POST：REACT APP 上的 400 错误请求 - 使用 Express

Question

我正在学习 React，而且我也是新手，所以我非常感谢您的帮助！ 所以我目前被困在我的 POST 请求上，并且我收到状态 400 = 我已经能够将我的数据存储在 JSON 对象中并获得正确的信息以显示在我的客户端上。 但是，我正在尝试发出 POST 请求来更新标题和描述，并将我的新视频添加到前端的列表中。 这是我的代码

反应组件/AXIOS 请求

import React from 'react';
import upload from '../../assets/Images/Upload-video-preview.jpg';
import axios from 'axios';
import './Upload.scss';

class Upload extends React.Component {
   state = {
    title: '',
    description: ''
}

handleChange = event => {
    this.setState({title: event.target.value, description: event.target.value});
}

submitHandler = (event) => {
    console.log('FORM', event.target.title.value, event.target.description.value);
    event.preventDefault();
    axios.post('http://localhost:8080/videos/')
    .then(results => {
        console.log(results);
    })
 
}

render() {
    return(
        <section className="upload">
            <h1 className="upload-header">Upload Video </h1>
            <div className="upload-div">   
                <div className="upload-div__inner">
                    <h3 className="upload-div__inner--h3">Video Thumbnail</h3>
                    <img src={upload}  className="upload-div__inner--img"/>
                </div>
            <form className="upload-form" onSubmit={this.submitHandler}>
               <div className="upload-form--div">
                    <label className="upload-form--div-label">TITLE YOUR VIDEO</label>
                        <input type="text" name="title" className="upload-form--div-input" />
                    <label className="upload-form--div-label">ADD A VIDEO DESCRIPTION</label>
                    <input type="text" name="description" className="upload-form--div-input" />
                </div> 
                <button type="submit" className="comment__form--outer-button" >Cancel</button>
                <button type="submit" className="comment__form--outer-button" >Publish</button>
            </form>
            </div>
        </section>
    )

    }
}

导出默认上传；

服务器端代码：

const express = require('express');
const app = express();
const router = express.Router();
const { v4: uuidv4 } = require('uuid');
const videoList = require('../data/videoId.json');
const fs = require('fs');

app.use(express.json());

router.get('/', (req, res) => {
    res.status(200).json(videoList);

})
console.log(videoList);
router.get('/:id', (req, res) => {
    const search = videoList.find((video) => video.id == req.params.id);
    if (search) {
      res.status(200).json(search);
    } else {
     res.status(400).json({
      error: 'Video not found'
      });
    }
  });

  router.post('/', (req, res) => {
    console.log(req.params)
    if(req.headers["content-type"] && req.headers["content-type"]==="application/json"){
      if(req.body){
          let newVideo = {
              id: uuidv4(),
              title: req.body.title,
              description: req.body.description
          }

          videoList.push(newVideo)

          fs.writeFile('./videoId.json', JSON.stringify(videoList), (err) => {
              if(!err){
                  res.status(201).send(newVideo)
              } else {
                  res.status(400).send({
                      success: false,
                      message: `Unable to write to videoId.json: ${err}`
                  })
              }
          })
      } else {
          res.status(400).send({
              success: false,
              message: "Data malformed"
          })
      }
  } else {
      res.status(400).send({
          success: false,
          message: "Invalid content type"
      })
  }

  })

module.exports = router;

我的对象存在于一个名为 videoId.json 的文件中，这里是它的一个片段：

    [
{
    "id": "1af0jruup5gu",
    "title": "BMX Rampage: 2018 Highlights",
    "channel": "Red Cow",
    "image": "https://i.imgur.com/l2Xfgpl.jpg",
    "description": "On a gusty day in Southern Utah, a group of 25 daring mountain bikers             lew the doors off what is possible on two wheels, unleashing some of the biggest moments the sport has ever seen. While mother nature only allowed for one full run before the conditions made it impossible to ride, that was all that was needed for event veteran Kyle Strait, who won the event for the second time -- eight years after his first Red Cow Rampage title",
"views": "1,001,023",
"likes": "110,985",
"duration": "4:01",
"video": "https://project-2-api.herokuapp.com/stream",
"timestamp": 1545162149000,
"comments": [
    {
        "name": "Micheal Lyons",
        "comment": "They BLEW the ROOF off at their last show, once everyone started figuring out they were going. This is still simply the greatest opening of acconcert I have EVER witnessed.",
        "id": "1ab6d9f6-da38-456e-9b09-ab0acd9ce818",
        "likes": 0,
        "timestamp": 1545162149000
    },
    {
        "name": "Gary Wong",
        "comment": "Every time I see him shred I feel so motivated to get off my couch and hop on my board. He’s so talented! I wish I can ride like him one day so I can really enjoy myself!",
        "id": "cc6f173d-9e9d-4501-918d-bc11f15a8e14",
        "likes": 0,
        "timestamp": 1544595784046
    },
    {
        "name": "Theodore Duncan",
        "comment": "How can someone be so good!!! You can tell he lives for this and loves to do it every day. Everytime I see him I feel instantly happy! He’s definitely my favorite ever!",
        "id": "993f950f-df99-48e7-bd1e-d95003cc98f1",
        "likes": 0,
        "timestamp": 1542262984046
    }
]

]]

Answer 1

我想我想得太难了，我简化了我的代码 - 现在我只需要弄清楚下一步并传递我的值，以便在我发布请求后它们就会出现

  router.post('/', (req, res) => {
if(req.body) {
  videoList.push(req.body);
  res.status(201).json({
      success: true
  })
  } else {
     res.status(400).json({
          success: false,
          error: "Please provide a valid title!"
      })
  }

  })