react反向代理使用http-proxy-middleware问题

$ npm install --save-dev http-proxy-middleware

const { createProxyMiddleware } = require('http-proxy-middleware');  //注意写法，这是1.0以后的版本，最好按抄

module.exports = function (app) {
    app.use(createProxyMiddleware('/api',
        {
            target: 'http://ip:8000/',
            pathRewrite: {
                '^/api': '',
            },
            changeOrigin: true,
            secure: false, // 是否验证证书
            ws: true, // 启用websocket
        }
    ));
};

pathRewrite: {
    '^/api': '',
},

handle_click = ()=>{
    let t = this;
    fetch("/api/org/all", {method: 'GET'}).then(
        function (res) {
            console.log(res);
            res.json().then(function (data) {
                    console.log(data);
                    t.setState({
                        news:data
                    });
                }
            )
        });
};

{
    "total": 1,
    "list": [{
        "id": "64",
        "name": "湖南长沙",
        "code": "hncs",
        "type": "试装"
    }],
    "pageNum": 1,
    "pageSize": 10,
    "size": 1,
    "startRow": 1,
    "endRow": 1,
    "pages": 1,
    "prePage": 0,
    "nextPage": 0,
    "isFirstPage": true,
    "isLastPage": true,
    "hasPreviousPage": false,
    "hasNextPage": false,
    "navigatePages": 8,
    "navigatepageNums": [1],
    "navigateFirstPage": 1,
    "navigateLastPage": 1,
    "firstPage": 1,
    "lastPage": 1
}

import React, {Component} from 'react';
import { Picker, List, WhiteSpace } from 'antd-mobile';
import { createForm } from 'rc-form';

const prjList = [
    {
        label: "柳州项目",
        value: '1',
    },
    {
        label: "南宁项目",
        value: '2',
    },
];


class Add extends React.Component {
    state = {
        prjList: [],
        cols: 1,
        pickerValue: [],
        asyncValue: [],
        visible: false,
        colorValue: ['#00FF00'],
    };
    onChangeColor = (color) => {
        this.setState({
            colorValue: color,
        });
    };

    handle_click = ()=>{
        let t = this;
        fetch("/api/org/all", {method: 'GET'}).then(
            function (res) {
                console.log(res);
                res.json().then(function (data) {
                        console.log(data);
                        t.setState({
                            news:data
                        });
                    }
                )
            });
    };
    render() {
        const { getFieldProps } = this.props.form;
        return (<div>

            <WhiteSpace size="lg" />
            <List style={{ backgroundColor: 'white' }} className="picker-list">
                <Picker
                    data={prjList}
                    value={this.state.colorValue}
                    cols={1}
                    onChange={this.onChangeColor}
                >
                    <List.Item arrow="horizontal">选择项目</List.Item>
                </Picker>

            </List>
            <WhiteSpace size="lg" />
            <button onClick={this.handle_click}>button</button>
        </div>);
    }
}
const Wrapper = createForm()(Add);
export default class OrderAdd extends Component {
    render() {
        return (
            <Wrapper />
            )
    }
}