How can I connect localhost of the host machine? - reactjs

I was trying to host react as a frontend and rails as backend.
I host rails at http://localhost:3000.
You can see that it is working.
But when I call http://localhost:3000 from react, instead of going to server's localhost, it go to user's localhost.
How can I fix this? I am using Nginx as web server.

I just solved by doing reverse proxy in Nginx.
location / {
try_files $uri /index.html;
}
location /api {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
first location / will find static frontend files and /api will go to localhost:3000.
For example, in my case
this.url='https://yourdomain.com/api/' to access the backend.
Also don't forget all of your backend route to start with 'api/'.

Related

Websocket error when using a proxy_pass to CRA development server using Nginx and Docker

I am trying to proxy_pass in Nginx to my React dev server at localhost:3000. It currently works but I am seeing an error in my console which I am unsure will cause any issues down the road:
WebSocketClient.js:16 WebSocket connection to 'ws://localhost/ws' failed:
Nginx.conf:
upstream backend {
server backend:8000;
}
upstream frontend {
server frontend:3000;
}
server {
listen 80;
location / {
proxy_pass http://frontend$request_uri;
proxy_set_header Host $http_host;
}
location /api/ {
proxy_pass http://backend;
proxy_set_header Host $http_host;
}
location /admin/ {
proxy_pass http://backend;
proxy_set_header Host $http_host;
}
}
I have tried adding WDS_SOCKET_PORT=0 to the frontend .env file also tried adding:
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
...as suggested in other SO posts. Neither worked.
What is this error? How can I fix it?
I solved this by adding more in the variables
environment:
- WDS_SOCKET_PORT=443
Maybe it can help you, but if you haven't proxy between, use WDS_SOCKET_PORT=0 in docker-compose.yml
Try this:
environment:
- WDS_SOCKET_PORT=443
It works for me

React app doesnt launch from url location as set by nginx reverse proxy but does when port explicitly set

I'm trying to run a single react app on a separate port and using proxy pass from nginx to location '/app'
"http://localhost/app" -> React Application
The application is running under PM2 using its generated build with the command: 'pm2 serve build 3002'.
My thought was i do all this tested locally and then will port it to my own domain.
I've swapped 'localhost' for '127.0.0.1' just in case that had anything to do with it.
From online tutorials i've ended up with the following in my nginx "../sites-available/my_domain" file
server {
listen 80;
listen [::]:80;
server_name localhost;
location / {
root /var/www/my_domain/html;
index index.html index.htm index.nginx-debian.html;
try_files $uri $uri/ =404;
}
location /app {
proxy_pass http://localhost:3002;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
If i type "http://localhost:3002" into the url it works fine however "http://localhost/app" does not work and shows 404 error.
Side-note: "http://localhost" works fine and directs to the index.html stored at root.

NGINX proxy pass to React App not working

I want to run the following projects using NGINX under a single subdomain: http://localhost:3000 (Loopback API) and http://localhost:3006 (React Application)
Both applications are running under PM2. React App is running in production (using its generated build) with the command: 'pm2 serve build 3006'.
/etc/nginx/sites-available/default
server {
listen 80;
server_name subdomain.domain.com;
location / {
proxy_pass http://localhost:3006;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
try_files $uri /index.html;
}
location /api {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
Loopback project under location /api es working perfectly. The issue is with my React project under my / route. When I enter to subdomain.domain.com I just get a blank page. In the developer console I'm getting the following errors:
Using http://localhost:3006 to access my React App works perfectly fine with no console issues so I'm totally sure it is something related with nginx.
I have been investigating a lot about the incorrect MIME type being loaded, but my /etc/nginx/nginx.conf is already running with the following configuration:
http {
include /etc/nginx/mime.types;
}
I would really appreciate your help, thanks.
Are you using Create React App? By default, its build script assumes the app is going to be served in the root directory. To correctly serve React under a subdirectory, you need to specify homepage in your package.json file.
"homepage" : "http://example.com/your-subdirectory"
Additionally, you'll want to modify server/app.js to reflect this change.
app.use('/your-subdirectory/api', require('./api'));
Lastly, and most importantly, you'll want to set a basename for React Router as well.
const Routes = () => {
return (
<Router basename={'/your-subdirectory'}>
<div>
<Route exact path={`/`}component={App} />
</div>
</Router>
)
};
There is no need to use pm2 since they are static files and nginx is able to serve it by itself.
You just have to let nginx know where the files are.
server {
listen 80;
root /home/user/app/buld <--- LOCATION_OF_YOUR_BUILD
index index.html
server_name subdomain.domain.com;
location / {
try_files $uri /index.html
}
location /api {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}

How do I set up proxy for production react application?

I am developing a React application which consumes a REST API running on another server. Now, in development, I am using the proxy by adding the proxy field in package.json.
I am wondering how I can configure a proxy for the production application so that my REST request can be routed to the other server. Any ideas?
The proxy variable in your package.js file is only being used in development. I assume you are using create-react-app, here is the doc.
The way I routed all the API requests in my react app is by proxying all the requests through Nginx. Of course, it really depends on wich web server you are using.
Considering you are making all the requests to an /API endpoint you can proxy all the requests like this:
location / {
try_files $uri $uri/ /index.html;
add_header Cache-Control public;
expires 1d;
}
location /api {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://yourapiserver:port/;
}

How to configure NGINX to serve a JSON API and a React.js on the same box

I have been working on JSON API written in Elixir using the phoenix framework, and I successfully deployed yesterday. However, the API is not that useful with out a web frontend, which I wrote one as well using React.js.
I'm deploying the phoenix API using a combination of distillery and gatling, and everything appears to be working when I test it using Postman.
Then I edited the nginx configuration file to loook like the following,
/etc/nginx/sites-available/kegcopr_api
server {
listen 80;
server_name kegcopr.chrisrjones.com;
root /opt/Code/react/kegcopr-frontend/build;
index index.html index.htm;
access_log /home/deploy/deployments/kegcopr_api/nginx.access.log;
error_log /home/deploy/deployments/kegcopr_api/nginx.error.log;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://localhost:33725;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}
I then created a .env file in the root of React.js project with the following line,
REACT_APP_API_URL=http://localhost:33725/api
Any help on how to get this configured would greatly be appreciated.
UPDATE
I changed the .env file to,
REACT_APP_API_URL=http://kegcopr.chrisrjones.com/api
and ran the below command,
npm run build
but I am still not seeing the React.js frontend display in the browser.
You have set the root directory, but you're sending all requests unconditionally to localhost:33725. If you want to serve static files from the root directory and pass all other requests to the proxy_pass, you can use try_files like this:
location / {
try_files $uri #proxy;
}
location #proxy {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://localhost:33725;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
try_files will try to locate the file within root with the same name as the URL, and if it fails to find a file, it'll pass the request to #proxy, which will pass it to the Phoenix app running on localhost:33725.

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