‌一、GET请求

#FBrowser浏览器测试 可用
function TestA(url){  
    var req = new XMLHttpRequest();   
    req.open('GET', url, false);   
    req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); //设置协议头  
    req.send();   
    return req.responseText
}
TestA('https://lumtest.com/myip.json');

‌二、POST请求

#FBrowser浏览器测试 可用
function URL_POST(url){
  var req = new XMLHttpRequest(); 
  req.open('POST', url, false); 
  req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); //设置协议头
  req.send("locationType=LOCATION_INPUT&zipCode=10021&storeContext=generic&deviceType=web&pageType=Gateway&actionSource=glow"); 
  return req.responseText
}
URL_POST('http://lumtest.com/myip.json');

‌三、通过JS脚本 上传文件格式 FormData()

// 定义请求参数
const url = 'https://api.baidu.com/secure/api/order/#订单号长#/items/action';

const headers = {
  'authority': 'api.baidu.com',
  'user-agent': 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36',
  'accept': '*/*',
  'referer': 'https://api.baidu.com/secure/order/#订单号短#',
  'accept-language': 'zh-CN,zh;q=0.9',
};

// 创建 FormData 对象
const formData = new FormData();
formData.append('action', 'confirm');
formData.append('orderNumber', '#订单号短#');
formData.append('estDeliveryDate', '#pdate#T15:03:30+08:00');
formData.append('msgToCustomer', '');
formData.append('selectedItems', '#item_strs#');
formData.append('itemStrs', '#item_strs#');
formData.append('quantities', '#qty#');

// 发送请求
fetch(url, {
  method: 'POST',
  headers: headers,
  body: formData
})
.then(response => {
  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`);
  }
  return response.text();
})
.then(data => {
  console.log('Success:', data);
})
.catch(error => {
  console.error('Error:', error);
});