如何使用POST请求将动态获取的输入数据发送到服务器

IT技术 javascript reactjs
2021-05-18 04:38:33 

import React, { Component } from 'react';
import { Link } from 'react-router'

class Modals extends Component {
  constructor(props){
    super(props);
    this.state = {inputuuid: '',
    inputmajor: '' ,
    inputminor: '' ,
    inputmanufacturer: ''};
    this.handleUuid = this.handleUuid.bind(this);
    this.handleMajor = this.handleMajor.bind(this);
    this.handleMinor = this.handleMinor.bind(this);
    this.handleManufacturer = this.handleManufacturer.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
    alert("started");
fetch("http://api-env.bt2qjip33m.ap-south-1.elasticbeanstalk.com/api/v1/beacons" ,
 {
  method: 'post',
  headers: {
    'Content-Type': 'application/json',
    'Authorization' : 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1OGMyOTdiOWQzZWM4NjY4MDMwNDBlNjgiLCJlbWFpbCI6ImtrQGxpdGlmZXIuY29tIiwiZmlyc3ROYW1lIjoiS2lzaGxheSIsImxhc3ROYW1lIjoiS2lzaG9yZSIsImlhdCI6MTQ4OTE0NzgzM30.nHW5w3SSov8ySziblmw2VNlGI3CsZFR-v41Jeg9uBVs'
},
body: JSON.stringify({
    name: "beacon name 1234",
    description: "beacon description here for beacon",
    uuid: "this.state.inputuuid1",
    major: "this.state.inputmajor",
    minor: "this.state.inputminor",
    manufacturer: "this.state.inputmanufacturer",
    beaconType: "type9",
    location: "main gate8",
    floor: "ist",
    zone: "58c29c06d3ec866803040e6e"
})
}).then(function(response){
  if(response.ok) {
      console.log(response)
    return response;
  }
  throw new Error('Network response was not ok.');
}).then(function(data) { 
  console.log(data);
})
.catch(function(error) {
  console.log('There has been a problem with your fetch operation: ' + error);
});
}

handleUuid(event) {

    this.setState({inputuuid: event.target.value});
  }
  handleMajor(event){
    this.setState({inputmajor: event.target.value});
  }
  handleMinor(event){
    this.setState({inputminor: event.target.value});
  }
  handleManufacturer(event){
        this.setState({inputmanufacturer: event.target.value});
  }
handleSubmit(event) {

    alert('Submitted: ' + this.state.inputuuid + this.state.inputmajor + this.state.inputminor + this.state.inputmanufacturer);
    event.preventDefault();
  }

  render() {
    
    return (<div><div>
          <div className="animated fadeIn">
            <br /><div className="card" style={{ width: 57 + '%' }}>
              <div className="card-header">
                 Beacon Settings
              </div>
              <div className="card-block">
                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="icon-user"></i></span>
                  <input type="text"  className="form-control" value={this.state.inputuuid} onChange={this.handleUuid} placeholder="UUID" />
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputmajor} onChange={this.handleMajor} placeholder="Major Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputminor} onChange={this.handleMinor} placeholder="Minor Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputmanufacturer} onChange={this.handleManufacturer} placeholder="Manufacturer Number"/>
                </div><center>
                <Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success"  onClick={this.handleSubmit} activeClassName="active">Save</Link>

<Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success" activeClassName="active">Advance Settings</Link>
</center>

            </div>
          </div>
</div></div>
      </div>
      
        
      
    )
  }
}

export default Modals;

我已经接受了用户输入，现在我想使用我无法发送的 POST 请求将它们发送到服务器。我只得到用户的值，这些值可以通过我输入的警报看到，但无法发送到服务器

2个回答

尝试使用以下方式

fetch('https://mywebsite.com/endpoint/', {
 method: 'POST',
 headers: {
  'Accept': 'application/json',
  'Content-Type': 'application/json',
},
body: JSON.stringify({
  firstParam: 'yourValue',
  secondParam: 'yourOtherValue',
 })
});

React 需要对 post body 数据进行字符串化

您可以像这样创建 inputField：

<input className="form-control" type="text" value={this.state.userData.firstName} required placeholder="First Name" onChange={this.handleChange.bind(this, 'firstName')} />

在您的表单组件中，您可以通过以下方式定义 userData 状态对象：

this.state = {
  userData: {
    firstName: null,
    lastName: null,
    ...
  }
}

而对于handleChange()，我们可以让它接受状态变量的动态键： 

handleChange(key, e, value){
  let data = this.state.userData;
  userData[key] = e.target.value;
  this.setState({
    userData: data
  });
}

您需要发布的只是 this.state.userData。

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