"访问-控制-允许-起源'标头存在于请求的资源上

Question

我试着把数据从React.jslocalhostinsert.php文件。当我提交的形式从reactjs它给我错误的控制台错误是：

1. 访问位于“”的XMLHttpRequesthttp://localhost/reactphpdemo/connect.php“起源”http://localhost:3000'已被CORS策略阻止：对飞行前请求的响应未通过访问控制检查：请求的资源上不存在'access control Allow Origin'标头

这是我的密码

import React, { Component } from 'react';
import axios from 'axios';

export default class Insert extends Component {
constructor(props){
    super(props);
    this.onSubmit = this.onSubmit.bind(this);

    this.state={
        first_name:'',
        last_name:'',
        email:''
    }
}
onSubmit(e){
    e.preventDefault();
    const obj = {
        headers:{'Access-Control-Allow-Origin':'*'},
        first_name:this.state.first_name,
        last_name:this.state.last_name,
        email:this.state.email,
    };
    axios.post('http://localhost/reactphpdemo/insert.php',obj).then(res=>console.log(res.data));
    this.setState({
        first_name:'',
        last_name:'',
        email:''
    })
}
render() {
    return (
        <form onSubmit={this.onSubmit}>
            <div class="form-group">
                <input type="submit" value="Register User" class="btn btn-primary" name="name" />
            </div>
        </form>
    )   
}

Answer 1

只需将这些添加到您的. php文件中，它就可以完成以下操作：

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: 'X-Requested-With,content-type'");
header("Access-Control-Allow-Methods: 'GET, POST, OPTIONS, PUT, PATCH, DELETE'");

或者你可以使用像“Moesif Origin”这样的Chrome插件