React 获取服务器API接口数据:axios、fetchJsonp
使用axios、fetchJsonp获取服务器的接口数据。其中fetchJsonp是跨域访问
一、使用axios
1、安装axios模块
npm install --save axios
2、引用模块
import axios from 'axios'
3、实现请求
import axios from 'axios';
const request = (url: string, params = {}, data = {}, options) => {// debug(url, params);return new Promise((resolve, reject) => {
axios({url, params, data, ...options})
.then((response) => {
// debug(response);
// 请求返回为json格式, 则response.data必须为对象,且必须有固定的格式,
// 这里没有处理返回值为字符串的情况, 目前没有这样的需求
reject(response);
})
.catch((error) => {
debug(error);
reject(error);
});
});
};
export function get (url: string, params?: any, options?: any) {
return request(url, params, undefined, {method: 'get', ...options});
}
export function post (url: string, data?: any, options?: any) {
return request(url, undefined, data, {method: 'post', ...options});
}
//这段代码还没有经过测试,如果不行可以尝试下面代码
request = (url) => {
axios.get(url)
.then((res) => {
console.log(res);
})
.catch((err) => {
console.log(err);
})
}
二、使用fetchJsonp
1、安装fetchJsonp模块
npm install --save fetchJsonp
2、引用模块
import fetchJsonp from 'fetch-jsonp';
3、使用(还没有测试的)
import fetchJsonp from 'fetch-jsonp';
jsonp (url: string, callback = null) {return new Promise((resolve, reject) => {
fetchJsonp(url, {callback})
.then((res) => {
resolve(res);
})
.catch((err) => {
debug(err);
})
})
}
这里说下fetchJsonp的问题
在代码中应该使用script标签,引用js文件
let script = document.createElement('script');script.type = 'text/javascript';
script.src = 'http://192.168.1.100:7700/Advert/GetAdvert?elementId=adid';
document.getElementById(this.props.htmlId).appendChild(script);
<div id={this.props.htmlId} style={this.props.styles}></div>
下面代码是接口http://192.168.1.100:7700/Advert/GetAdvert?elementId=adid返回的信息,其实是向代码中插入一个函数,自动运行,类似前端调用函数
(function(){var json = {"AdvertName":"图片广告","AdvertDesc":"图片广告","AdvertHeight":"100%","AdvertId":63102,
"AdvertImage":"https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=831914849,3674285067&fm=11&gp=0.jpg",
"AdvertWidth":"100%","JumpUrl":"http://192.168.2.88:7700/advert/JumpAdvert?advertId=63102&flowerId=1987&orderMark=7c3a8f5172494fcab09e5eee607aae66&merchantCode=",
"AdvertWord":"图片广告"};var elementId = '';
var div = document.createElement("div");
div.setAttribute
div.style.width = "100%";
div.style.overflow = "hidden";
var img = document.createElement("img");
img.src = json.AdvertImage;
img.style.maxWidth="100%";
img.onclick = function(){location.href=json.JumpUrl;}
div.appendChild(img);
if(elementId == '')
{
var scripts = document.getElementsByTagName("script");
var script = scripts[scripts.length - 1];
var dom = script.parentNode;
dom.removeChild(script);
dom.appendChild(div);
}
else
{
var dom = document.getElementById('');
dom.appendChild(div);
}
div = null;
img = null;
scripts = null;
script = null;
dom = null;
})();
fetchJsonp也类似这样,它使用的window[function_name] = function(){} ,可以查看它的原代码
以上是 React 获取服务器API接口数据:axios、fetchJsonp 的全部内容, 来源链接: utcz.com/z/384015.html