404 error after following INSTALL.md

[coycatrett]

After following the INSTALL.md document, I am receiving a 404 error when I try to connect to
http://localhost:8080/nlab/show/Sandbox.

Here is the output after running unicorn_rails -c config/NLAB_UNICORN_CONF -E production

I, [2025-03-29T15:25:38.895738 #10097]  INFO -- : Refreshing Gem list
config.load_paths is deprecated and removed in Rails 3, please use autoload_paths instead
/home/coys-vm/dev/nlab/lib/instiki_stringsupport.rb:150: warning: key "empty" is duplicated and overwritten on line 565
/home/coys-vm/dev/nlab/lib/instiki_stringsupport.rb:141: warning: key "zeta" is duplicated and overwritten on line 814
/home/coys-vm/dev/nlab/lib/instiki_stringsupport.rb:335: warning: key "Dagger" is duplicated and overwritten on line 1522
/home/coys-vm/dev/nlab/lib/instiki_stringsupport.rb:336: warning: key "dagger" is duplicated and overwritten on line 1523
Route segment ":page_name" cannot be optional because it precedes a required segment. This segment will be required.
Route segment ":page_name" cannot be optional because it precedes a required segment. This segment will be required.
Route segment ":revision_number" cannot be optional because it precedes a required segment. This segment will be required.
Route segment ":page_name" cannot be optional because it precedes a required segment. This segment will be required.
Route segment ":revision_number" cannot be optional because it precedes a required segment. This segment will be required.
Route segment ":page_name" cannot be optional because it precedes a required segment. This segment will be required.
listening on addr=0.0.0.0:8080 fd=13
/home/coys-vm/dev/nlab/vendor/bundle/ruby/2.6.0/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:606: warning: constant ::Fixnum is deprecated
worker=0 ready
worker=1 ready
worker=2 ready
worker=3 ready
worker=4 ready
master process ready
worker=5 ready
10102: 2025-03-29 15:26:32 -0400: 

When connecting through the terminal via the following curl command: curl -v http://localhost:8080/nlab/show/Sandbox, I get this output:

* Host localhost:8080 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:8080...
* connect to ::1 port 8080 from ::1 port 55510 failed: Connection refused
*   Trying 127.0.0.1:8080...
* Connected to localhost (127.0.0.1) port 8080
> GET /nlab/show/Sandbox HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/8.5.0
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< Date: Sat, 29 Mar 2025 19:26:50 GMT
< Connection: close
< Cache-Control: no-cache
< Content-Type: text/html; charset=utf-8
< X-Runtime: 1
< Content-Length: 887
<

followed by the html for an error page.

I get the following response from unicorn_rails:

Processing WikiController#nlab (for 127.0.0.1 at 2025-03-29 15:26:50) [GET]
10102: 2025-03-29 15:26:50 -0400:   Parameters: {"web"=>"nlab", "id"=>"show/Sandbox"}
10102: 2025-03-29 15:26:50 -0400: Rendering template within layouts/error
10102: 2025-03-29 15:26:50 -0400: Filter chain halted as [:connect_to_model] rendered_or_redirected.
10102: 2025-03-29 15:26:50 -0400: Completed in 1ms (View: 0, DB: 0) | 404 Not Found [http://localhost/nlab/show/Sandbox]

I can connect to http://localhost:8080/nlab/show/Sandbox but all I see on the page is the text: Unknown web 'nlab' with a 404 error.

I am using a virtual machine to develop as of now and I am running it with the Ubuntu 24.04 LTS (Noble Numbat) OS.

I am not quite sure how to further diagnose or resolve this issue and I would appreciate any help. Thank you!

[coycatrett]

I am still learning so I may be making some simple mistakes.
When I was following the Setting Up MySQL part of the INSTALL.md document, I used the database dump with all of the tables but no data, as linked by the document. Could this be the reason for the 404 error that I am receiving? If so, where would I be able to find/generate the database dump with all of the data?

[sattlerc]

Apologies, I didn't see your post earlier.

Seems your installation worked. You should be able to see an nlab-style error page when you open the URL in your browser.

You can create a page like this: https://ncatlab.org/nlab/new/Sandbox

If so, where would I be able to find/generate the database dump with all of the data?

Discussion here #38 (comment)

[coycatrett]

@sattlerc All I see is a blank webpage with the text "Unknown web 'nlab'". I also have a failed GET request whenever I try to access anything from the localhost domain:
GET http://localhost:8080/nlab/show/Sandbox [HTTP/1.1 404 Not Found 2ms]

I understand that you may not be able to share the entire database dump. But I don't understand how creating a new page like this is going to help.

Is what I am seeing correct? If not, how can I fix it? If it is correct, how can I develop properly? Do you mind explaining a bit more how creating a new sandbox page is supposed to help with development?

[sattlerc]

Ah, I forgot that you don't even have a database entry for the nlab web.

[sattlerc]

I've shared a truncated database dump here: #38 (comment).

Let me know if this works for you.