我正在使用axios进行HTTP请求,但是出现了错误。以下是来自axios文档关于处理错误的代码片段。
axios.get('/user/12345')
.catch(function (error) {
if (error.response) {
// The request was made and the server responded with a status code
// that falls out of the range of 2xx
console.log(error.response.data);
console.log(error.response.status);
console.log(error.response.headers);
} else if (error.request) {
// The request was made but no response was received
// `error.request` is an instance of XMLHttpRequest in the browser and an instance of
// http.ClientRequest in node.js
console.log(error.request);
} else {
// Something happened in setting up the request that triggered an Error
console.log('Error', error.message);
}
console.log(error.config);
});
error.request
的值为 true,这意味着(根据文档)已经发出了请求但未收到响应。我的问题是,可能是什么原因导致这种情况?有哪些情况会发出请求但未收到响应?谢谢