Mercurial > prosody-modules
annotate mod_pastebin/mod_pastebin.lua @ 515:e98fe28c50b0
mod_host_guard: added exceptions/whitelisting to the blockall logic (makes little sense otherwise has s2s_disallow = true does the same)
| author | Marco Cirillo <maranda@lightwitch.org> |
|---|---|
| date | Tue, 20 Dec 2011 20:19:53 +0000 |
| parents | 46e1983486e9 |
| children | 3d3687fef751 |
| rev | line source |
|---|---|
| 5 | 1 |
| 2 local st = require "util.stanza"; | |
| 3 local httpserver = require "net.httpserver"; | |
| 4 local uuid_new = require "util.uuid".generate; | |
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5 local os_time = os.time; |
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6 local t_insert, t_remove = table.insert, table.remove; |
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7 local add_task = require "util.timer".add_task; |
| 5 | 8 |
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9 local utf8_pattern = "[\194-\244][\128-\191]*$"; |
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10 local function drop_invalid_utf8(seq) |
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11 local start = seq:byte(); |
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12 module:log("utf8: %d, %d", start, #seq); |
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13 if (start <= 223 and #seq < 2) |
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14 or (start >= 224 and start <= 239 and #seq < 3) |
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15 or (start >= 240 and start <= 244 and #seq < 4) |
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16 or (start > 244) then |
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17 return ""; |
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18 end |
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19 return seq; |
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20 end |
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21 |
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22 local function utf8_length(str) |
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23 local _, count = string.gsub(str, "[^\128-\193]", ""); |
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24 return count; |
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25 end |
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26 |
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27 local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", hosts[module.host].type ~= "component"); |
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28 local length_threshold = module:get_option_number("pastebin_threshold", 500); |
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29 local line_threshold = module:get_option_number("pastebin_line_threshold", 4); |
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30 local max_summary_length = module:get_option_number("pastebin_summary_length", 150); |
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31 local html_preview = module:get_option_boolean("pastebin_html_preview", true); |
| 5 | 32 |
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33 local base_url = module:get_option_string("pastebin_url"); |
| 5 | 34 |
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35 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours |
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36 local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600); |
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37 |
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38 local trigger_string = module:get_option_string("pastebin_trigger"); |
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39 trigger_string = (trigger_string and trigger_string .. " "); |
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40 |
| 5 | 41 local pastes = {}; |
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42 local default_headers = { ["Content-Type"] = "text/plain; charset=utf-8" }; |
| 5 | 43 |
| 44 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im"; | |
| 45 local xmlns_xhtml = "http://www.w3.org/1999/xhtml"; | |
| 46 | |
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47 if expire_after == 0 then |
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48 local dm = require "util.datamanager"; |
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49 setmetatable(pastes, { |
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50 __index = function (pastes, id) |
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51 if type(id) == "string" then |
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52 return dm.load(id, module.host, "pastebin"); |
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53 end |
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54 end; |
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55 __newindex = function (pastes, id, data) |
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56 if type(id) == "string" then |
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57 dm.store(id, module.host, "pastebin", data); |
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58 end |
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59 end; |
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60 }); |
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61 else |
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62 setmetatable(pastes, nil); |
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63 end |
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64 |
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65 function pastebin_text(text) |
| 5 | 66 local uuid = uuid_new(); |
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67 pastes[uuid] = { body = text, time = os_time(), headers = default_headers }; |
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68 pastes[#pastes+1] = uuid; |
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69 if not pastes[2] then -- No other pastes, give the timer a kick |
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70 add_task(expire_after, expire_pastes); |
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71 end |
| 5 | 72 return base_url..uuid; |
| 73 end | |
| 74 | |
| 75 function handle_request(method, body, request) | |
| 76 local pasteid = request.url.path:match("[^/]+$"); | |
| 77 if not pasteid or not pastes[pasteid] then | |
| 78 return "Invalid paste id, perhaps it expired?"; | |
| 79 end | |
| 80 | |
| 81 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text); | |
| 82 | |
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83 return pastes[pasteid]; |
| 5 | 84 end |
| 85 | |
| 86 function check_message(data) | |
| 87 local origin, stanza = data.origin, data.stanza; | |
| 88 | |
| 89 local body, bodyindex, htmlindex; | |
| 90 for k,v in ipairs(stanza) do | |
| 91 if v.name == "body" then | |
| 92 body, bodyindex = v, k; | |
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93 elseif v.name == "html" and v.attr.xmlns == xmlns_xhtmlim then |
| 5 | 94 htmlindex = k; |
| 95 end | |
| 96 end | |
| 97 | |
| 98 if not body then return; end | |
| 99 body = body:get_text(); | |
| 100 | |
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101 --module:log("debug", "Body(%s) length: %d", type(body), #(body or "")); |
| 5 | 102 |
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103 if body and ( |
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104 ((#body > length_threshold) |
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105 and (utf8_length(body) > length_threshold)) or |
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106 (trigger_string and body:find(trigger_string, 1, true) == 1) or |
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107 (select(2, body:gsub("\n", "%0")) >= line_threshold) |
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108 ) then |
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109 if trigger_string then |
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110 body = body:gsub("^" .. trigger_string, "", 1); |
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111 end |
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112 local url = pastebin_text(body); |
| 5 | 113 module:log("debug", "Pasted message as %s", url); |
| 114 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex])); | |
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115 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or ""; |
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116 summary = summary:match("^%s*(.-)%s*$"); |
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117 local summary_prefixed = summary:match("[,:]$"); |
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118 stanza[bodyindex][1] = (summary_prefixed and (summary.." ") or "")..url; |
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119 |
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120 if html_preview then |
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121 local line_count = select(2, body:gsub("\n", "%0")) + 1; |
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122 local link_text = ("[view %spaste (%d line%s)]"):format(summary_prefixed and "" or "rest of ", line_count, line_count == 1 and "" or "s"); |
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123 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml }); |
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124 html:tag("p"):text(summary.." "):up(); |
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125 html:tag("a", { href = url }):text(link_text):up(); |
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126 stanza[htmlindex or #stanza+1] = html; |
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127 end |
| 5 | 128 end |
| 129 end | |
| 130 | |
| 131 module:hook("message/bare", check_message); | |
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132 if pastebin_private_messages then |
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133 module:hook("message/full", check_message); |
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134 end |
| 5 | 135 |
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136 function expire_pastes(time) |
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137 time = time or os_time(); -- COMPAT with 0.5 |
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138 if pastes[1] then |
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139 pastes[pastes[1]] = nil; |
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140 t_remove(pastes, 1); |
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141 if pastes[1] then |
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142 return (expire_after - (time - pastes[pastes[1]].time)) + 1; |
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143 end |
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144 end |
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145 end |
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146 |
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147 |
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148 local ports = module:get_option("pastebin_ports", { 5280 }); |
| 5 | 149 for _, options in ipairs(ports) do |
| 150 local port, base, ssl, interface = 5280, "pastebin", false, nil; | |
| 151 if type(options) == "number" then | |
| 152 port = options; | |
| 153 elseif type(options) == "table" then | |
| 154 port, base, ssl, interface = options.port or 5280, options.path or "pastebin", options.ssl or false, options.interface; | |
| 155 elseif type(options) == "string" then | |
| 156 base = options; | |
| 157 end | |
| 158 | |
| 159 base_url = base_url or ("http://"..module:get_host()..(port ~= 80 and (":"..port) or "").."/"..base.."/"); | |
| 160 | |
| 161 httpserver.new{ port = port, base = base, handler = handle_request, ssl = ssl } | |
| 162 end | |
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163 |
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164 function module.save() |
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165 return { pastes = pastes }; |
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166 end |
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167 |
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168 function module.restore(data) |
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169 pastes = data.pastes or pastes; |
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170 end |