Issue #11924 has been updated by Nobuyoshi Nakada.

Status changed from Open to Third Party's Issue

----------------------------------------
Bug #11924: $ gem server is broken for documentation browsing
https://bugs.ruby-lang.org/issues/11924#change-55917

* Author: Marvin Glker
* Status: Third Party's Issue
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
The `$ gem server` command is broken. The gemserver doesn¡Çt find the stylesheets and javascripts, so that the browser only shows the unstyled, bare HTML.

Sample commandline session:

~~~~
% gem list ffi

*** LOCAL GEMS ***

ffi (1.9.10)
% gem rdoc --overwrite ffi
Parsing documentation for ffi-1.9.10
Installing ri documentation for ffi-1.9.10
% gem which ffi
/home/quintus/.gem/ruby/2.2.0/gems/ffi-1.9.10/lib/ffi.rb
% gem server
Server started at http://0.0.0.0:8808
Server started at http://[::]:8808
localhost.localdomain - - [29/Dec/2015:13:12:46 CET] "GET /doc_root/ffi-1.9.10/ HTTP/1.1" 200 14339
- -> /doc_root/ffi-1.9.10/
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/css/rdoc.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/rdoc.css
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/css/fonts.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/fonts.css
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/ffi-1.9.10/js/navigation.js HTTP/1.1" 404 14114
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/navigation.js
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/ffi-1.9.10/js/search.js HTTP/1.1" 404 14110
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/search.js
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/ffi-1.9.10/js/searcher.js HTTP/1.1" 404 14112
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/searcher.js
localhost.localdomain - - [29/Dec/2015:13:12:47 CET] "GET /doc_root/ffi-1.9.10/js/search_index.js HTTP/1.1" 200 60522
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/search_index.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/ffi-1.9.10/ HTTP/1.1" 200 14339
- -> /doc_root/ffi-1.9.10/
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/js/jquery.js HTTP/1.1" 200 91669
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/js/jquery.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/js/darkfish.js HTTP/1.1" 200 4666
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/js/darkfish.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/css/fonts.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/fonts.css
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/css/rdoc.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/rdoc.css
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/css/fonts.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/fonts.css
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/css/rdoc.css HTTP/1.1" 404 2048
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/css/rdoc.css
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/ffi-1.9.10/js/navigation.js HTTP/1.1" 404 14114
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/navigation.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/ffi-1.9.10/js/search_index.js HTTP/1.1" 200 60522
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/search_index.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/ffi-1.9.10/js/search.js HTTP/1.1" 404 14110
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/search.js
localhost.localdomain - - [29/Dec/2015:13:13:00 CET] "GET /doc_root/ffi-1.9.10/js/searcher.js HTTP/1.1" 404 14112
http://localhost:8808/doc_root/ffi-1.9.10/ -> /doc_root/ffi-1.9.10/js/searcher.js
~~~~

Output of `$ gem -v`: `2.4.5.1`

Notice the 404 errors when the web page is accessed. Expected behaviour is to correctly serve the CSS and JS files at the path where the documentation references them.

Greetings
Marvin



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