XMLHttpRequest blocked by CORS policy

Question

I want to create an application which interacts with a local file which acts as a database of JSON object.

I followed Stackoverflow :

https://code.sololearn.com/WjcNo9zLK55l/?ref=app

But it logs error message:

Access to XMLHttpRequest at 'file:///C:/Users/Gordon/Desktop/testing.txt' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.

How to solve this?

But if I set some low protection level, means malicious attempt from Internet also allowed?

Answer 1

Run local server to access the web file.
If you do not have local server installed.

Use cmd prompt to run
npm install http-server -g
to install a local server
(You need to have nodejs installed)

Then run
http-server -p8000
from your working folder.

Open browser with address http://localhost:8000

Answer 2

Gordon you have to use http protocol instead of file protocol. Also you can try to include crossorigin ="anonymous"

Answer 3

Gordon i don't think so :)

-http protocol == web hosting or you can host it on your local machine using xampp

-file transfer protocol == your local computer that runs your index.html file => here cors won't let you continue

Answer 4

r8w9 oh i see, thanks

Answer 5

//You can use this API, it enables cross-origin requests to anywhere. 

https://cors-anywhere.herokuapp.com

://Deom
https://github.com/Rob--W/cors-anywhere

Answer 6

🤔

But I want to process sensitive information of my company, and so I don't want the data to be uploaded to somewhere. Is there any way?

Answer 7

Sololearn playground is running from codes.sololearn domain, so you have cors issue.

If you create local html/js file, it should be working fine.

Answer 8

Dy defualt, your windows blocks the web access from outside, unless you configure it to allow your ip to expose to web through port 80

Answer 9

You always can check from your current ip address.
https://www.whatismyip.com

By opening the address from browser.

Answer 10

Coder understand, current trend is to print logs in html

Answer 11

Calviղ but it prompts this error when I am running the file locally.

Answer 12

Do you have locals server?

Answer 13

Calviղ if I configure this way, means someone outside can also access these files on my computer? 🤔

Answer 14

r8w9 oh i can use http protocol to access local files?