fetch 方法返回一个 Promise 对象, 根据 Promise Api 的特性, fetch 可以方便地使用 then 方法将各个处理逻辑串起来, 使用 Promise.resolve() 或 Promise.reject() 方法将分别返会肯定结果的 Promise 或否定结果的 Promise, 从而调用下一个 then 或者 catch。一旦 then 中的语句出现错误, 也将跳到 catch 中。...
Fetch是一种现代的Web API,用于替代传统的XMLHttpRequest对象,提供了更简洁、灵活的方式来进行网络通信。 在使用Fetch发送文件和数据时,可以通过以下步骤进行操作: 构建请求对象:使用Fetch API的fetch()函数创建一个请求对象,并指定要发送的URL和请求方法(GET、POST、PUT等)。 设置请求头:使用请求对象的headers属性,...
}catch(error) {console.log('Request Failed', error); } } 发送json数据 asyncfunctionsendJson() {consturl ='http://example.com';constuser = {name:'John',surname:'Smith'};try{constresponse =awaitfetch(url, {method:'POST',headers: {'Content-Type':'application/json;charset=utf-8'},body...
// 实例化一个Request实例// 第一个参数一般指资源路径// 第二个参数可以理解为请求的配置项,包含头部信息和http请求一些关键配置(请求类型、参数...)letrequestInstance =newRequest('/hello', {method:'post',headers: {'Content-Type':'application/json;charset=utf-8'},body:'{"hello": "world"}'})/...
1.RESTFUL - GET POST PUT DELETE 2.跨域 - CORS、JSONP 3.状态码 => 浏览器缓存 => 强缓存 + 协商缓存 fetch 1.使用了es6的promise 2.fetch底层用的Request对象的接口 const response = fetch(url, { method: "GET", headers: { "Content-Type": "text/plain;charset=UTF-8" }, body: undefined...
Using fetch() function Using the fetch() function with async/await Using request objectMethod 1 − Using the fetch() functionWe can send data using the fetch() function. In this function, we create JSON data in the body parameter and use the POST request method to send data on the ...
So this is how we can send the POST request using Fetch API. Using this request we can easily send data to the specified URL or server. Also using the fetch() function you can modify your request according to your requirements. Now in the next article, we will learn how to send a PU...
Regular Request After0.8.0rn-fetch-blob automatically decides how to send the body by checking its type andContent-Typein the header. The rule is described in the following diagram To sum up: To send a form data, theContent-Typeheader does not matter. When the body is anArraywe will set...
method: "POST", body: formData, }) Copy The key to sending a POST request with fetch() is to specify data to send to the server in the body option. This can be in several formats, including JSON, FormData, and text. When sending a FormData object, you do not need to specify a ...
OkHttp Get 和 Post 请求 ( 同步 Get 请求 | 异步 Get 请求 | 同步 Post 请求 | 异步 Post ...