I run an R Shiny app on port 3000 which serves my vue.js App like this:
library(shiny)
server <- function(input, output, session) {
histogramData <- reactive({
mtcars
})
observe({
session$sendCustomMessage("histogramData", histogramData())
})
}
ui <- function() {
htmlTemplate("dist/index.html")
}
# Serve the bundle at js/main.js
if (dir.exists("dist/js")) {
addResourcePath("js", "dist/js")
}
# Serve the bundle at js/main.js
if (dir.exists("dist/css")) {
addResourcePath("css", "dist/css")
}
# Serve the bundle at js/main.js
if (dir.exists("dist/img")) {
addResourcePath("img", "dist/img")
}
shinyApp(ui, server)
For development, I would change it like this:
ui <- function() {
htmlTemplate("public/index.html")
}
However, I can not always run the build process just to connect the apps, I want to use the dev server to connect the apps and send data back and forth.
I have setup a vue.config.js with the following configuration to create a connection between the two apps.
const path = require('path')
module.exports = {
publicPath: ".",
devServer: {
port: 4000,
contentBase: path.resolve(__dirname, 'public'),
proxy: {
'/': {
target: 'http://localhost:3000'
},
'/websocket': {
target: 'ws://localhost:3000',
ws: true
}
}
},
transpileDependencies: [
"vuetify"
]
}
This was taken from a github repository, I am acutally quite clueless how to archieve this connection. My idea was to connect go on localhost:4000 and receive the data from localhost:3000, but nothing gets passed:
TypeError: Cannot read property 'addCustomMessageHandler' of undefined at VueComponent.mounted (HelloWorld.vue?140d:42)
This is based on the following method in my vue component (which works perfectly after the build process):
mounted: function () {
window.Shiny.addCustomMessageHandler('histogramData', histogramData =>
this.data.histogramData = histogramData
)
Can anyone tell me what´s wrong and help me to setup the connection correctly?
Related
I have just created a new CRA app. In our organization we have a micro frontend framework which has certain requirements when it comes to the the asset file of each micro frontend app. CRA will by default, create a asset-manifest.json file.
https://github.com/facebook/create-react-app/blob/main/packages/react-scripts/config/webpack.config.js#L656
Now I need to change this file to assets.json and make some structural changes as well. To achieve this I use CRACO and add the WebpackManifestPlugin.
const ManifestPlugin = require('webpack-manifest-plugin');
module.exports = {
webpack: {
plugins: {
// tried removing CRA definition for ManifestPlugin.
// It worked, but had no impact on my problem
// remove: ['ManifestPlugin'],
add: [
new ManifestPlugin({
fileName: 'assets.json',
generate: (seed, files, entrypoints) => {
const js = [],
css = [];
files.forEach((file) => {
if (file.path.endsWith('.js') && file.isInitial) {
js.push({ value: file.path, type: 'entry' });
}
if (file.path.endsWith('.css') && file.isInitial) {
css.push({ value: file.path, type: 'entry' });
}
});
return { js, css };
},
})
]
}
}
};
Whenever I build the application, my new assets.json file is generated as expected.
However, I can't get CRA, or webpack-dev-server I assume, to serve this file while I run my CRA app in development mode. It only resolves to the index.html file. I have looked through CRA source code and can't really find any relevant place where asset-manifest.json is mentioned.
So how do I get webpack-dev-server to serve my assets.json file?
You need to add the ManifestPlugin to webpack.plugins.remove array to receive only the configuration from WebpackManifestPlugin:
...
webpack: {
alias: {},
plugins: {
add: [
new WebpackManifestPlugin(webpackManifestConfig)
],
remove: [
"ManifestPlugin"
],
},
configure: (webpackConfig, { env, paths }) => { return webpackConfig; }
},
...
I'm using vue.js with a flask server.
The 8080 vue.js dev env forwards axios queries to port 80 , cause my python flask server is always running on port 80, waiting for web services calls.
This is my vue.js vue.config.js file :
module.exports = {
outputDir: "dist",
// relative to outputDir
assetsDir: "static" ,
devServer: {
proxy: 'http://localhost:80'
}
};
everything works except that Im getting sock-js infinite loops, especially when developping on port 8080 :
How can I stop theses queries, please .
I there any way to only forwards AXIOS queries to port80, not the others things ?
https://github.com/webpack/webpack-dev-server/issues/1021
EDIT : Tried this with no luck
vue.config.js :
module.exports = {
outputDir: "dist",
// relative to outputDir
assetsDir: "static",
devServer: {
proxy: {
"^/api": {
target: "http://localhost:80"
}
}
}
};
error :
Error: Request failed with status code 404
EDIT : Hey Guys, finally resolved with this code , simply write this in your vue.config.js at the root of the vue.js app, so the wrong sockjs-node queries will get ignored, only web services will be forwarded :
module.exports = {
outputDir: "dist",
assetsDir: "static",
devServer: {
proxy: {
"/api": {
target: "http://localhost:80"
}
}
}
};
Then, do an axios query from vue.js like this :
const path = '/api/read_linear_solution';
axios.post(path, this.form)
Then, in ur python or node server , the web service must look like this 👍
#app.route('/api/read_linear_solution', methods=['POST'])
I have a very basic nuxt.js application using JSON in a local db.json file, for some reason the generated static site links leading to network error, but I can access them from the url or page refresh.
nuxt config
generate: {
routes () {
return axios.get('http://localhost:3000/projects')
.then((res) => {
return res.data.map((project) => {
return '/project/' + project.id
})
})
}
},
main root index page
data() {
return {
projects: []
}
},
async asyncData({$axios}){
let projects = await $axios.$get('http://localhost:3000/projects')
return {projects}
}
single project page
data() {
return {
id: this.$route.params.id
}
},
async asyncData({params, $axios}){
let project = await $axios.$get(`http://localhost:3000/projects/${params.id}`)
return {project}
}
P.S. I have edited the post with the code for the main and single project page
Issues with server-side requests of your application are caused by conflicts of ports on which app and json-server are running.
By default, both nuxt.js and json-server run on localhost:3000 and requests inside asyncData of the app sometimes do not reach correct endpoint to fetch projects.
Please, check fixed branch of your project's fork.
To ensure issue is easily debuggable, it is important to separate ports of API mock server and app itself for dev, generate and start commands.
Note updated lines in nuxt.config.js:
const baseURL = process.env.API_BASE_URL || 'http://localhost:3000'
export default {
server: {
port: 3001,
host: '0.0.0.0'
},
modules: [
['#nuxtjs/axios', {
baseURL
}]
],
generate: {
async routes () {
return axios.get(`${baseURL}/projects`)
.then((res) => {
return res.data.map((project) => {
return '/project/' + project.id
})
})
}
}
}
This ensures that API configuration is set from a single source and, ideally, comes from environmental variable API_BASE_URL.
Also, app's default port has been changed to 3001, to avoid conflict with json-server.
asyncData hooks have been updated accordingly to pass only necessary path for a request. Also, try..catch blocks are pretty much required for asyncData and fetch hooks, to handle error correctly and access error specifics.
I am newish to Nuxt world so I will try to describe what I need and what I was failing to do.
I am trying to programmatically build Nuxt application, bundle it and to mount it to a route
const { Nuxt, Builder } = require('nuxt');
const options = require('./nuxt.config.js');
const nuxt = new Nuxt(options);
try {
await new Builder(nuxt).build();
} catch(error) {
logger.error('Error building');
logger.log({ level: 'error', message: error });
}
So what I am interested in is programmatically controlling on how my Nuxt application will be bundled. That should not be an issue since my app is aware of their environment during build time.
So for production environment I would like to load everything bundled and minified/uglified and what else... So if possible I would like to load all html stuff + 1 JS file + 1 css file.
my example config file is
module.exports = {
build: {
// I should put something here
}
},
srcDir: 'app/view/',
modules: [
'#nuxtjs/axios',
'#nuxtjs/proxy'
],
head: {
script: [
{ rel: 'preload', src: `https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v3.2&appId=${facebookAppId}&autoLogAppEvents=1` }
],
meta: [
]
},
axios: {
port: 3010
},
router: {
middleware: [ /*my middlewares*/ ]
}
};
So the question is how can I control build in order to achieve what I want? Bonus point for me would be if I managed to load scripts from head.script and merge it to bundle.js file
I have 2 folder: server and src. Following: angular2-express-starter
Here is my REPO
server/app.ts:
import { routerUser } from "./routes/user";
const app: express.Application = express();
/* some stuff */
// api routes
// Set our api routes
app.use("/api/user", routerUser);
if (app.get("env") === "production") {
// in production mode run application from dist folder
console.log("PRODUCTION MODE");
app.use(express.static(path.join(__dirname, "/../client")));
}
/* some stuff */
src/app/app.router.ts
import { Routes } from '#angular/router';
import { PostsComponent } from './posts/posts.component';
export const routes: Routes = [
{ path: '', pathMatch: 'full', redirectTo: 'user/profile'},
{ path: 'user/profile', component: PostsComponent }
];
And following here
I able to run server and client in separated process with proxy config:
{
"/api/*": {
"target": "http://localhost:4300",
"secure": false
}
}
Like this:
tsc -p ./server/debug
node dist-debug/server/bin/www.js
ng server --host 0.0.0.0 --proxy-config proxy.conf.json
But issue come in production mode: build both server and client into dist folder.
When I access localhost:4300, it redirect to localhost:4300/user/profile automatically, it's fine.
But if I access direct to localhost:4300/user/profile
The page response: {"error":{},"message":"Not Found"}