设计一个请求中断器，如果请求超过一定的时间未响应就将其中断并返回失败。 #31

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1. CodeRookie262

   added

   javascript

   on Jan 27, 2021
2. CodeRookie262

   changed the title [-]设计一个请求中断器，如果一个请求在超过一定的时间下未响应就中段并且并且返回失败。[/-] [+]设计一个请求中断器，如果请求超过一定的时间未响应就将其中断并返回失败。[/+] on Jan 27, 2021
3. CodeRookie262

   closed this as completedon Jan 27, 2021
4. CodeRookie262

   reopened this on Jan 27, 2021
5. CodeRookie262 commented on Jan 28, 2021

   

   CodeRookie262

   on Jan 28, 2021

   OwnerAuthor

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   可以借助 Promise 和 AbortController 进行异步管控和中断请求。

         function request(options = {}) {
           let { delay, url, option = {} } = options;
   
           const abortController = new AbortController();
           const signal = abortController.signal;
   
           return new Promise((resolve, reject) => {
             fetch(url, { ...option, signal })
               .then(r => r.json())
               .then(resolve, reject);
   
             if (delay === undefined) return;
             const timer = setTimeout(() => {
               abortController.abort();
               reject({ msg: '请求延时' });
               clearTimeout(timer);
             }, delay);
           });
         }