404 Error: getaddrinfo ENOTFOUND https https: 80

[ctwh]

Hello,

I have Cors-anywhere hosted in a docker container on a server that receives traffic directed as a rewrite from another container running apache. The apache container runs a web app, and upon being loaded in the browser, sends requests via a proxy to cors-anywhere like:

https:///cors-anywhere/https://.../

A simple rewrite rule in the apache container directs traffic to the container running cors-anywhere:

RewriteRule "^/cors-anywhere/(.*)$" "http://${CORS_ANYWHERE_SERVER_HOST}:${CORS_ANYWHERE_SERVER_PORT}/$1" [P,NC,L]

When run locally, everything works fine. However, when hitting the server, I get this response:

Not found because of proxy error: Error: getaddrinfo ENOTFOUND https https: 80

I am aware that an issue was raised with an identical error, but I don't know how to address it in apache. Furthermore, I don't necessarily think the causes are the same either.
Possible related issue #167

[Rob--W]

The issue is the same: You're using normalized URLs.
You should be looking for the raw values instead. I suppose that you can reconstruct the raw URL with %{REQUEST_URI} and %{QUERY_STRING} or even %{THE_REQUEST} (in RewriteCond) and then refer to the captured groups from the regexp with %1, %2, etc.

See the documentation at https://httpd.apache.org/docs/current/mod/mod_rewrite.html#RewriteCond

[ctwh]

Thank you, @Rob--W !

My solution:

RewriteCond "%{REQUEST_URI}" "\/cors-anywhere\/https:\/(.*)"
RewriteRule "^/cors-anywhere/(.*)$" "http://${CORS_ANYWHERE_SERVER_HOST}:${CORS_ANYWHERE_SERVER_PORT}/https://%1" [P,NC,L]

Note above that RewriteCond still requires searching against a single slash (https:/) instead of (https://). If you use %{THE_REQUEST} it will be a raw url (requiring you to search for https://). The %{REQUEST_URI} I am using will also include query params for me.

Furthermore, I was not able to stack RewriteCond lines and extract multiple capture groups for each line and having a reference to them (e.g. using %1 for a capture group for the first RewriteCond, %2 for the second RewriteCond). That approach did not work, so my solution was driven by that limitation.

[a0309nkita]

Hi!

I'm working on angular project and from there I'm trying to post some logs to a server, but while hitting that server I got CORS error, and on searching I found that if I append https://cors-anywhere.herokuapp.com with my URL it'll work.

So after adding it my CORS error gone but now I'm getting proxy error like this:- Not found because of proxy error: Error: getaddrinfo ENOTFOUND ..com.

This is my code snippet
const response: any = await axios.post(LOGNESS_LOG_EVENT_URL, event, {
headers: EVENT_HEADERS(bearer),
});

and my LOGNESS_LOG_EVENT_URL is as :- https://cors-anywhere.herokuapp.com/https://********.

Please provide soln to this as I got stuck here.