axios | 易学教程

Promise对象 3 种妙用

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 9012 年末，作为一个前端，说不了解 Promise 对象用法的基本不存在，这里就不对功能用法进行介绍了。但本文将会讲述你可能不知道的 Promise 3 种奇妙用法。当然，每种用法都会有其适用的特殊场景。 Promise 对象是可以缓存需求对于一个对象而言，能够被缓存并不是一件难以理解的事情。缓存使用的意义往往是为了解决性能问题。而对于一个特定请求的 Promise 对象而言，缓存的意义在于同时多个组件的使用该请求，会因为请求未返回而进行多次请求。一图胜千言，图示如下: 因为在某些特定需求或者场景下(甚至因为团队的因素)，某个组件在可以在页面单独使用，也可以结合其他组件共同使用。若此时多个组件都需要对某个通用数据进行请求，就会发生多次请求，对性能不利。但如果全部移植到父组件去请求，又是需要一顿操作，对开发不爽。解决方案所以这时候我们基于 api 与请求参数加缓存。先写一个生成 key 的函数(此函数仅仅只适用简单的请求参数，不适合对象等复杂数据结构，因为是通用型数据，不考虑太复杂的请求参数，如有需求可以自行改造)。 // 生成key值错误 const generateKeyError = new Error("Can't generate key from name and argument")

How to await a json return value (the return takes at least 30 seconds) before logging it? javascript/react/express

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问题 This is a follow up to these threads: How to set state of a react component with a specific item from a returned json object? How to return json data to a react state? I am using web3 to sign a transaction on Ethereum , which then sends a json object with transaction data. The json takes at least 30 seconds to return. I am trying to console.log() the data with the following code: axios.post( "http://compute.amazonaws.com:3000/users", { value: "value", fileName: "fileName", hash: "hash" } )

Dispatching action from onUploadProgress event using Redux-Thunk / Axios

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问题 The following code uploads a file no problem and responds successfully or failing as expected, however, I cannot figure out how to dispatch my uploadFileProgress action from the onUploadProgress event. I can console.log the progress / percentage and when I try to wrap the dispatch in an IIFE, I trigger a dispatch is not a function error. Hopefully this is a small issue I'm missing. Thanks in advance! export function uploadFile(values, callback = () => {}) { const uploadFileData = new FormData

Axios post entire from. (Vue.js)

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问题 Is there a way to just post the entire form, instead of having to specify the fields? I thought I had seen it somewhere but can't find it now. A bit like this in JQuery: $.ajax({ data: $("form").serialize(), //etc. }); This is in Vue.js component. Mick 回答1: One possible solution is to use v-model with object as mentioned by @MU. Apart from v-model , you can also use native FormData object, for example when you have dinamically created inputs and you can't/don't want to bind these inputs using

Timeout feature in the axios library is not working

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问题 I have set axios.defaults.timeout = 1000; I stopped the server that provides me with the APIs. But it takes more than 1s to timeout after sending a request. This is how my request looks: import axios from 'axios'; axios.defaults.timeout = 1000; return axios.post(`${ROOT_URL}/login/${role}`, creds).then((response) => { console.log(response); if(response.status === 200) { // If login was successful, set the token in local storage localStorage.setItem(`${role}_log_toks`, JSON.stringify(response

Sequential Message Sending Using Facebook Send-API

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问题 I'm trying to send messages using FB Send-Message API in sequential order, but have an issue with it. As a result my bot sends messages in wrong order. I have the following functions: function sendMessage(recipient, payload, accessToken) { return axios.post(baseURL + 'v2.11/me/messages/?access_token=' + accessToken, Object.assign({}, { messaging_type: "RESPONSE", recipient: { id: recipient } }, payload) ); } (1)(returns Promise of sending message); let async_actions; let promise_chain = Q

How to access values outside of axios request?

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问题 Very easy question. When I run console.log on the jsonPayload in line 6, I see the expected output. When I run console.log again on jsonPayload in the last line, it returns an empty {}. How do I access the payload outside of the initial request? var jsonPayload = {} axios.get('http://localhost:8080/api/tools') .then(function (response) { jsonPayload = response.data[0] // this returns the expected payload console.log(jsonPayload) }) .catch(function (error) { console.log(error) }) // this

Is it possible to apply passThrough() within a mock reply using axios-mock-adapter?

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问题 Environment: NodeJS 8.1.2 axios 0.16.2 axios-mock-adapter 1.9.0 Testing a JSON-RPC endpoint, am I able to do something like this: const mockHttpClient = new MockAdapter(axios, { delayResponse: 50 }) mockHttpClient.onPost().reply((config) => { // Capture all POST methods const dataObj = JSON.parse(config.data) // Example data: '{"jsonrpc":"2.0","method":"getProduct","params":[123],"id":0}' if (dataObj.method === 'getProduct') { // Recognised method, provide mock response override return [200,

Axios POST returns “Network Error” even if status is 200 and there's a response [duplicate]

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问题 This question already has answers here : XMLHttpRequest cannot load XXX No 'Access-Control-Allow-Origin' header (7 answers) Closed last year . I'm using Vue JS 2.5 with Axios: "vue": "^2.5.17", "vue-axios": "^2.1.4", "axios": "^0.18.0", I'm trying to make a POST call just like this: const data = querystring.stringify({ 'email': email, 'password': password, 'crossDomain': true, //optional, added by me to test if it helps but it doesn't help }); var axiosConfig = { headers: { 'Content-Type':

axios 拦截器显示和关闭Loading

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 使用Loading分为2种情况，第一种是使用一些组件库自带的loading，另一种是使用我们自己写的loading，现分开介绍使用方法一、使用element ui 带的Loading 1、在main.js 中引入axios 和elementui // 引入element-ui 组件 import ElementUI from 'element-ui' // 引入element-ui 样式文件 import 'element-ui/lib/theme-chalk/index.css' import axios from "axios" Vue.use(ElementUI) Vue.prototype.$axios = axios 2、在main.js 中设置Loading 显示和关闭函数 let loading; function startLoading() { //如果根实例设为变量VUE var VUE = new Vue({}) 也可写成下面的 // loading = VUE.$loading({ // lock: true, // text: "拼命加载中...", // background: 'rgba(0,0,0,0.2)' // }) loading = ElementUI.Loading