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script type="text/javascript" src="lib/vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script></head>
<body><div id="box"><button @click="handleClick()">正在热映</button><ul><li v-for="data in datalist"><img :src="data.poster"/><h3>{{data.name}}</h3><p>{{data.synopsis}}</p><ul><li v-for="item in data.actors"><img :src="item.avatarAddress"/><h4>{{item.name}}</h4></li></ul></li></ul></div><script type="text/javascript">new Vue({el:"#box",data:{datalist:[]},methods:{handleClick(){// axios.get("json/test.json").then(res=>{// console.log(res.data);//真正的后端数据藏在res.data// this.datalist= res.data.data.films// })axios({url:"https://m.maizuo.com/gateway?cityId=110100&pageNum=1&pageSize=10&type=1&k=1384809",headers:{'X-Client-Info': '{"a":"3000","ch":"1002","v":"5.0.4","e":"154277371928424093566579"}','X-Host': 'mall.film-ticket.film.list'}}).then(res=>{console.log(res.data);this.datalist= res.data.data.films})} }})//vue-resource 2.0 作者不再维护,极力推荐 axios</script>
</body>
</html>
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