| 1 | -- utils.lua |
| 2 | -- Basic utilities/resources for git HTTP site implementation |
| 3 |
|
| 4 | -- Copyright (c) 2020 Joshua 'joshuas3' Stockin |
| 5 | -- <https://joshstock.in> |
| 6 |
|
| 7 | local _M = {} |
| 8 |
|
| 9 | string.split = function(str, delimiter) |
| 10 | local t = {} |
| 11 | if not str or str == "" then |
| 12 | return t |
| 13 | end |
| 14 | if delimiter == "" then -- string to table |
| 15 | string.gsub(str, ".", function(c) table.insert(t, c) end) |
| 16 | return t |
| 17 | end |
| 18 | delimiter = delimiter or "%s" |
| 19 | local str_len = string.len(str) |
| 20 | local ptr = 1 |
| 21 | while true do |
| 22 | local sub = string.sub(str, ptr, str_len) |
| 23 | local pre, after = string.find(sub, delimiter) |
| 24 | if pre then -- delimiter found |
| 25 | table.insert(t, string.sub(str, ptr, ptr + (pre - 2))) |
| 26 | ptr = ptr + after |
| 27 | else -- delimiter not found |
| 28 | table.insert(t, string.sub(str, ptr, str_len)) |
| 29 | break |
| 30 | end |
| 31 | end |
| 32 | return t |
| 33 | end |
| 34 |
|
| 35 |
|
| 36 | string.trim = function(str) |
| 37 | return str:match('^()%s*$') and '' or str:match('^%s*(.*%S)') |
| 38 | end |
| 39 |
|
| 40 |
|
| 41 | _M.process = function(command) |
| 42 | local output |
| 43 | local status, err = pcall(function() |
| 44 | local process = io.popen(command, "r") |
| 45 | assert(process, "Error opening process") |
| 46 | output = process:read("*all") |
| 47 | process:close() |
| 48 | end) |
| 49 | if status then |
| 50 | return output |
| 51 | else |
| 52 | return string.format("Error in call: %s", err or command) |
| 53 | end |
| 54 | end |
| 55 |
|
| 56 | _M.markdown = function(input) |
| 57 | local output |
| 58 | local status, err = pcall(function() |
| 59 | local tmpfile = os.tmpname() |
| 60 | local fp = io.open(tmpfile, "w") |
| 61 | fp:write(input) |
| 62 | fp:close() |
| 63 | local process = io.popen("md2html --github "..tmpfile, "r") |
| 64 | assert(process, "Error opening process") |
| 65 | output = process:read("*all") |
| 66 | process:close() |
| 67 | os.remove(tmpfile) |
| 68 | end) |
| 69 | if status then |
| 70 | return output |
| 71 | else |
| 72 | return string.format("Error in call: %s", err or command) |
| 73 | end |
| 74 | end |
| 75 |
|
| 76 | _M.highlight = function(input, file_name) |
| 77 | local output |
| 78 | local status, err = pcall(function() |
| 79 | local t = os.tmpname() |
| 80 | io.open(t,"w"):close() |
| 81 | os.remove(t) |
| 82 | local tmpfile = t..file_name |
| 83 | local fp = io.open(tmpfile, "w") |
| 84 | fp:write(input) |
| 85 | fp:close() |
| 86 | local process = io.popen("highlight --stdout -f --failsafe --inline-css "..tmpfile, "r") |
| 87 | assert(process, "Error opening process") |
| 88 | output = process:read("*all") |
| 89 | process:close() |
| 90 | os.remove(tmpfile) |
| 91 | end) |
| 92 | if status then |
| 93 | return output |
| 94 | else |
| 95 | return string.format("Error in call: %s", err or command) |
| 96 | end |
| 97 | end |
| 98 |
|
| 99 | _M.html_sanitize = function(str) |
| 100 | return tostring( |
| 101 | tostring(str):gsub("&", "&") |
| 102 | :gsub("<", "<") |
| 103 | :gsub(">", ">") |
| 104 | :gsub("\"", """) |
| 105 | :gsub("'", "'") |
| 106 | ) |
| 107 | end |
| 108 |
|
| 109 | _M.iso8601 = function(iso8601) |
| 110 | iso8601 = iso8601 or "0000-00-00T00:00:00GMT-5:00" |
| 111 | local y,mo,d,h,mi,s = iso8601:match("(%d%d%d%d)-(%d%d)-(%d%d)T(%d%d):(%d%d):(%d%d)") |
| 112 | local luatime = os.time{year=y,month=mo,day=d,hour=h,min=mi,sec=s} |
| 113 | return os.date("%d %b %Y %H:%M", luatime) |
| 114 | end |
| 115 |
|
| 116 | _M.print_table = function(t, l) -- for debugging |
| 117 | l = l or 0 |
| 118 | local n = false |
| 119 | for i,v in pairs(t) do n = true break end |
| 120 | if n then |
| 121 | ngx.print("{\n") |
| 122 | for i,v in pairs(t) do |
| 123 | for i=0,l do ngx.print(" ") end |
| 124 | ngx.print("<span style='color:red'>",i,"</span>: ") |
| 125 | if type(v) ~= "table" then |
| 126 | if type(v) == "string" then |
| 127 | ngx.print("\"") |
| 128 | local s = v:gsub("&", "&"):gsub("<","<"):gsub(">",">"):gsub("\"","\\"") |
| 129 | ngx.print(s) |
| 130 | ngx.print("\"") |
| 131 | else |
| 132 | ngx.print(v) |
| 133 | end |
| 134 | else |
| 135 | _M.print_table(v,l+1) |
| 136 | end |
| 137 | ngx.print("\n") |
| 138 | end |
| 139 | for i=0,l-1 do ngx.print(" ") end |
| 140 | ngx.print("}") |
| 141 | else |
| 142 | ngx.print("{}") |
| 143 | end |
| 144 | end |
| 145 |
|
| 146 | return _M |
| 147 |
|
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