Vue cannot receive parameters using $HTTP server

Li gulare 2020-11-12 23:46:30
vue receive parameters using http


I'm holding the proposal book , I heard a soft voice behind me :“ Brother Li , I have a Bug It's been a long time , Can you help me to have a look ?”. It was my good friend who said this , Ivanka, the new front sister of the company . I got up and went to her , See due to long time debugging Bug A flush on a beautiful face , The original people will become gentle , It's not like me at all .

“ I use vue Medium http Method to delete an image asynchronously , How can the backend not receive the parameters I send , At the same time, I also reported 500.”

After listening to this... Described by Ivanka Bug Clinical realization , Based on my many years of medical experience , The location of the lesion has been roughly guessed . But I don't want to end this free clinic so soon , You know me , Let her thoroughly understand , It's my choice .

I'll tidy up my coat , I sat on my little sister's station demurely , Start my treatment rescue sb. The process : at 、 smell 、 ask 、 cut .

One : at

Run this function in the browser , Open the debug window , To find the XHR(XMLHttpRequest) Request connection , see Headers At the bottom of the tab , As shown in the figure below

Request Payload, Please pay attention to the data format .

Two : smell

Open the code written by Ivanka , I finally saw the feeling of the legendary poem , Again 26 Letters , What I knock out is pretty .

this.$vux.confirm.show({
title: " Tips ",
content: " Are you sure you want to delete this picture ?",
onConfirm() {
that.$http({
method: "post",
url: `${that.$$baseURL}/upload/delBelowImg`,
headers: {
token: token,
'Content-Type':'application/json'
},
data:{
file:item.filePath,
id:id,
name:item.name
}
}).then(res => {});
}
});

I swear, , The above code is definitely from Ivanka , Nothing has changed . But when this clip appears in my blog, fart doesn't feel like , It's no surprise that you said it was strange .

3、 ... and : ask

I turned my head to write java Trump , say :“ Xiaochuan , The interface between you and Ivanka's little sister , Send me the code ”.5 In seconds , I received the following code without aesthetic feeling .

@RequestMapping(value = "/delBelowImg")
@Transactional
public void delBelowFile(@RequestParam Map<String, Object> params,HttpServletRequest request){
try {
……
} catch (Exception e) {
……
}
}

@RequestParam Pay attention to this note .

Four : cut

By now I've got the exact cause , I'll make some analysis , In the hope link , We see Ivanka's little sister poem like code making requests , The format of sending request parameter in browser is :

Request Payload, In the question section , See the code written by Ogawa , The note is @RequestParam, So the result is , The request data format sent by Xiaomei is not consistent with that of Xiaochuan , No wonder parameters are not accepted .

I made a few changes based on my sister's code as follows ( Red is the change part ):

const data = {
file:item.filePath,
id:id,
name:item.name
}
this.$vux.confirm.show({
title: " Tips ",
content: " Are you sure you want to delete this picture ?",
onConfirm() {
that.$http({
method: "post",
url: `${that.$$baseURL}/upload/delBelowImg`,
headers: {
token: token,
'Content-Type':'application/json'
},
params:data
}).then(res => {});
}
});

 

I open the browser again , The format of this send parameter is Query String Parameters, As shown in the figure below

The server successfully received the parameters , The picture is deleted normally , Ivanka's little sister is smiling again , Even the look in my eyes is firmer , It seems that this man is right . I know our revolutionary friendship has been sublimated again . I showed the proletarian signature smile to yinwanka's little sister ?

In Ivanka little sister asked “ Why? ” Three words , I ran back to the station .

 

Bug It's mobile

It's not up to people

Why are you excited to ask for a reason

 

Expand :

Interested students please understand the following asynchronous request format differences , You need to know that there is a little sister of Ivanka waiting for you to answer , Don't go to study .

front end :

Request Payload

Form Data

Query String Parameters

Back end :

@RequestParam

@RequestBody

 

版权声明
本文为[Li gulare]所创,转载请带上原文链接,感谢

  1. [front end -- JavaScript] knowledge point (IV) -- memory leakage in the project (I)
  2. This mechanism in JS
  3. Vue 3.0 source code learning 1 --- rendering process of components
  4. Learning the realization of canvas and simple drawing
  5. gin里获取http请求过来的参数
  6. vue3的新特性
  7. Get the parameters from HTTP request in gin
  8. New features of vue3
  9. vue-cli 引入腾讯地图(最新 api,rocketmq原理面试
  10. Vue 学习笔记(3,免费Java高级工程师学习资源
  11. Vue 学习笔记(2,Java编程视频教程
  12. Vue cli introduces Tencent maps (the latest API, rocketmq)
  13. Vue learning notes (3, free Java senior engineer learning resources)
  14. Vue learning notes (2, Java programming video tutorial)
  15. 【Vue】—props属性
  16. 【Vue】—创建组件
  17. [Vue] - props attribute
  18. [Vue] - create component
  19. 浅谈vue响应式原理及发布订阅模式和观察者模式
  20. On Vue responsive principle, publish subscribe mode and observer mode
  21. 浅谈vue响应式原理及发布订阅模式和观察者模式
  22. On Vue responsive principle, publish subscribe mode and observer mode
  23. Xiaobai can understand it. It only takes 4 steps to solve the problem of Vue keep alive cache component
  24. Publish, subscribe and observer of design patterns
  25. Summary of common content added in ES6 + (II)
  26. No.8 Vue element admin learning (III) vuex learning and login method analysis
  27. Write a mini webpack project construction tool
  28. Shopping cart (front-end static page preparation)
  29. Introduction to the fluent platform
  30. Webpack5 cache
  31. The difference between drop-down box select option and datalist
  32. CSS review (III)
  33. Node.js学习笔记【七】
  34. Node.js learning notes [VII]
  35. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  36. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  37. 【JQuery框架,Java编程教程视频下载
  38. [jQuery framework, Java programming tutorial video download
  39. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  40. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  41. 【Vue,阿里P8大佬亲自教你
  42. 【Vue基础知识总结 5,字节跳动算法工程师面试经验
  43. [Vue, Ali P8 teaches you personally
  44. [Vue basic knowledge summary 5. Interview experience of byte beating Algorithm Engineer
  45. 【问题记录】- 谷歌浏览器 Html生成PDF
  46. [problem record] - PDF generated by Google browser HTML
  47. 【问题记录】- 谷歌浏览器 Html生成PDF
  48. [problem record] - PDF generated by Google browser HTML
  49. 【JavaScript】查漏补缺 —数组中reduce()方法
  50. [JavaScript] leak checking and defect filling - reduce() method in array
  51. 【重识 HTML (3),350道Java面试真题分享
  52. 【重识 HTML (2),Java并发编程必会的多线程你竟然还不会
  53. 【重识 HTML (1),二本Java小菜鸟4面字节跳动被秒成渣渣
  54. [re recognize HTML (3) and share 350 real Java interview questions
  55. [re recognize HTML (2). Multithreading is a must for Java Concurrent Programming. How dare you not
  56. [re recognize HTML (1), two Java rookies' 4-sided bytes beat and become slag in seconds
  57. 【重识 HTML ,nginx面试题阿里
  58. 【重识 HTML (4),ELK原来这么简单
  59. [re recognize HTML, nginx interview questions]
  60. [re recognize HTML (4). Elk is so simple