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dotfiles/nvim/autoload/gemini_protocol.vim

135 lines
3.7 KiB

if !has_key(g:, 'gemini_follow_redirects')
" Do not set to false with the current gmni version
" It doesn't output redirect header to stdout
" Only use with submodule version
let g:gemini_follow_redirects = v:true
endif
if !has_key(g:, 'gemini_max_redirects')
let g:gemini_max_redirects = 5
endif
if !has_key(g:, 'gemini_gmni_command')
let g:gemini_gmni_command = shellescape(get(split(globpath(&rtp, 'gmni/gmni'), '\n'), 0, 'gmni'))
endif
if !has_key(g:, 'gemini_connect_with')
let g:gemini_connect_with = 'gmni'
endif
let s:url_regexp = '\v^[^:]+:\/\/%([^\@]+\@)?([^:\/]+)%(:(\d+))?%(\/.*)?$'
function! s:construct_command(url)
if g:gemini_connect_with ==? 'gmni'
return g:gemini_gmni_command . ' -j once -iN ' . (g:gemini_follow_redirects ? '-R ' . g:gemini_max_redirects . ' -L ' : '') . shellescape(a:url) . ' 2>/dev/null'
endif
let l:domain = substitute(a:url, s:url_regexp, '\1', '')
let l:port = substitute(a:url, s:url_regexp, '\2', '')
if l:port == ''
let l:port = '1965'
endif
if g:gemini_connect_with ==? 'openssl'
return 'echo ' . shellescape(a:url . "\r") . ' | openssl s_client -connect ' . shellescape(l:domain . ':' . l:port) . ' -quiet 2>/dev/null'
endif
if g:gemini_connect_with ==? 'ncat'
return 'echo ' . shellescape(a:url) . ' | ncat -C --ssl --no-shutdown ' . shellescape(l:domain) . ' ' . shellescape(l:port)
endif
echoerr 'Gemini: invalid gemini_connect_with value: ' . shellescape(g:gemini_connect_with)
return 'echo'
endfunction
let s:redirects = 0
function! s:read_gemini(url)
let l:svpos = winsaveview()
setlocal bl ro noswapfile bh=hide fenc=
if &ft == ''
setlocal ft=gmi
else
let &ft=&ft
endif
exe '%read ++bin !' . s:construct_command(a:url)
keepjumps normal! ggJ
let l:header = getline(1)
let b:gemini_header = l:header
keepjumps 1delete _
keepjumps call winrestview(l:svpos)
if l:header[0] == '3'
let l:new_url = trim(l:header[3:])
if has_key(g:, 'Gemini_redirect_function') && s:redirects < g:gemini_max_redirects
let s:redirects += 1
let l:new_url = g:Gemini_redirect_function(l:new_url)
if type(l:new_url) == 1
" String was returned
0file
exe 'file ' . fnameescape(l:new_url)
return s:read_gemini(l:new_url)
endif
else
" This plugin doesn't know, how to join urls,
" '/...', '//...' are not handled properly by :find
call append(0, '=> ' . l:new_url . ' Redirect')
endif
let s:redirects = 0
return
endif
let s:redirects = 0
if l:header[0] == '1'
let l:url = matchstr(a:url, '\v^[^\?\#]+') . '?' . s:uriencode(input(l:header[3:] . ': '))
0file
exe 'file ' . fnameescape(l:url)
return s:read_gemini(l:url)
endif
if l:header[0] == '2'
return
endif
if l:header == ''
let l:header = 'No data'
endif
" Output doesn't seem to work from autocommands
function! s:error_message(...) closure
redraw
echohl WarningMsg
echomsg 'Gemini: ' . l:header
echohl None
endfunction
call timer_start(0, funcref('s:error_message'))
return
endfunction
function! s:uriencode(str)
let l:res = ''
let l:digits = '0123456789ABCDEF'
for l:i in range(len(a:str))
let l:c = a:str[l:i]
if match(l:c, '\v^[A-Za-z0-9_]$') == -1
let l:n = char2nr(l:c)
let l:lo = l:digits[l:n % 16]
let l:hi = l:digits[l:n / 16]
let l:c = '%' . l:hi . l:lo
endif
let l:res .= l:c
endfor
return l:res
endfunction
aug GeminiProtocol
au!
au BufReadCmd gemini://* exe "sil doau BufReadPre ".fnameescape(expand("<amatch>"))|call s:read_gemini(expand("<amatch>"))|exe "sil doau BufReadPost ".fnameescape(expand("<amatch>"))
au FileReadCmd gemini://* exe "sil doau FileReadPre ".fnameescape(expand("<amatch>"))|call s:read_gemini(expand("<amatch>"))|exe "sil doau FileReadPost ".fnameescape(expand("<amatch>"))
aug END