/**
 * example: <br>
 *  <p>request('http://localhost:3000/aricle/detail?id=1').then()... </p>
 *  request('http://localhost:3000/aricle/detail',{id:1}).then()... <br>
 *  request('http://localhost:3000/aricle/detail',{id:1},'POST').then()... <br>
 * @param {string} url 
 * @param {*} params 
 * @param {'GET'|'POST'} method 
 * @returns 
 */
const request = (url, params = {}, method = 'GET') => {
    return new Promise((resovle, reject) => {
        const options = {
            method: method
        }
        if (method.toUpperCase() == 'GET') {
            const query = [];
            for (let key in params) {

                query.push(`${key}=` + params[key]);
            }
            url = url + (url.includes('?') ? "&" : "?") + query.join('&')
        } else {
            options.headers = {
                'Content-Type': 'application/json'
            }
            options.body = JSON.stringify(params) // 对象转json
        }
        fetch(url, options)
            .then(res => res.json())
            .then(resovle)
            .catch(e => reject(e))
    });
}
//
export default request