Nginx:504 Gateway Timeout - node.js

I am using Nginx as my https server to serve my http content from my node server.
I am also hosting my server on google cloud.
I have been keep getting a 504 Gateway Timeout Error; So I wonder if it is because I didnt set my upstream server (node server) 8080 port open. Then it works. Not so sure if it is the correct way to do it
But then I kept looking other docs or tutorial online. I never see people configure in such way to connect to node server. They mainly only left the port 80 opened. So I wondered if my config in server block causing the 504 gateway problem
----------second update
this is my setting, and the default_server is written by default
but i always see doc have included a variable - server_name ; Actually I dont quite understand this varibale. May I know should I consider it or not for later use, although it works now
Aside, I got an
Server Error from my app.
FetchError: request to https://34.96.213.54:443/search/guest2 failed, reason: self-signed certificate
Why is that it works on chrome,although I get that api directly and postman successfully.
third updated------

About self-signed certificate: You need to buy one or using a free service like https://letsencrypt.org .Beside that your questions are so basic so you have to research more on nginx docs (http://nginx.org/en/docs/http/server_names.html)

Related

Codespaces and https

I have a working node.js express based server (and client) application here that shows RPC over http+websockets. This works perfectly when run locally (using devcontainers) and includes the Dockerfile as well as devcontainer.json. However, when run from a codespace, it fails with the following client-side error messages.
client.js:9 Mixed Content:
The page at 'https://aniongithub-jsonrpc-bidirectional-example-<redacted>-8080.preview.app.github.dev/'
was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint
'ws://aniongithub-jsonrpc-bidirectional-example-<redacted>-8080.preview.app.github.dev/api'.
This request has been blocked; this endpoint must be available over WSS.
(anonymous) # client.js:9
client.js:9 Uncaught DOMException: Failed to construct 'WebSocket':
An insecure WebSocket connection may not be initiated from a page loaded over HTTPS
at 'https://aniongithub-jsonrpc-bidirectional-example-<redacted>-8080.preview.app.github.dev/client.js:9:10'
The documentation here states that By default, GitHub Codespaces forwards ports using HTTP but you can update any port to use HTTPS, as needed. When I check the settings indicated:
it's set to http. What am I missing here? How can I get it to serve my express application over http?
Note: My intention is that when locally cloned and opened in a devcontainer, the code works just as it would if opened in a CodeSpace. This means I need to ensure that the certs generated by CodeSpaces are somehow factored into my local devcontainer process or that I forego authentication altogether. Alternatively, I need to find out if I'm running on CodeSpaces and do different things, which seems messy and shouldn't be the case. Hope this makes my intentions for asking this question clearer!
It turns out that I just couldn't use http for the RPC endpoint when running over https, so the solution was to use location.protocol and ws/wss depending on the current protocol to initialize the client RPC endpoint.

Production build of website can't make request to Node server while developement build can (possible SSL error ?)

I have a bit of a problem with a web page I'm making. Here's the situation :
I have a working NodeJs server that's online, hosted on a VPS.
I'm making a webpage that makes requests to this server. The requests work when I'm testing them from localhost or my local network.
When I put my website on my hosting service (different from the server), the requests fail.
Google Chrome return this error :
Failed to load resource: net::ERR_SSL_PROTOCOL_ERROR
The domain I have registered for my webpage has TSL1.3 I think, it it https for sure. So I thought it was a mismatch, like my website couldn't make requests to a simple http server that doesn't have any SSL or whatnot.
But when I looked into setting my server to use SSL or TSL or something like that, I got really confused. People recommended I use cloudflare as it provides certificates for free, but Cloudflare only works with domains, not stuff that runs on VPS with only an IP adress. I also tried following Certbot instructions to make a certificate myself but my VPS doesn't support snapd, even though it's Ubuntu 20.04.
Any attempt on my part to follow the rabbit hole of SSL certificates hasn't yielded anything, that's why I'm posting here. I don't even know if somehow getting a ssl certifcate will solve the problem.
Any help is much appreciated

node server placed behind proxy server failed to GET request to https://localhost:<port>

On my machine, im hosting a node server that is listening on port 5000. Before setting up a forward proxy (squid), i was able to perform a GET on https://localhost:<port>. However, after setting up a forward proxy and setting the environmental variable http_proxy=<ip addr:port>, this GET request no longer works.
The error that shows up is: tunnelling socket could not be established, statusCode=503
Some additional information:
The proxy server works as I am able to connect to the internet via it.
Performing curl instead, on the https:localhost:5000/api works.
Am using request.js for the requests, using agentOptions to specify TLS protocols & ca cert.
I am hoping to understand how the traffic is now different after i add in a proxy. From my understanding, now we have to go through a sort of TLS CONNECT / tunnelling since to the proxy first, since its a HTTPS request, before coming back to my localhost. But in the case without the proxy, how is it that its working?
Any help would be greatly appreciated. Thanks!
you must add
export no_proxy='localhost,127.0.0.1'
the https work because you don't use proxy for https , you must set https_proxy='<tour_proxy>'

IIS Apache and Node.JS HTTP all on the same server

I have one windows server already running sharepoint on 80/443 and the site works correctly.
We're trying to add more functionality by installing NodeJS and Apache
I've set apache to listen on 8080 and the default website comes up.
Node is running on 3000 and I can access the explorer that way as well.
My questions come from this. The server has a complete certificate chain installed on it and https://:8080 comes up correctly, but I can't get the node stuff to work on https: Secondly it appears while I have proxy pass set up correctly within my httpd.conf, either something is wrong within that as if I goto the https://:8080 /api/and anything beyond that, I get 503 errors and the page can't be displayed.
I'm unsure what I'm doing incorrectly here as from reading the documentation on proxy module, it seems that everything is setup and configured correctly.
Netstat shows listening on 3000 and 8080 and 80/443 for my SharePoint farm.
I had to configure the ssl settings for the proxypass to use the IP address of the local machine. After doing that I was able to connect correctly.
This allowed for connecting on :3000 via telnet to the localmachine and allowed for explorer to be viewed with https://:8080 the correct way enforcing our certificates.

WebSocket over SSL: Cloudflare

I have a website behind cloudflare. I need to enable websockets over SSL without turning off cloudflare support. I have a PRO plan and hence won't get the new websocket support. I am using Nginx to proxy a SSL connection to a web socket running on a node server. Now, I read somewhere that cloudflare could work with approved ports would support websockets. Hence, I'm using 8443 for the Nginx port and another port for the node server. Using wscat it returns a 200 error.
$ wscat -c wss://xyz.com:8443
error: Error: unexpected server response (200)
I know that the websocket is expecting a 101 code. However, if I visit https://xyz.com:8443, I can see the page displayed by the node server telling me proxy is working. Also, once I turn off cloudflare support, the websocket starts working. Any clues to get this working. I know I can create a subdomain but I'd prefer running the websocket behind cloudflare.
If you're trying to access this through CloudFlare's network you'd need to explicitly have web sockets enabled on your domain before they will work -- regardless of the port. As in, even if the port can pass through our network, that won't automatically mean that web sockets will be enabled or accessible on your domain.
You can try contacting our support team to request an exception to see if they can enable it for your domain, but typically this is still only available at the business and enterprise levels.
Disclaimer: I work at CloudFlare.

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