This time I will bring you how to quickly solve the vue axios request timeout and what are the precautions to solve the vue axios request timeout. The following is a practical case, let's take a look.
Specific reason
The company is currently working on a project. The server-side data interface uses the API output by Php. Sometimes it will fail during the call process. Provisional headers are shown in Google Chrome.
Solution 1 with pitfalls
My experience is limited and I think the only thing I can do is to make a new request after the axios request times out. . By studying the instructions for use of axios, set a timeout = 6000axios.defaults.timeout = 6000;
// Add a request interceptor
axios.interceptors.request.use(function (config) {
// Do something before request is sent
return config;
}, function (error) {
// Do something with request error
return Promise.reject(error);
});
// Add a response interceptor
axios.interceptors.response.use(function (response) {
// Do something with response data
return response;
}, function (error) {
// Do something with response error
return Promise.reject(error);
});this.$axios.get(url, {params:{load:'noload'}}).then(function (response) {
//dosomething();
}).catch(error => {
//超时之后在这里捕抓错误信息.
if (error.response) {
console.log('error.response')
console.log(error.response);
} else if (error.request) {
console.log(error.request)
console.log('error.request')
if(error.request.readyState == 4 && error.request.status == 0){
//我在这里重新请求
}
} else {
console.log('Error', error.message);
}
console.log(error.config);
});
Solution 2 with pitfalls
After studying the source code of axios, after timeout, The error message is caught in axios.interceptors.response in the interceptor, and error.code = "ECONNABORTED", specific link https://github.com/axios/axios/blob/26b06391f831ef98606ec0ed406d2be1742e9850/lib/ adapters/xhr.js#L95-L101// Handle timeout
request.ontimeout = function handleTimeout() {
reject(createError('timeout of ' + config.timeout + 'ms exceeded', config, 'ECONNABORTED',
request));
// Clean up request
request = null;
};axios.interceptors.response.use(function(response){
....
}, function(error){
var originalRequest = error.config;
if(error.code == 'ECONNABORTED' && error.message.indexOf('timeout')!=-1 && !originalRequest._retry){
originalRequest._retry = true
return axios.request(originalRequest);
}
}); this.$axios.get(url).then.
Perfect solution
In AOP programming, what I need is a global function that re-requests with timeout, to be in axios.Interceptors After working hard, I looked for some solutions from others in the axios issue on github, and finally found a perfect solution, which is the one below. https://github.com/axios/axios/issues/164#issuecomment-327837467//在main.js设置全局的请求次数，请求的间隙
axios.defaults.retry = 4;
axios.defaults.retryDelay = 1000;
axios.interceptors.response.use(undefined, function axiosRetryInterceptor(err) {
var config = err.config;
// If config does not exist or the retry option is not set, reject
if(!config || !config.retry) return Promise.reject(err);
// Set the variable for keeping track of the retry count
config.retryCount = config.retryCount || 0;
// Check if we've maxed out the total number of retries
if(config.retryCount >= config.retry) {
// Reject with the error
return Promise.reject(err);
}
// Increase the retry count
config.retryCount += 1;
// Create new promise to handle exponential backoff
var backoff = new Promise(function(resolve) {
setTimeout(function() {
resolve();
}, config.retryDelay || 1);
});
// Return the promise in which recalls axios to retry the request
return backoff.then(function() {
return axios(config);
});
}); this.$axiosThe get and post methods do not need to modify their code at all.
以下是我做的一个试验。。把axios.defaults.retryDelay = 500, 请求 www.facebook.com
如有更好的建议，请告诉我，谢谢。
补充：
axios基本用法
vue更新到2.0之后，作者就宣告不再对vue-resource更新，而是推荐的axios,前一段时间用了一下，现在说一下它的基本用法。
首先就是引入axios,如果你使用es6，只需要安装axios模块之后
import axios from 'axios'; //安装方法 npm install axios //或 bower install axios
当然也可以用script引入
axios提供了一下几种请求方式
axios.request(config) axios.get(url[, config]) axios.delete(url[, config]) axios.head(url[, config]) axios.post(url[, data[, config]]) axios.put(url[, data[, config]]) axios.patch(url[, data[, config]])
这里的config是对一些基本信息的配置，比如请求头，baseURL，当然这里提供了一些比较方便配置项
//config
import Qs from 'qs'
{
//请求的接口，在请求的时候，如axios.get(url,config);这里的url会覆盖掉config中的url
url: '/user',
// 请求方法同上
method: 'get', // default
// 基础url前缀
baseURL: 'https://some-domain.com/api/',
transformRequest: [function (data) {
// 这里可以在发送请求之前对请求数据做处理，比如form-data格式化等，这里可以使用开头引入的Qs（这个模块在安装axios的时候就已经安装了，不需要另外安装）
data = Qs.stringify({});
return data;
}],
transformResponse: [function (data) {
// 这里提前处理返回的数据
return data;
}],
// 请求头信息
headers: {'X-Requested-With': 'XMLHttpRequest'},
//parameter参数
params: {
ID: 12345
},
//post参数，使用axios.post(url,{},config);如果没有额外的也必须要用一个空对象，否则会报错
data: {
firstName: 'Fred'
},
//设置超时时间
timeout: 1000,
//返回数据类型
responseType: 'json', // default
}有了配置文件，我们就可以减少很多额外的处理代码也更优美，直接使用
axios.post(url,{},config)
.then(function(res){
console.log(res);
})
.catch(function(err){
console.log(err);
})
//axios请求返回的也是一个promise,跟踪错误只需要在最后加一个catch就可以了。
//下面是关于同时发起多个请求时的处理
axios.all([get1(), get2()])
.then(axios.spread(function (res1, res2) {
// 只有两个请求都完成才会成功，否则会被catch捕获
}));最后还是说一下配置项，上面讲的是额外配置，如果你不想另外写也可以直接配置全局
axios.defaults.baseURL = 'https://api.example.com';
axios.defaults.headers.common['Authorization'] = AUTH_TOKEN;
axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded';
//当然还可以这么配置
var instance = axios.create({
baseURL: 'https://api.example.com'
});本文只是介绍基本的用法，详细看官方文档https://github.com/axios
我写的两个例子：
使用vue2.0+mintUI+axios+vue-router: https://github.com/Stevenzwzhai/vue-mobile-application
使用vue2.0+elementUI+axios+vue-router: https://github.com/Stevenzwzhai/vue2.0-elementUI-axios-vueRouter, 之前由于没做后端接口，所以运行没数据，现在加了mockjs来返回一些数据，以便于参考。
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