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Koa interface cross-domain error report
several interfaces are written with koa+mongodb. Cross-domain errors are always reported when requesting with ajax, even if cors is used in koa. Google has done a lot of things but still hasn t solved the problem .
const cors = require( koa2-cors );
...
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Koa2 queries the result object of the database and adds new attributes, but the front end cannot get it asynchronously.
1. First of all, get the order list through the query, and then add the user name and user password for each order object through the for loop. When I console.log, the console has output, but when I, ctx.body = {data:orderList}, the result obtained asyn...
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Node server rendered page, a tag opens the URL of this page will report 400, invalid request
RT Route is: koa-router A parameter is handwritten in the browser address bar, which can be obtained by the server. It is written on the a tag but reported 400 ....
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Is it good to have two koa programs on the same server, one for interface and one for server rendering?
is it necessary for RT: to do this?
if you don t think this is necessary, how can koa-router standardize the interface path and html path?
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Can fs in node koa2 create js files?
there is no problem in creating a file in txt format, but when you create a file in js format, you will see that [object Object] is written like this. IndustryReader is a [{}] Array (object) format from other files.
const industryReader = require(...
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What does app.keys mean in koa-session?
const session = require( koa-session );
const Koa = require( koa );
const app = new Koa();
app.keys = [ some secret hurr ];
const CONFIG = {
key: koa:sess , ** (string) cookie key (default is koa:sess) *
** (number || session ) maxAge...
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How to set the static resource server of koa dynamically
I want to request different static files according to the type of client for example, the same address requested by my mobile rel= and pc http: localhost:3000 images 1.jpg, but the returned image is different .
const Koa = require( koa )
const path...
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How to return the result when nodejs is uploaded to Aliyun oss file koa2
here I want to use the latest asynchronous way of es6 to achieve, ask for your advice! As I wrote below, I can upload pictures, but I just can t return the body data. So the result is that the picture has actually been uploaded, but the interface shows...
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How can node be returned to the browser after the result is obtained by calling the backend api, as the middle tier?
the leader requires that if you use node as the middle layer, request the backend api,node layer to use the koa2 (2.5.1) framework to provide an interface to the browser, but it is normal to return some dead data as a test when the backend development i...
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After koa2 sets cors to a specific url, the frontend ajax cannot cross the domain after customizing the header. If the header is removed, it can cross the domain.
app.js
< span>
No Access-Control-Allow-Origin headerAccess-Control-Allow-Headers
axios.post(`http: localhost:8089 api test`, null)
.then(response => {
console.log(response.data);
});
find a solution
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Nodejs's koa2 project is deployed in ubuntu. Do you need nginx?
the project I wrote in koa2 is ready to be deployed on the test server. The server has pm2, installed and started. Do you need nginx configuration? and after I started, I seemed to prompt that the mongodb service did not start, how should I start it? ...
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Problems with mongoose query
Room schema
var Room = new Schema({
title: String,
author: String,
body: String,
owners: [ { type: ObjectId, ref: User , index: true } ]
})
Room.find({ owners: user })
first question: why can the query here be written this way? How...
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Is there any good solution to the loss of local store data after using KOA2+Sequelize+redux to access the remote interface?
problem description
use KOA2+Sequelize to make a simple todo column, access the remote interface, add and modify actions, and the local store data is emptied
the environmental background of the problems and what methods you have tried
search Baidu...
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Koa2 upload file stream did not finish processing the direct return result?
const router = require( koa-router )();
const fs = require( fs );
router.post( upload , async (ctx){
const file = ctx.request.body.files.file;
const reader = fs.createReadStream(file.path);
const ext = file.name.split( ...
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Export Asynchronous return value in Koa2
Abstract a Mongodb instance module in koa2.
mongoUtil.js
const MongoClient = require( mongodb ).MongoClient;
async function getMongoDB() {
try {
const client = await new MongoClient( mongodb: localhost:27017 test ).connect();
db = cl...
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Writing Wechat in koa2.0 feels like a callback.
recently I am learning the development of Wechat public platform. The sentence koa2.0,ctx.body = "success " is correctly returned to Wechat at the comment, and the callback function can be executed but cannot be received by Wechat.
let fn_getInfo = as...
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After sequelize-cli added the foreign key of model, how to Synchronize to the database?
the model, created by sequelize-cli modifies the foreign key associate hasMany and other relationships, how to Synchronize this foreign key relationship to the database? ...
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Does node, as the middle tier, send requests to the back end and receive browser requests more often?
excuse me, is there a big god who is proficient in using node to do the middle platform? is it using koa? how does it feel and how does the effect compare with before? if I want to learn, do you have any documents that you can recommend? Or a case! ...
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How to set multiple session with different configurations by koa-session (for example, the expiration time is different)
the configuration of koa-session middleware is uniform, so what should I do when I set two session with different expiration times? ...
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I'd like to ask about the difference between the two front-end and front-end separate project file structures.
I have seen two structures. The first is that there is a static folder in the back-end project, which contains the packaged front-end code, and the other is that a server folder is added to the front-end folder, which is the back-end code. I am doing the...
